×
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

How to calculate end rotation for a truss

How to calculate end rotation for a truss

How to calculate end rotation for a truss

(OP)
I am trying to calculate the end rotation of a truss for pot bearings. What units should my deflections and lengths be in?

RE: How to calculate end rotation for a truss

It's a pinned connection...shouldn't rotate.

RE: How to calculate end rotation for a truss

Deflections and lengths, use mm.

RE: How to calculate end rotation for a truss

Ron,

What exactly stops it from rotating?

psuarcher,

Radians are dimensionless so as long as you use consistent units throughout you will be fine.

If in doubt, put your units into the formula and see what it comes out as.

RE: How to calculate end rotation for a truss

csd72...if you get significant deflection in the truss you will get a modicum of rotation; however, such rotation is so small that designing the bearing for such is, in my opinion, a waste of time.  The bottom chord (or intersecting members..depending on geometry) stiffness will control, to some degree, the stress distribution across the bearing surface.

So then you have to decide where the rotation actually occurs....is it over the bearing surface (not likely) or is it just off the bearing surface?

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