Section 2.10 Guarding of Equipment and Standard Railing
In machinery spaces, machine rooms, control spaces, and control rooms, the following shall be guarded to protect against accidental contact:
(a) driving-machine sheaves and ropes whose vertical projection upon a horizontal plane extends beyond the base of the machine, unless the driving-machine sheave is located to minimize the possibility of contact
(c) exposed gears, sprockets, tape or rope sheaves, or drums of selectors, floor controllers, or signal machines, and their driving ropes, chains, or tapes
(d) keys, keyways, and screws in projecting shafts Hand-winding wheels and flywheels that are not guarded shall have yellow markings.
A standard railing shall be substantially constructed of metal and shall consist of a top rail, intermediate rail or equivalent structural member or solid panel, and toe-board.
(a) at least 890 N (200 lbf) applied in any lateral or. downward vertical direction, at any point along the top rail.
(b) at least 666 N (150 lbf) applied in any lateral or downward vertical direction at any point along the center of the intermediate rail, member, or panel. If the standard railing is a solid panel extending from the top rail to the toeboard, the application of the force specified in (a) shall be considered to meet the requirements of (b).
(c) 225 N (50 lbf) applied in a lateral direction to the toeboard.