Eurocode
Imposed Loads are referred to as Live Loads. Reducible Live Loads are those of Categories A to D. For loads indicated as Reducible, any horizontal member supporting 10 square meters or more of Reducible live load is reduced per EN 1991-1-1:2001 Eq (6.1):
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The Eurocode requires that for Categories C and D, the reduction factor αA be greater than or equal to 0.6. This is not done automatically by the program, but can be accomplished by specifying a limit to the Live Load Reduction of 40% in the Modeler using the command.
Storage Live Loads are those of Category E. The Live Load reduction on horizontal members is performed the same as for Reducible Live Loads except that the Ψo factor is different, as specified in the RAM Manager command.
For vertical members supporting Reducible or Storage loads, the reduction is based on Eq (6.2):
where| = | ||
| = |
No reduction is made on loads specified as Unreducible for either horizontal or vertical members.
No reduction is made on loads specified as Roof for either horizontal or vertical members.
It is important to note that the output lists the reduction factor as a percent by which the load can be reduced, rather than a load multiplier.