huangyhg

5 story wood building
we just got a new project, and it happens to be a 4 & 5 story wood apartment building. we've never designed a 5 story building and i've been tasked with researching the topic. particularly, the lateral stability aspects of a 5 story wood structure. can you point me somewhere? thanks.
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been doing a lot of those recently, and many contractors are specifically asking for the ats holddown system in lieu of other holddowns. fyi.
mike mccann
mccann engineering
as stated previously, make sure that you have some way to account for the shrinkage of the wood when it comes to the hold-down anchors.
thanks guys for the help. i'll be sure and post when i'm done with my research.
skicat,
the "2006 ibc structural/seismic design manual, volume 2", which is published by the seaoc has a detailed example of a 3-story, light framed hotel structure. in fact, there are two example designs; one for a wood framed building and one for a cold formed steel structure.
the book cost about $70.
5 stories seems like a hugh amount of vertical load to have to bear on wood studs. i'd be very careful about that too. it seems that the lower floor will be solid studs. openings would have so many jack studs... seems difficult.
to add: when you start getting into 5 story wood buildings you need to be confident the contractor has had experience in commercial wood structures. otherwise you'll likely end up with someone who's done small crap and has squeaked by with poor details.....who will likely be a pain throughout the entire process. complaining about overdesign and "why do i need that blocking", "how come there's so many straps", "is it really a big deal to take a chainsaw to your shearwall?"
need to make sure the species you're using can handle 5 stories. i dont think the typical spf will work in most cases. note plate crushing too especially around areas where you have stacking elevator lobbies, etc where you get larger loads.
to be honest, i have never heard of a five story wood framed building. before the ibc came out, you could not build higher than three stories with wood, not for structural reasons, but due to the risk of fire. this is why most of the hotels you see along the interstate are only three stories tall. i think the ibc allows five story wood structures only if they are fully sprinkled.
but, even if the code allows it, is it a good idea?
daveatkins
daveatkins
can you tell me where the ibc code allows a 5 story wood building. typically its 3 stories max.
skicat
check out this nice link for your answer.

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