Table 1.1 Member tributary areas and minimum design live loading. Beam Tributary area KLL L/Lo=0.25 + 15.0/(KLLAT)0.5 L/Lo min. Member AT = ½ x 25.0 x 12.5 x 2 2.0 0.85 0.5 bi-ei = 312.5 ft2 ei-hi 2.0 0.60 0.5 AT = ½ x 12.5 x 25.0 x 2 + di - ei 25.0 x 25.0 = 937.5 ft2 ei - fi gi - hi AT = ½ x (50+25) x 12.5 2.0 0.74 0.5 hi - ii = 468.75 ft2 ai - bi bi - ci ai - di AT = ½ x 25.0 x 12.5 di - gi = 156.25 ft2 ci - fi 2.0 1.0 0.5 fi - ii Step II. Estimate the distributed loads acting on the beams and bi - ei ei - hi b6 e6 (0.85x50 x25)/1000=1.06k/ft. h6 b5 e5 h5 bi ei b4 e4 h4 b3 e3 h3 b2 e2 h2 b1 e1 h1
Table 1.1 Member tributary areas and minimum design live loading. Beam Member Tributary area KLL L/Lo=0.25 + 15.0/(KLLAT)0.5 L/Lo min. bi-ei ei-hi AT = ½ x 25.0 x 12.5 x 2 = 312.5 ft2 2.0 0.85 0.5 di - ei ei - fi AT = ½ x 12.5 x 25.0 x 2 + 25.0 x 25.0 = 937.5 ft2 2.0 0.60 0.5 gi - hi hi - ii ai - bi bi - ci AT = ½ x (50+25) x 12.5 = 468.75 ft2 2.0 0.74 0.5 ai - di di - gi ci - fi fi - ii AT = ½ x 25.0 x 12.5 = 156.25 ft2 2.0 1.0 0.5 Step II. Estimate the distributed loads acting on the beams bi - ei and ei - hi b6 e6 b5 e5 h6 (0.85x50 x25)/1000=1.06k/ft. h5 b4 e4 b3 e3 b2 e2 bi ei h4 h3 h2 b1 e1 h1
CE470Ch1_Introduction.docx