[TheForge] Re: moment of a beam

[Kenneth Mayer]

>Date: Sat, 21 Oct 2006 00:40:05 -0500
>From: "Dave Mudge" <dave at magichammer.net>
>
>I am looking for the on-line tables or if anyone has tables or charts
>for finding the safe working load limit of a specific size beam, the
>"moment" of a beam.
>This is a   W-18, 50 #/foot, depth of 17-5/8", span of 15feet.
>
>If you can point me in the right direction or if you happen to know
>the answer, please contact me here: dave at magichammer.net
>thanks dave mudge

Per the AISC Manual of Steel Construction:
for 36,000 psi yield steel, a 15'span of laterally supported W18x50 will carry 145,000 pounds with 1/360 deflection, configured as a simple end-supported beam.  For 50 ksi steel its 202,000 pounds.
I=800 in^4
S=88.9 in^3
r=7.38 in
A=14.7 in^2

W18x50 has a specified depth of 17.99" with flange width of 7.495", web thickness 0.355" and flange thickness 0.570".  None of the W18 family has a 17-5/8 depth spec.

Ken
:-)