Deflection opinions sought
Deflection opinions sought
(OP)
Hi all, have a roof truss that I'm designing in a Gymnasium. Truss spans 80' and supports 40'owsj each side and also supports a large folding wall accordian door divider. Thoughts on defelection limits and operability of the door. The dominate gravity load is snow. Thanks.






RE: Deflection opinions sought
RE: Deflection opinions sought
RE: Deflection opinions sought
BA
RE: Deflection opinions sought
RE: Deflection opinions sought
Timelord
RE: Deflection opinions sought
RE: Deflection opinions sought
RE: Deflection opinions sought
OHIOMatt, well it's a school so the door is used regularily through the winter and oddly we approached our design snow loads about a decade ago during an ice storm.....when schools were in use. Regardless, the full snowload is used and there is a requirement for operability at that design condition.
RE: Deflection opinions sought
Obviously I don't know all of the variables that you're dealing with, but it may be worth considering a truss which supports only the weight of the partition and is independent from the truss supporting the roof load. It may be more economical to design the extra truss taking the small load of the partition to the stringent deflection criteria, and allow the building's truss to adhere to less ridiculous deflection criteria. As Timelord hinted, (in this case anyway) this truss would already deflect under its own weight pre-install of the partitions track, so, if the track is installed level then the truss would only have to resist the additional deflection due to load from the partition.
Once again, I hope the architect gives you a helpful response!
RE: Deflection opinions sought
RE: Deflection opinions sought
Dik
RE: Deflection opinions sought
RE: Deflection opinions sought
RE: Deflection opinions sought
RE: Deflection opinions sought
If there's no bottom track, what stops the partition from sliding from a wind load if a gym door is open (which happens a lot, and gyms usually have a lot of doors).
Also, gym partitions are pretty large areas, do you design for 5psf wind load on the partition for out of plane load on the truss or take some smaller load?