×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Need E - value for 2x8 SYP M23
2

Need E - value for 2x8 SYP M23

Need E - value for 2x8 SYP M23

(OP)
Please, I need this urgently for a meeting with a prefab wood truss mfr.

I need to calculate a girder truss deflection by hand today to verify the truss software output.

RE: Need E - value for 2x8 SYP M23

(OP)
If not able to find M23, please inform me E for 2x SYP #1 (according to IBC 2006) - not the new values in IBC 2012

RE: Need E - value for 2x8 SYP M23

Per 2001 NDS. SYP #1: 2"-4" wide E = 1,700,000 psi :: Fb = 1500psi :: Ft=825psi
-FYI
Per 2001 NDS. SYP SS: 2"-4" wide E = 1,800,000 psi
Per 2001 NDS. SYP #2: 2"-4" wide E = 1,600,000 psi

And you obviously know that these values were dramatically decreased recently (by some 30%!!)

RE: Need E - value for 2x8 SYP M23

(OP)
Eric

Thanks a million. I heard they changed but I didn't know exactly what because I don't have the latest NDS.

This will give more ammo in my conflict with the truss designer, regards my other post.

RE: Need E - value for 2x8 SYP M23

Now the 30% is not a true number, only some values changed and they changed by different amounts (fb, Fc, Ft, etc...). I am sure they will have a hard time arguing against you!

RE: Need E - value for 2x8 SYP M23

(OP)
Well, the girder truss deflection they came up with is too close for comfort (for me), but I just re-calced it again and it looks like the deflection is barely within Code.

I have lot of other very serious doubts, however...I just needed to make a list of reasons why I am rejecting their repair, and I had serious doubts as to the accuracy of their truss software.

RE: Need E - value for 2x8 SYP M23

The truss software is in question? That is a major issue. I would mention to you that most the proprietary truss packages assume a slight spring connection at the plates which makes their models nearly impossible to replicate by hand or in RISA/Other.

RE: Need E - value for 2x8 SYP M23

(OP)
Eric, then this truss software may not have included that spring connection. One more critique to add to my list. Thanks.

RE: Need E - value for 2x8 SYP M23

(OP)
RWW, thanks.

It shows the values for M-23.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources