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RE: Rolling Shear on Wood Nailer

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Larry,
I agree with Nels...  Rip the nailer so that it's
flush with the flange edge...  I'm sure the erector,
having set the beams incorrectly, won't want to pay
for it.  Too bad for him.  His mistake (likely)...
David Topete, SE
SF, CA
--- Nels Roselund <njineer(--nospam--at)att.net> wrote:
> Larry,
> 
> It's called cross-grain bending.  I don't believe
> that you'll find any
> design values.  Many So. CA cities do not allow it. 
> Seismic damage that has
> led to partial roof collapse was attributed to
> cross-grain bending.  The
> damage occurred in wall anchor details in which the
> wall-anchor load-path
> was: concrete or masonry wall, to anchor bolt, to
> ledger, to nailed plywood
> sheathing [no direct connection of anchor bolt to
> framing, or a too flexible
> connection of anchor bolt to framing].  The
> condition you are having to
> solve seems much more benign.  Nevertheless, could
> you rip the nailer flush
> with the beam flange before installing the hangers? 
> 
> 
>  
> Nels Roselund, SE
> South San Gabriel, CA
> njineer(--nospam--at)att.net
> 
> -----Original Message-----
> From: lrhauer(--nospam--at)earthlink.net
> [mailto:lrhauer(--nospam--at)earthlink.net] 
> Sent: Monday, March 28, 2005 7:27 AM
> To: SEAOC
> Subject: Rolling Shear on Wood Nailer
> 
> 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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