Live loads
Snow 20 psf
People _____psf
Furniture _____psf
Other _____psf
Dead loads Assume 90 psf
Total __110___psf
Use A36 steel (36000 lbs)Beam loadingtotal load*tributary width
Determine Allowable Bending Stress.2/3*steel yield strength
24,000
Determine Maximum momentloading*length of beam squared divided by 8
15,468.75
Determine Section Modulus Required for Bending.
7.679 in cubed
Max moment divided by allowable bending stress
.645
Determine allowable deflection length of beam divided by 360
.5 in
W10X15 beam works
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