Safety requirements for scaffolding in Standards - 29 CFR 19
To be continued:
TABLE D-16 - MINIMUM NOMINAL SIZE AND MAXIMUM SPACING OF
MEMBERS OF OUTRIGGER SCAFFOLDS
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| Light duty | Medium duty
____________________________|________________|________________
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Maximum scaffold load.......| 25 p.s.f.......| 50 p.s.f.
Outrigger size..............| 2 x 10 in......| 3 x 10 in.
Maximum outrigger spacing...| 10 ft. 0 in....| 6 ft. 0 in.
Planking....................| 2 x 9 in.......| 2 x 9 in.
Guardrail...................| 2 x 4 in.......| 2 x 4 in.
Guardrail uprights..........| 2 x 4 in.......| 2 x 4 in.
Toeboards (minimum).........| 4 in...........| 4 in.
____________________________|________________|________________
1910.28(f)(3)
The platform shall be supported by wire ropes in conformity with paragraph (a)(22) of this section, suspended from overhead outrigger beams.
1910.28(f)(4)
The scaffold outrigger beams shall consist of structural metal securely fastened or anchored to the frame or floor system of the building or structure.
1910.28(f)(5)
Each outrigger beam shall be equivalent in strength to at least a standard 7-inch, 15.3-pound steel I-beam, be at least 15 feet long, and shall not project more than 6 feet 6 inches beyond the bearing point.
1910.28(f)(6)
Where the overhang exceeds 6 feet 6 inches, outrigger beams shall be composed of stronger beams or multiple beams and be installed in accordance with approved designs and instructions.
1910.28(f)(7)
If channel iron outrigger beams are used in place of I-beams, they shall be securely fastened together with the flanges turned out.
1910.28(f)(8)
All outrigger beams shall be set and maintained with their webs into vertical position.
1910.28(f)(9)
A stop bolt shall be placed at each end of every outrigger beam.
1910.28(f)(10)
The outrigger beam shall rest on suitable wood-bearing blocks.
1910.28(f)(11)
All parts of the scaffold such as bolts, nuts, fittings, clamps, wire rope, and outrigger beams and their fastenings, shall be maintained in sound and good working condition and shall be inspected before each installation and periodically thereafter.
1910.28(f)(12)
The free end of the suspension wire ropes shall be equipped with proper size thimbles and be secured by splicing or other equivalent means. The running ends shall be securely attached to the hoisting drum and at least four turns of rope shall at all times remain on the drum.
1910.28(f)(13)
Where a single outrigger beam is used, the steel shackles or clevises with which the wire ropes are attached to the outrigger beams shall be placed directly over the hoisting drums.
1910.28(f)(14)
The scaffold platform shall be equivalent in strength to at least 2-inch planking. (For maximum planking spans see paragraph (a)(9) of this section.
1910.28(f)(15)
Guardrails not less than 2 x 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 x 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.