Rationale

This ballot covers two changes to the Loads and Strengths section of F2291, specifically the discussion of appropriate load factors for combining wind and live loads: 1. In section 8.22.4.4 (2), it is intended that non-operation in wind loads still maintain loads imparted by movable equipment, without patrons but still with the self weight of the vehicle or “movable equipment”. It is possible that existing language could be interpreted to mean loads imparted from the motion of empty equipment. For most systems (such as a rollercoaster), these loads would be for vehicle, without patrons, in a stationary storage position. Language has been added to this section to clarify. 2. As stated in sections 8.22.4 and 8.24.4, the load factor modifications in the subsequent sections are intended for use along with load combinations in ASCE 7 (the current latest edition is ASCE 7-22). For international use of F2291, the local code accepted by the AHJ should be used, but in absence of a locally accepted code, the modifications listed to ASCE 7 would apply (as stated 8.22.3.1 and 8.24.3.1). For this reason, the continued reference to “ building code” or “local building code” in the subsequent sections is redundant and confusing. This language has been removed since it is already clear in 8.22.4 and 8.24.4 that this only applies to use of ASCE 7.