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RE: Design References for Complex Light Wood Framed Roof

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Most of this type of framing is done by experience and intuition. Unless you
like the challenge of spending an enormous amount of time figuring out this
complex framing, my suggestion is to get a truss designer involved and let
them worry about the roof framing. After all this is all they do for a
living and they are a lot better at it than a general practice structural

Ben Yousefi, SE
San Jose, CA

	-----Original Message-----
	From:	Tripp Howard [SMTP:tripphoward(--nospam--at)]
	Sent:	Tuesday, March 19, 2002 6:26 AM
	To:	seaint(--nospam--at)
	Subject:	Design References for Complex Light Wood Framed Roof

	I'm in an IBC high wind region here in Savannah GA.  The local
authorities have mandated that all new residential construction with roof
slopes of 7:12 and greater require plans stamped by a registered engineer or
architect in order to get a building permit.  We do very little light framed
residential construction in our office, but for certain big clients we need
to be able to provide that service.

	The biggest problem I'm having is with the roof framing.  It seems
nobody around here wants a nice simple gabled roof-line.  They want hipped
ends every where, big dormers, high pitches (10:12), and of course, they
want lots of open floor and attic space.  The only way I can seem to make
most of this work is to put a bunch of LVL/PSL beams in the ceiling plane
and build up short knee-walls or posts to support the ends of all the
hip/valley beams and really long joists.  It can get real complicated real
quick.  I would use metal-plate-connected wood trusses but that wouldn't
give me the attic space everyone wants.

	Does anyone know of any good references on the design of this type
of roof system?  Also, could anyone point me to some example construction
plans that show how to communicate all the ceiling joists and rafter
arrangements?  Any pointers you have would be greatly appreciated.


	Tripp Howard


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