Steel joist properties
Steel joist properties
(OP)
Anyone know where I can get the cross-sectional properties of widely-used steel joists? I am using a structural software program and they don't have a built-in joist table (like for AISC shapes). They have a nice facility input prismatic sections by providing area, moment of inertias, etc. But where do I find tables for joists? I checked the 40th edition of the Steel Joist Manual from the Steel Joist Institute, but they only had load charts. No properties. I know steel joists are a bunch of angles and rods welded together thus, making their cross-section abstract, but aren't there standard shapes. Any help would be appreciated.






RE: Steel joist properties
A typical area of steel (y in^2) can be determined by the weight of the joist (x PLF)and the density of steel (490 PCF):
y (in^2) = x (PLF)*144 (in^2/FT^2) / 490 (PCF)
RE: Steel joist properties
RE: Steel joist properties
RE: Steel joist properties
RE: Steel joist properties
Steve1 is correct; the systems are proprietary and the complete section properties of the joists are not published. In fact,the exact properties of standard SJI joists can vary from manufacturer to manufacturer, even when they have they same designation.
RE: Steel joist properties
Where we can find SHOP DRAWINGS of the manufacturer or tags etc., we consult the manufacturer, we do the field measurements and they run they owsj for us. They're always helpful in these matters.