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- To: seaint(--nospam--at)seaint.org
- Subject: Dual System
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 15 Oct 1999 19:49:06 GMT
I am designing a one story church structure with an upper mezzanine area. I would like to use a dual system for the lateral load. The building will be wood framed. The mezzanine requires some steel framing to support the floor and roof area. Below is a sketch of the building cross section. Use a mono spaced font like courier to see it. /\ / \ / \ | | | | /| |\ / | | \ / |----------| \ /------| |------\ | | | | | | for longitudinal lateral forces (perpendicular to the section shown) I was thinking of using a dual system of steel moment frames in the center core and plywood shear walls on the outer walls. 97 UBC Section 1629.6.5 states 1.A dual system an essentially complete space frame that provides support for gravity loads..... 2. Resistance to lateral load is provided by shear walls or braced frame and moment resisting frames..... 3. The two systems shall be designed to resist..... 97 UBC Section 1627 definition of space frame is "a three dimensional structural system, without bearing walls, composed of members....." My question has to do with item #1. It requires a space frame to support gravity loads. Does this mean I can not use the exterior stud walls, which will be the shear walls, as bearing walls? What is the reason for this? Thanks for your help. Rich Lewis __________________________________________________ Richard Lewis, P.E. Missionary TECH Team rlewis(--nospam--at)techteam.org The service mission like-minded Christian organizations may turn to for technical assistance and know-how.
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