×
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

Metal Deck Fasteners

Metal Deck Fasteners

Metal Deck Fasteners

(OP)
Does anyone know if there is a structural issue with button punching metal deck at the side laps?  I had heard that it is not preferred (vs screws or welding) and decreases the integrity of the deck. Any comments appreciated.  Thanks.

RE: Metal Deck Fasteners

If I recall correctly, the button punching method had the lowest of the diaphragm shear values for sidelap connections. They did not seem substantial as a welded or screwed nested connection. They have been dropped from the recent diaphragm tables. I assume that deck manufacturers no longer make the upstanding seam for button punching.

RE: Metal Deck Fasteners

The newest deck information that I have is from Vulcraft.  They do not provide any diaphragm values for button punched sidelaps.  What they do provide is diaphragm values for 0 sidelap fasteners that are shaded (at over 5'6" joist spacing).  The footnote for the shaded area is as follows: "The shaded values do not comply with the minimum spacing requirements for sidelap connections and shall not be used except with properly spaced button punched sidelaps with 1.5BI deck."

RE: Metal Deck Fasteners

I don't use button punched laps for bare deck diaphragms (non-composite deck), though it may be allowed at lower diaphragm shear capacities.  In composite decks, I use button punched laps and use the concrete above deck for diaphragm capacity which is typically higher than bare deck with heavier lap attachment.

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