Safety requirements for scaffolding in Standards - 29 CFR 2
To be Continued:
1910.28(a)(4)
Scaffolds and their components shall be capable of supporting without failure at least four times the maximum intended load.
1910.28(a)(5)
Scaffolds and other devices mentioned or described in this section shall be maintained in safe condition. Scaffolds shall not be altered or moved horizontally while they are in use or occupied.
1910.28(a)(6)
Any scaffold damaged or weakened from any cause shall be immediately repaired and shall not be used until repairs have been completed.
1910.28(a)(7)
Scaffolds shall not be loaded in excess of the working load for which they are intended.
1910.28(a)(8)
All load-carrying timber members of scaffold framing shall be a minimum of 1,500 f. (Stress Grade) construction grade lumber. All dimensions are nominal sizes as provided in the American Lumber Standards, except that where rough sizes are noted, only rough and undressed lumber or the size specified will satisfy minimum requirements. (Note: Where nominal sizes of lumber are used in place of rough sizes, the nominal size lumber shall be such as to provide equivalent strength to that specified in tables D-7 through D-12 and D-16.
1910.28(a)(9)
All planking shall be Scaffold Grade as recognized by grading rules for the species of wood used. The maximum permissible spans for 2- X 9-inch or wider planks are shown in the following table:
_______________________________________________________________
| Material
|________________________________
| |
| Full thickness | Nominal
| undressed lumber | thickness
|_______________ | lumber
| | | |_____________
___________ |_____|_____|______ |______|______
| | | | |
Working load (p.s.f.).........| 25 | 50 | 75 | 25 | 50 |
Permissible span (ft.)........| 10 | 8 | 6 | 8 | 9 |
__________________________ |___ |___ |____ |__ _ |______
The maximum permissible span for 1 1/4 x 9-inch or wider plank of full thickness is 4 feet with medium loading of 50 p.s.f.
1910.28(a)(10)
Nails or bolts used in the construction of scaffolds shall be of adequate size and in sufficie<