Need a book? Engineering books recommendations...

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

RE: Solid blocking between 2x outlookers

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Is this a vaulted ceiling? Then usually the venting is done at the eave, not
the gable end. If it's a flat ceiling, the venting is usually done below the
top plate in the form of a large louver attic vent thingy in some nice
decorative shape.

That being said, most of the time when venting is required in the blocking
for a vaulted ceiling you will see (3) 2" dia. Holes in the blocks... at a
vaulted ceiling, every single block has this, at a flat ceiling, every 3rd
or 4th typically... also, some like to omit the 3rd or 4th block to allow
for venting and screening, but prefer to other way...

Maybe you could explain why the venting takes place along the sloping gable
end... is it for appearance sake?

-gm

-----Original Message-----
From: Michael L. Hemstad [mailto:hemstad.ml(--nospam--at)tkda.com] 
Sent: Friday, January 28, 2005 8:43 AM
To: seaint(--nospam--at)seaint.org
Subject: Solid blocking between 2x outlookers

Jim Wilson wrote:
> 
> WFCM Table 2.2C has a detail of framing requirements
> for gable endwall outlookers.  One note points to
> the
> solid blocking and refers to it as "Required
> blocking."  It does not seem clear if it is saying
> that blocking IS required, or that blocking is to be
> provided as required, as if when designed by an
> engineer.
> 
> And is blocking always just equal in proportion to
> the
> member it is bracing?  i.e. 2x10 blocking for 2x10
> framing, or can smaller pieces be used?
> 
> Thanks,
> Jim Wilson, PE
> Stroudsburg, PA


OK, we all agree that solid blocking is a good thing.  Except my
architect, who points out that he needs some venting and wants me to
omit most of the blocking or drill big (like 6 inch) holes in it.

What is the response to this?  It seems legitimate.  I've seen more
roofs with failed shingles due to heat build-up than I've seen
structural failures due to inadequate blocking.

Thanks,

Mike Hemstad
TKDA
St. Paul, Minnesota

******* ****** ******* ******** ******* ******* ******* ***
*   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 
******* ****** ****** ****** ******* ****** ****** ********