Cal. Code Regs. Tit. 8, § 1646 - Tower Scaffolds and Rolling Scaffolds, Wood or Metal
(a) The minimum dimension of the base of any
free-standing tower or rolling scaffold shall not be less than 1/3 the height
of the scaffold unless such scaffold is securely guyed or tied. For
restrictions when worker rides scaffold see paragraph (i) following.
(b) Construction and Erection.
(1) The uprights, ledgers, ribbons, braces,
and splices shall be equivalent to the standards specified in other applicable
Sections of these Orders. Railings are required if the platform is 7 ½
feet or more above grade. Railings shall be installed in accordance with the
provisions of Section
1644(a)(6).
NOTE: Toeboards or side screens may also be required. (See Section 1621.)
(2) The screw jack shall extend into its leg
tube at least 1/3 its length, but in no case shall the exposed thread exceed 12
inches.
(3) The uprights (legs of
rolling scaffolds) shall not exceed 24 inches without being braced according to
the manufacturer's specifications.
(c) Wheels or casters of rolling scaffolds
shall be provided with an effective locking device, and kept locked when
workers are climbing or working on the scaffold. At least 2 of the 4 casters or
wheels shall be a swivel type. All wheels or casters shall be properly designed
for strength and dimension to support at least 4 times the maximum intended
load.
(d) Joints of metal scaffolds
shall be locked together with lock pins, bolts or equivalent fastening,
including caster joints. Lock pins used must be of a locking type.
EXCEPTION: Screw jacks and guardrail posts.
(e) Platform planks
on rolling or tower scaffolds shall not project farther than 18 inches past
supports at the edges of the scaffold. An effective method of preventing
platform planks on rolling scaffolds from slipping off must be provided. The
nailing of cleats of 1-inch material on the underside of each projecting end,
or other equivalent means, will be acceptable. Platforms shall be tightly
planked for the full width of the scaffold except for any necessary entrance
openings.
NOTE: Refer to Orders 1621 and 1637(f) for regulations on required plank and platform sizes.
(f) Ladders. Ladders or other unstable
objects shall not be placed on top of rolling scaffolds to gain greater
height.
(g) Scaffolds on Vehicles.
When scaffolds are built on motor trucks or vehicles, they must be rigidly
attached to the truck or vehicle. The attachment must be made in a manner that
will develop the full strength of the scaffold in resisting an overturning
force.
(h) Trucks or vehicles that
have scaffolds attached to them shall have a device in use whenever employees
are on the scaffold that prevents swaying or listing of the
platforms.
(i) Riding. Employees
may ride on rolling scaffolds moved by others below if the following conditions
exist:
(1) The floor or surface is within 3
degrees of level, and free from pits, holes, or obstructions;
(2) The minimum dimension of the scaffold
base, when ready for rolling, is at least ½ of the height. Outriggers,
if used, shall be installed on both sides of staging;
(3) The wheels are equipped with rubber or
similar resilient tires. For towers 50 feet or over, metal wheels may be
used;
(4) The manual force used to
move the scaffold shall be applied as close to the base as practicable, but not
more than 5 feet (1.5 meters) above the supporting surface of the
scaffold;
(5) Before a scaffold is
moved, each employee on the scaffold shall be made aware of the move;
and,
(6) No employee shall be on
any part of the scaffold which extends outward beyond the wheels, casters, or
other supports.
(j)
Riding on a Self-Propelled Scaffold. One employee may ride on and move a
rolling scaffold while on the platform without assistance from others below
provided the following conditions are met:
(1)
All of the provisions in subsection (i) of this Section shall be met, except
that the scaffold need not be moved by others below;
(2) The scaffold platform shall not be more
than 4 feet above the floor level;
(3) The working platform shall be no less
than 20 inches in width with a maximum 1 inch space between platform
planks;
(4) Wheels or casters of
rolling scaffolds shall be provided with an effective locking device that is
used in accordance with subsection (c) of this section; or rolling scaffolds
shall be provided with an effective device that is used to prevent movement of
the scaffold when workers are climbing or working on the scaffold;
and,
(5) The use of power systems
such as motor vehicles, add-on motors, or battery powered equipment to propel a
rolling scaffold is prohibited.
(k) Training. Employees who ride on rolling
scaffolds and employees that assist in moving employees riding on a rolling
scaffold shall be trained in accordance with the requirements of this Section
and with the requirements of the Construction Safety Orders, Section
1509 to recognize the hazards
associated with riding on a rolling scaffold.
Notes
2. Amendment of subsection (b)(1) filed 8-3-76 as an emergency; effective upon filing (Register 76, No. 32).
3. Certificate of Compliance filed 10-8-76 (Register 76, No. 41).
4. Amendment of subsection (b) filed 9-5-79 as procedural and organizational; effective upon filing (Register 79, No. 36).
5. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
6. Editorial correction of printing error in NOTE following subsection (b)(1) (Register 92, No. 24).
7. Relettering of former subsections (g)-(i) as subsections (f)-(h), relettering of former subsection (f) as new subsection (i), amendment of newly designated subsections (i)(1)-(3) and new subsections (i)(4)-(k) filed 7-31-2009; operative 8-30-2009 (Register 2009, No. 31).
8. Editorial correction redesignating subsection (i)(5)(b) as subsection (i)(5)(6) (Register 2010, No. 34).
9. Editorial correction of subsection (i) (Register 2017, No. 41).
10. Change without regulatory effect amending subsection (a) filed 10-9-2017 pursuant to section 100, title 1, California Code of Regulations (Register 2017, No. 41).
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
2. Amendment of subsection (b)(1) filed 8-3-76 as an emergency; effective upon filing (Register 76, No. 32).
3. Certificate of Compliance filed 10-8-76 (Register 76, No. 41).
4. Amendment of subsection (b) filed 9-5-79 as procedural and organizational; effective upon filing (Register 79, No. 36).
5. Amendment filed 7-24-87; operative 8-23-87 (Register 87, No. 33).
6. Editorial correction of printing error in Note following subsection (b)(1) (Register 92, No. 24).
7. Relettering of former subsections (g)-(i) as subsections (f)-(h), relettering of former subsection (f) as new subsection (i), amendment of newly designated subsections (i)(1)-(3) and new subsections (i)(4)-(k) filed 7-31-2009; operative 8-30-2009 (Register 2009, No. 31).
8. Editorial correction redesignating subsection (i)(5)(b) as subsection (i)(5)(6) (Register 2010, No. 34).
9. Editorial correction of subsection (i) (Register 2017, No. 41).
10. Change without regulatory effect amending subsection (a) filed 10-9-2017 pursuant to section 100, title 1, California Code of Regulations (Register 2017, No. 41).
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