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RE: heavy timber frame
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: heavy timber frame
- From: "Michel Blangy" <mblangy(--nospam--at)satco-inc.com>
- Date: Thu, 15 Sep 2005 14:55:41 -0700
diaphragm cantilever out from the main structure?
I have been asked to review a
heavy timber frame which will be located inside of a retail store and will
serve as a canopy over a snack bar. The drawings I received showed 8x8
posts, 8x12 beams and 4x10 purlins? all of Cedar. I see nothing
providing lateral stability for the structure. Even though it is inside
another building, I want to make sure it doesn?t fall over when the first
tired customer leans against a post, so I added 6x6 knee braces, lag screwed
into the beams and columns. The knee braces extend 2?-0? from the inside
of the beam / column joint each way. The client had a fit? they don?t
want any additional bracing.
The beams and columns are
typically connected with ¼? steel kerf plates. Has anyone built this
kind of structure without additional bracing? Basically, the ¼? kerf
plates create a moment joint? The timber framer has said he wanted to
change the kerf plates to mortise and tenon joints? will that create some
I?m not too concerned about
seismic? it?s in the Midwest, but I
may have to produce calcs to provide to the city reviewer. I want to
make sure I can ?prove? the structure is laterally stable.