Open Web Joists and Shear Transfer
Open Web Joists and Shear Transfer
(OP)
i attended a seminar on open web joists recently that covered shear transfer from the diaphragm to the lateral frames. SJI had suggested placing HSS2.5x2.5's between joists and welding them to the supporting member and welding the deck to the hss. while this makes complete sense to me, a steel fabricator spoke up and said that he had seen the detail once in the last 7 years.
this got me thinking and I wanted to conduct an informal survey to see how others are transferring diaphragm shear when using open web joists with steel lateral frames. have you ever used this detail? if i were to use it, my clients would scream that i was overdesigning. your thoughts would be appreciated, but please...i understand the mechanics of the detail.
this got me thinking and I wanted to conduct an informal survey to see how others are transferring diaphragm shear when using open web joists with steel lateral frames. have you ever used this detail? if i were to use it, my clients would scream that i was overdesigning. your thoughts would be appreciated, but please...i understand the mechanics of the detail.






RE: Open Web Joists and Shear Transfer
Mike McCann
MMC Engineering
RE: Open Web Joists and Shear Transfer
If the shear is low enough, you can use the rollover capacity of the joist seat (I believe allowable is conservatively taken as 1000# for 2.5" joists).
RE: Open Web Joists and Shear Transfer
Cheers,
YS
B.Eng (Carleton)
Working in New Zealand, thinking of my snow covered home...
RE: Open Web Joists and Shear Transfer
DaveAtkins
RE: Open Web Joists and Shear Transfer
Then we use the 2 1/2" tubes between the angle and the supporting wall or beam below the joist seats to transfer lateral forces from the continuuous collector angle to the wall or beam below.
So the continuous angle is the collector and the tubes are used intermittently only to the extent needed....not at every joist space.
RE: Open Web Joists and Shear Transfer
RE: Open Web Joists and Shear Transfer
Here is a link for rollover design
http://www.pdhonline.org/courses/s116/s116.htm
RE: Open Web Joists and Shear Transfer
RE: Open Web Joists and Shear Transfer
Regards,
Lutfi
RE: Open Web Joists and Shear Transfer
RE: Open Web Joists and Shear Transfer
RE: Open Web Joists and Shear Transfer
It's worth obtaining.