[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: 29CFR1910.216]

[Page 625-626]
 
                             TITLE 29--LABOR

 
CHAPTER XVII--OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT 

                                OF LABOR

 
PART 1910_OCCUPATIONAL SAFETY AND HEALTH STANDARDS--Table of Contents

 
                Subpart O_Machinery and Machine Guarding

 
Sec. 1910.216  Mills and calenders in the rubber and plastics industries.


    (a) General requirements--

    (1)-(2) [Reserved]

    (3) Auxiliary equipment. Mechanical and electrical equipment and 

auxiliaries shall be installed in accordance with this section and 

Subpart S of this part.

    (4) Mill roll heights. All new mill installations shall be installed 

so that the top of the operating rolls is not less than 50 inches above 

the level on which the operator stands, irrespective of the size of the 

mill. This distance shall apply to the actual working level, whether it 

be at the general floor level, in a pit, or on a platform.

    (b) Mill safety controls--(1) Safety trip control. A safety trip 

control shall be provided in front and in back of each mill. It shall be 

accessible and shall operate readily on contact. The safety trip control 

shall be one of the following types or a combination thereof:

    (i) Pressure-sensitive body bars. Installed at front and back of 

each mill having a 46-inch roll height or over. These bars shall operate 

readily by pressure of the mill operator's body.

    (ii) Safety triprod. Installed in the front and in the back of each 

mill and located within 2 inches of a vertical plane tangent to the 

front and rear rolls. The top rods shall be not more than 72 inches 

above the level on which the operator stands. The triprods shall be 

accessible and shall operate readily whether the rods are pushed or 

pulled.

    (iii) Safety tripwire cable or wire center cord. Installed in the 

front and in the back of each mill and located within 2 inches of a 

vertical plane tangent to the front and rear rolls. The cables shall not 

be more than 72 inches above the level on which the operator stands. The 

tripwire cable or wire center cord shall operate readily whether cable 

or cord is pushed or pulled.

    (2) [Reserved]

    (3) Auxiliary equipment. All auxiliary equipment such as mill 

divider, support bars, spray pipes, feed conveyors, strip knives, etc., 

shall be located in such a manner as to avoid interference with access 

to and operation of safety devices.

    (c) Calender safety controls--(1) Safety trip, face. A safety 

triprod, cable, or wire center cord shall be provided across each pair 

of in-running rolls extending the length of the face of the rolls. It 

shall be readily accessible and operate whether pushed or pulled. The 

safety tripping devices shall be located within reach of the operator 

and the bite.

    (2) Safety trip, side. On both sides of the calender and near each 

end of the face of the roll, there shall be a cable or wire center cord 

connected to the safety trip. They shall operate readily when pushed or 

pulled.

    (d) Protection by location--(1) Mills. Where a mill is so installed 

that persons cannot normally reach through, over, under, or around to 

come in contact with the roll bite or be caught between a roll and an 

adjacent object, then, provided such elements are made a fixed part of a 

mill, safety control devices listed in paragraph (b) of this section 

shall not apply.

    (2) Calenders. Where a calender is so installed that persons cannot 

normally reach through, over, under, or around



[[Page 626]]



to come in contact with the roll bite or be caught between a roll and an 

adjacent object, then, provided such elements are made a fixed part of a 

calender, safety control devices listed in paragraph (c) of this section 

shall not apply.

    (e) Trip and emergency switches. All trip and emergency switches 

shall not be of the automatically resetting type, but shall require 

manual resetting.

    (f) Stopping limits--(1) Determination of distance of travel. All 

measurements on mills and calenders shall be taken with the rolls 

running empty at maximum operating speed. Stopping distances shall be 

expressed in inches of surface travel of the roll from the instant the 

emergency stopping device is actuated.

    (2) Stopping limits for mills. All mills irrespective of the size of 

the rolls or their arrangement (individually or group-driven) shall be 

stopped within a distance, as measured in inches of surface travel, not 

greater than 1\1/2\ percent of the peripheral no-load surface speeds of 

the respective rolls as determined in feet per minute.

    (3) Stopping limits for calenders. (i) All calenders, irrespective 

of size of the rolls or their configuration, shall be stopped within a 

distance, as measured in inches of surface travel, not greater than 1\3/

4\ percent of the peripheral no-load surface speeds of the respective 

calender rolls as determined in feet per minute.

    (ii) Where speeds above 250 feet per minute as measured on the 

surface of the drive roll are used, stopping distances of more than 1\3/

4\ percent are permissible. Such stopping distances shall be subject to 

engineering determination.



[39 FR 23502, June 27, 1974, as amended at 49 FR 5323, Feb. 10, 1984; 61 

FR 9240, Mar. 7, 1996]