29 CFR 1910.28(e)

cprice-sewell on DSKDVH8Z91PROD with CFR

§ 1910.28

29 CFR Ch. XVII (7–1–09 Edition)

(13) Frames and accessories for scaffolds shall be maintained in good repair and every defect, unsafe condition,
or noncompliance with this section
shall be immediately corrected before
further use of the scaffold. Any broken,
bent, excessively rusted, altered, or
otherwise structurally damaged frames
or accessories shall not be used.
(14) Periodic inspections shall be
made of all welded frames and accessories, and any maintenance, including
painting, or minor corrections authorized by the manufacturer, shall be
made before further use.
(e) Outrigger scaffolds. (1) Outrigger
beams shall extend not more than 6
feet beyond the face of the building.
The inboard end of outrigger beams,
measured from the fulcrum point to
the extreme point of support, shall be
not less than one and one-half times
the outboard end in length. The beams
shall rest on edge, the sides shall be
plumb, and the edges shall be horizontal. The fulcrum point of the beam
shall rest on a secure bearing at least
6 inches in each horizontal dimension.
The beam shall be secured in place
against movement and shall be securely braced at the fulcrum point
against tipping.
(2) The inboard ends of outrigger
beams shall be securely supported either by means of struts bearing against
sills in contact with the overhead
beams or ceiling, or by means of tension members secured to the floor
joists underfoot, or by both if necessary. The inboard ends of outrigger
beams shall be secured against tipping
and the entire supporting structure
shall be securely braced in both directions to prevent any horizontal movement.
(3) Unless outrigger scaffolds are designed by a licensed professional engineer, they shall be constructed and
erected in accordance with table D–16.
Outrigger scaffolds designed by a registered professional engineer shall be
constructed and erected in accordance
with such design. A copy of the detailed drawings and specifications
showing the sizes and spacing of members shall be kept on the job.
(4) Planking shall be laid tight and
shall extend to within 3 inches of the

building wall. Planking shall be nailed
or bolted to outriggers.
(5) Where there is danger of material
falling from the scaffold, a wire mesh
or other enclosure shall be provided between the guardrail and the toeboard.
(6) Where additional working levels
are required to be supported by the
outrigger method, the plans and specifications of the outrigger and scaffolding structure shall be designed by a
registered professional engineer.
(f) Masons’ adjustable multiple-point
suspension scaffolds. (1) The scaffold
shall be capable of sustaining a working load of 50 pounds per square foot
and shall not be loaded in excess of
that figure.
(2) The scaffold shall be provided
with hoisting machines that meet the
requirements of a nationally recognized testing laboratory. Refer to
§ 1910.7 for definition of nationally recognized testing laboratory.
TABLE D–16—MINIMUM NOMINAL SIZE AND
MAXIMUM SPACING OF MEMBERS OF OUTRIGGER SCAFFOLDS
Light duty
Maximum scaffold load ...............
Outrigger size .............................
Maximum outrigger spacing .......
Planking ......................................
Guardrail .....................................
Guardrail uprights .......................
Toeboards (minimum) ................

25 p.s.f. .....
2×10 in ......
10 ft 0 in ....
2×9 in ........
2×4 in ........
2×4 in ........
4 in ............

13:35 Aug 19, 2009

Jkt 217113

PO 00000

Frm 00146

Fmt 8010

50 p.s.f.
3×10 in.
6 ft 0 in.
2×9 in.
2×4 in.
2×4 in.
4 in.

(3) The platform shall be supported
by wire ropes in conformity with paragraph (a)(22) of this section, suspended
from overhead outrigger beams.
(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.
(5) Each outrigger beam shall be
equivalent in strength to at least a
standard 7-inch, 15.3-pound steel Ibeam, be at least 15 feet long, and shall
not project more than 6 feet 6 inches
beyond the bearing point.
(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.

136

VerDate Nov<24>2008

Medium
duty

Sfmt 8010

Y:\SGML\217113.XXX

217113