×
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

DBA = deformed bar anchor ??

DBA = deformed bar anchor ??

DBA = deformed bar anchor ??

(OP)
Am inspecting at a project where several large plate embeds are shown on the structural drawings as having  "1' #6 DBA w/180 ACI STD. HK".

OK, I read that as a # 6, grade 60, weldable piece of rebar 1' long + a 180 hook.  A #6 bar ACI standard hook should have a diameter of bend of 4.5" and a 4d tail.

The contractor is a couple of floors away from actually placing these embeds but I saw a stack of embeds unloaded from a truck yesterday.

What they have is a 1' smooth dowel + a 180 hook.  The hook has a 3 1/2" diameter of bend and a 1 to 2d tail.  The smooth dowels have been "notched" to a depth of 1/8" at 1" spacing on 4 sides.  inverted deformations?

Is there any way that they got that right?   

RE: DBA = deformed bar anchor ??

I read it the way you do.  I would ask who manufactured the DBA you have on site and ask for a spec sheet with load capacity, etc.

RE: DBA = deformed bar anchor ??

DBAs are low carbon, weldable, deformed steel bars that meet the requirements of ASTM A496.

RE: DBA = deformed bar anchor ??

And, lo and behold, they are "deformed", not smooth.

 

RE: DBA = deformed bar anchor ??

Agree with the others. You read the plans correctly. I would notify the contractor and the Engineer of Record.  

RE: DBA = deformed bar anchor ??

(OP)
I sent a picture to the EOR.  Have not heard back yet

Thanks for the hrlp.

RE: DBA = deformed bar anchor ??

I use deformed bar anchors sometimes because I can't get pullout strength to work using headed studs.  Nelson stud makes the D2L (a deformed bar anchor) up to 36" long.  They can be used as tension lap splices with vertical reinforcement in the walls.  Its like tieing you embed plate to the vertical steel reinforcment.  While one foot length doesn't sound like a lap splice situation the engineer of record needs to know because the acceptance of the other product may depend on how the DBA's were intended to be used.  

Most likely the contractor has messed up here.

RE: DBA = deformed bar anchor ??

(OP)
Thanks for the info southard2.  I looked up the D2L DBA, but from the Nelson info it looks like the deformations are raised, similar to rebar deformations.  On the DBAs I see here at the project site the deformations are cut in, like with a grinder.  The cuts are about 1/8" deep spaced at 1" on 4 sides of the round bar.  Is that a D2L?

RE: DBA = deformed bar anchor ??

From the photo, these looked like deformed bar anchors to me.  

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