Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) General. A
Civil or Mechanical Engineer registered in the State of California shall
prepare calculations and/or plans substantiating the structural integrity of
all facets of the complete installation, including the eyebrow sleeves, roof
davit systems, roof outrigger beams, and roof tiebacks. Such plans shall be
available to the Division at the installation site.
(b) Projecting Ledges or "Eyebrows" at Roof
Level.
(1) Those buildings so designed that
projecting ledges or "eyebrows" at the roof or intervening levels prohibit the
normal suspension of ropes supporting suspended scaffolds, shall be provided
with sleeves that extend through the ledge or eyebrow. The minimum inside
diameter of the sleeve shall be 6 inches to permit the passage of shackles,
sockets, clamps and other rigging devices. The center-on-center spacing of
sleeves shall be consistent with the length of the suspended scaffold to be
utilized, but in no case shall this spacing exceed 24 feet for transportable
scaffolds. Sleeves shall not be used as a rigging point unless securely
anchored to the structure and be capable of supporting the rated load with a
minimum safety factor of four.
NOTE: In lieu of the use of sleeves, other means of
scaffold support, such as soffit monorail systems, etc., that offer equivalent
safety and are acceptable to the Division, may be provided.
(2) Each sleeve assembly or each scaffold
support system shall be provided with a securely affixed durable and readily
visible metal plate bearing the rated load and installer's name in letters at
least 1/4 -inch in height. (Title 24, Part 2, Section
2-8505(b).)
(c) Roof
Davit Systems.
Roof davit systems specifically shall comply with
applicable provisions of Article 6 and the following:
(1) Each davit shall be provided with a
securely affixed, durable and readily visible metal plate bearing the following
information in letters at least 1/4 -inch in height:
(A) The davit's rated load, based upon a
safety factor of 4.
(B)
Manufacturer's name.
(C)
Precautionary warning message prohibiting use of the davit within 10 feet of
high-voltage lines.
(2)
Provisions shall be made to easily rotate davits while on the scaffold platform
or boatswain's chair unless the platform may be safely repositioned inboard or
outboard without the necessity for personnel to stand on unguarded roofs or
ledges unless protected by a personal fall restraint system complying with the
requirements of Section
1670 of the Construction Safety
Orders.
(3) Portable davit systems
shall comply with the applicable provisions of Article 6. (Title 24, Part 2,
Section 2-8505(c).)
(d)
Outrigger Beams.
(1) Outrigger beams shall
not be employed on buildings exceeding 130 feet in height unless acceptable to
the Division. All outrigger beams shall be designed to support the rated load
imparted by the suspended scaffold or boatswain's chair with a safety factor of
at least 4. Outrigger beams shall not extend more than 6 feet beyond the face
of the building. Only steel or high strength alloy beams shall be used. The
inboard end of outrigger beams, measured from the fulcrum point to the
anchorage point, shall be not less than 1 1/2 times the outboard end in
length. The fulcrum point of the beam shall rest on leg(s) or equivalent
supports securely attached to the beam and so arranged as to prevent lateral
overturning of the beam. Bearing pads shall be securely affixed to each support
and shall be of sufficient area to safely distribute imposed loads to the roof
structure. The inboard ends of outrigger beams shall be securely anchored by
means of tension members (tie-down) affixed to the structural frame of the roof
in such a manner that applied forces are resisted within allowable limits
affording a safety factor of at least 4. All tie-down fittings at the inboard
end of the beam shall be of a type that vibration effects shall not produce
accidental disengagement. Safety hooks for beam tiedown purposes shall not be
used. The use of counterweights at the inboard end of mobile and fixed
outrigger beams are prohibited.
(2)
The use of counterweights on the inboard end of portable or transportable
outrigger beams shall be permitted only when the following conditions have been
met:
(A) The building on which the
counterweight beam is to be used, was constructed prior to July 23,
1990.
(B) The building was not
designed for other suspension systems.
(C) An Operating Procedures Outline Sheet
(OPOS) shall be developed in accordance with Section
3282(p) of these
orders.
(D) The counterweights
shall be secured to the inboard ends of beams and shall consist of non-flowable
solid materials (e.g., concrete, steel, etc.).
(E) The outrigger shall be secured with a
tie-back to a verified anchorage on the building during the entire time of use.
The anchorage shall be designed to have a safety factor of not less than four
based on the rated capacity of the outrigger.
(F) The counterweight shall provide a
stability factor of at least 4 against overturning or upsetting of the
outrigger.
(G) Each outrigger shall
be designed by a registered engineer to support a load of 4 times the rated
hoist capacity or the total load whichever is greater. Outrigger beams shall
have a minimum rated capacity of 1000 pounds.
(H) The outrigger beam shall be secured
against horizontal movement when in use.
(I) Portable outriggers weighing more than 80
pounds shall be provided with a stable means for its transport (wheels or
cart).
(J) Each outrigger shall be
so located that the suspension wire ropes, for two point suspended working
platforms, are hung parallel.
(K)
The parts of sectional outrigger beam(s) (i.e. an outrigger beam(s) consisting
of more than one piece) shall be identified (e.g. numbered, color-coded). Parts
shall not be interchanged or substituted except with the approval of the
manufacturer.
(3) Each
outrigger beam shall be provided with a securely affixed, durable and readily
visible metal plate bearing the following information in letters at least
1/4 -inch in height:
(A) The beam's rated
load.
(B) Manufacturer's
name.
(C) Precautionary warning
message prohibiting use of the beam within 10 feet of high-voltage lines.
(Title 24, Part 2, Section
3105
A.4.2.)
(e)
Portable Outrigger Beams. The use of portable outrigger beams shall comply with
the applicable provisions of Article 6. (Title 24, Part 2, Section
2-8505(d).)
(f) Roof Tie-Backs.
(1) Every building constructed 3 stories or
36 feet or more in height, shall have roof tie-backs or other permanent devices
installed at the roof level for the purpose of securing or tying back suspended
scaffold hooks or clamps and safety lines.
EXCEPTIONS:
1.
Roof tie-backs are not required on buildings employing other acceptable means
of permanently installed roof top maintenance systems specified in this Article
or Article 6.
2. Roof tie-backs are
not required on buildings constructed up to 4 stories or 48 feet in height when
building maintenance can be accomplished using extension tools, ladders,
approved ground equipment such as scaffolds, or aerial devices designed and
used for positioning personnel.
(2) Such devices should be spaced at
approximately 12-foot intervals; however, the spacing shall depend primarily on
the availability of roof structural framing members of sufficient strength to
safely carry applied loads. Tie-backs may be installed in structural parapets
that are of adequate strength to sustain applied loads, but, placement shall be
as close to the roof level as practicable. Design criteria for tie-backs shall
be as follows:
(A) Roof tie-backs shall have
at least a 2-inch inside diameter closed "eye."
(B) Tie-back assembly shall be hot-dip
galvanized or afforded equivalent corrosion resistance.
(C) Assembly and anchorage provisions
adequate to sustain a 5000 pound load applied in any direction without
permanent deformation.
(3) Suspended scaffolds shall not be
permitted unless roof tie-backs or equivalent anchorages are
provided.
(g) Parapets of
Excessive Height. Where building parapet heights exceed 42 inches, special
provisions shall be employed to provide a safe means of access to the top of
the parapet for rigging purposes if such access is necessary to the safe
performance of the work. If such support systems as davit/sockets, parapet
hooks or clamps, etc., are utilized at the top of parapets, a catwalk platform
meeting the applicable sections of these orders, or other equivalent means of
affording access for the safe performance of the work shall be provided. (Title
24, Part 2, Section 2-8505(f).)
1.
Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No.
29).
2. Amendment filed 7-26-78; effective thirtieth day thereafter
(Register 78, No. 30).
3. Editorial correction of subsection (c)(1)
(Register 79, No. 17).
4. Editorial correction filed 10-7-83;
effective thirtieth day thereafter (Register 83, No. 41).
5.
Amendment filed 9-12-85; effective thirtieth day thereafter (Register 85, No.
37).
6. Renumbering of section 3291 to section
3289 and renumbering and amendment
of section 3292 to section 3291 filed 3-9-93;
operative 4-8-93 (Register 93, No. 11).
7. Amendment of subsection
(f)(1) and NOTE filed 4-22-96; operative 5-22-96 (Register 96, No.
17).
8. Change without regulatory effect redesignating former
subsection (f)(3)(A) to new subsection (f)(4) filed 6-22-98 pursuant to section
100, title 1, California Code of
Regulations (Register 98, No. 26).
9. Amendment of subsections (d)
and (d)(1), new subsections (d)(2)-(d)(2)(K), subsection renumbering and
amendment of newly designated subsection (d)(3)(C) filed 7-23-98; operative
8-22-98 (Register 98, No. 30).
10. Amendment of subsections (c)(1)
and (c)(2) filed 3-31-2000; operative 4-30-2000 (Register 2000, No.
13).
11. Amendment of subsections (a), (f)(1) and (f)(2)(A)-(C),
repealer of subsection (f)(3), subsection renumbering, amendment of newly
designated subsection (f)(3) and amendment of NOTE filed 3-27-2007; operative
4-26-2007 (Register 2007, No. 13).
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code.
