Assalam o alaikum,
Dear seniors,
I am to design a two story frame structure in Seismic zone 3. UBC tells me about two SPECIAL SEISMIC LOAD COMBINATIONS. For Zone 1, 2 A, 2B I use ASD load combinations for footing stability design i.e. bearing pressure check, uplift check, sliding check and over turning check. But for zone 3 should i include this special seismic load combinations for footing design also?? Section 1612.4 tells, for both ASD and LRFD the following special load combos should be used
1.2D + f1L + 1.0Em and 0.9D + 1.0 Em...................... for both ASD nd LRFD same combination?? I am very much confused and need urgent reply... Jazak Allah...