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

Stair Tread Bolting Requirements

Stair Tread Bolting Requirements

Stair Tread Bolting Requirements

Hey all, I'm hoping you guys can help me with something.

We have numerous stair cases built with galvanized fisher & ludlow stair treads that have slotted holes in them.

They're bolted to stringers on each end with 3/8" A307 structural bolts, but our installers haven't installed washers on the inside of the tread where the slot is. ASTM specification for structural joints states that on snug tightened joints, a washer shall be installed when a slotted hole occurs in the outer ply. I'm curious if the slot in the stair tread meets that criteria and requires a washer. The slot is perpindicular to any forces applied to the tread, the hole adjacent to the slot isn't slotted so the tread won't budge, and I can't find anything anywhere that says that stair treads are classified as structural connections or not.

Are we going to have to go back and fix all these or are they acceptable? Any insight would be appreciated, I've searched this forum thoroughly and haven't really found much that helps.


RE: Stair Tread Bolting Requirements

Stairs are not classified as structural steel. See AISC Code of Standard Practice section 2.2.

There is ample precedent in the history of science for the overwhelming bulk of the scientific community strongly believing in imaginary entities postulated by a favovered theory. -Michael Behe

RE: Stair Tread Bolting Requirements

Ok, thanks Bagman

RE: Stair Tread Bolting Requirements

astuartl...Agree with Bagman2524 on structural definition. Also, you might want to check the Metal Stair Manual from NAAMM. I believe it is available online for no charge.

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! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close