Return to index: [Subject] [Thread] [Date] [Author]

Re: 3x6 T&G diaphragm capacity

[Subject Prev][Subject Next][Thread Prev][Thread Next]
The T&G joint on lumber decking does not have sufficient length to
accomodate nailing of both edges of the lumber with a line of fasteners.

John Rose
Tacoma, WA

Michael Hemstad wrote:

> What happens if you shoot 8d (or whatever) nails
> through the tongue and groove?  I would think the work
> would go pretty quickly.  Use finishing nails and set
> the gun to countersink them a little bit, so they
> wouldn't show as much.  The shear capacity would be
> easy to calculate, and probably very high.
>
> Mike Hemstad
> TKDA
> St. Paul, Minnesota
>
> >The shear capacity for *thin* sheathing perpendicular
> to beams is the
> "couple" formed by the two nails.  Three inch thick
> sheathing may have
> different numbers if the sheathing boards are nailed
> together.  For more
> information, see Western Wood Products Association's
> "Western Woods Use
> Book".
>
> >Sheathing shear capacity:
> Diaphragm shear capacity =
> nail shear X nail spacing X # sheathing boards per
> foot / beam spacing
>
> Or:
> v = V*s/(w*b)
>
> where
> V = Nail shear capacity (lb.)
> s = Nail spacing (in.)
> w = board (sheathing) width (in.)
> b = beam spacing (ft.)
>
> v = shear in lb/ft
>
> The answer is usually a pretty low number.
> -----
> >Jason W. Kilgore, P.E.
> Project Engineer
> Leigh & O'Kane, L.L.C.
> (816) 444-3144
> jkilgore(--nospam--at)leok.com
>
>  -----Original Message-----
> >From: Mark Baker [mailto:shake4bake(--nospam--at)earthlink.net]
> Sent: Tuesday, March 19, 2002 11:32 AM
> To: seaint(--nospam--at)seaint.org
> Subject: 3x6 T&G diaphragm capacity
>
> >  Anybody know or can refer me to a reference for
> diaphragm capacity on the
> following roof construction:
>
>   6x16 @ 10' o.c.
>   3x6 T&G sheathing (Western Red Cedar) with (2) 50d
> per board to each 6x16.
>
>   Constructed in 1966
>
>   TIA
>
> >  Mark
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! Sports - live college hoops coverage
> http://sports.yahoo.com/
>
> ******* ****** ******* ******** ******* ******* ******* ***
> *   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> *   This email was sent to you via Structural Engineers
> *   Association of Southern California (SEAOSC) server. To
> *   subscribe (no fee) or UnSubscribe, please go to:
> *
> *   http://www.seaint.org/sealist1.asp
> *
> *   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
> *   send to the list is public domain and may be re-posted
> *   without your permission. Make sure you visit our web
> *   site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********


******* ****** ******* ******** ******* ******* ******* ***
*   Read list FAQ at: http://www.seaint.org/list_FAQ.asp
*
*   This email was sent to you via Structural Engineers
*   Association of Southern California (SEAOSC) server. To
*   subscribe (no fee) or UnSubscribe, please go to:
*
*   http://www.seaint.org/sealist1.asp
*
*   Questions to seaint-ad(--nospam--at)seaint.org. Remember, any email you
*   send to the list is public domain and may be re-posted
*   without your permission. Make sure you visit our web
*   site at: http://www.seaint.org
******* ****** ****** ****** ******* ****** ****** ********