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| Subject:
deflection of beam
Category: Science > Physics Asked by: shadowsmom-ga List Price: $5.00 |
Posted:
17 Mar 2005 07:01 PST
Expires: 25 Mar 2005 06:28 PST Question ID: 496084 |
What would the deflection of a wide flange beam (wood) be at it's centerline - it is 20' long 8" deep - 32ppf. What would the deflection be @ 250 lb/ft? |
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| Subject:
Re: deflection of beam
From: jorgy-ga on 18 Mar 2005 12:09 PST |
Have you consulted the current edition of the army corps of engineers field manual FM 5-34 ? |
| Subject:
Re: deflection of beam
From: touf-ga on 24 Mar 2005 16:05 PST |
Well, it depends on what kind of wood you're talking about. This
affects the modulus of elasticity, or E. It also depends on the cross
sectional moment of inertia of your beam, or I.
Once you get those values, the equation for deflection simply becomes:
5*w*l^4
d = ---------
384*E*I
where d = deflection in inches
w = loading in lb/in
l = beam length in inches
E = Young's modulus in psi
I = cross sectional MOI in in^4 |
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