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RE: Single-wall house

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In the past, a significant percentage of small(less than 1500sf)
single-family residences built in Hawaii were of single-wall construction.
The primary motivation was that they constituted cheap low-cost housing.
Now it is allowed only for repairs and renovations of existing single-wall
homes.  The Honolulu Building code amendments have a definition of this
type of construction.  There were often(but not always) constructed with
framed floors elevated on posts bearing on small(18"square) unreinforced
precast footings set on grade, locally termed "tofu" footings.  Sometimes
the posts were set on flat stones.  Roof sheathing was sometimes corrugated
steel form decking, especially when utilized as a water catchment system.
They would have no uplift load path connectors whatsoever.  Earthquake
damage is commonly a sliding foundation failure or lateral sidesway failure
of the foundation posts.  Wind damage is the above plus whole scale uplift
of the roof framing(which is only toe-nailed to the verticall board ledger)
followed by collapse of the walls.  Performance of this type of
construction in hurricane exposures is poor.  Foundation elements are very
susceptible to ground termites.

Gary Chock

At 01:07 PM 12/29/99 -0900, you wrote:
>
>
>----------
>From: 	NRoselund(--nospam--at)aol.com[SMTP:NRoselund(--nospam--at)aol.com]
>Sent: 	Wednesday, December 29, 1999 10:03 AM
>To: 	seaint(--nospam--at)seaint.org
>Subject: 	Single-wall house
>
>This sounds very similar to a type of construction that was allowed by
amendment to the UBC in Hawaii and may still be allowed. The reason it was
allowed was because the locals had traditional built houses this way. You
may contact someone there and get information.
>
>James Allen, P.E.

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