×
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

Residential Girder Truss Holdowns

Residential Girder Truss Holdowns

Residential Girder Truss Holdowns

(OP)
In my high wind area I usually see a net uplift on girder trusses (.6D + .6W) for most residential roofs that I look at. For girder truss bearing points I will usually have a triple 2x6 post for the gravity loads or larger depending on the numbers. To counteract the net uplift on the girder truss my go to has typically been a Simpson LGT2 or LGT3 series girder tiedown.

This may be a matter of preference but I'm wondering if others are finding other straps/tiedowns are a better solution in this application. The problem I am having as a newbie is that the Simpson catalog is so large with so many options I sometimes find myself calling out products that "can work" but for whatever reason are not the most practical solution (ie. price, habit, trade knowledge...) for certain applications.

Also where the net uplift on the girder is quite larger I will typically call out a holdown to attach the girder truss post to the stemwall below. However, I'm wondering in some instances if this method may be a bit too conservative and if the uplift force may not spread out into the wall below and be redistributed into some of the nearby anchor bolts.

In general I've had some trouble trying to determine how to assign distributed loads to point holdowns or vice versa.

A confused student is a good student.
Nathaniel P. Wilkerson, PE
www.medeek.com

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