Washington Administrative Code › Title 296 - Labor and Industries, Department of › Chapter 296-78 - Safety standards for sawmills and woodworking operations › Section 296-78-790 - Crane platforms and footwalks

Current through Register Vol. 24-14, July 15, 2024
(1) Platforms must be provided when changing
			 and repairing truck wheels on end trucks.
(2) A platform or footwalk must be located on
			 a crane or crane runway to give access to the crane cage, and it must be
			 accessible from one or more stairways or fixed ladders. This platform or
			 footwalk must be not less than eighteen inches in width.
(3) Where stairways are used to give access
			 to platforms, they must make an angle of not more than fifty degrees with the
			 horizontal and must be equipped with substantial railing. If ladders are used
			 to give access to platforms they must extend not less than thirty-six inches
			 above the platform. Railed stairways or ladders to be used as a means of
			 ingress and egress to crane cages must be located at either or both
			 ends.
(4) A footwalk must be placed
			 along the entire length of the bridge on the motor side, and a short platform
			 twice the length of the trolley placed at one end of the girder on the opposite
			 side, with a vertical clearance of a least six feet six inches where the design
			 of crane or building permits, but in no case must there be less than four feet
			 clearance. For hand operated cranes the footwalk must not be required to be
			 installed on the bridge of the crane, but there must be a repair platform equal
			 in strength and design to that required for motor operated cranes, installed on
			 the wall of the building or supported by the crane runway at a height equal to
			 the lower edge of the bridge girder to facilitate necessary repairs.
(5) Clear width of footwalks must not be less
			 than eighteen inches except around the bridge motor where it may be reduced to
			 fifteen inches.
(6) Footwalks must
			 be of substantial construction and rigidly braced. Footwalks for outside
			 service must be constructed so as to provide proper drainage, but the cracks
			 between the boards must not be wider than one-fourth inch.
(7) Every footwalk must have a standard
			 railing and toeboard at all exposed edges. Railings and toeboards must conform
			 in construction and design with the following requirements:
(a) Railings must be not less than thirty-six
			 inches nor more than forty-two inches in height, with an additional rail midway
			 between the top rail and the floor.
(b) Pipe railings must be not less than one
			 and one-fourth inch inside diameter if of iron or be not less than one and
			 one-half inches outside diameter if of brass tubing.
(c) Metal rails other than pipe must be at
			 least equal in strength to that of one and one-half by three-sixteenths inch
			 angle and must be supported by uprights of equal strength.
(d) Posts or uprights must be spaced not more
			 than eight feet center to center.
(e) Toeboards must be not less than four
			 inches in height.
(f) Toeboards
			 must be constructed in a permanent and substantial manner of metal, wood, or
			 other material equivalent thereto in strength. Where of wood, toeboards must be
			 at least equal in cross section to one inch by four inches; where of steel at
			 least one-eighth inch by four inches; where of other construction at least
			 equal to the requirements for steel. Perforations up to one-half inch are
			 permissible in metal toeboards.