Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Ismfse said:I remember back in the day an older steel manual suggested Fy/800 x span (inches)
as a starting point to limit vibrations in floors and Fy/1000 x span for roof members
to limit ponding issues. I think it was in the "blue" steel manual.
Hokie93 said:The Fy/800 and Fy/1000 depth "suggestions" are in the Commentary to the Specification in the 7th, 8th, and 9th edition AISC Steel Construction Manuals
CANPRO said:Bottom line, I think we're over complicating a simple concept with no benefit. For example, BA's derivation above showing L/d = E/90f - using that derivation, I'm starting with a 36" beam for a 20' span.
IJR (OP) said:I need a reference text on this subject: How were the popular span-to-depth ratios for steel and reinforced concrete beams derived. I prefer the derivations, not general discussion.