Section SPS 334.23 - Foundations(1) GENERAL. (a) Amusement rides shall be supported and restrained to maintain stability during operation and in emergencies.(b) The foundation for an amusement ride shall conform to the specifications of the manufacturer.(2) PERMANENT FOUNDATION. Permanent foundations for amusement rides shall comply with chs. SPS 361 to 366.(3) TEMPORARY FOUNDATIONS. (a) Blocks and shims used as temporary foundations shall be of sound material capable of withstanding the loads applied during normal operation and in emergencies. Hollow concrete blocks shall not be used. Blocking in contact with supporting surfaces shall be of proper size to prevent settling.(b)1. Except as provided in subd. 2., the height of a system of blocks above any level shall not exceed the width of the base of that level, as illustrated in Figure 334.23.2. The department may approve a system of blocks not higher than twice the width of its base provided the stability of the amusement ride is not adversely affected and the amusement ride does not impart a horizontal load to the system of blocking. Note: This exception typically applies only to a small portion of the blocks which support a rigid structure (e.g., bumper-car enclosure), but not to thrill rides, rides with flexible structures, or tall structures or rides, such as slides and ferris wheels.
(c) Each piece of material used in a system of blocks shall be level and oriented so its height does not exceed the width of its base.(d) All blocks shall be aligned, the angles between blocks used in a crib shall be approximately equal and the load shall be distributed to prevent tipping.(e) Shims shall be limited to the minimum number required for leveling.(f) Blocking shall be secured in accordance with recognized safe practice.(4) ANCHORAGE. Amusement rides shall be staked, bolted, guyed, wind braced or otherwise secured in accordance with manufacturer's specification to prevent horizontal movement, such as rotating off blocking during an emergency stop or tipping over. View Image
Figure 334.23
SYSTEMS OF BLOCKS
Wis. Admin. Code Department of Safety and Professional Services SPS 334.23
Cr. Register, February, 1992, No. 434, eff. 3-1-92;CR 01-139: am. (2) (a) Register June 2002 No. 558, eff. 7-1-02; CR 02-127: am. (1), (2) (a), (b) and (4) Register May 2003 No. 569, eff. 6-1-03; correction in (2) (a) made under s. 13.92(4) (b) 7, Stats., Register February 2008 No. 626; CR 08-054: renum. (1) and (2) (a) to be (1) (a) and (2), cr. (1) (b), r. (2) (b) and (c), r. and recr. (4) Register December 2008 No. 636, eff. 1-1-09; correction in (2), (3) (b) 1. made under s. 13.92(4) (b) 7, Stats., Register December 2011 No. 672.