Cal. Code Regs. Tit. 8, § 1662 - Boatswains' Chairs
(a)
Persons shall be trained and/or experienced in the use of boatswains' chairs
before being permitted to use such equipment.
(b) When a boatswains' chair is suspended
over an area traversed by employees, pedestrians or vehicular traffic, the
ground area immediately below shall be effectively blocked by barricades, or an
attendant shall be stationed to keep the area clear. Warnings signs shall also
be posted below.
(c) An employee
using a boatswains' chair shall wear a safety belt with attached lanyard
secured to a separate drop line or other means affording equivalent
safety.
(d) Rope attachment to a
block shall be by a thimble and splice.
(e) Hooks shall be provided with a means to
prevent accidental disengagement or a shackle shall be used in place of a
hook.
(f) Each double block of luff
(or watch) tackle shall be branded or otherwise clearly marked so as to
indicate the fully extended length in feet from block to block. A knot or
splice shall be made in the end of the line to prevent it from running through
the block.
(g) Thimbles shall not
be used where the chair connects to the hook.
(h) Tackle shall consist of rope equivalent
in strength to at least 5/8 inch rope of first grade Manila as well as
properly-sized blocks.
(i) The
chair shall be suspended from its four corners by means of rope slings. It
shall have a seat not less than 24 inches long by 10 inches wide and, if of
soft wood, 2 inches thick (1 1/8 inches if of oak or ash). It shall be
reinforced across the full width by cleats securely fastened to each end. The
seat may be constructed of material other than wood, provided the material used
is equivalent in strength to 2 inches of soft wood or 1 1/8 inches of oak or
ash. If constructed of material of equivalent strength, cleats across the full
width of the seat shall be provided unless structural analysis indicates that
they are not necessary. Other design and construction of equivalent safety and
strength may be substituted.
(j)
Boatswains' chairs with fiber rope slings shall not be used to support an
employee with welding, burning torch, sandblasting equipment, or chemicals
harmful to fiber rope. In such cases, the slings shall be at least 3/8 inch
wire rope, or equivalent. Further, the wire rope shall be protected against
burning or welding arc by covering with a rubber hose or other equally
effective means.
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(k) Fiber rope seat slings shall be of 5/8
inch Manila rope, or equivalent, reeved through the four seat holes so as to
cross each other on the underside of the seat.
(l) Boatswains' chairs, their supports and
all accessories shall be capable of supporting, without failure, at least 4
times the maximum load.
(m) Parapet
or cornice hooks or clamps used to support chairs shall be provided with rings
for tie-back use.
Notes
2. Amendment of subsection (b) filed 4-27-79; effective thirtieth day thereafter (Register 79, No. 17).
3. Renumbering and amendment of former Section 1662 to Section 1667, and renumbering and amendment of Section 1651 to Section 1662 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
4. Change without regulatory effect amending "Moused Hook" graphic in subsection (j) filed 6-25-2001 pursuant to section 100, title 1, California Code of Regulations (Register 2001, No. 26).
5. Change without regulatory effect repealing and adopting new illustration within subsection (j) filed 5-19-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 21).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
2. Amendment of subsection (b) filed 4-27-79; effective thirtieth day thereafter (Register 79, No. 17).
3. Renumbering and amendment of former Section 1662 to Section 1667, and renumbering and amendment of Section 1651 to Section 1662 filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
4. Change without regulatory effect amending "Moused Hook" graphic in subsection (j) filed 6-25-2001 pursuant to section 100, title 1, California Code of Regulations (Register 2001, No. 26).
5. Change without regulatory effect repealing and adopting new illustration within subsection (j) filed 5-19-2008 pursuant to section 100, title 1, California Code of Regulations (Register 2008, No. 21).
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