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Re: upside down base plate[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: pinyonengineering(--nospam--at)direcway.com, seaint(--nospam--at)seaint.org
- Subject: Re: upside down base plate
- From: Rhkratzse(--nospam--at)aol.com
- Date: Thu, 3 Nov 2005 12:03:31 EST
How about providing a tension ring around the perimeter, forming a dome, and eliminating the center post entirely?
In a message dated 11/3/05 8:35:42 AM, pinyonengineering(--nospam--at)direcway.com writes:
I live on the list in digest mode
I'm working on a Single family house that is an Octogon. the design has a 3:12 roof slope with a center pole for support. I'm working on the top plate on the center pole. A 2ft diameter circle allows for all the wood beams (5.25x 18 parallams) to come together and have 5 inches of bearing. the center pole sizes to 6" dia std pipe. so the top plate cantilevers out 8" around and each beam reaction is 3.7kip on to the plate.
I tried designing the top plate as a steel base plate. (AISC design guide # 1as a reference) came up with 5/8" thick -- I also used an unstiffened beam seat calc and came up with 1" thick. seems close but any suggestions on another verfication procedure for the plate thickness? I think with a thick enough plate gussets won't be needed and would cost less.
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