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Re: Support beam: steel vs woodFrom: info@builderswebsource.com
Category: Structural
Remote Name: 63.198.181.43
Date: 28 Oct 2002
Time: 02:36 AM
CommentsWithout knowing the tributary and point loads on the beam, we cannot specify the proper size. However, just as an example, we made the following assumptions for the purpose of comparing a glulam to steel beam. Assuming a 19-foot span, span/480 for live load (to provide a stiffer floor), span/240 for dead load, 400 PLF live load, 600 PLF LL+DL, one glulam choice is GLB 16F-V3 DF/DF 5-1/8" x 16-1/2". This weighs approximately 21 lbs./foot, or nearly 400 lbs for the beam. A steel beam capable of carrying a similar load would be a W12 x16, which is 4" wide x 12" deep. The 16 refers to the weight per foot. This beam would weigh in a little over 300 lbs. Again, the actual size of the beam in your case must be computed by a licensed structural engineer who can map out the precise loads on the beam. Furthermore, anchoring details are essential, as is foundation analysis. Builders Websource.
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