Collector elements (ASCE7)
Collector elements (ASCE7)
(OP)
Iam working in PEB industry, when we are designing the a building with Seismic load resistance system.
As per ASCE7 (sec 12.10.2) specify the over strength factor is applicable for collector elements (spices, connections, Bracings etc.,)
We are using the Metal building software(MBS), in which it exclude the Roof bracing for above stated seismic provision.
They justified that wall bracing will be max seismic effect when compare to roof bracing, hence it was ignored.
Please anyone comment on above stated.
As per ASCE7 (sec 12.10.2) specify the over strength factor is applicable for collector elements (spices, connections, Bracings etc.,)
We are using the Metal building software(MBS), in which it exclude the Roof bracing for above stated seismic provision.
They justified that wall bracing will be max seismic effect when compare to roof bracing, hence it was ignored.
Please anyone comment on above stated.






RE: Collector elements (ASCE7)
The overstrength factor is used to ensure an element remains elastic. My interpretation is that this requirement doesn't disappear if the wall bracing reaches it's maximum load first, so the roof braces should be designed for overstrength.
Brian C Potter, PE
Simple Supports - The history and practice of structural engineering.
ConstructionPic - Send annotated jobsite photos.
RE: Collector elements (ASCE7)