Current through Register 2024 Notice Reg. No. 38, September 20, 2024
(a) Erection, Climbing and Dismantling.
(1) The erection, climbing (up and down) and
dismantling of a fixed tower crane shall comply with the requirements of Title
8, Section 341.1(b)(2),
Sections 5010 through
5010.3 and other provisions of
these Safety Orders as applicable.
(A)
Employees engaged in the erection and/or dismantling of tower cranes and the
inspection, maintenance or repair related to such erection and/or dismantling,
when working at elevations 15 feet or greater over ground or other surfaces
shall be required to use fall protection as specified in Article 24 of the
Construction Safety Orders.
(2) Guys, braces and other supports shall be
employed as necessary to prevent damage or collapse of the equipment during the
erection and dismantling procedures.
(b) The unbraced, free standing portion of
the mast between the boom and the top support position shall be limited in
height to the distance recommended by the certified agent.
(c) When the certified agent requires the
mast to be secured in the shaftway of a structure, the structural members to
which it is secured shall be adequate to safely sustain all anticipated loads
including vibration.
(d) Tower
crane foundations and structural supports (including both the portions of the
structure used for support and the means of attachment) shall be designed by a
certified agent to prevent structural damage of such support.
(1) The controlling entity shall ensure the
tower crane foundations and structural supports are installed in accordance
with the manufacturer's or certified agent's instructions.
(2) The controlling entity shall provide a
written statement of compliance with subsection (d)(1), to the erecting entity
prior to erection or jump of the tower crane.
(3) The top of the support/foundation shall
be accessible and free of debris, materials and standing water. No materials
shall be stored on the support unless approved by a qualified person. The
foundation and fasteners shall remain accessible and visible for inspection at
all times.
(e) When the
mast sections are raised to a new position, measures shall be taken to prevent
damage or collapse of the crane assembly including vertical slippage of the
mast unit.
(1) Climbing procedures. Prior to,
and during, all climbing procedures (including inside climbing and top
climbing), the employer shall:
(A) Comply with
all manufacturer prohibitions.
(B)
Have a certified agent verify that the host structure is strong enough to
sustain the forces imposed through the braces, brace anchorages and supporting
floors.
(f)
Load Limit Device.
(1) The load limit device
shall be in effective operation and shall not be readjusted to handle loads
greater than those specified by the certified agent.
(2) In addition to the requirements of
Section 5000, whenever a load limit device
is unsealed, repaired, or readjusted, a qualified person shall perform any
testing necessary to ensure the continuing effective operation of the device. A
test load or device capable of measuring 110 percent of the certified agent's
load capacity shall be available at the job site.
(g) The load line shall be directly over the
load to be lifted.
(h) The operator
shall be stationed in a safe position where good visibility and control can be
maintained.
(i) Dangerous areas.
(1) Only employees directly involved in the
erection, climbing, and dismantling operations of tower cranes are allowed to
work in the area under the tower, jib, or rotating portion of the crane during
these operations.
(2) Additional
requirements for self-erecting tower cranes: Employees shall not be in or under
the tower, jib, or rotating portion of the crane during erecting, climbing and
dismantling operations until the crane is secured in a locked position and the
competent person in charge indicates it is safe to enter this area, unless the
manufacturer's instructions direct otherwise and only the necessary personnel
are permitted in this area.
(j) Addressing specific hazards. In addition
to the requirements in Section
5010.1(h)(1) through
(9), the A/D director shall confirm the
following:
(1) Foundations and structural
supports. Prior to erection/installation of tie-ins, the controlling entity
shall provide documentation to the A/D director that tower crane foundations
and structural supports are installed in accordance with the design.
(2) Backward stability. All cranes shall be
ballasted or counterweighted in accordance with the manufacturer's
recommendation to ensure stability.
(3) Wind speed. Operations shall not be
conducted when wind speed exceeds the speed tolerance recommended by the
manufacturer or, where the manufacturer does not specify this information, the
speed tolerance shall be determined by a qualified person.
(k) Plumb tolerance. Towers shall be erected
plumb in accordance with the manufacturer's specifications and verified by a
qualified person. Where the manufacturer does not specify plumb tolerance, the
crane tower shall be plumb to a tolerance within 1:500 (approximately 1 inch in
40 feet).
(l) Multiple tower crane
jobsites. Where more than one fixed jib (hammerhead) tower crane is installed,
the cranes shall be located such that the structural members of the cranes
cannot come in contact with one another. Cranes are permitted to pass over one
another.
(m) Counterweight/ballast.
(1) Equipment shall not be erected,
dismantled or operated without the amount and position of counterweight and/or
ballast in place as specified by the manufacturer or a certified agent familiar
with the equipment.
(2) The maximum
counterweight and/or ballast specified by the manufacturer or certified agent
familiar with the equipment shall not be exceeded.
1. New
section filed 8-29-86; effective thirtieth day thereafter (Register 86, No.
39).
2. Amendment of subsection (a)(1) filed 4-16-93; operative
5-17-93 (Register 93, No. 16).
3. New subsection (a)(1)(A) filed
5-18-93; operative 6-17-93 (Register 93, No. 21).
4. Amendment of
subsection (a)(1) filed 8-21-2000; operative 9-20-2000 (Register 2000, No.
34).
5. Amendment of subsection (a)(1) filed 1-3-2002; operative
2-2-2002 (Register 2002, No. 1).
6. Amendment of section heading and
section filed 7-26-2022; operative 7-26-2022 pursuant to Government Code
section
11343.4(b)(3)
(Register 2022, No. 30). Filing deadline specified in Government Code section
11349.3(a)
extended 60 calendar days pursuant to Executive Order N-40-20 and an additional
60 calendar days pursuant to Executive Order
N-71-20.
Note: Authority cited: Section
142.3, Labor
Code. Reference: Section
142.3, Labor
Code.
