|
shear values?
#28073
02/07/12 06:12 AM
|
Joined: Aug 2006
Posts: 242
timber brained
OP
Member
|
OP
Member
Joined: Aug 2006
Posts: 242 |
Wondering about discrepancies on horizontal shear values. Sobon's house book list EWP #1(beams and stringers) as 65. Then on a another reputable site the listing is 125. This is quite a difference. The 65 seems right but then why would there be so many varying values? What then is the true value for #1 Northern red oak, and for all #1 red oaks(beams and stringers)?
|
|
|
Re: shear values?
[Re: timber brained]
#28074
02/07/12 02:43 PM
|
Joined: Mar 2002
Posts: 1,687
Jim Rogers
Member
|
Member
Joined: Mar 2002
Posts: 1,687 |
The NDS values were reviewed and update a few years ago. This may have been after the book was published with the old values.
Current values are 205, I believe.
Jim Rogers
Whatever you do, have fun doing it!
|
|
|
Re: shear values?
[Re: Jim Rogers]
#28075
02/07/12 04:31 PM
|
Joined: Nov 2003
Posts: 687
Gabel
Member
|
Member
Joined: Nov 2003
Posts: 687 |
I seem to remember that when the numbers were updated as Jim said, it was because they found a redundant safety margin of 2 that they removed which more or less doubled the design values.
Last edited by Gabel; 02/07/12 04:32 PM. Reason: speling
|
|
|
Re: shear values?
[Re: Gabel]
#28077
02/08/12 02:51 AM
|
Joined: Aug 2006
Posts: 242
timber brained
OP
Member
|
OP
Member
Joined: Aug 2006
Posts: 242 |
So that makes more sense. That also helps a bit with some deeper beams, like 3-4" deeper than they are wide, as they tended to pass easily in bending while having a difficult time passing horizontal shear. So you would end up having to widen a beam which would kind of force you widen the posts that accept as well. Jim, that 205 is for red oak right, but the #1 EWP(Beams and stringers) would be 125 right? Thanks guys. Makes design a bit more simple. tb
|
|
|
Re: shear values?
[Re: timber brained]
#28080
02/08/12 03:57 PM
|
Joined: Mar 2002
Posts: 1,687
Jim Rogers
Member
|
Member
Joined: Mar 2002
Posts: 1,687 |
One online site where you can find this values is here: http://www.forestryforum.com/members/donp/Fblist.htmI believe DonP updated this after he verified that these numbers were correct at that time. Jim Rogers PS. I did a save as and saved that web page to computer so that you can access it off line.
Whatever you do, have fun doing it!
|
|
|
|
|
|
|