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Earthquake loads and the associated load combinations have been added to Sizer version 9 USA.
In Beam Loads view, Column Loads view, and Concept Mode loads view, the load type Earthquake is appended to the existing list of loads, for beams, columns, and in concept mode. It is available for all distributions.
The load type symbol E = earthquake has been added to the one-line legend in Analysis and Additonal Data.
The program includes those load combinations those derived from varieties of live loads like Impact loads and Live roof loads
The load combinations are shown as e.g. D + .75 (S + L + .7E), not D + .75 ( S + L ) + .525E. This corresponds to the D + .75 ( S + L) + .75 (0.7E) combination in ASCE 7 design code.
It appears in
Analysis report list of combinations
All design criteria are examined for earthquake loads, including deflection design..
For Load Duration factor CD , the program continues to use the Ten minutes Wind/Seismic input for both wind and earthquake loads, it does not allow independent input of Load Duration factor in loads view for wind and seismic. Note that NDS recommends the same factor - 1.6. (Table 2.3.2)
In the loads diagram in beam and column view, the colours used for each load type have changed. Impact, roof live and live loads are shown as varying shades of green as they are varieties if live loads. Earthquake loads are coloured dark purple.