Note: For metric equivalents; 1-ft = 0.30
Figure J2-7. Seismic force diagram for supporting legs and braces
Dead load = (Wp1 + Wp2)/4 = (54.6k + 5k)/4 = 14.9k (66.3KN)
Pu = 1.2(14.9k) + 47.3k = 65.2k (290.0KN)
Check column capacity;
φc Pn = φc Fcr A g = 129.4 k (575.6KN) (calculated previously)
φc Pn = 129.4 k > 65.2 k = Pu
O.K.
(575.6KN > 290.0KN)
Design brace;
Determine deign loads (see Figure J2-7);
Fbrace = ( Fbrace ) 2orz + (Fbrace ) 2ert = 2(24.7 k ) 2 = 34.9 k (155.2KN)
h
v
Compression;
J2-9
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