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span/load charts for steel C-channel floor joists?

JoeFrickinFriday

Mechanical
Apr 13, 2010
16
Hello all -

I'm a mech engineer, not a structural engineer, so my apologies if I get some of this terminology wrong. I have a mezzanine composed of 19W4 steel grating laid over steel C-channel joists. I want to understand the load capacity of those joists, but I'm not sure where to find relevant load/span charts.

The joists in question are formed from sheet steel, I think 11-gauge. They are three inches wide, with 1.5" lips. Some are 11" tall, others are 15 " tall. Here's a SolidWorks rendering of the two sizes shown side by side:


1742400138816.png

Any suggestions on where to go for load/span information on these things?
 
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