Newsgroups: rec.crafts.metalworking
Subject: allowable uniform load for steel channel?

Grant:
You might look in the "Machinery Handbook" if you have one
available. Assuming an elastic modulous of 30,000,000, the formulas there
indicate, for a beam 8 ft long with a 4000 lb load in the center, in
pounds/sq.in and inches:

Channel max stress deflection
3 x 4.1 475247 12.45
3 x 5 412017 9.93
3 x 6 358208 8.04
4 x 5.4 339222 7.69
4 x 7.25 279883 5.66

The above is for the channel appearing as a u, ie, the 3 or 4 inch
dimension parallel to the ground. Vertical to the ground is:

Channel max stress deflection
3 x 4.1 87272 1.47
3 x 5 77419 1.32
3 x 6 69565 1.19
4 x 5.4 49740 .63
4 x 7.25 41921 .53

Handy book, the Machinery Handbook.

Hul
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