Section Lab 1403.55 - ScaffoldsThe employer shall ensure compliance with the following requirements:
(a) Scaffolds shall be erected on sound, rigid footing capable of carrying the maximum intended load without settling or displacement;(b) All planking shall stress-graded lumber to assure the quality of the lumber; and(c) The maximum permissible spans for 2 x 10 or wider planks shall be as shown in Table 4 1400.2, Planking Material Thickness: Table 1400.2 - Planking Material Thickness
| Full Thickness Undressed Lumber | Nominal Thickness Lumber |
Working load (p.s.f.) | 25 | 50 | 75 | 25 | 50 |
| | | | | |
Permissible Span (ft.) | 10 | 8 | 6 | 8 | 6 |
(d) The maximum permissible span for 1-1/4 x 9 inch or wider plank of full thickness is shall be 4 feet, with medium loading of 50 p.s.f.;(e) Scaffold planking shall be overlapped a minimum of 12 inches or secured from movement;(f) Scaffold planks shall extend over their end supports not less than 6 inches nor more than 12 inches;(g) Defective parts of all scaffolding and accessories shall immediately be replaced or repaired;(h) An access ladder or equivalent safe access shall be provided;(i) Mobile platforms shall be tightly planked for the full width of the scaffold except for necessary entrance opening, and platforms shall be secured in place;(j) All employees working on suspension scaffolds shall be protected by a safety life belt attached to a lifeline which shall comply with the following requirements: (1) The lifeline shall be securely attached to substantial members of the structure, not the scaffold, or to securely rigged lines, which shall safely suspend the employee in case of a fall; and(2) In order to keep the lifeline continuously attached, with a minimum of slack, to a fixed structure, the attachment point of the lifeline shall be changed as the work progresses; and(k) Tubular welded frame scaffolds shall be properly braced by cross bracing or diagonal braces, or both, for securing vertical members together laterally, as follows: (1) The cross braces shall be of such length as shall automatically square and align vertical members so that the erected scaffold is always plumb, square, and rigid; and(2) All brace connections shall be made secure.N.H. Admin. Code § Lab 1403.55
#4118 eff 8-22-86, EXPIRED: 8-22-92
New. #6684, eff 2-4-98, EXPIRED: 2-4-06
New. #8606, INTERIM, eff 4-12-06, EXPIRED: 10-09-06 (formerly Lab 1403.69 )
New. #8796, eff 1-11-07 (from Lab 1403.59 )
Amended and Renumbered from Lab 1403.52 by Volume XXXV Number 18, Filed May 7, 2015 , Proposed by #10809, Effective 4/9/2015, Expires4/9/2015.