Section 1605.8 - Requirements for Inside Hoists(a) The sides of the hoistways not used for entrances shall be enclosed on each floor for their entire height with wire mesh or equivalent material and reinforced to withstand a horizontal force of 100 pounds per square foot, applied to any point. The openings in the mesh shall reject a one-inch steel ball.(b) Protective covering of heavy planking shall be provided below the cathead of all hoists to prevent objects falling down the hoistway.Cal. Code Regs. Tit. 8, § 1605.8