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Re: Failure of Connection between Rafter

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This, I believe is another case of the redundancies inherent in timber frame
construction.  The folded paper analogy suggests that the "tear-away" or
"zipper" effect probably only really becomes an issue at high strains or
deformations and therefore your observation probably makes sense.  Also the
effect probably only becomes pronounced at high shear concentrations.  Thus
for low levels of stress and deflection the tradition connection probably
suffices and with that, adequacy in containing any rafter axial loads.  IMO,
however, seismic loads impose peaks of stress and deformation that will
surely take up any latent redundancy or capacity provided by traditional
framing, no?

Thor Tandy  P.Eng  MCSCE
Victoria BC
Canada
vicpeng(--nospam--at)vtcg.com

-----Original Message-----
From: Paul_Reilly(--nospam--at)dot.ca.gov <Paul_Reilly(--nospam--at)dot.ca.gov>
To: seaint(--nospam--at)seaint.org <seaint(--nospam--at)seaint.org>
Date: Monday, May 03, 1999 7:46 AM
Subject: Re: Failure of Connection between Rafter


>
>
>Just tossing it around.  I believe the rafter-plate connection as commonly
>detailed for the transfer of shear to the diaphram provides an inherrent
fixity
................