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Re: Rolling Shear on Wood Nailer

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This is a bad idea.  If I understand your detail correctly, you end up with cross grain bending in the wood.  Don't count on any support beyond the edge of the beam.  If you have light loads (doesn't sound like it), you might pretend that you have strength at a 45 degree angle up from the edge of the beam.  Under no circumstances would I count on support any further from the edge of the beam.

Jake Watson, P.E.
Salt Lake City, UT


---------- Original Message ----------------------------------
From: lrhauer(--nospam--at)earthlink.net
Reply-To: <seaint(--nospam--at)seaint.org>
Date:  Mon, 28 Mar 2005 07:26:47 -0800 (GMT-08:00)

>Does anyone know if there is a value for "rolling shear" in wood, (or I guess you could call it "shear perpindicular to the grain")? I have a job which is under construction and uses long span premanufactured wood roof trusses sitting on a 4x nailer atop a wide flange beam, (perpindicular to the trusses). My detail shows the truss bearing clips sitting on the top of the nailer with the nailer edge flush with the flange of the beam, (typical detail). However, in construction they somehow didn't get the wide flange beam exactly straight, so that they want to "hang" the 4x nailer over the edge of the beam flange about 1" to pick up the truss reaction.
>
>I am reluctant to do this since I can find no value in the NDS for this type of shear and have always been under the impression it is not good to do this.
>
>Anyone know of a value for "rolling shear", or any other advice like "make them do it right"?
>
>Thanks in advance,
>
>Larry Hauer SE
>
>
>
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