×
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

Ceadr Beam Substitute

Ceadr Beam Substitute

Ceadr Beam Substitute

(OP)
I have to replace a 4" X 8" cedar beam with a 12' span supporting a flat roof asphalt roll covered roof of 2" X 8" joists 16" on center spanning 12' also.
Can I use two 2" X 8" and one 1" X 8" glued together with polyurethane caulk as a substitute?
    Thanks, Mike.

RE: Ceadr Beam Substitute

The pair of 2x8s and 1x8 would have similar properties (moment of inertia and section modulus) to a 4x8 and should make a suitable substitute (assuming the 4x8 is adequate for the load).  Suggest gluing the the 3 members together with plenty of construction adhesive; the 1x8 in the middle. Also use lots of 3 1/2 inch deck screws(half driven from each side)to hold the "sandwitch" together. Could consider 16d common nails instead of screws but they may tend to split the lumber.

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