WAC 296-78-740
Transportation -- Lumber handling
equipment -- Cranes -- Construction. (1) All apparatus shall be
designed throughout, with not less than the following factors of
safety, under static full rated load stresses, based on ultimate
strength of the material used:
Material
Factor of Safety
Cast iron . . . . . . . . . . . .
12
Cast steel . . . . . . . . . . . .
8
Structural steel . . . . . . . . . . . .
5
Forged steel . . . . . . . . . . . .
5
Cables . . . . . . . . . . . .
5
(2) A notice shall be placed on every crane and hoist
showing the maximum allowable load in pounds or tons. This
notice shall be placed in such a manner as to be clearly legible
from the floor.
(3) Cranes shall be of what is known as "all steel
construction." No cast iron shall be used in parts subject to
tension except in drums, trolley sides, bearings, brackets and
brake shoes.
(4) The construction of cranes shall be such that all parts
may be safely lubricated and inspected when cranes are not in
operation.
(5) Bolts subject to stress shall be of the through type and
all bolts shall be equipped with approved protection so that the
bolt will not work loose or nuts work off.
(6) Outside crane cages shall be enclosed. There shall be
windows on three sides of the cage and windows in the front, and
the side opposite the door shall be the full width of the cage.
(7) Where a tool box or receptacle is used for the storing
of oil cans, tools, etc., it shall be permanently secured in the
cage or on the foot-walk of outside cranes and on the foot-walk
of inside cranes. Tool boxes of hot metal cranes shall be
constructed of metal.
(8) All gears on cranes shall be provided with standard
guards.
(9) Keys projecting from revolving shafts shall be guarded.
(10) A braking apparatus shall be provided on every type of
crane and shall be so designed and installed as to be capable of
effectually braking a weight of at least one and one-half times
the full rated load.