1619.3.3 Load reductions for temporary construction installations.
BC § 1619.3.3
Temporary construction installations shall be permitted to reduce the design environmental loads required by this chapter in accordance with the specifications below. An action plan for load reductions shall be required in accordance with Section 1619.5.
1.Seismic resistance. Temporary construction installations do not need to consider seismic design. These installations, other than supports of excavation, shall be designed for a minimum of 2 percent of the dead and live load as a service level lateral force. This load shall be used in lieu of seismic forces required by Section 1613 in load combinations including seismic forces. This load shall be distributed in proportion to the design loads, applied in any horizontal direction, and need not be combined with other environmental loads.
2.Wind. The wind design for temporary construction installations shall be computed as required by Section 1609. The basic wind speed used to design the temporary construction installation shall be permitted to be reduced by applying a factor of 0.8. Exceptions: The following are exceptions to item 2 concerning load reductions for wind design: 1. Mast climbers shall not be permitted to reduce wind loads.
3.Other environmental forces. Other environmental forces, including but not limited to snow, flood, ice, and temperature differential effects, shall be permitted to be reduced as appropriate for the limited seasonal exposure of the temporary construction installation.
