Just wondering what support types you guys use when modeling roof trusses? I've been using fixed/roller when solving by hand, but is there a more realistic, or accepted method when using software to model?
Thanks so much for the help.
So, when a truss designer goes out to design a truss he will also take the load combo's, or would that be the job of the engineer/architect specifying the truss?
For instance, if I tell them that we are in a 60psf GSL area, would they reduce that snow load for the pitch of the roof? Would I...
YEs, hanging from the top chord, but not even tied to every truss member, about every other or every three.
There is also four laterals running on each side that is fairly rigid and only supported from the mail trunk and at the drywall ceiling as it enters the ceiling below.
Quite sure I know what I am doing. I am a bit new to trusses, but I am trying to learn. I am a PE, but work under another PE with a great deal of experience. IT is always more beneficial to learn on my own, as opposed to just being told how to do it. So I go and run some numbers, think of...
Another quick Question....
When I plug-in my loads in the load combinations provided in ASCE-07 I am a bit unsure of how to apply.
For instance, 2.4 Load combination number 1 = D + F. Since I am trying to analyze a truss that has top chord DL, and a bottom chord DL, would I just sum the DL's...
Ok. That's what I thought. I just seemed to think that it was different for the analysis of existing members, as opposed to design of new members.
I am basically using the load combination in the ASCE-7 and analyzing from there.
Thanks
Charlie...
I am actually calculating the actual snow load (based upon ground snow load in our area, and then reducing it for pitch), adding in the DL of sheathing, etc, adding the DL from the HVAC installation and then determining web stresses.
Both the bottom chord and top chord are...
In NY it is a "Design Professional", and that is typically an engineer. Most muni's require and interpret that to mean engineer here.
I am more concerned with any conflicts that might inherent in a design build scenario where I design, and manage the construction activities by hiring...
Let me explain a bit better. If I want to analyze an existing truss for a rooftop installation I find the snow load, wind load, and dead loads. Then I find member loads and stresses, compare them with the lumber type used in each member.
Would I take the governing loads (typically the snow...
Writing this from phone. Please excuse mistakes....
When analyzing a truss what loads are considered concurrently? I thought that I had read for analysis of roof loads we don't have to consider them concurrent, but I can't find hard reference in any codes (or I'm just not looking in right...
