Steel Roof Truss
Steel Roof Truss
(OP)
Hi I am designing a steel roof truss for the community building . In the roof truss, I have to use 16mm as the thickness of the gusset plate. i need to check buckling out-of-the-plane of the truss. if anyone can give an idea ho to do this , its really helpful. Thanks






RE: Steel Roof Truss
I would assume this truss has some form of roof trusses/joists framing into it. Therefore it's likely the top chord will be adequately braced by this. You should provide bottom chord bridging to ensure the bottom chord does exceed slenderness requirements for elements in tension (or compression if you are expecting there to be load reversal).
Once you have provided the bracing for the top and bottom chords as indicated above, I'd bet buckling is a non-issue for the truss as a whole.
RE: Steel Roof Truss
1) Use the Whitmore section concept to work out an effective width of the effective "column" within the gusset.
2) Determine the length of your effective column as the distance between points of rotational restraint at the connected members. Some folks use K = 1.0; others K = 0.7.
3) Design the effective column within the gusset using the usual AISC provisions for compression members.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Steel Roof Truss
The guide can be found for free at www.steelconstruction.info/File:SCI_P358.pdf?internal_link
RE: Steel Roof Truss
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Steel Roof Truss
It's great being European, that is, if you like navigating the thousands of pages and cross-references of the Eurocodes and their NDP's... :)