c. Rolling Towers. The following safety rules apply to setting up and using rolling towers.
Inspect all tower parts before use. Do not use parts that are damaged by corrosion,
Use a guy or tie off towers with heights that are more than three times the minimum base
dimension, and fix towers at every 18 feet of elevation. Maintain the stability of towers
over 25 feet high with outriggers or handling lines. Use horizontal and diagonal bracing
at the bottom and at every height section.
Provide unit lock arms on all towers. Do not use casters less than 6 inches in diameter.
Do not extend adjusting screws more than 12 inches.
Look where you are going when moving towers. Do not attempt to move a tower without
sufficient help. Apply all caster brakes when the tower is stationary. Never ride towers.
d. Swinging Scaffolds and Boatswain's Chairs. The following safety rules apply to setting up
and using swinging scaffolds and boatswain's chairs (Figures 1-16 through 1-18, pages 1-21 and 1-22).
Read instructions on the proper use and maintenance of the equipment.
Follow prescribed load capacities.
Use stages at least 27 inches wide and supply them with guardrails (not rope).
Use only experienced personnel to erect or operate stages.
Check ropes and blocks before use by suspending stages 1 foot off the ground and
loading with at least four times the anticipated work load.
Check for nearby electric power lines before locating on the job site.
Use power stages that have free-fall safety devices with hand controls in case of power