Question

Find:

The loading (W ) for floor beam B1 is_____ kips/ft.

The loading (W ) for floor beam B2 is_____ kips/ft.

The loading (P ) for girder G1 is______ kips.

The loading (W ) for girder G2 is_____ kips.

The uniformly distributed live load on the floor plan in the figure given below is 65 Ib/ft2. Consider the live load reduction if permitted by the ASCE standard 6@ 6.67'=40. C4 A-I B2 G1 B3 2@10. = 20. B4 C2 G3 B1 5@8'=40 C3 Cl 20'

Answer 1

BEAM-B1 FLOOR LOADS 65 psf Live Load Type of Beam Interior Beam As per Table of ASCE7, i) Edge beam without cantilever slab i) Edge beam with cantilever slab i Interior Beam iv) Cantilever Beam types of beams REDUCTION IN LIVE LOAD Tributary area of structural member 40 x 8 320 ft Since live load is less than 100 psf, it can be reduced as follows: Live Load Element Factor, Ku As per Table of ASCE7 Therefore 640 Since KLLAT is greater than 400 sq.ft, live can be reduced 15 Reduced floor live load L0.25 54.8 psf Uniformly distributed load on beam 54.8 x 8 438.4 plf

BEAM-B2 FLOOR LOADS Live Load 65 psf Type of Beam Edge beam without cantilever slab As per Table of ASCE7, i) Edge beam without cantilever slab ii) Edge beam with cantilever slab ii) Interior Beam types of beams iv) Cantilever Beanm REDUCTION IN LIVE LOAD 20 x 3.33 Tributary area of structural member 66.6 ft Since live load is less than 100 psf, it can be reduced as follows: Live Load Element Factor, KLu As per Table of ASCE7, Therefore, 133.2 Since K A is less than 400 sq.ft, live load SHOULD NOT BE REDUCED 15 Reduced floor live load Lo0.25+ KLL AT 100.8 psf Uniformly distributed load on beam 100.8 x 3 335.664 plf

GIRDER-G1 FLOOR LOADS Live Load 65 psf Type of Beam Interior Beam As per Table of ASCE7, i) Edge beam without cantilever slab ii) Edge beam with cantilever slab ii) Interior Beam types of beams iv) Cantilever Beanm REDUCTION IN LIVE LOAD Tributary area of structural member 20 x 13.33 266.6 ft Since live load is less than 100 psf, it can be reduced as follows: Live Load Element Factor, KLu As per Table of ASCE7, Therefore, 533.2 Since K Ar is greater than 400 sq.ft, live can be reduced 15 Reduced floor live load Lo0.25+ KLL AT 58.5 psf Uniformly distributed load on beam 58.5 x 13 779.805 plf

GIRDER-G2 FLOOR LOADS Live Load 65 psf Type of Beam Interior Beam As per Table of ASCE7, i) Edge beam without cantilever slab ii) Edge beam with cantilever slab ii) Interior Beam types of beams iv) Cantilever Beanm REDUCTION IN LIVE LOAD Tributary area of structural member 40 x 30 1200 ft Since live load is less than 100 psf, it can be reduced as follows: Live Load Element Factor, KLu As per Table of ASCE7, Therefore, 2400 Since K Ar is greater than 400 sq.ft, live can be reduced 15 Reduced floor live load Lo0.25+ KLL AT 36.2 psf Uniformly distributed load on beam 36.2 x 30 1086 plf