(a) Only one employee for each fall or hanger
shall be allowed on this type of suspended scaffold. (See Plates B-24, B-26,
B-26-a and B-27-a, Appendix).
EXCEPTION: Single, power-driven units described in
Section 1667.
(b) Stirrups or slings shall be made of wire
rope of at least 9,000 pounds breaking strength, or of solid round or square
mild steel (reinforcing steel shall not be used) not less than ¾ inch
dimension, forged or welded into one piece. Loops in wire rope slings for the
use of bolsters shall be spliced. The top loop shall have a galvanized thimble
fastened in place with a clip.
(c)
Bolsters shall be 2-inch by 4-inch "selected lumber," or stronger material,
placed so that the 4-inch sides are vertical. An iron or steel bolt 6 inches
long and ¾ inch in diameter shall be fastened through wooden bolsters at
right angles to same not nearer than 3 inches to the end to prevent sling from
accidentally slipping off the end of bolster.
(d) Scaffold platforms shall be at least 14
inches wide. Planks of dressed 2-inch lumber shall consist of "structural
plank" free from damage affecting its strength. Where platforms are composed of
two 2-inch by 10-inch or two 2-inch by 12-inch dressed planks, side by side,
they shall be firmly cleated together so as to act as a unit. Maximum platform
width shall be 36 inches.
(e) The
span between hangers or falls shall not be more than 10 feet when the planks
are composed of two 2-inch by 10-inch planks or more than 12 feet when composed
of two 2-inch by 12-inch planks as permitted in Subsection
1660 (d). The span
between hangers or falls when being used with patented-type planks shall not
exceed the manufacturer's specifications. The platform shall not extend beyond
the hangers more than 18 inches. A bar or other effective means shall be
securely fastened at each end of the platform to prevent it from slipping off
the hanger.
(f) Ladder-Type and
Needle Beam-Type Platforms.
(1) Platforms
placed in service after April 18, 1999 shall comply with the American National
Standard (ANSI) Scaffolding-Safety Requirements, A10.8-1988, which is hereby
incorporated by reference. Platforms placed in service on or before April 18,
1999 shall comply with ANSI A10.8-1977, Safety Requirements for Scaffolding,
which is hereby incorporated by reference.
(2) Light metal-type platforms shall be
approved.
(g) Each
employee shall be provided with and use personal fall protection in accordance
with the requirements of Article 24. Lanyards shall be securely attached to
substantial members of the structure (not scaffold), or to securely rigged
lines, which will safely suspend the employee in case of a fall. In order to
keep the lanyard continuously attached, with a minimum of slack, to a fixed
structure, the attachment point of the lanyard shall be appropriately changed
as the work progresses.
(h) Hooks
supporting scaffolds or stagings shall be made of mild steel (reinforcing steel
shall not be used), free from flaws or other imperfections. Each hook shall, if
loaded to point of failure, be capable of supporting a load 4 times that to
which it will be subjected in service. The expected load per hook in service
shall include its share (normally half) of the total scaffold and rigging
weight plus the total weight of employees and movable tools or equipment, which
shall never be considered as less than 500 pounds. All hooks shall be provided
with rings for tie-back service. The ring should be fitted through a hole in
the hook not more than 5 inches from the hook point. Hooks shall be kept clean
at all times.
Each hook shall be tied back to a substantial object on
the roof with at least a ¾ -inch diameter Manila rope or
equivalent.
(i) Where the
rope blocks supporting scaffolds or boatswains' chairs are not attached
directly to hooks, the extension from the top block to the support shall be
wire rope at least ½ -inch in diameter, or equivalent, and sufficient
protection shall be provided to prevent this wire rope from chafing.
The sheaves of all blocks, consisting of at least one
double and one single block, shall fit the size and type of rope
used.
Notes
Cal. Code Regs. Tit. 8, §
1660
1.
Editorial correction in subsection (k) (Register 70, No. 48).
2.
Amendment of subsection (g) filed 5-21-75; effective thirtieth day thereafter
(Register 75, No. 21).
3. Amendment filed 11-14-75; effective
thirtieth day thereafter (Register 75, No. 46).
4. Amendment of
subsection (a) filed 4-27-79; effective thirtieth day thereafter (Register 79,
No. 17).
5. Amendment filed 7-24-87; operative 8-23-87 (Register 87,
No. 33).
6. Amendment of subsection (g) filed 7-2-98; operative
8-1-98 (Register 98, No. 27).
7. Amendment of subsection (f)(1)
filed 3-19-99; operative 4-18-99 (Register 99, No.
12).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code.
1. Editorial
correction in subsection (k) (Register 70, No. 48).
2. Amendment of
subsection (g) filed 5-21-75; effective thirtieth day thereafter (Register 75,
No. 21).
3. Amendment filed 11-14-75; effective thirtieth day
thereafter (Register 75, No. 46).
4. Amendment of subsection (a)
filed 4-27-79; effective thirtieth day thereafter (Register 79, No.
17).
5. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No.
33).
6. Amendment of subsection (g) filed 7-2-98; operative 8-1-98
(Register 98, No. 27).
7. Amendment of subsection (f)(1) filed
3-19-99; operative 4-18-99 (Register 99, No. 12).