Safety requirements for scaffolding in Standards - 29 CFR 25
To be continued:
1910.28(m)(6)
Horses or parts which have become weak or defective shall not be used.
1910.28(m)(7)
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(n)
"Needle beam scaffold."
1910.28(n)(1)
Wood needle beams shall be in accordance with paragraph (a)(5) and (9) of this section, and shall be not less than 4 by 6 inches in size, with the greater dimension placed in a vertical direction. Metal beams or the equivalent conforming to paragraph (a)(4) and (8) of this section may be used.
1910.28(n)(2)
Ropes or hangers shall be provided for supports. The span between supports on the needle beam shall not exceed 10 feet for 4- by 6-inch timbers. Rope supports shall be equivalent in strength to 1-inch diameter first-grade manila rope.
1910.28(n)(3)
The ropes shall be attached to the needle beams by a scaffold hitch or a properly made eye splice. The loose end of the rope shall be tied by a bowline knot or by a round turn and one-half hitch.
1910.28(n)(4)
The platform span between the needle beams shall not exceed 8 feet when using 2-inch scaffold plank. For spans greater than 8 feet, platforms shall be designed based on design requirements for the special span. The overhang of each end of the platform planks shall be not less than 1 foot and not more than 18 inches.
1910.28(n)(5)
When one needle beam is higher than the other or when the platform is not level the platform shall be secured against slipping.
1910.28(n)(6)
All unattached tools, bolts, and nuts used on needle beam scaffolds shall be kept in suitable containers.
1910.28(n)(7)
One end of a needle beam scaffold may be supported by a permanent structural member conforming to paragraphs (a)(4) and (8) of this section.
1910.28(n)(8)
Each man working on a needle beam scaffold 20 feet or more above the ground or floor and working with both hands, 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 workman in case of a fall.
1910.28(o)
"Plasterers', decorators', and large area scaffolds."
1910.28(o)(1)
Plasterers', decorators', lathers'; and ceiling workers' inside scaffolds shall be constructed in accordance with the general requirements set forth for independent wood pole scaffolds.
1910.28(o)(2)
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(o)(3)
All platform planks shall be laid with the edges close together.
1910.28(o)(4)
When independent pole scaffold platforms are erected in sections, such sections shall be provided with connecting runways equipped with substantial guardrails.
1910.28(p)
"Interior hung scaffolds."
1910.28(p)(1)
[Reserved]
1910.28(p)(2)
The suspended steel wire rope shall conform to paragraph (a)(22) of this section. Wire may be used providing the strength requirements of paragraph (a)(22) of this section are met.
1910.28(p)(3)
For hanging wood scaffolds, the following minimum nominal size material is recommended:
1910.28(p)(3)(i)
Supporting bearers 2 by 9 inches on edge.
1910.28(p)(3)(ii)
Planking 2 by 9 inches or 2 by 10 inches, with maximum span 7 feet for heavy duty and 10 feet for light duty or medium duty.
1910.28(p)(4)
Steel tube and coupler members may be used for hanging scaffolds with both types of scaffold designed to sustain a uniform distributed working load up to heavy duty scaffold loads with a safety factor of four.
1910.28(p)(5)
When a hanging scaffold is supported by means of wire rope, such wire rope shall be wrapped at least twice ar