Large Collector - Deck Connection Detail
Large Collector - Deck Connection Detail
(OP)
I was wondering if anyone had any ideas or comments on the attached sketch.
Background:
This is for an existing gym expansion. Basically I have two, three sided boxes. I need to collect the shear between them and dump it into a small shear wall. The collector will a large deep built up beam or truss. My concern is that if I simply extend the existing deck to the new beam with a plate than the contraction of the roof deck may cause problems with the collector (leading to some sort of induced LTB failure). Any comments on this or suggested details that would allow for exp/contraction but transfer vertical load and deck shear?
Thanks!!
Background:
This is for an existing gym expansion. Basically I have two, three sided boxes. I need to collect the shear between them and dump it into a small shear wall. The collector will a large deep built up beam or truss. My concern is that if I simply extend the existing deck to the new beam with a plate than the contraction of the roof deck may cause problems with the collector (leading to some sort of induced LTB failure). Any comments on this or suggested details that would allow for exp/contraction but transfer vertical load and deck shear?
Thanks!!






RE: Large Collector - Deck Connection Detail
RE: Large Collector - Deck Connection Detail
EIT
www.HowToEngineer.com
RE: Large Collector - Deck Connection Detail
DaveAtkins
RE: Large Collector - Deck Connection Detail
RE: Large Collector - Deck Connection Detail
@wannabe ->Your dimensions are roughly correct. I suppose I could align them. What is your concern with deflection? What do you have in mind if they align. The existing will be removed and the new will carry both.
EIT
www.HowToEngineer.com
RE: Large Collector - Deck Connection Detail
DaveAtkins
RE: Large Collector - Deck Connection Detail
Because you asked for it, I did my best to come up with a connection detail (below) that would transmit shear while accommodating expansion and contraction. I've never used it before and my general experience with these kinds of things is that they ultimately get gummed up somehow and do not function as intended.
Like Dave, I don't think that you need an expansion joint and you'll surely save yourself a ton of headaches by omitting it. Among other things, you'd require some kind of roofing detail with a double parapet and flexible cap.
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.