Sorry guys, I'm talking about deflections you can barely see. The FF and FL numbers is what the special inspector is complaining about.
The deck, beams, girders all fall within our normal deflection limits
New building. The inspector is saying the elevated slab is just barely out of spec for floor flatness and floor levelness. Is there any reason why the architect should be forwarding this issue to the structural engineer? Never have heard of this problem on any project before.
I'd think as...
Bottom line, it's going to cost engineers quite a bit for the software, cost engineers more to use the software (training and complexity), cost engineers more time to coordinate all the little details, for the same crappy fee....all for what? Just to reduce a few RFI's? I dont see it catching...
Because this is an architectural building, not a nice rectangular box.
Most of the roof does slope parallel with the longspan joists, but at one end where transitions into another element of the building I have this situation.
dik,
Not sure you understand the problem. Due to the configuration of the roof, the slope runs PERPINDICULAR to the long dimension of the joist. Therefore, along the entire length of the joist, the deck will only hit one of the oustanding angle legs of the top chord.
Longspan roof deck on longspan roof joists. The profile of the roof required the deck to slope perpindicular to the joist.
Is the deck required to sit flat on the joist? All i see is a 1 1/2" bearing length requirement just to prevent slip off.
Should the joist be rotated about it's long...
Nope, theres no problem with it. If there were, there wouldnt be any point to galvanizing anything.
It's when you start dealing with metals like copper do you have to worry.
There is one producer of synthetic fiber that can be used as flexural reinforcement on a slab on grade application. Of course, the dosage rates to achieve this are pretty high, in the range of 7 lb/cu yd for a 6" slab.
There are no fiber producers that will tell you they can resist the...
Just found this elswhere. http://www.graceathome.com/pages/decking_faq_corrosion.htm#EIGHT
Can I use felt, building paper, housewrap or similar materials as barriers to prevent corrosion?
No. These materials may not effectively separate the dissimilar metals in the wood and in the metal...
Isnt felt paper pourous? If there is some literature out there that covers this subject, please post it up. I've seen felt paper used like this on rare occasion, but I've never seen anything saying that it actually works.
I'm not aware of any gasket material that will serve this purpose...
No, they're lightgage roof trusses. The contractor goofed the t/steel low by 1 1/4" and is looking to make up the difference with wood blocking. Per code and architect, that wood needs to be fire treated.
I have a steel beam with a wood 2x nailer to allow roof truss attachment. The nailer must be fire treated. How do you prevent the corrosion of structural steel? Are there any products out there that isolate the steel from the treated wood?
Depends. The owner will be pissed if you make a heavy building just to make it easy on the contractor, but will be happy if you design something that gets built on schedule. You gotta balance the two, and I guess that just comes with experience of knowing what things are commonplace.
Yes, gluelams are curvable....much more than small cambers. Call your local rep, they can get some pretty tight radiuses. Also, look at www.apawood.com, there are case studies showing curved gluelams.
What are the rules about Component and Cladding wind pressures when designing a single family residence? I'm designing the MWFRS per IBC pressures, but do I return to the IRC for the component and cladding pressures? IRC is showing fastest mile wind speeds and its not clear how to direct the...
The amount of $$ to increase the structure to accomodate these construction loads > the amount of $$ the contractor passes on as savings to the owner. Therefore it's not typically done unless the owner is the contractor.
I agree that it's giving out a free service, no doubt about it. Though...
JAE,
I see your point of view, but think you're making a mountain out of a molehill for something like a scissor lift. If you go conservative and document correctly, doing this yourself will save yourself money and liability issues in the long run.
I'm not the contractor's favorite guy out...
I usually do my best to answer this question with my liability in mind because #1 He will not likely hire an engineer to calc it if you deny him, and if something fails, you're going to spend more unrecoupable fee in litigation than the three minutes it takes to give an answer. #2 You are the...
A plumbing leak caused the contractor to cut out a 5'x5' section in the newly poured 4" slab on grade. Non PT. Just WWF. Light loading. They had to dig down and refill the subgrade after the patch.
I just want to see if anyone has any recommendations for a repair product or procedure...
