Oregon Administrative Rules › Chapter 437 - DEPARTMENT OF CONSUMER AND BUSINESS SERVICES, OREGON OCCUPATIONAL SAFETY AND HEALTH DIVISION › Division 4 - AGRICULTURE › Section 437-004-0370 - Scaffolding

Current through Register Vol. 63, No. 7, July 1, 2024
(1) Scope. This
			 section has safety requirements for scaffolds.
(2) Definitions. Scaffolding terms mean:
(a) Bearer. A horizontal part of a scaffold
			 on which the platform rests and which may use ledgers as support.
(b) Boatswain's chair. A seat supported by
			 slings attached to a suspended rope, designed to accommodate one worker in a
			 sitting position.
(c) Brace. A tie
			 that holds one scaffold part in a fixed position with respect to
			 another.
(d) Crawling board or
			 chicken ladder. A plank with cleats spaced and secured at equal intervals, for
			 use on roofs, not designed to carry any material.
(e) Double pole or independent pole scaffold.
			 A scaffold supported from the base by a double row of uprights, independent of
			 support from the walls and constructed of uprights, ledgers, horizontal
			 platform bearers, and diagonal bracing.
(f) Guardrail. A rail secured to uprights
			 that run along the exposed sides and ends of platforms.
(g) Heavy duty scaffold. A scaffold built to
			 carry a working load of not more than 75 pounds per square foot.
(h) Horse scaffold. A scaffold for light or
			 medium duty, made of horses supporting a work platform.
(i) Ladder jack scaffold. A light duty
			 scaffold supported by brackets attached to ladders.
(j) Ledger (stringer). A horizontal scaffold
			 member that extends from post to post and supports the putlogs or bearer
			 forming a tie between the posts.
(k) Light duty scaffold. A scaffold built to
			 carry a working load not more than 25 pounds per square foot.
(l) Manually propelled mobile scaffold. A
			 portable rolling scaffold mounted on casters.
(m) Maximum intended load. The total of all
			 loads including the working load, the weight of the scaffold, and such other
			 loads as may be reasonably anticipated.
(n) Medium duty scaffold. A scaffold built to
			 carry a working load not more than 50 pounds per square foot.
(o) Mid-rail. A rail approximately midway
			 between the guardrail and platform and secured to the uprights along the
			 exposed sides and ends of platforms.
(p) Putlog. A scaffold part on which the
			 platform rests.
(q) Roofing
			 bracket. A bracket used in sloped roof construction. It has a way for fastening
			 to the roof or is supported by ropes fastened over the ridge and secured to
			 some suitable object.
(r) Runner.
			 The lengthwise horizontal bracing or bearing parts or both.
(s) Scaffold. Any temporary elevated platform
			 and its supporting structure used for supporting workers or materials or
			 both.
(t) Single pole scaffold.
			 Platforms resting on putlogs or crossbeams, the outside ends of which are on
			 ledgers secured to a single row of posts or uprights and the inner ends of
			 which are on or in a wall.
(u)
			 Toeboard. A barrier secured along the sides and ends of a platform, to keep
			 material from falling.
(v) Tubular
			 welded frame scaffold. A sectional, panel, or frame metal scaffold made of
			 prefabricated welded sections, that has posts and bearers with intermediate
			 connecting members, braced with diagonal or cross braces.
(w) Working load. Load imposed by workers,
			 material and equipment.