The structure given below has 16 columns (floor continues all sides). The size o
ID: 1730353 • Letter: T
Question
The structure given below has 16 columns (floor continues all sides). The size of the total structure is (135 ft x 116 ft). Design the structure . This would include: 1. Design one interior beam 2. Design one interior girder 3. Design one interior girderFind the lightest W section for all members. Q1. The structure given below has 16 columns (floor continues all sides). The size of the total structure is (135 ft X116ft). Design the structure. This would include: Design one interior beam (10 points) 1. 2. Design one interior girder (10 points) Design one interior column(10 points) 3. Find the lightest W section for all members. L Note: Floor continues on all sides Girder Column Beam 3 at 15 ft 45 ft Dead load 80 psf Live load 100 psf Roof load 14 psf Roof live load 20 psf Snow load 28 psf You can choose to solve the above problem using STAAD Pro. List all assumptions that you make. If you solve using both methods, you will get a maximum of 10 point extra credit. You will get 5 points extra credit if you analyze but do not design in STAAD.
Explanation / Answer
Tributary width of interior beam=15 ft
Dead load=80 psf
Live load=100 psf
Factored area load=1.2*80 + 1.6*100 =256 psf
Factored uniform load on beam=256*15=3840 plf=3.84 kip/ft
Maximum moment in beam=3.84*38²/8=693.12 kip-ft
Lightest W section having flexural capacity greater than 693.12 kip-ft is w24x76
Factored load on girder at its every third point=2*3.84*38/2=145.92 kips
Maximum moment in girder=145.92*15=2188.8 kip-ft
Lightest w section having flexural capacity greater than 2188.8 kip-ft is w40x149
Tributary area of typical interior column=45*38 =1710 ft²
Factored load on column=256*1710/1000=437.8 kips
Lightest w section that hax compression capacity greater than 437.8 kips is w8x35
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