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Re: Housing Performance Objectives[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: Housing Performance Objectives
- From: ErnieNSE <ErnieNSE(--nospam--at)aol.com>
- Date: Wed, 10 Dec 1997 06:17:09 EST
Regarding Dennis Wish's post on maintaining minimum standards, here's my opinion: Since we cannot just remove the conventional framing section of the code, then let's work on revising or upgrading it to conform to minimum standards. I think what has been happening is that as code changes through the years, we upgrade the seismic provisions of the sections for engineered houses but we don't upgrade the conventional framing section. Let's work backwards in the calculation to determine the amount of shear and uplift a braced wall is subjected to based on the maximum spacing of braced walls allowed and based on minimum seismic loads for engineered houses. Then let's recommend that the plywood shear wall nail spacing and uplift straps or hold-downs be revised to conform to this revised calculations. There would not be a lot of objections to this one since it involves a very small additional cost, we still keep the conventional framing section of the code, and we upgraded it to the minimum standards. What I'm trying to do is to keep everybody happy. Nothing is perfect but hopefully, we can all live with compromises. If we can do this type of upgrading to the other provisions of the conventional framing section, including adding additional provisions for connections to roofs framing that are missing or any other things that anyone may find less than minimum standards, then we can get this code section to be equivalent to the engineered house section. The only problem might be how to get draftsmen to put it in structural plan form correctly without an engineer reviewing it, how to get the plan checker to make sure the plans are per code, and how to get the contractor to build it per plan (assumming the plan was done right). Possible solutions to these potential problems are commentary with sketches to illustrate the proper interpretation of the code provisions(similar to the prescriptive requirements for metal studs for houses); training for plan checkers to make sure the plans conform to code and for building inspectors to make sure the houses are built per plan; requiring structural observation by an engineer to make sure the provisions of the code is followed.... We don't have to wait a long time to get some of these revisions to the code. Let's try and convince ICBO and the different building departments to issue addendums or bulletins now, and then get the code fully revised later Ernie Natividad.
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