R 408.42533 Lift-slab operations.

Rule 2533. (1) A registered professional engineer who is qualified in lift-slab operations shall design and plan lift-slab operations. An employer shall implement the plans and designs and shall include detailed instructions and sketches that indicate the prescribed method of erection. The plans and designs shall also include provisions for ensuring lateral stability of the building or structure during construction. (2) An employer shall ensure that jacks are marked to indicate the rated capacity established by the manufacturer. (3) An employer shall ensure that jacks are not loaded beyond the rated capacity established by the manufacturer. (4) An employer shall ensure that jacking equipment is not overloaded and the threaded rods and other members that transmit loads to the jacks are capable of supporting not less than 2 1/2 times the load to be applied. Jacking equipment shall include all of the following: (a) Jacks and other lifting units. (b) Lifting angles. (c) Lifting nuts. (d) Hook-up collars. (e) T-caps. (f) Shearheads. (g) Columns and footings. (5) An employer shall ensure that a jack is designed and installed so that it will not lift or continue to lift when it is loaded in excess of its rated capacity. (6) An employer shall ensure that a jack has a safety device installed that will cause the jack to support the load in any position if the jack malfunctions or loses its lifting ability. (7) An employer shall ensure that jacking operations are synchronized to ensure even and uniform lifting of the slab. An employer shall ensure, that during lifting, all points of the slab support are kept within 1/2 of an inch of that needed to maintain the slab in a level position. (8) If leveling is automatically controlled, then an employer shall ensure that a device is installed which will stop the operation when the 1/2-inch tolerance specified in subrule (7) of this rule is exceeded or when there is a malfunction in the jacking system. (9) An employer shall ensure that the maximum number of manually controlled jacks on 1 slab is limited to a number, which shall not be more than 14, that will permit the operator to maintain the slab level within specified tolerances. The controls shall be located near a qualified person. (10) An employer shall ensure that an employee, except for an employee who is essential to the jacking operation, is not permitted in the building while any jacking operation is taking place. For the purpose of this subrule, a jacking operation begins when a slab or group of slabs is lifted and ends when the slabs are secured with either temporary connections or permanent connections. (11) An employer shall ensure that an employee is not permitted under a slab during jacking operations. (12) An employer shall ensure that all welding on temporary and permanent connections is performed in accordance with the requirements of the American welding society standards AWS D1.1/D1.1M, “Structural Welding Code Steel,” 2002 edition, and AWS B1.10, “Guide for the Nondestructive Examination of Welds,” 1999 edition. These standards are adopted by reference in R 408.42503. An employer shall ensure that the welders are familiar with the welding requirements specified in the lift-slab plan and specifications. (13) An employer shall ensure that load transfer from jacks to building columns is not executed until the welds on the column shear plates are cooled to air temperature. (14) An employer shall ensure that jack-lifting units are positively secured to building columns so that they do not become dislodged or dislocated. (15) An employer shall ensure that equipment is designed and installed so that the lifting rods cannot slip out of position or the employer shall initiate other measures, such as the use of locking or blocking devices, that will provide attachments and prevent components from disengaging during lifting operations. (16) Lifting devices, other than jacks covered by subrule (4) of this rule, shall be of sufficient strength and design to provide a safety factor not less than 5 times the working load.