Simpson Strong-Wall
Simpson Strong-Wall
(OP)
Whats your opinion of using Simpson Strong Walls in lieu of portal frames/shear walls? What other/better options are out there?
I've got a 12'x14' garage door with only 24" of wall on both sides (single story), Wind Speed (ult.) 155 mph, Seismic Cat. D. The stud wall height is approx. 15' with a 6" stem wall above grade, my aspect ratio is about 7.5 which definitely won't work for any sort of standard shearwall and the wall height exceeds the max. height allowed for portal frame details in both the IBC (10' max height for figure 2308.9.3.2) and IRC (12' max wall height with pony wall above header Fig. R602.10.6.2). To make this work I think I will need either a Simpson Strong-Wall or a much more expensive Simpson Strong Frame or equivalent.
I've got a 12'x14' garage door with only 24" of wall on both sides (single story), Wind Speed (ult.) 155 mph, Seismic Cat. D. The stud wall height is approx. 15' with a 6" stem wall above grade, my aspect ratio is about 7.5 which definitely won't work for any sort of standard shearwall and the wall height exceeds the max. height allowed for portal frame details in both the IBC (10' max height for figure 2308.9.3.2) and IRC (12' max wall height with pony wall above header Fig. R602.10.6.2). To make this work I think I will need either a Simpson Strong-Wall or a much more expensive Simpson Strong Frame or equivalent.






RE: Simpson Strong-Wall
Mike McCann, PE, SE (WA)
RE: Simpson Strong-Wall
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Simpson Strong-Wall
RE: Simpson Strong-Wall
EIT
www.HowToEngineer.com
RE: Simpson Strong-Wall
RE: Simpson Strong-Wall
The greatest trick that bond stress ever pulled was convincing the world it didn't exist.
RE: Simpson Strong-Wall
They tend to forget to install the 24" deep 1" anchor bolts, then they ask for a repair.
RE: Simpson Strong-Wall
Ha, yeah, true. Sometimes I enjoy it and sometimes I feel like they Stong-arm me into using their products.
EIT
www.HowToEngineer.com
RE: Simpson Strong-Wall
RE: Simpson Strong-Wall
http://design.medeek.com/images/misc/2014-017_PORTAL_FRAME_ANALYSIS.pdf
I essentially have two garage door portal frames next to each other but out of plane sharing a 8138 lbs shear load. The biggest jump I made in my opinion was dividing the shear forces not equally but based on the aspect ratio of each portal frames shear panels.
The smaller garage door 10x8 has an shear panel aspect ratio of 4. => 64.3% of load
The larger garage door 12x14 has a shear panel aspect ratio of 7.4. => 35.7% of load
The other big assumption made is that the holdown and tension strap at header interface counteract the uplift force equally. My gut tells me that the tension strap will actually take more load than the holdown but I can't prove that, hence I have given it a little extra capacity.
The paper located here was helpful in my thinking the loads through:
Portal Frame WCTE 2012
RE: Simpson Strong-Wall
Just a thought.