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Tom Bower
Registered Users
New Member
Posts:37
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| 06/06/2000 9:35 PM |
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The SIPWeb has been quiet for the past several days. Time to liven it up.
A friend of mine plans to build a SIP house near the Atlantic Ocean in Florida. He says that houses must be designed to withstand a 130 MPH windload.
If he builds with SIP wall panels and SIP roof panels, what specific additional steps must be taken to meet the Florida windload requirements.
Assuming the sill plate is bolted to the slab and the bottom plate is screwed into the sill plate, can the installer just nail the SIP panel to the bottom plate? Or are additional measures required?
To connect the roof panel to the wall panel,the normal connection method is to nail big spikes through the roof panel into the wall panel top plates. Will a hurricane strap also have to tie the roof panel and wall panel together?
Is there is any requirement to run a Simpson type tiedown strap from the roof panel directly to the slab foundation?
As my speciality is finance, not SIP's, I will look for your expert guidance.
Tom Bower
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Steve Andrews
Registered Users
Basic Member
Posts:334
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| 06/09/2000 8:57 PM |
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Tom, I've asked a couple of other folks to respond to your questions. They haven't chimed in yet, but may soon.
I can't comment about the specific tie-down requirements of the Florida code. I suggest your friend contact regional SIP manufacturers (check our product directory for others besides Structall Building Systems, Allied Foam Products [AFM], and Temp Control).
Prior to today's widespread use of screw fasteners, some manufacturers use to specify Simpson reinforcing angles (e.g., L-70s) for attaching walls and ceiling panels from the interior, as well as straps across the top of ceiling panels. Some of those tie-downs would likely still make sense in extreme wind zones. SIPA is working with Simpson Strong Tie regarding updates in such tie-down specifications. (See SIPnews for a short item on this next week.)
The "big spikes" you refer to: do you mean the screw fasteners? They are much skinnier than the old screw shank barn-pole type nails that we used to bang into place, but their holding power is a lot stronger.
One way to reinforce the panel-to-foundation connection is to run your foundation bolts up through both a mud-sill and the bottom plate.
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Jim Tracy
Registered Users
New Member
Posts:15
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| 06/12/2000 3:34 PM |
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Tom;
Most manufacturers have hard test data that has been evaluated by either a code body or at least a P.E. This test data should be used by design professionals to evaluate a structure and the climactic stresses put on the whole assembly as defined by the local jurisdiction. (In this case, 130 MPH winds in an undefined exposure) Bottom line: Good engineer uses good data to build, or in this case design, a better house using SIPs. I have seen SIP installations in the 150 MPH, exposure C range work like a charm on both residential and commercial projects. These installations were also Seismic zone 4! Talk to a SIPA Manufacturer for their engineering load design charts.
Good Luck!
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