Safety requirements for scaffolding in Standards - 29 CFR 23
To be continued:
1910.28(j)
"Boatswain's chairs."
1910.28(j)(1)
The chair seat shall be not less than 12 by 24 inches, and of 1-inch thickness. The seat shall be reinforced on the underside to prevent the board from splitting.
1910.28(j)(2)
The two fiber rope seat slings shall be of 5/8-inch diameter, reeved through the four seat holes so as to cross each other on the underside of the seat.
1910.28(j)(3)
Seat slings shall be of at least 3/8-inch wire rope when a workman is conducting a heat producing process such as gas or arc welding.
1910.28(j)(4)
The workman shall be protected by a safety life belt attached to a lifeline. The lifeline shall be securely attached to substantial members of the structure (not scaffold), or to securely rigged lines, which will safely suspend the worker in case of a fall.
1910.28(j)(5)
The tackle shall consist of correct size ball bearing or bushed blocks and properly spliced 5/8-inch diameter first-grade manila rope.
1910.28(j)(6)
The roof irons, hooks, or the object to which the tackle is anchored shall be securely installed. Tiebacks when used shall be installed at right angles to the face of the building and securely fastened to a chimney
1910.28(k)
"Carpenters' bracket scaffolds."
1910.28(k)(1)
The brackets shall consist of a triangular wood frame not less than 2 by 3 inches in cross section, or of metal of equivalent strength. Each member shall be properly fitted and securely joined.
1910.28(k)(2)
Each bracket shall be attached to the structure by means of one of the following:
1910.28(k)(2)(i)
A bolt no less than five-eighths inch in diameter which shall extend through the inside of the building wall.
1910.28(k)(2)(ii)
A metal stud attachment device
1910.28(k)(2)(iii)
Welding to steel tanks
1910.28(k)(2)(iv)
Hooking over a well-secured and adequately strong supporting member.
The brackets shall be spaced no more than 10 feet apart.
1910.28(k)(3)
No more than two persons shall occupy any given 10 feet of a bracket scaffold at any one time. Tools and materials shall not exceed 75 pounds in addition to the occupancy.
1910.28(k)(4)
The platform shall consist of not less than two 2- by 9-inch nominal size planks extending not more than 18 inches or less than 6 inches beyond each end support.
1910.28(k)(5)
Guardrails not less than 2 by 4 inches or the equivalent and not less than 36 inches or more than 42 inches high, with a mid-rail, when required, of 1- by 4-inch lumber or equivalent, and toeboards. shall be installed at all open sides on all scaffolds more than 10 feet above the ground or floor. Toeboards shall be a minimum of 4 inches in height. Wire mesh shall be installed in accordance with paragraph (a)(17) of this section.
1910.28(l)
"Bricklayers' square scaffolds."
1910.28(l)(1)
The squares shall not exceed 5 feet in width and 5 feet in height.
1910.28(l)(2)
Members shall be not less than those specified in Table D-18.
1910.28(l)(3)
The squares shall be reinforced on both sides of each corner with 1- by 6-inch gusset pieces. They shall also have braces 1 by 8 inches on both sides running from center to center of each member, or other means to secure equivalent strength and rigidity.
1910.28(l)(4)
The squares shall be set not more than 5 feet apart for medium duty scaffolds, and not more than 8 feet apart for light duty scaffolds. Bracing 1 x 8 inches, extending from the bottom of each square to the top of the next square, shall be provided on both front and rear sides of the scaffold.