wow what a coinkidink...I'm a GC and my own engineer!
I appreciate the thoughts etc of the post however I think we all know that the real issue at hand has nothing to do with a persons ability to crunch numbers and design trusses or loads and meet adopted code requirements. I have built trusses that are still functioning after 20 years.
I feel sure that I could modify a truss to perform to my expectations...but that's irrelevent given the audience of this forum. This isn't a DIY forum. This is a contractor forum. As soon as you provide a service for some one else...the subject changes completely.
The issue with truss modification has little to do with one's technical ability but rather his liability. It dosn't matter if a truss design or subsequent modification is adiquate or not. It only matters that you have the financial resources to back up your commercial endevors.
You can have all the degrees you want but if you don't have the insurance to back it up...they are meaningless. And it doesnt matter if you live in a state where in no license is a requirement or no insurance is a requirement. That willl not keep some one from sueing you.
But what do I know.
I have stopped by a few palaces where the building had improper bracing on piggy back trusses. Those top chords on the lower part have an immense amount of pressure on them and improperly braced is asking for a catastrophic collapse.What a lot of guys don't know about trusses is that under full load (snow or temporary construction loads) forces in puny 2x members can be in the thousands of pounds. But it takes that "full load" scenario to cause a problem. So trouble with violated or under-deisgned trusses may not show up for years, if ever. Engineers always think in terms of "worst-case" which is why I'm so flinchy about modifying a truss. Heck, for that matter, modifying any structural element.
Thanks for your input.
I've been around a little while, but not enough to take many chances. Or is that long enough not to take many chances? :laughing:That said, the less experienced contractors are the ones likely to get into a bind, without realizing it....of course, I have seen some old guys who fly by the seat of their pants do stuff they should not.
Tsk, tsk, Neo. Are you so old that you don't remember "Do what I say, not what I do!"? :laughing:I didn't mean to sound harsh, I guess I'm
just missing the point....again.
Tim introduced himself as an engineer so I'm thinking he does.The engineers designed that truss to function as one unit.
The truss builder built it to function as one unit.
You altered it.
It now has new performance characteristics.
Do you know what they are?
I agree with you to a point. Some of the largest, most complicated homes around need to have a hybrid system of trusses and rafters. I love stick framing a roof, but I also took the time to really study trussed roofs. There are good and bad.I'm with you Wallmax, I love a good complicated roof framing job. I have framed complicated roofs and when completed felt proud of how well it came out but I can't say I have ever been proud of a roof truss install.