California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 4 - Construction Safety Orders › Article 29 - Erection and Construction › Section 1722.1 - Requirements for Lift-Slab Construction Operations

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Lift-slab operations shall be designed
					 and planned by a civil engineer currently registered in California who
					 determines that he/she has sufficient experience in lift-slab construction to
					 so design and plan the lift-slab operation. Such plans and designs shall be
					 implemented by the employer and shall include detailed instructions and
					 sketches indicating the prescribed method of erection. These plans and designs
					 shall also include provisions for ensuring lateral stability of the
					 building/structure during construction.
(b) Jacks/lifting units shall be marked to
					 indicate their rated capacity as established by the manufacturer.
(c) Jacks/lifting units shall not be loaded
					 beyond their rated capacity as established by the manufacturer.
(d) Jacking equipment shall be capable of
					 supporting at least two and one-half times the load being lifted during jacking
					 operations and the equipment shall not be overloaded. For the purpose of this
					 provision, jacking equipment includes any load bearing component which is used
					 to carry out the lifting operation(s). Such equipment includes, but is not
					 limited, to the following: threaded rods, lifting attachments, lifting nuts,
					 hook-up collars, T-caps, shearheads, columns, and footings.
(e) Jacks/lifting units shall be designed and
					 installed so that they will neither lift nor continue to lift when they are
					 loaded in excess of their rated capacity.
(f) Jacks/lifting units shall have a safety
					 device installed which will cause the jacks/lifting units to support the load
					 in any position in the event any jack/lifting unit malfunctions or loses its
					 lifting ability.
(g) Jacking
					 operations shall be synchronized in such a manner to insure even and uniform
					 lifting of the slab. During lifting, all points at which the slab is supported
					 shall be kept within one-half inch of that needed to maintain the slab in a
					 level position.
(h) If leveling is
					 automatically controlled, a device shall be installed which will stop the
					 operation when the one-half-inch tolerance set forth in Section
					 1722.1(g) is
					 exceeded or where there is a malfunction in the jacking (lifting)
					 system.
(i) If level is maintained
					 by manual controls, such controls shall be located in a central location and
					 attended by a competent person while lifting is in progress. The competent
					 person must have previously operated the type of manually controlled lifting
					 equipment being used.
(j) The
					 maximum number of manually controlled jacks/lifting units on one slab shall be
					 limited to a number that will permit the operator to maintain the slab level
					 within specified tolerances of section
					 1722.1(g), but in
					 no case shall that number exceed 14.
(k) No employee, except those essential to
					 the jacking operation, shall be permitted in the building/structure while any
					 jacking operation is taking place unless the building/structure has been
					 reinforced sufficiently to ensure its integrity during erection. The phrase
					 "reinforced sufficiently to ensure its integrity" used in this section means
					 that a civil engineer currently registered in California, independent of the
					 engineer who designed and planned the lifting operation, has determined from
					 the plans that if there is a loss of support at any jack location, that loss
					 will be confined to that location and the structure as a whole will remain
					 stable.
(1) Under no circumstances, shall any
					 employee who is not essential to the jacking operation be permitted immediately
					 beneath a slab while it is to be lifted.
(2) For the purpose of section
					 1722.1(k), a
					 jacking operation begins when a slab or group of slabs is lifted and ends when
					 such slabs are secured (with either temporary connections or permanent
					 connections).