×
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 Wood Truss Loading

Residential Wood Truss Loading

Residential Wood Truss Loading

(OP)
When loading a residential wood truss to check for capacity do you apply a distributed load in the Y direction over the top members or do you apply joint loads at the member conections.  Also does one use a pin-pin end connection or a pin-roller end connection.

RE: Residential Wood Truss Loading

You apply joint loads at the member connections.  It is pin-roller end connection to allow for lateral movement at the roller end.

RE: Residential Wood Truss Loading

You must apply a distributed load in the Y direction over the top and bottom members, to calculate the bending and axial stresses in the wood members for the gravity load condition. For the wind condition you apply the wind uplift distributed normal to the top chords. The reactions should be pin-roller.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

RE: Residential Wood Truss Loading

Woodman88 is correct.  You have to analyze the chords for combined axial and bending.  The way we used to do it, before computers, was to analyze the truss with all pin joints and joint loads, then combine the resulting axial forces with wl^2/10.

RE: Residential Wood Truss Loading

hokie66, The formula wl^2/10 is no longer used, since 1991, in the wood formulas. See the current NDS.

Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.

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