Current through Register Vol. 47, No. 12, March 26, 2025
(a) Application of this section. This section
applies to all scaffolds constructed of metal except mobile types.
(b) Special approval required. Any metal
scaffold erected after June 1, 1972 to a height exceeding 125 feet above the
ground, grade or equivalent surface shall not be placed in service until such
scaffold has been granted a special approval. The plans and specifications for
any such scaffold shall be submitted to the board for such approval.
(c) Strength and factor of safety. The total
of live and dead loads imposed on any scaffold assembly shall not exceed
one-quarter of the ultimate strength of the members as determined by actual
test.
(d) Minimum uniform live
loads.
(1) Metal scaffolds shall be designed
and constructed to support safely all loads intended to be imposed thereon, but
in no case shall such scaffolds be designed or constructed to support uniform
live loads of less than the following:
(i)
Light duty scaffolds--25 pounds per square foot.
(ii) Medium duty scaffolds--50 pounds per
square foot.
(iii) Heavy duty
scaffolds--75 pounds per square foot.
(2) Metal scaffolds designed and constructed
for particular types of work shall support uniformly distributed live loads in
accordance with the following:
(i) Stone
masons--75 pounds per square foot.
(ii) Stone setters (no stone on scaffold)--25
pounds per square foot.
(iii)
Bricklayers--50 pounds per square foot.
(iv) Stucco applicators--50 pounds per square
foot.
(v) Lathers and
plasterers--50 pounds per square foot.
(vi) Carpenters--25 pounds per square
foot.
(vii) Miscellaneous (no
material on scaffold)--25 pounds per square foot.
(3) In addition to such live loads, metal
scaffolds shall be designed and constructed to support the dead loads, such as
platforms, frames, safety railings and other members.
(e) Safety railings. Safety railings
constructed and installed in compliance with this Part (rule) shall be provided
for every metal scaffold.
(f)
Access. Ladders, stairs or ramps shall be provided for access to and egress
from the platform levels of metal scaffolds which are located more than two
feet above or below the ground, grade, floor or other equivalent
level.
(g) Footings.
(1) Footings for metal scaffolds shall be
sound, rigid and capable of supporting the maximum design loads of such
scaffolds without settlement or deformation. Such footings shall be secure
against movement in any direction and shall have sufficient area to properly
transfer the vertical post or end frame loads of the scaffolds to the ground,
grade or equivalent surface without causing any unsafe condition.
(2) Metal base plates of not less than 16
square inches in area by one-eighth inch in thickness shall be provided for the
tubular ends of posts and for the legs of end frames which are in bearing
contact with the footings or other supporting surfaces.
(3) Where the ground, grade or other
supporting surface of a metal scaffold is not level, screw jacks or adjustment
jacks shall be used to support the tubular posts or end frames of the scaffold
so that the scaffold platform bearers are level. Such adjustment jacks shall be
so positioned that the threaded sections do not extend beyond the frames or
parts more than 12 inches.
(h) Tie-ins.
(1) Every metal scaffold shall be securely
tied into the building or other structure at intervals not to exceed 30 feet
horizontally and 26 feet vertically.
(2) Ties to any window cleaners' anchors are
prohibited.
