[Code of Federal Regulations]
[Title 29, Volume 5]
[Revised as of January 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 29CFR1910.184]
[Page 577-599]
TITLE 29--LABOR
CHAPTER XVII--OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT
OF LABOR
PART 1910_OCCUPATIONAL SAFETY AND HEALTH STANDARDS--Table of Contents
Subpart N_Materials Handling and Storage
Sec. 1910.184 Slings.
(a) Scope. This section applies to slings used in conjunction with
other material handling equipment for the movement of material by
hoisting, in employments covered by this part. The types of slings
covered are those made from alloy steel chain, wire rope, metal mesh,
natural or synthetic fiber rope (conventional three strand
construction), and synthetic web (nylon, polyester, and polypropylene).
(b) Definitions. Angle of loading is the inclination of a leg or
branch of a sling measured from the horizontal or vertical plane as
shown in Fig. N-184-5; provided that an angle of loading of five degrees
or less from the vertical may be considered a vertical angle of loading.
Basket hitch is a sling configuration whereby the sling is passed
under the load and has both ends, end attachments, eyes or handles on
the hook or a single master link.
Braided wire rope is a wire rope formed by plaiting component wire
ropes.
Bridle wire rope sling is a sling composed of multiple wire rope
legs with the top ends gathered in a fitting that goes over the lifting
hook.
Cable laid endless sling-mechanical joint is a wire rope sling made
endless by joining the ends of a single length of cable laid rope with
one or more metallic fittings.
Cable laid grommet-hand tucked is an endless wire rope sling made
from one length of rope wrapped six times around a core formed by hand
tucking the ends of the rope inside the six wraps.
Cable laid rope is a wire rope composed of six wire ropes wrapped
around a fiber or wire rope core.
Cable laid rope sling-mechanical joint is a wire rope sling made
from a cable laid rope with eyes fabricated by pressing or swaging one
or more metal sleeves over the rope junction.
Choker hitch is a sling configuration with one end of the sling
passing under the load and through an end attachment, handle or eye on
the other end of the sling.
Coating is an elastomer or other suitable material applied to a
sling or to a sling component to impart desirable properties.
Cross rod is a wire used to join spirals of metal mesh to form a
complete fabric. (See Fig. N-184-2.)
Designated means selected or assigned by the employer or the
employer's representative as being qualified to perform specific duties.
Equivalent entity is a person or organization (including an
employer) which, by possession of equipment, technical knowledge and
skills, can perform with equal competence the same repairs and tests as
the person or organization with which it is equated.
Fabric (metal mesh) is the flexible portion of a metal mesh sling
consisting of a series of transverse coils and cross rods.
Female handle (choker) is a handle with a handle eye and a slot of
such dimension as to permit passage of a male handle thereby allowing
the use of a metal mesh sling in a choker hitch. (See Fig. N-184-1.)
Handle is a terminal fitting to which metal mesh fabric is attached.
(See Fig. N-184-1.)
Handle eye is an opening in a handle of a metal mesh sling shaped to
accept a hook, shackle or other lifting device. (See Fig. N-184-1.)
Hitch is a sling configuration whereby the sling is fastened to an
object or load, either directly to it or around it.
Link is a single ring of a chain.
Male handle (triangle) is a handle with a handle eye.
Master coupling link is an alloy steel welded coupling link used as
an intermediate link to join alloy steel chain to master links. (See
Fig. N-184-3.)
Master link or gathering ring is a forged or welded steel link used
to support all members (legs) of an alloy steel chain sling or wire rope
sling. (See Fig. N-184-3.)
Mechanical coupling link is a nonwelded, mechanically closed steel
link used to attach master links, hooks, etc., to alloy steel chain.
[[Page 578]]
[GRAPHIC] [TIFF OMITTED] TC27OC91.045
[[Page 579]]
[GRAPHIC] [TIFF OMITTED] TC27OC91.046
[[Page 580]]
[GRAPHIC] [TIFF OMITTED] TC27OC91.047
Proof load is the load applied in performance of a proof test.
Proof test is a nondestructive tension test performed by the sling
manufacturer or an equivalent entity to verify construction and
workmanship of a sling.
Rated capacity or working load limit is the maximum working load
permitted by the provisions of this section.
Reach is the effective length of an alloy steel chain sling measured
from the top bearing surface of the upper terminal component to the
bottom bearing surface of the lower terminal component.
Selvage edge is the finished edge of synthetic webbing designed to
prevent unraveling.
Sling is an assembly which connects the load to the material
handling equipment.
Sling manufacturer is a person or organization that assembles sling
components into their final form for sale to users.
Spiral is a single transverse coil that is the basic element from
which metal mesh is fabricated. (See Fig. N-184-2.)
Strand laid endless sling-mechanical joint is a wire rope sling made
endless from one length of rope with the ends joined by one or more
metallic fittings.
Strand laid grommet-hand tucked is an endless wire rope sling made
from one length of strand wrapped six times around a core formed by hand
tucking the ends of the strand inside the six wraps.
Strand laid rope is a wire rope made with strands (usually six or
eight) wrapped around a fiber core, wire strand core, or independent
wire rope core (IWRC).
Vertical hitch is a method of supporting a load by a single,
vertical part or leg of the sling. (See Fig. N-184-4.)
(c) Safe operating practices. Whenever any sling is used, the
following practices shall be observed:
(1) Slings that are damaged or defective shall not be used.
[[Page 581]]
(2) Slings shall not be shortened with knots or bolts or other
makeshift devices.
(3) Sling legs shall not be kinked.
(4) Slings shall not be loaded in excess of their rated capacities.
(5) Slings used in a basket hitch shall have the loads balanced to
prevent slippage.
(6) Slings shall be securely attached to their loads.
(7) Slings shall be padded or protected from the sharp edges of
their loads.
(8) Suspended loads shall be kept clear of all obstructions.
(9) All employees shall be kept clear of loads about to be lifted
and of suspended loads.
(10) Hands or fingers shall not be placed between the sling and its
load while the sling is being tightened around the load.
(11) Shock loading is prohibited.
(12) A sling shall not be pulled from under a load when the load is
resting on the sling.
(d) Inspections. Each day before being used, the sling and all
fastenings and attachments shall be inspected for damage or defects by a
competent person designated by the employer. Additional inspections
shall be performed during sling use, where service conditions warrant.
Damaged or defective slings shall be immediately removed from service.
(e) Alloy steel chain slings--(1) Sling identification. Alloy steel
chain slings shall have permanently affixed durable identification
stating size, grade, rated capacity, and reach.
(2) Attachments. (i) Hooks, rings, oblong links, pear shaped links,
welded or mechanical coupling links or other attachments shall have a
rated capacity at least equal to that of the alloy steel chain with
which they are used or the sling shall not be used in excess of the
rated capacity of the weakest component.
(ii) Makeshift links or fasteners formed from bolts or rods, or
other such attachments, shall not be used.
(3) Inspections. (i) In addition to the inspection required by
paragraph (d) of this section, a thorough periodic inspection of alloy
steel chain slings in use shall be made on a regular basis, to be
determined on the basis of (A) frequency of sling use; (B) severity of
service conditions; (C) nature of lifts being made; and (D) experience
gained on the service life of slings used in similar circumstances. Such
inspections shall in no event be at intervals greater than once every 12
months.
(ii) The employer shall make and maintain a record of the most
recent month in which each alloy steel chain sling was thoroughly
inspected, and shall make such record available for examination.
(iii) The thorough inspection of alloy steel chain slings shall be
performed by a competent person designated by the employer, and shall
include a thorough inspection for wear, defective welds, deformation and
increase in length. Where such defects or deterioration are present, the
sling shall be immediately removed from service.
(4) Proof testing. The employer shall ensure that before use, each
new, repaired, or reconditioned alloy steel chain sling, including all
welded components in the sling assembly, shall be proof tested by the
sling manufacturer or equivalent entity, in accordance with paragraph
5.2 of the American Society of Testing and Materials Specification A391-
65, which is incorporated by reference as specified in Sec. 1910.6
(ANSI G61.1- 1968). The employer shall retain a certificate of the proof
test and shall make it available for examination.
(5) Sling use. Alloy steel chain slings shall not be used with loads
in excess of the rated capacities prescribed in Table N-184-1. Slings
not included in this table shall be used only in accordance with the
manufacturer's recommendations.
(6) Safe operating temperatures. Alloy steel chain slings shall be
permanently removed from service if they are heated above 1000 [deg]F.
When exposed to service temperatures in excess of 600 [deg]F, maximum
working load limits permitted in Table N-184-1 shall be reduced in
accordance with the chain or sling manufacturer's recommendations.
(7) Repairing and reconditioning alloy steel chain slings. (i) Worn
or damaged alloy steel chain slings or attachments shall not be used
until repaired. When
[[Page 582]]
welding or heat testing is performed, slings shall not be used unless
repaired, reconditioned and proof tested by the sling manufacturer or an
equivalent entity.
(ii) Mechanical coupling links or low carbon steel repair links
shall not be used to repair broken lengths of chain.
(8) Effects of wear. If the chain size at any point of any link is
less than that stated in Table N-184-2, the sling shall be removed from
service.
(9) Deformed attachments. (i) Alloy steel chain slings with cracked
or deformed master links, coupling links or other components shall be
removed from service.
Table N-184-1--Rated Capacity (Working Load Limit), for Alloy Steel Chain Slings
Rated Capacity (Working Load Limit), Pounds
[Horizontal angles shown in parentheses]
----------------------------------------------------------------------------------------------------------------
Double sling vertical angle (1) Triple and quadruple sling (3)
Single branch --------------------------------- vertical angle (1)
Chain size, inches sling--90[deg] --------------------------------
loading 30[deg] 45[deg] 60[deg] 30[deg] 45[deg] 60[deg]
(60[deg]) (45[deg]) (30[deg]) (60[deg]) (45[deg]) (30[deg])
----------------------------------------------------------------------------------------------------------------
\1/4\......................... 3,250 5,650 4,550 3,250 8,400 6,800 4,900
\3/8\......................... 6,600 11,400 9,300 6,600 17,000 14,000 9,900
\1/2\......................... 11,250 19,500 15,900 11,250 29,000 24,000 17,000
\5/8\......................... 16,500 28,500 23,300 16,500 43,000 35,000 24,500
\3/4\......................... 23,000 39,800 32,500 23,000 59,500 48,500 34,500
\7/8\......................... 28,750 49,800 40,600 28,750 74,500 61,000 43,000
1............................. 38,750 67,100 5,800 38,750 101,000 82,000 58,000
1\1/8\........................ 44,500 77,000 63,000 44,500 115,500 94,500 66,500
1\1/4\........................ 57,500 99,500 61,000 57,500 149,000 121,500 86,000
1\3/8\........................ 67,000 116,000 94,000 67,000 174,000 141,000 100,500
1\1/2\........................ 80,000 138,000 112,900 80,000 207,000 169,000 119,500
1\3/4\........................ 100,000 172,000 140,000 100,000 258,000 210,000 150,000
----------------------------------------------------------------------------------------------------------------
(1) Rating of multileg slings adjusted for angle of loading measured as the included angle between the inclined
leg and the vertical as shown in Figure N-184-5.
(2) Rating of multileg slings adjusted for angle of loading between the inclined leg and the horizontal plane of
the load, as shown in Figure N-184-5.
(3) Quadruple sling rating is same as triple sling because normal lifting practice may not distribute load
uniformly to all 4 legs.
Table N-184-2--Minimum Allowable Chain Size At Any Point of Link
------------------------------------------------------------------------
Minimum allowable chain size,
Chain size, inches inches
------------------------------------------------------------------------
\1/4\ \13/64\
\3/8\ \19/64\
\1/2\ \25/64\
\5/8\ \31/64\
\3/4\ \19/32\
\7/8\ 4\5/64\
1 \13/16\
1\1/8\ \29/32\
1\1/4\ 1
1\3/8\ 1\3/32\
1\1/2\ 1\3/16\
1\3/4\ 1\13/32\
------------------------------------------------------------------------
(ii) Slings shall be removed from service if hooks are cracked, have
been opened more than 15 percent of the normal throat opening measured
at the narrowest point or twisted more than 10 degrees from the plane of
the unbent hook.
(f) Wire rope slings--(1) Sling use. Wire rope slings shall not be
used with loads in excess of the rated capacities shown in Tables N-184-
3 through N-184-14. Slings not included in these tables shall be used
only in accordance with the manufacturer's recommendations.
(2) Minimum sling lengths. (i) Cable laid and 6x19 and 6x37 slings
shall have a minimum clear length of wire rope 10 times the component
rope diameter between splices, sleeves or end fittings.
(ii) Braided slings shall have a minimum clear length of wire rope
40 times the component rope diameter between the loops or end fittings.
(iii) Cable laid grommets, strand laid grommets and endless slings
shall have a minimum circumferential length of 96 times their body
diameter.
(3) Safe operating temperatures. Fiber core wire rope slings of all
grades shall be permanently removed from service if they are exposed to
temperatures in excess of 200 [deg]F. When nonfiber core wire rope
slings of any grade are used at temperatures above 400 [deg]F or below
minus 60 [deg]F, recommendations of the sling manufacturer regarding use
at that temperature shall be followed.
[[Page 583]]
(4) End attachments. (i) Welding of end attachments, except covers
to thimbles, shall be performed prior to the assembly of the sling.
(ii) All welded end attachments shall not be used unless proof
tested by the manufacturer or equivalent entity at twice their rated
capacity prior to initial use. The employer shall retain a certificate
of the proof test, and make it available for examination.
Table N-184-3--Rated Capacities for Single Leg Slings
6x19 and 6x37 Classification Improved Plow Steel Grade Rope With Fiber Core (FC)
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
Vertical Choker Vertical basket \1\
Dia Constr ------------------------------------------------------------------------------------------
(inches) HT MS S HT MS S HT MS S
----------------------------------------------------------------------------------------------------------------
\1/4\ 6x19 0.49 0.51 0.55 0.37 0.38 0.41 0.99 1.0 1.1
\5/16\ 6x19 0.76 0.79 0.85 0.57 0.59 0.64 1.5 1.6 1.7
\3/8\ 6x19 1.1 1.1 1.2 0.80 0.85 0.91 2.1 2.2 2.4
\7/16\ 6x19 1.4 1.5 1.6 1.1 1.1 1.2 2.9 3.0 3.3
\1/2\ 6x19 1.8 2.0 2.1 1.4 1.5 12.6 3.7 3.9 4.3
\9/16\ 6x19 2.3 2.5 2.7 1.7 1.9 2.0 4.6 5.0 5.4
\5/8\ 6x19 2.8 3.1 3.3 2.1 2.3 2.5 5.6 6.2 6.7
\3/4\ 6x19 3.9 4.4 4.8 2.9 3.3 3.6 7.8 8.8 9.5
\7/8\ 6x19 5.1 5.9 6.4 3.9 4.5 4.8 10.0 12.0 13.0
1 6x19 6.7 7.7 8.4 5.0 5.8 6.3 13.0 15.0 17.0
1\1/8\ 6x19 8.4 9.5 10.0 6.3 7.1 7.9 17.0 19.0 21.0
1\1/4\ 6x37 9.8 11.0 12.0 7.4 8.3 9.2 20.0 22.0 25.0
1\3/8\ 6x37 12.0 13.0 15.0 8.9 10.0 11.0 24.0 27.0 30.0
1\1/2\ 6x37 14.0 16.0 15.0 10.0 12.0 13.0 28.0 32.0 35.0
1\5/8\ 6x37 16.0 18.0 21.0 12.0 14.0 15.0 33.0 27.0 41.0
1\3/4\ 6x37 19.0 21.0 24.0 14.0 16.0 18.0 38.0 43.0 48.0
2 6x37 25.0 28.0 31.0 18.0 21.0 23.0 49.0 55.0 62.0
----------------------------------------------------------------------------------------------------------------
HT = Hand Tucked Splice and Hidden Tuck Splice. For hidden tuck splice (IWRC) use values in HT columns.
MS = Mechanical Splice.
S = Swaged or Zinc Poured Socket.
\1\ These values only apply when the D/d ratio for HT slings is 10 or greater, and for MS and S slings is 20 or
greater where: D=Diameter of curvature around which the body of the sling is bent; d=Diameter of rope.
Table N-184-4--Rated Capacities for Single Leg Slings
6x19 and 6x37 Classification Improved Plow Steel Grade Rope With Independent Wire Rope Core (IWRC)
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
Vertical Choker Vertical basket \1\
Dia Constr ------------------------------------------------------------------------------------------
(inches) HT MS S HT MS S HT MS S
----------------------------------------------------------------------------------------------------------------
\1/4\ 6x19 0.53 0.56 0.59 0.40 0.42 0.44 1.0 1.1 1.2
\5/16\ 6x19 0.81 0.87 0.92 0.61 0.65 0.69 1.6 1.7 1.8
\3/8\ 6x19 1.1 1.2 1.3 0.86 0.93 0.98 2.3 2.5 2.6
\7/16\ 6x19 1.5 1.7 1.8 1.2 1.3 1.3 3.1 3.4 3.5
\1/2\ 6x19 2.0 2.2 2.3 1.5 1.6 1.7 3.9 4.4 4.6
\9/16\ 6x19 2.5 2.7 2.9 1.8 2.1 2.2 4.9 5.5 5.8
\5/8\ 6x19 3.0 3.4 3.6 2.2 2.5 2.7 6.0 6.8 7.2
\3/4\ 6x19 4.2 4.9 5.1 3.1 3.6 3.8 8.4 9.7 10.0
\7/8\ 6x19 5.5 6.6 6.9 4.1 4.9 5.2 11.0 13.0 14.0
1 6x19 7.2 8.5 9.0 5.4 6.4 6.7 14.0 17.0 18.0
1\1/8\ 6x19 9.0 10.0 11.0 6.8 7.8 8.5 18.0 21.0 23.0
1\1/4\ 6x37 10.0 12.0 13.0 7.9 9.2 9.9 21.0 24.0 26.0
1\3/8\ 6x37 13.0 15.0 16.0 9.6 11.0 12.0 25.0 29.0 32.0
1\1/2\ 6x37 15.0 17.0 19.0 11.0 13.0 14.0 30.0 35.0 38.0
1\5/8\ 6x37 18.0 20.0 22.0 13.0 15.0 17.0 35.0 41.0 44.0
1\3/4\ 6x37 20.0 24.0 26.0 15.0 18.0 19.0 41.0 47.0 51.0
2 6x37 26.0 30.0 33.0 20.0 23.0 25.0 53.0 61.0 66.0
----------------------------------------------------------------------------------------------------------------
HT = Hand Tucked Splice. For hidden tuck splice (IWRC) use Table I values in HT column.
MS = Mechanical Splice.
S = Swaged or Zinc Poured Socket.
\1\ These values only apply when the D/d ratio for HT slings is 10 or greater, and for MS and S Slings is 20 or
greater where: D=Diameter of curvature around which the body of the sling is bent; d=Diameter of rope.
[[Page 584]]
Table N-184-5--Rated Capacities for Single Leg Slings
Cable Laid Rope--Mechanical Splice Only
7x7x7&7x19 Constructions Galvanized Aircraft Grade Rope
7x6x19 IWRC Construction Improved Plow Steel Grade Rope
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
Vertical
Dia (inches) Constr Vertical Choker basket \1\
----------------------------------------------------------------------------------------------------------------
\1/4\..................................... 7x7x7........................... 0.50 0.38 1.0
\3/8\..................................... 7x7x7........................... 1.1 0.81 2.0
\1/2\..................................... 7x7x7........................... 1.8 1.4 3.7
\5/8\..................................... 7x7x7........................... 2.8 2.1 5.5
\3/4\..................................... 7x7x7........................... 3.8 2.9 7.6
\5/8\..................................... 7x7x19.......................... 2.9 2.2 5.8
\3/4\..................................... 7x7x19.......................... 4.1 3.0 8.1
\7/8\..................................... 7x7x19.......................... 5.4 4.0 11.0
1......................................... 7x7x19.......................... 6.9 5.1 14.0
1\1/8\.................................... 7x7x19.......................... 8.2 6.2 16.0
1\1/4\.................................... 7x7x19.......................... 9.9 7.4 20.0
\3/4\..................................... 7x6x19 IWRC..................... 3.8 2.8 7.6
\7/8\..................................... 7x6x19 IWRC..................... 5.0 3.8 10.0
1......................................... 7x6x19 IWRC..................... 6.4 4.8 13.0
1\1/8\.................................... 7x6x19 IWRC..................... 7.7 5.8 15.0
1\1/4\.................................... 7x6x19 IWRC..................... 9.2 6.9 18.0
1\5/16\................................... 7x6x19 IWRC..................... 10.0 7.5 20.0
1\3/8\.................................... 7x6x19 IWRC..................... 11.0 8.2 22.0
1\1/2\.................................... 7x6x19 IWRC..................... 13.0 9.6 26.0
----------------------------------------------------------------------------------------------------------------
\1\ These values only apply when the D/d ratio is 10 or greater where: D=Diameter of curvature around which the
body of the sling is bent; d=Diameter of rope.
Table N-184-6--Rated Capacities for Single Leg Slings
8-Part and 6-Part Braided Rope
6x7 and 6x19 Construction Improved Plow Steel Grade Rope
7x7 Construction Galvanized Aircraft Grade Rope
----------------------------------------------------------------------------------------------------------------
Component ropes Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
Vertical Choker Basket, vertical
------------------------------------ to 30[deg] \1\
Diameter (inches) Constr -----------------
8-Part 6-Part 8-Part 6-Part 8-Part 6-Part
----------------------------------------------------------------------------------------------------------------
\3/32\........................................... 6x7 0.42 0.32 0.32 0.24 0.74 0.55
\1/8\............................................ 6x7 0.75 0.57 0.57 0.42 1.3 0.98
\3/16\........................................... 6x7 1.7 1.3 1.3 0.94 2.9 2.2
\3/32\........................................... 7x7 0.51 0.39 0.38 0.29 0.89 0.67
\1/8\............................................ 7x7 0.95 0.7 0.71 0.53 1.6 1.2
\3/16\........................................... 7x7 2.1 1.5 1.5 1.2 3.6 2.7
\3/16\........................................... 6x19 1.7 1.3 1.3 0.98 3.0 2.2
\1/4\............................................ 6x19 3.1 2.3 2.3 1.7 5.3 4.0
\5/16\........................................... 6x19 4.8 3.6 3.6 2.7 8.3 6.2
\3/8\............................................ 6x19 6.8 5.1 5.1 3.8 12.0 8.9
\7/16\........................................... 6x19 9.3 6.9 6.9 5.2 16.0 12.0
\1/2\............................................ 6x19 12.0 9.0 9.0 6.7 21.0 15.0
\9/16\........................................... 6x19 15.0 11.0 11.0 8.5 26.0 20.0
\5/8\............................................ 6x19 19.0 14.0 14.0 10.0 32.0 24.0
\3/4\............................................ 6x19 27.0 20.0 20.0 15.0 46.0 35.0
\7/8\............................................ 6x19 36.0 27.0 27.0 20.0 62.0 47.0
1................................................ 6x19 47.0 35.0 35.0 26.0 81.0 61.0
----------------------------------------------------------------------------------------------------------------
\1\ These values only apply when the D/d ratio is 20 or greater where: D=Diameter of curvature around which the
body of the sling is bent; d=Diameter of component rope.
[[Page 585]]
Table N-184-7--Rated Capacities for 2-Leg and 3-Leg Bridle Slings
6x19 and 6x37 Classification Improved Plow Steel Grade Rope With Fiber Core (FC)
[Horizontal angles shown in parentheses]
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
2-Leg bridle slings 3-Leg bridle slings
-----------------------------------------------------------------------------------------------
Dia 30[deg] 45[deg] angle 60[deg] 30[deg] 45[deg] angle 60[deg]
(in.) Constr (60[deg]) ---------------- (30[deg]) (60[deg]) ---------------- (30[deg])
---------------- -------------------------------- ---------------
HT MS HT MS HT MS HT MS HT MS HT MS
----------------------------------------------------------------------------------------------------------------
\1/4\ 6x19 0.85 0.83 0.70 0.72 0.49 0.51 1.3 1.3 1.0 1.1 0.74 0.76
\5/16\ 6x19 1.3 1.4 1.1 1.1 0.76 0.79 2.0 2.0 1.6 1.7 1.1 1.2
\3/8\ 6x19 1.8 1.9 1.5 1.6 1.1 1.1 2.8 2.9 2.3 2.4 1.6 1.7
\7/16\ 6x19 2.5 2.6 2.0 2.2 1.4 1.5 3.7 4.0 3.0 3.2 2.1 2.3
\1/2\ 6x19 3.2 3.4 2.6 2.8 1.8 2.0 4.8 5.1 3.9 4.2 2.8 3.0
\9/16\ 6x19 4.0 4.3 3.2 3.5 2.3 2.5 6.0 6.5 4.9 5.3 3.4 3.7
\5/8\ 6x19 4.8 5.3 4.0 4.4 2.8 3.1 7.3 8.0 5.9 6.5 4.2 4.6
\3/4\ 6x19 6.8 7.6 5.5 6.2 3.9 4.4 10.0 11.0 8.3 9.3 5.8 6.6
\7/8\ 6x19 8.9 10.0 7.3 8.4 5.1 5.9 13.0 15.0 11.0 13.0 7.7 8.9
1 6x19 11.0 13.0 9.4 11.0 6.7 7.7 17.0 20.0 14.0 16.0 10.0 11.0
1\1/8\ 6x19 14.0 16.0 12.0 13.0 8.4 9.3 22.0 24.0 18.0 20.0 13.0 14.0
1\1/4\ 6x37 17.0 19.0 14.0 16.0 9.8 11.0 25.0 29.0 21.0 23.0 15.0 17.0
1\3/8\ 6x37 20.0 23.0 17.0 19.0 12.0 13.0 31.0 35.0 25.0 28.0 18.0 20.0
1\1/2\ 6x37 24.0 27.0 20.0 22.0 14.0 16.0 36.0 41.0 30.0 33.0 21.0 24.0
1\5/8\ 6x37 28.0 32.0 23.0 26.0 16.0 18.0 43.0 48.0 35.0 39.0 25.0 28.0
1\3/4\ 6x37 33.0 37.0 27.0 30.0 19.0 21.0 49.0 56.0 40.0 45.0 28.0 32.0
2 6x37 43.0 48.0 35.0 39.0 25.0 28.0 64.0 72.0 52.0 59.0 37.0 41.0
----------------------------------------------------------------------------------------------------------------
HT=Hand Tucked Splice. MS=Mechanical Splice.
Table N-184-8--Rated Capacities for 2-Leg and 3-Leg Bridle Slings
6x19 and 6x37 Classification Improved Plow Steel Grade Rope With Independent Wire Rope Core (IWRC)
[Horizontal angles shown in parentheses]
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
2-Leg bridle slings 3-Leg bridle slings
-----------------------------------------------------------------------------------------------
Dia 30[deg] 45[deg] angle 60[deg] 30[deg] 45[deg] angle 60[deg]
(in.) Constr (60[deg]) ---------------- (30[deg]) (60[deg]) ---------------- (30[deg])
---------------- -------------------------------- ---------------
HT MS HT MS HT MS HT MS HT MS HT MS
----------------------------------------------------------------------------------------------------------------
\1/4\ 6x19 0.92 0.97 0.75 0.79 0.53 0.56 1.4 1.4 1.1 1.2 0.79 0.84
\5/16\ 6x19 1.4 1.5 1.1 1.2 0.81 0.87 2.1 2.3 1.7 1.8 1.2 1.3
\3/8\ 6x19 2.0 2.1 1.6 1.8 1.1 1.2 3.0 3.2 2.4 2.6 1.7 1.9
\7/16\ 6x19 2.7 2.9 2.2 2.4 1.5 1.7 4.0 4.4 3.3 3.6 2.3 2.5
\1/2\ 6x19 3.4 3.8 2.8 3.1 2.0 2.2 5.1 5.7 4.2 4.6 3.0 3.3
\9/16\ 6x19 4.3 4.8 3.5 3.9 2.5 2.7 6.4 7.1 5.2 5.8 3.7 4.1
\5/8\ 6x19 5.2 5.9 4.2 4.8 3.0 3.4 7.8 8.8 6.4 7.2 4.5 5.1
\3/4\ 6x19 7.3 8.4 5.9 6.9 4.2 4.9 11.0 13.0 8.9 10.0 6.3 7.3
\7/8\ 6x19 9.6 11.0 7.8 9.3 5.5 6.6 14.0 17.0 12.0 14.0 8.3 9.9
1 6x19 12.0 15.0 10.0 12.0 7.2 8.5 19.0 22.0 15.0 18.0 11.0 13.0
1\1/8\ 6x19 16.0 18.0 13.0 15.0 9.0 10.0 23.0 27.0 19.0 22.0 13.0 16.0
1\1/4\ 6x37 18.0 21.0 15.0 17.0 10.0 12.0 27.0 32.0 22.0 26.0 16.0 18.0
1\3/8\ 6x37 22.0 25.0 18.0 21.0 13.0 15.0 33.0 38.0 27.0 31.0 19.0 22.0
1\1/2\ 6x37 26.0 30.0 21.0 25.0 15.0 17.0 39.0 45.0 32.0 37.0 23.0 26.0
1\5/8\ 6x37 31.0 35.0 25.0 29.0 18.0 20.0 46.0 53.0 38.0 43.0 27.0 31.0
1\3/4\ 6x37 35.0 41.0 29.0 33.0 20.0 24.0 53.0 61.0 43.0 50.0 31.0 35.0
2 6x37 46.0 53.0 37.0 43.0 26.0 30.0 68.0 79.0 56.0 65.0 40.0 46.0
----------------------------------------------------------------------------------------------------------------
HT=Hand Tucked Splice. MS=Mechanical Splice.
Table N-184-9--Rated Capacities for 2-Leg and 3-Leg Bridle Slings
Cable Laid Rope--Mechanical Splice Only
7x7x7 and 7x7x19 Constructions Galvanized Aircraft Grade Rope
7x6x19 IWRC Construction Improved Plow Steel Grade Rope
[Horizontal angles shown in parentheses]
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
2-Leg bridle sling 3-Leg bridle sling
-------------------------------------------------------------
Dia (inches) Constr 30[deg] 45[deg] 60[deg] 30[deg] 45[deg] 60[deg]
(60[deg]) angle (30[deg]) (60[deg]) angle (30[deg])
----------------------------------------------------------------------------------------------------------------
\1/4\.......................... 7x7x7............ 0.87 0.71 0.50 1.3 1.1 0.75
[[Page 586]]
\3/8\.......................... 7x7x7............ 1.9 1.5 1.1 2.8 2.3 1.6
\1/2\.......................... 7x7x7............ 3.2 2.6 1.8 4.8 3.9 2.8
\5/8\.......................... 7x7x7............ 4.8 3.9 2.8 7.2 5.9 4.2
\3/4\.......................... 7x7x7............ 6.6 5.4 3.8 9.9 8.1 3.7
\5/8\.......................... 7x7x19........... 5.0 4.1 2.9 7.5 6.1 4.3
\3/4\.......................... 7x7x19........... 7.0 5.7 4.1 10.0 8.6 6.1
\7/8\.......................... 7x7x19........... 9.3 7.6 5.4 14.0 11.0 8.1
1.............................. 7x7x19........... 12.0 9.7 6.9 18.0 14.0 10.0
1\1/8\......................... 7x7x19........... 14.0 12.0 8.2 21.0 17.0 12.0
1\1/4\......................... 7x7x19........... 17.0 14.0 9.9 26.0 21.0 15.0
\3/4\.......................... 7x6x19 IWRC...... 6.6 5.4 3.8 9.9 8.0 5.7
\7/8\.......................... 7x6x19 IWRC...... 8.7 7.1 5.0 13.0 11.0 7.5
1.............................. 7x6x19 IWRC...... 11.0 9.0 6.4 17.0 13.0 9.6
1\1/8\......................... 7x6x19 IWRC...... 13.0 11.0 7.7 20.0 16.0 11.0
1\1/4\......................... 7x6x19 IWRC...... 16.0 13.0 9.2 24.0 20.0 14.0
1\5/16\........................ 7x6x19 IWRC...... 17.0 14.0 10.0 26.0 21.0 15.0
1\3/8\......................... 7x6x19 IWRC...... 19.0 15.0 11.0 28.0 23.0 16.0
1\1/2\......................... 7x6x19 IWRC...... 22.0 18.0 13.0 33.0 27.0 19.0
----------------------------------------------------------------------------------------------------------------
Table N-184-10--Rated Capacities for 2-Leg and 3-Leg Bridle Slings
8-Part and 6-Part Braided Rope
6x7 and 6x19 Construction Improved Plow Steel Grade Rope
7x7 Construction Galvanized Aircraft Grade Rope
[Horizontal angles shown in parentheses]
----------------------------------------------------------------------------------------------------------------
Rope Rated capacities, tons (2,000 lb)
----------------------------------------------------------------------------------------------------------------
2-Leg bridle slings 3-Leg bridle slings
------------------------------------------------------------------------------------------------
30[deg] 45[deg] angle 60[deg] 30[deg] 45[deg] angle 60[deg]
Dia Constr (60[deg]) ---------------- (30[deg]) (60[deg]) ------------------- (30[deg])
(in.) ---------------- -------------------------------- -------------
8-Part 6-Part 8-Part 6-Part 8- 6-
8-Part 6-Part 8-Part 6-Part 8-Part 6-Part Part Part
----------------------------------------------------------------------------------------------------------------
\3/32\ 6x7 0.74 0.55 0.60 0.45 0.42 0.32 1.1 0.83 0.90 0.68 0.64 0.48
\1/8\ 6x7 1.3 0.98 1.1 0.80 0.76 0.57 2.0 1.5 1.6 1.2 1.1 0.85
\3/16\ 6x7 2.9 2.2 2.4 1.8 1.7 1.3 4.4 3.3 3.6 2.7 2.5 1.9
\3/32\ 7x7 0.89 0.67 0.72 0.55 0.51 0.39 1.3 1.0 1.1 0.82 0.77 0.58
\1/8\ 7x7 1.6 1.2 1.3 1.0 0.95 0.71 2.5 1.8 2.0 1.5 1.4 1.1
\3/16\ 7x7 3.6 2.7 2.9 2.2 2.1 1.5 5.4 4.0 4.4 3.3 3.1 2.3
\3/16\ 6x19 3.0 2.2 2.4 1.8 1.7 1.3 4.5 3.4 3.7 2.8 2.6 1.9
\1/4\ 6x19 5.3 4.0 4.3 3.2 3.1 2.3 8.0 6.0 6.5 4.9 4.6 3.4
\5/16\ 6x19 8.3 6.2 6.7 5.0 4.8 3.6 12.0 9.3 10.0 7.6 7.1 5.4
\3/8\ 6x19 12.0 8.9 9.7 7.2 6.8 5.1 18.0 13.0 14.0 11.0 10.0 7.7
\7/16\ 6x19 16.0 12.0 13.0 9.8 9.3 6.9 24.0 18.0 20.0 15.0 14.0 10.0
\1/2\ 6x19 21.0 15.0 17.0 13.0 12.0 9.0 31.0 23.0 25.0 19.0 18.0 13.0
\9/16\ 6x19 26.0 20.0 21.0 16.0 15.0 11.0 39.0 29.0 32.0 24.0 23.0 17.0
\5/8\ 6x19 32.0 24.0 26.0 20.0 10.0 14.0 48.0 36.0 40.0 30.0 28.0 21.0
\3/4\ 6x19 46.0 35.0 38.0 28.0 27.0 20.0 69.0 52.0 56.0 42.0 40.0 30.0
\7/8\ 6x19 62.0 47.0 51.0 38.0 36.0 27.0 94.0 70.0 76.0 57.0 54.0 40.0
1 6x19 81.0 61.0 66.0 50.0 47.0 35.0 122.0 91.0 99.0 74.0 70.0 53.0
----------------------------------------------------------------------------------------------------------------
[[Page 587]]
Table N-184-11--Rated Capacities for Strand Laid Grommet--Hand Tucked
Improved Plow Steel Grade Rope
------------------------------------------------------------------------
Rope body Rated capacities, tons (2,000 lb)
------------------------------------------------------------------------
Vertical
Dia (inches) Constr Vertical Choker basket \1\
------------------------------------------------------------------------
\1/4\ 7x19 0.85 0.64 1.7
\5/16\ 7x19 1.3 1.0 2.6
\3/8\ 7x19 1.9 1.4 3.8
\7/16\ 7x19 2.6 1.9 5.2
\1/2\ 7x19 3.3 2.5 6.7
\9/16\ 7x19 4.2 3.1 8.4
\5/8\ 7x19 5.2 3.9 10.0
\3/4\ 7x19 7.4 5.6 15.0
\7/8\ 7x19 10.0 7.5 20.0
1 7x19 13.0 9.7 26.0
1\1/8\ 7x19 16.0 12.0 32.0
1\1/4\ 7x37 18.0 14.0 37.0
1\3/8\ 7x37 22.0 16.0 44.0
1\1/2\ 7x37 26.0 19.0 52.0
------------------------------------------------------------------------
\1\ These values only apply when the D/d ratio is 5 or greater where:
D=Diameter of curvature around which rope is bent. d=Diameter of rope
body.
Table N-184-12--Rated Capacities for Cable Laid Grommet--Hand Tucked
7x6x7 and 7x6x19 Constructions Improved Plow Steel Grade Rope
7x7x7 Construction Galvanized Aircraft Grade Rope
------------------------------------------------------------------------
Cable body Rated capacities, tons (2,000 lb)
------------------------------------------------------------------------
Vertical
Dia (inches) Constr Vertical Choker basket \1\
------------------------------------------------------------------------
\3/8\ 7x6x7 1.3 0.95 2.5
\9/16\ 7x6x7 2.8 2.1 5.6
\5/8\ 7x6x7 3.8 2.8 7.6
\3/8\ 7x7x7 1.6 1.2 3.2
\9/16\ 7x7x7 3.5 2.6 6.9
\5/8\ 7x7x7 4.5 3.4 9.0
\5/8\ 7x6x19 3.9 3.0 7.9
\3/4\ 7x6x19 5.1 3.8 10.0
\15/16\ 7x6x19 7.9 5.9 16.0
1\1/8\ 7x6x19 11.0 8.4 22.0
1\5/16\ 7x6x19 15.0 11.0 30.0
1\1/2\ 7x6x19 19.0 14.0 39.0
1\11/16\ 7x6x19 24.0 18.0 49.0
1\7/8\ 7x6x19 30.0 22.0 60.0
2\1/4\ 7x6x19 42.0 31.0 84.0
2\5/8\ 7x6x19 56.0 42.0 112.0
------------------------------------------------------------------------
\1\ These values only apply when the D/d ratio is 5 or greater where:
D=Diameter of curvature around which cable body is bent. d=Diameter of
cable body.
Table N-184-13--Rated Capacities for Strand Laid Endless Slings--
Mechanical Joint
Improved Plow Steel Grade Rope
------------------------------------------------------------------------
Rope body Rated capacities, tons (2,000 lb)
------------------------------------------------------------------------
Vertical
Dia (inches) Constr Vertical Choker basket \1\
------------------------------------------------------------------------
\1/4\ \2\ 6x19 0.92 0.69 1.8
\3/8\ \2\ 6x19 2.0 1.5 4.1
\1/2\ \2\ 6x19 3.6 2.7 7.2
\5/8\ \2\ 6x19 5.6 4.2 11.0
\3/4\ \2\ 6x19 8.0 6.0 16.0
\7/8\ \2\ 6x19 11.0 8.1 21.0
1 \2\ 6x19 14.0 10.0 28.0
1\1/8\ \2\ 6x19 18.0 13.0 35.0
1\1/4\ \2\ 6x37 21.0 15.0 41.0
1\3/8\ \2\ 6x37 25.0 19.0 50.0
1\1/2\ \2\ 6x37 29.0 22.0 59.0
------------------------------------------------------------------------
\1\ These values only apply when the D/d ratio is 5 or greater where:
D=Diameter of curvature around which rope is bent. d=Diameter of rope
body.
\2\ IWRC.
Table N-184-14--Rated Capacities for Cable Laid Endless Slings--
Mechanical Joint
7x7x7 and 7x7x19 Constructions Galvanized Aircraft Grade Rope
7x6x19 IWRC Construction Improved Plow Steel Grade Rope
------------------------------------------------------------------------
Cable body Rated capacities, tons (2,000 lb)
------------------------------------------------------------------------
Vertical
Dia (inches) Constr Vertical Choker basket \1\
------------------------------------------------------------------------
\1/4\ 7x7x7 0.83 0.62 1.6
\3/8\ 7x7x7 1.8 1.3 3.5
\1/2\ 7x7x7 3.0 2.3 6.1
\5/8\ 7x7x7 4.5 3.4 9.1
\3/4\ 7x7x7 6.3 4.7 12.0
\5/8\ 7x7x19 4.7 3.5 9.5
\3/4\ 7x7x19 6.7 5.0 13.0
\7/8\ 7x7x19 8.9 6.6 18.0
1 7x7x19 11.0 8.5 22.0
1\1/8\ 7x7x19 14.0 10.0 28.0
1\1/4\ 7x7x19 17.0 12.0 33.0
\3/4\ \2\ 7x6x19 6.2 4.7 12.0
\7/8\ \2\ 7x6x19 8.3 6.2 16.0
1 \2\ 7x6x19 10.0 7.9 21.0
1\1/8\ \2\ 7x6x19 13.0 9.7 26.0
1\1/4\ \2\ 7x6x19 16.0 12.0 31.0
1\3/8\ \2\ 7x6x19 18.0 14.0 37.0
1\1/2\ \2\ 7x6x19 22.0 16.0 43.0
------------------------------------------------------------------------
\1\ These values only apply when the D/d value is 5 or greater where:
D=Diameter of curvature around which cable body is bent. d=Diameter of
cable body.
\2\ IWRC.
(5) Removal from service. Wire rope slings shall be immediately
removed from service if any of the following conditions are present:
(i) Ten randomly distributed broken wires in one rope lay, or five
broken wires in one strand in one rope lay.
(ii) Wear or scraping of one-third the original diameter of outside
individual wires.
(iii) Kinking, crushing, bird caging or any other damage resulting
in distortion of the wire rope structure.
(iv) Evidence of heat damage.
(v) End attachments that are cracked, deformed or worn.
[[Page 588]]
(vi) Hooks that have been opened more than 15 percent of the normal
throat opening measured at the narrowest point or twisted more than 10
degrees from the plane of the unbent hook.
(vii) Corrosion of the rope or end attachments.
(g) Metal mesh slings--(1) Sling marking. Each metal mesh sling
shall have permanently affixed to it a durable marking that states the
rated capacity for vertical basket hitch and choker hitch loadings.
(2) Handles. Handles shall have a rated capacity at least equal to
the metal fabric and exhibit no deformation after proof testing.
(3) Attachments of handles to fabric. The fabric and handles shall
be joined so that:
(i) The rated capacity of the sling is not reduced.
(ii) The load is evenly distributed across the width of the fabric.
(iii) Sharp edges will not damage the fabric.
(4) Sling coatings. Coatings which diminish the rated capacity of a
sling shall not be applied.
(5) Sling testing. All new and repaired metal mesh slings, including
handles, shall not be used unless proof tested by the manufacturer or
equivalent entity at a minimum of 1\1/2\ times their rated capacity.
Elastomer impregnated slings shall be proof tested before coating.
(6) Proper use of metal mesh slings. Metal mesh slings shall not be
used to lift loads in excess of their rated capacities as prescribed in
Table N-184-15. Slings not included in this table shall be used only in
accordance with the manufacturer's recommendations.
(7) Safe operating temperatures. Metal mesh slings which are not
impregnated with elastomers may be used in a temperature range from
minus 20 [deg]F to plus 550 [deg]F without decreasing the working load
limit. Metal mesh slings impregnated with polyvinyl chloride or neoprene
may be used only in a temperature range from zero degrees to plus 200
[deg]F. For operations outside these temperature ranges or for metal
mesh slings impregnated with other materials, the sling manufacturer's
recommendations shall be followed.
(8) Repairs. (i) Metal mesh slings which are repaired shall not be
used unless repaired by a metal mesh sling manufacturer or an equivalent
entity.
(ii) Once repaired, each sling shall be permanently marked or
tagged, or a written record maintained, to indicate the date and nature
of the repairs and the person or organization that performed the
repairs. Records of repairs shall be made available for examination.
(9) Removal from service. Metal mesh slings shall be immediately
removed from service if any of the following conditions are present:
(i) A broken weld or broken brazed joint along the sling edge.
(ii) Reduction in wire diameter of 25 per cent due to abrasion or 15
per cent due to corrosion.
(iii) Lack of flexibility due to distortion of the fabric.
Table N-184-15--Rated Capacities
Carbon Steel and Stainless Steel Metal Mesh Slings
[Horizontal angles shown in parentheses]
------------------------------------------------------------------------
Effect of angle on rated capacities
Sling in basket hitch
width in Vertical Vertical --------------------------------------
inches or choker basket 30[deg] 45[deg] 60[deg]
(60[deg]) (45[deg]) (30[deg])
------------------------------------------------------------------------
Heavy Duty-10 Ga 35 Spirals/Ft of sling width
------------------------------------------------------------------------
2 1,500 3,000 2,600 2,100 1,500
3 2,700 5,400 4,700 3,800 2,700
4 4,000 8,000 6,900 5,600 4,000
6 6,000 12,000 10,400 8,400 6,000
8 8,000 16,000 13,800 11,300 8,000
10 10,000 20,000 17,000 14,100 10,000
12 12,000 24,000 20,700 16,900 12,000
14 14,000 28,000 24,200 19,700 14,000
16 16,000 32,000 27,700 22,600 16,000
18 18,000 36,000 31,100 25,400 18,000
20 20,000 40,000 34,600 28,200 20,000
------------------------------------------------------------------------
Medium Duty-12 Ga 43 Spirals/Ft of sling width
------------------------------------------------------------------------
2 1,350 2,700 2,300 1,900 1,400
3 2,000 4,000 3,500 2,800 2,000
4 2,700 5,400 4,700 3,800 2,700
6 4,500 9,000 7,800 6,400 4,500
8 6,000 12,000 10,400 8,500 6,000
10 7,500 15,000 13,000 10,600 7,500
12 9,000 18,000 15,600 12,700 9,000
14 10,500 21,000 18,200 14,800 10,500
16 12,000 24,000 20,800 17,000 12,000
18 13,500 27,000 23,400 19,100 13,500
20 15,000 30,000 26,000 21,200 15,000
------------------------------------------------------------------------
Light Duty-14 Ga 59 Spirals/Ft of sling width
------------------------------------------------------------------------
2 900 1,800 1,600 1,300 900
3 1,400 2,800 2,400 2,000 1,400
4 2,000 4,000 3,500 2,800 2,000
6 3,000 6,000 5,200 4,200 3,000
8 4,000 8,000 6,900 5,700 4,000
10 5,000 10,000 8,600 7,100 5,000
[[Page 589]]
12 6,000 12,000 10,400 8,500 6,000
14 7,000 14,000 12,100 9,900 7,000
16 8,000 16,000 13,900 11,300 8,000
18 9,000 18,000 15,600 12,700 9,000
20 10,000 20,000 17,300 14,100 10,000
------------------------------------------------------------------------
(iv) Distortion of the female handle so that the depth of the slot
is increased more than 10 per cent.
(v) Distortion of either handle so that the width of the eye is
decreased more than 10 per cent.
(vi) A 15 percent reduction of the original cross sectional area of
metal at any point around the handle eye.
(vii) Distortion of either handle out of its plane.
(h) Natural and synthetic fiber rope slings--(1) Sling use. (i)
Fiber rope slings made from conventional three strand construction fiber
rope shall not be used with loads in excess of the rated capacities
prescribed in Tables N-184-16 through N-184-19.
(ii) Fiber rope slings shall have a diameter of curvature meeting at
least the minimums specified in Figs. N-184-4 and N-184-5.
(iii) Slings not included in these tables shall be used only in
accordance with the manufacturer's recommendations.
[[Page 590]]
[GRAPHIC] [TIFF OMITTED] TC27OC91.048
[[Page 591]]
[GRAPHIC] [TIFF OMITTED] TC27OC91.049
[[Page 592]]
Table N-184-16--Manila Rope Slings
[Angle of rope to vertical shown in parentheses]
--------------------------------------------------------------------------------------------------------------------------------------------------------
Eye and eye sling Endless sling
Rope Nominal -------------------------------------------------------------------------------------------------------------------------------------
dia. wt. per Basket hitch; Angle of rope to horizontal Basket hitch; Angle of rope to horizontal
nominal 100 ft Vertical Choker ----------------------------------------------- Vertical Choker --------------------------------------------
in in hitch hitch 90[deg] 60[deg] 45[deg] 30[deg] hitch hitch 90[deg] 60[deg] 45[deg] 30[deg]
inches pounds (0[deg]) (30[deg]) (45[deg]) (60[deg]) (0[deg]) (30[deg]) (45[deg]) (60[deg])
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1/2\ 7.5 480 240 960 830 680 480 865 430 1,730 1,500 1,220 865
\9/16\ 10.4 620 310 1,240 1,070 875 620 1,120 560 2,230 1,930 1,580 1,120
\5/8\ 13.3 790 395 1,580 1,370 1,120 790 1,420 710 2,840 2,460 2,010 1,420
\3/4\ 16.7 970 485 1,940 1,680 1,370 970 1,750 875 3,490 3,020 2,470 1,750
\13/16\ 19.5 1,170 585 2,340 2,030 1,650 1,170 2,110 1,050 4,210 3,650 2,980 2,110
\7/8\ 22.5 1,390 695 2,780 2,410 1,970 1,390 2,500 1,250 5,000 4,330 3,540 2,500
1 27.0 1,620 810 3,240 2,810 2,290 1,620 2,920 1,460 5,830 5,050 4,120 2,920
1\1/16\ 31.3 1,890 945 3,780 3,270 2,670 1,890 3,400 1,700 6,800 5,890 4,810 3,400
1\1/8\ 36.0 2,160 1,080 4,320 3,740 3,050 2,160 3,890 1,940 7,780 6,730 5,500 3,890
1\1/4\ 41.7 2,430 1,220 4,860 4,210 3,440 2,430 4,370 2,190 8,750 7,580 6,190 4,370
1\5/16\ 47.9 2,700 1,350 5,400 4,680 3,820 2,700 4,860 2,430 9,720 8,420 6,870 4,860
1\1/2\ 59.9 3,330 1,670 6,660 5,770 4,710 3,330 5,990 3,000 12,000 10,400 8,480 5,990
1\5/8\ 74.6 4,050 2,030 8,100 7,010 5,730 4,050 7,290 3,650 14,600 12,600 10,300 7,290
1\3/4\ 89.3 4,770 2,390 9,540 8,260 6,740 4,770 8,590 4,290 17,200 14,900 12,100 8,590
2 107.5 5,580 2,790 11,200 9,660 7,890 5,580 10,000 5,020 20,100 17,400 14,200 10,000
2\1/8\ 125.0 6,480 3,240 13,000 11,200 9,160 6,480 11,700 5,830 23,300 2,0,200 16,500 11,700
2\1/4\ 146.0 7,380 3,690 14,800 12,800 10,400 7,380 13,300 6,640 26,600 23,000 18,800 13,300
2\1/2\ 166.7 8,370 4,190 16,700 14,500 11,800 8,370 15,100 7,530 30,100 26,100 21,300 15,100
2\5/8\ 190.8 9,360 4,680 18,700 16,200 13,200 9,360 16,800 8,420 33,700 29,200 23,800 16,800
--------------------------------------------------------------------------------------------------------------------------------------------------------
See Figs. N-184-4 and N-184-5 for sling configuration descriptions.
Table N-184-17--Nylon Rope Slings
[Angle of rope to vertical shown in parentheses]
--------------------------------------------------------------------------------------------------------------------------------------------------------
Eye and eye sling Endless sling
Rope Nominal -------------------------------------------------------------------------------------------------------------------------------------
dia. wt. per Basket hitch; Angle of rope to horizontal Basket hitch; Angle of rope to horizontal
nominal 100 ft Vertical Choker ----------------------------------------------- Vertical Choker --------------------------------------------
in in hitch hitch 90[deg] 60[deg] 45[deg] 30[deg] hitch hitch 90[deg] 60[deg] 45[deg] 30[deg]
inches pounds (0[deg]) (30[deg]) (45[deg]) (60[deg]) (0[deg]) (30[deg]) (45[deg]) (60[deg])
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1/2\ 6.5 635 320 1,270 1,100 900 635 1,140 570 2,290 1,980 1,620 1,140
\9/16\ 8.3 790 395 1,580 1,370 1,120 790 1,420 710 2,840 2,460 2,010 1,420
\5/8\ 10.5 1,030 515 2,060 1,780 1,460 1,030 1,850 925 3,710 3,210 2,620 1,850
\3/4\ 14.5 1,410 705 2,820 2,440 1,990 1,410 2,540 1,270 5,080 4,400 3,590 2,540
\13/16\ 17.0 1,680 840 3,360 2,910 2,380 1,680 3,020 1,510 6,050 5,240 4,280 3,020
\7/8\ 20.0 1,980 990 3,960 3,430 2,800 1,980 3,560 1,780 7,130 6,170 5,040 3,560
1 26.0 2,480 1,240 4,960 4,300 3,510 2,480 4,460 2,230 8,930 7,730 6,310 4,460
1\1/16\ 29.0 2,850 1,430 5,700 4,940 4,030 2,850 5,130 2,570 10,300 8,890 7,260 5,130
1\1/8\ 34.0 3,270 1,640 6,540 5,660 4,620 3,270 5,890 2,940 11,800 10,200 8,330 5,890
1\1/4\ 40.0 3,710 1,860 7,420 6,430 5,250 3,710 6,680 3,340 13,400 11,600 9,450 6,680
1\5/16\ 45.0 4,260 2,130 8,520 7,380 6,020 4,260 7,670 3,830 15,300 13,300 10,800 7,670
[[Page 593]]
1\1/2\ 55.0 5,250 2,630 10,500 9,090 7,420 5,250 9,450 4,730 18,900 16,400 13,400 9,450
1\5/8\ 68.0 6,440 3,220 12,900 11,200 9,110 6,440 11,600 5,800 23,200 20,100 16,400 11,600
1\3/4\ 83.0 7,720 3,860 15,400 13,400 10,900 7,720 13,900 6,950 27,800 24,100 19,700 13,900
2 95.0 9,110 4,560 18,200 15,800 12,900 9,110 16,400 8,200 32,800 28,400 23,200 16,400
2\1/8\ 109.0 10,500 5,250 21,000 18,200 14,800 10,500 18,900 9,450 37,800 32,700 26,700 18,900
2\1/4\ 129.0 12,400 6,200 24,800 21,500 17,500 12,400 22,300 11,200 44,600 38,700 31,600 22,300
2\1/2\ 149.0 13,900 6,950 27,800 24,100 19,700 13,900 25,000 12,500 50,000 43,300 35,400 25,000
2\5/8\ 168.0 16,000 8,000 32,000 27,700 22,600 16,000 28,800 14,400 57,600 49,900 40,700 28,800
--------------------------------------------------------------------------------------------------------------------------------------------------------
See Figs. N-184-4 and N-184-5 for sling configuration descriptions.
Table N-184-18--Polyester Rope Slings
[Angle of rope to vertical shown in parentheses]
--------------------------------------------------------------------------------------------------------------------------------------------------------
Eye and eye sling Endless sling
Rope Nominal -------------------------------------------------------------------------------------------------------------------------------------
dia. wt. per Basket hitch; Angle of rope to horizontal Basket hitch; Angle of rope to horizontal
nominal 100 ft Vertical Choker ----------------------------------------------- Vertical Choker --------------------------------------------
in in hitch hitch 90[deg] 60[deg] 45[deg] 30[deg] hitch hitch 90[deg] 60[deg] 45[deg] 30[deg]
inches pounds (0[deg]) (30[deg]) (45[deg]) (60[deg]) (0[deg]) (30[deg]) (45[deg]) (60[deg])
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1/2\ 8.0 635 320 1,270 1,100 900 635 1,140 570 2,290 1,980 1,620 1,140
\9/16\ 10.2 790 395 1,580 1,370 1,120 790 1,420 710 2,840 2,460 2,010 1,420
\5/8\ 13.0 990 495 1,980 1,710 1,400 990 1,780 890 3,570 3,090 2,520 1,780
\3/4\ 17.5 1,240 620 2,480 2,150 1,750 1,240 2,230 1,120 4,470 3,870 3,160 2,230
\13/16\ 21.0 1,540 770 3,080 2,670 2,180 1,540 2,770 1,390 5,540 4,800 3,920 2,770
\7/8\ 25.0 1,780 890 3,560 3,080 2,520 1,780 3,200 1,600 6,410 5,550 4,530 3,200
1 30.5 2,180 1,090 4,360 3,780 3,080 2,180 3,920 2,960 7,850 6,800 5,550 3,920
1\1/16\ 34.5 2,530 1,270 5,060 4,380 3,580 2,530 4,550 2,280 9,110 7,990 6,440 4,550
1\1/8\ 40.0 2,920 1,460 5,840 5,060 4,130 2,920 5,260 2,630 10,500 9,100 7,440 5,260
1\1/4\ 46.3 3,290 1,650 6,580 5,700 4,650 3,290 5,920 2,960 11,800 10,300 8,380 5,920
1\5/16\ 52.5 3,710 1,860 7,420 6,430 5,250 3,710 6,680 3,340 13,400 11,600 9,450 6,680
1\1/2\ 66.8 4,630 2,320 9,260 8,020 6,550 4,630 8,330 4,170 16,700 14,400 11,800 8,330
1\5/8\ 82.0 5,640 2,820 11,300 9,770 7,980 5,640 10,200 5,080 20,300 17,600 14,400 10,200
1\3/4\ 98.0 6,710 3,360 13,400 11,600 9,490 6,710 12,100 6,040 24,200 20,900 17,100 12,100
2 118.0 7,920 3,960 15,800 13,700 11,200 7,920 14,300 7,130 28,500 24,700 20,200 14,300
2\1/8\ 135.0 9,110 4,460 18,200 15,800 12,900 9,110 16,400 8,200 32,800 28,400 23,200 16,400
2\1/4\ 157.0 10,600 5,300 21,200 18,400 15,000 10,600 19,100 9,540 38,200 33,100 27,000 19,100
2\1/2\ 181.0 12,100 6,050 24,200 21,000 17,100 12,100 21,800 10,900 43,600 37,700 30,800 21,800
2\5/8\ 205.0 13,600 6,800 27,200 23,600 19,200 13,600 24,500 12,200 49,000 42,400 34,600 24,500
--------------------------------------------------------------------------------------------------------------------------------------------------------
See Figs. N-184-4 and N-184-5 for sling configuration descriptions.
[[Page 594]]
Table N-184-19--Polypropylene Rope Slings
[Angle of rope to vertical shown in parentheses]
--------------------------------------------------------------------------------------------------------------------------------------------------------
Eye and eye sling Endless sling
Rope Nominal -------------------------------------------------------------------------------------------------------------------------------------
dia. wt. per Basket hitch; Angle of rope to horizontal Basket hitch; Angle of rope to horizontal
nominal 100 ft Vertical Choker ----------------------------------------------- Vertical Choker --------------------------------------------
in in hitch hitch 90[deg] 60[deg] 45[deg] 30[deg] hitch hitch 90[deg] 60[deg] 45[deg] 30[deg]
inches pounds (0[deg]) (30[deg]) (45[deg]) (60[deg]) (0[deg]) (30[deg]) (45[deg]) (60[deg])
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1/2\ 4.7 645 325 1,290 1,120 910 645 1,160 580 2,320 2,010 1,640 1,160
\9/16\ 6.1 780 390 1,560 1,350 1,100 780 1,400 700 2,810 2,430 1,990 1,400
\5/8\ 7.5 950 475 1,900 1,650 1,340 950 1,710 855 3,420 2,960 2,420 1,710
\3/4\ 10.7 1,300 650 2,600 2,250 1,840 1,300 2,340 1,170 4,680 4,050 3,310 2,340
\13/16\ 12.7 1,520 760 3,040 2,630 2,150 1,520 2,740 1,370 5,470 4,740 3,870 2,740
\7/8\ 15.0 1,760 880 3,520 3,050 2,490 1,760 3,170 1,580 6,340 5,490 4,480 3,170
1 18.0 2,140 1,070 4,280 3,700 3,030 2,140 3,850 1,930 7,700 6,670 5,450 3,860
1\1/16\ 20.4 2,450 1,230 4,900 4,240 3,460 2,450 4,410 2,210 8,820 7,640 6,240 4,410
1\1/8\ 23.7 2,800 1,400 5,600 4,850 3,960 2,800 5,040 2,520 10,100 8,730 7,130 5,400
1\1/4\ 27.0 3,210 1,610 6,420 5,560 4,540 3,210 5,780 2,890 11,600 10,000 8,170 5,780
1\5/16\ 30.5 3,600 1,800 7,200 6,240 5,090 3,600 6,480 3,240 13,000 11,200 9,170 6,480
1\1/2\ 38.5 4,540 2,270 9,080 7,860 6,420 4,540 8,170 4,090 16,300 14,200 11,600 8,170
1\5/8\ 47.5 5,510 2,760 11,000 9,540 7,790 5,510 9,920 4,960 19,800 17,200 14,000 9,920
1\3/4\ 57.0 6,580 3,290 13,200 11,400 9,300 6,580 11,800 5,920 23,700 20,500 16,800 11,800
2 69.0 7,960 3,980 15,900 13,800 11,300 7,960 14,300 7,160 28,700 24,800 20,300 14,300
2\1/8\ 80.0 9,330 4,670 18,700 16,200 13,200 9,330 16,800 8,400 33,600 29,100 23,800 16,800
2\1/4\ 92.0 10,600 5,300 21,200 18,400 15,000 10,600 19,100 9,540 38,200 33,100 27,000 19,100
2\1/2\ 107.0 12,200 6,100 24,400 21,100 17,300 12,200 22,000 11,000 43,900 38,000 31,100 22,000
2\5/8\ 120.0 13,800 6,900 27,600 23,900 19,600 13,800 24,800 12,400 49,700 43,000 35,100 24,800
--------------------------------------------------------------------------------------------------------------------------------------------------------
See Figs. N-184-4 and N-184-5 for sling configuration descriptions.
[[Page 595]]
(2) Safe operating temperatures. Natural and synthetic fiber rope
slings, except for wet frozen slings, may be used in a temperature range
from minus 20 [deg]F to plus 180 [deg]F without decreasing the working
load limit. For operations outside this temperature range and for wet
frozen slings, the sling manufacturer's recommendations shall be
followed.
(3) Splicing. Spliced fiber rope slings shall not be used unless
they have been spliced in accordance with the following minimum
requirements and in accordance with any additional recommendations of
the manufacturer:
(i) In manila rope, eye splices shall consist of at least three full
tucks, and short splices shall consist of at least six full tucks, three
on each side of the splice center line.
(ii) In synthetic fiber rope, eye splices shall consist of at least
four full tucks, and short splices shall consist of at least eight full
tucks, four on each side of the center line.
(iii) Strand end tails shall not be trimmed flush with the surface
of the rope immediately adjacent to the full tucks. This applies to all
types of fiber rope and both eye and short splices. For fiber rope under
one inch in diameter, the tail shall project at least six rope diameters
beyond the last full tuck. For fiber rope one inch in diameter and
larger, the tail shall project at least six inches beyond the last full
tuck. Where a projecting tail interferes with the use of the sling, the
tail shall be tapered and spliced into the body of the rope using at
least two additional tucks (which will require a tail length of
approximately six rope diameters beyond the last full tuck).
(iv) Fiber rope slings shall have a minimum clear length of rope
between eye splices equal to 10 times the rope diameter.
(v) Knots shall not be used in lieu of splices.
(vi) Clamps not designed specifically for fiber ropes shall not be
used for splicing.
(vii) For all eye splices, the eye shall be of such size to provide
an included angle of not greater than 60 degrees at the splice when the
eye is placed over the load or support.
(4) End attachments. Fiber rope slings shall not be used if end
attachments in contact with the rope have sharp edges or projections.
(5) Removal from service. Natural and synthetic fiber rope slings
shall be immediately removed from service if any of the following
conditions are present:
(i) Abnormal wear.
(ii) Powdered fiber between strands.
(iii) Broken or cut fibers.
(iv) Variations in the size or roundness of strands.
(v) Discoloration or rotting.
(vi) Distortion of hardware in the sling.
(6) Repairs. Only fiber rope slings made from new rope shall be
used. Use of repaired or reconditioned fiber rope slings is prohibited.
(i) Synthetic web slings--(1) Sling identification. Each sling shall
be marked or coded to show the rated capacities for each type of hitch
and type of synthetic web material.
(2) Webbing. Synthetic webbing shall be of uniform thickness and
width and selvage edges shall not be split from the webbing's width.
(3) Fittings. Fittings shall be:
(i) Of a minimum breaking strength equal to that of the sling; and
(ii) Free of all sharp edges that could in any way damage the
webbing.
(4) Attachment of end fittings to webbing and formation of eyes.
Stitching shall be the only method used to attach end fittings to
webbing and to form eyes. The thread shall be in an even pattern and
contain a sufficient number of stitches to develop the full breaking
strength of the sling.
(5) Sling use. Synthetic web slings illustrated in Fig. N-184-6
shall not be used with loads in excess of the rated capacities specified
in Tables N-184-20 through N-184-22. Slings not included in these tables
shall be used only in accordance with the manufacturer's
recommendations.
(6) Environmental conditions. When synthetic web slings are used,
the following precautions shall be taken:
(i) Nylon web slings shall not be used where fumes, vapors, sprays,
mists or liquids of acids or phenolics are present.
(ii) Polyester and polypropylene web slings shall not be used where
fumes, vapors, sprays, mists or liquids of caustics are present.
[[Page 596]]
(iii) Web slings with aluminum fittings shall not be used where
fumes, vapors, sprays, mists or liquids of caustics are present.
[GRAPHIC] [TIFF OMITTED] TC27OC91.050
[GRAPHIC] [TIFF OMITTED] TC27OC91.051
[[Page 597]]
Table N-184-20--Synthetic Web Slings--1,000 Pounds per Inch of Width--Single-Ply
[Rated capacity in pounds]
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triangle--Choker slings, type I: Triangle-- Endless slings, type V Return eye slings, type VI
Triangle slings, type II: Eye and eye with flat -------------------------------------------------------------------------------------------------------
eye slings, type III: Eye and eye with twisted eye
Sling body width, inches slings, type IV
---------------------------------------------------- Vert. Choker Vert. 30[deg] 45[deg] 60[deg] Vert. Choker Vert. 30[deg] 45[deg] 60[deg]
Vert. 30[deg] 45[deg] 60[deg] basket basket basket basket basket basket basket basket
Vert. Choker basket basket basket basket
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1................................... 1,000 750 2,000 1,700 1,400 1,000 1,600 1,300 3,200 2,800 2,300 1,600 800 650 1,600 1,400 1,150 800
2................................... 2,000 1,500 4,000 3,500 2,800 2,000 3,200 2,600 6,400 5,500 4,500 3,200 1,600 1,300 3,200 2,800 2,300 1,600
3................................... 3,000 2,200 6,000 5,200 4,200 3,000 4,800 3,800 9,600 8,300 6,800 4,800 2,400 1,950 4,800 4,150 3,400 2,400
4................................... 4,000 3,000 8,000 6,900 5,700 4,000 6,400 5,100 12,800 11,100 9,000 6,400 3,200 2,600 6,400 5,500 4,500 3,200
5................................... 5,000 3,700 10,000 8,700 7,100 5,000 8,000 6,400 16,000 13,900 11,300 8,000 4,000 3,250 8,000 6,900 5,650 4,000
6................................... 6,000 4,500 12,000 10,400 8,500 6,000 9,600 7,700 19,200 16,600 13,600 9,600 4,800 3,800 9,600 8,300 6,800 4,800
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes: 1. All angles shown are measured from the vertical.
2. Capacities for intermediate widths not shown may be obtained by interpolation.
Table N-184-21--Synthetic Web Slings--1,200 Pounds per Inch of Width--Single-ply
[Rated capacity in pounds]
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triangle--Choker slings, type I: Triangle--Triangle Endless slings, type V Return eye slings, type VI
slings, type II: Eye and eye with flat eye slings, -----------------------------------------------------------------------------------------------------------
type III: Eye and eye with twisted eye slings, type
Sling body width, inches IV
----------------------------------------------------- Vert. Choker Vert. 30[deg] 45[deg] 60[deg] Vert. Choker Vert. 30[deg] 45[deg] 60[deg]
Vert. 30[deg] 45[deg] 60[deg] basket basket basket basket basket basket basket basket
Vert. Choker basket basket basket basket
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1.............................. 1,200 900 2,400 2,100 1,700 1,200 1,900 1,500 3,800 3,300 2,700 1,900 950 750 1,900 1,650 1,350 950
2.............................. 2,400 1,800 4,800 4,200 3,400 2,400 3,800 3,000 7,600 6,600 5,400 3,800 1,900 1,500 3,800 3,300 2,700 1,900
3.............................. 3,600 2,700 7,200 6,200 5,100 3,600 5,800 4,600 11,600 10,000 8,200 5,800 2,850 2,250 5,700 4,950 4,050 2,850
4.............................. 4,800 3,600 9,600 8,300 6,800 4,800 7,700 6,200 15,400 13,300 10,900 7,700 3,800 3,000 7,600 6,600 5,400 3,800
5.............................. 6,000 4,500 12,000 10,400 8,500 6,000 9,600 7,700 19,200 16,600 13,600 9,600 4,750 3,750 9,500 8,250 6,750 4,750
6.............................. 7,200 5,400 14,400 12,500 10,200 7,200 11,500 9,200 23,000 19,900 16,300 11,500 5,800 4,600 11,600 10,000 8,200 5,800
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes: 1. All angles shown are measured from the vertical.
2. Capacities for intermediate widths not shown may be obtained by interpolation.
Table N-184-22--Synthetic Web Slings--1,600 Pounds per Inch of Width--Single-Ply
[Rated capacity in pounds]
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triangle--Choker slings, type I: Triangle-- Endless slings, type V Return eye slings, type VI
Triangle slings, type II: Eye and eye with flat -----------------------------------------------------------------------------------------------------------
eye slings, type III: Eye and eye with twisted eye
Sling body width, inches slings, type IV
---------------------------------------------------- Vert. Choker Vert. 30[deg] 45[deg] 60[deg] Vert. Choker Vert. 30[deg] 45[deg] 60[deg]
Vert. 30[deg] 45[deg] 60[deg] basket basket basket basket basket basket basket basket
Vert. Choker basket basket basket basket
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1............................... 1,600 1,200 3,200 2,800 2,300 1,600 2,600 2,100 5,200 4,500 3,700 2,600 1,050 1,050 2,600 2,250 1,850 1,300
[[Page 598]]
2............................... 3,200 2,400 6,400 5,500 4,500 3,200 5,100 4,100 10,200 8,800 7,200 5,100 2,600 2,100 5,200 4,500 3,700 2,600
3............................... 4,800 3,600 9,600 8,300 6,800 4,800 7,700 6,200 15,400 13,300 10,900 7,700 3,900 3,150 7,800 6,750 5,500 3,900
4............................... 6,400 4,800 12,800 11,100 9,000 6,400 10,100 8,200 20,400 17,700 14,400 10,200 5,100 4,100 10,200 8,800 7,200 5,100
5............................... 8,000 6,000 16,000 13,800 11,300 8,000 12,800 10,200 25,600 22,200 18,100 12,800 6,400 5,150 12,800 11,050 9,050 6,400
6............................... 9,600 7,200 19,200 16,600 13,600 9,600 15,400 12,300 30,800 26,700 21,800 15,400 7,700 6,200 15,400 13,300 10,900 7,700
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes: 1. All angles shown are measured from the vertical.
2. Capacities for intermediate widths not shown may be obtained by interpolation.
[[Page 599]]
(7) Safe operating temperatures. Synthetic web slings of polyester
and nylon shall not be used at temperatures in excess of 180 [deg]F.
Polypropylene web slings shall not be used at temperatures in excess of
200 [deg]F.
(8) Repairs. (i) Synthetic web slings which are repaired shall not
be used unless repaired by a sling manufacturer or an equivalent entity.
(ii) Each repaired sling shall be proof tested by the manufacturer
or equivalent entity to twice the rated capacity prior to its return to
service. The employer shall retain a certificate of the proof test and
make it available for examination.
(iii) Slings, including webbing and fittings, which have been
repaired in a temporary manner shall not be used.
(9) Removal from service. Synthetic web slings shall be immediately
removed from service if any of the following conditions are present:
(i) Acid or caustic burns;
(ii) Melting or charring of any part of the sling surface;
(iii) Snags, punctures, tears or cuts;
(iv) Broken or worn stitches; or
(v) Distortion of fittings.
[40 FR 27369, June 27, 1975, as amended at 40 FR 31598, July 28, 1975;
41 FR 13353, Mar. 30, 1976; 58 FR 35309, June 30, 1993; 61 FR 9240, Mar.
7, 1996]
