×
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

Cantilever slab / Ground Beam

Cantilever slab / Ground Beam

Cantilever slab / Ground Beam

(OP)
I was looking at designing a ground beam with a small cantilevered slab (900mm). The beam would be designed for all loads and torsion from the cantilevered slab off the side of the beam.

I am planning to use light reinforcement in the top of the beam - 10mm bars at 200mm ctrs. each way. (this is also designed OK).

My question is what is the minimum anchorage for the reinforcement from the slab (UK code). At present I have assumed 12X bar diameter past the centre line of the ground beam as you would normally specify for a slab or beam. Would this be adequate?

RE: Cantilever slab / Ground Beam

(OP)
Anyone any thoughts?

RE: Cantilever slab / Ground Beam

I don't know the UK Code, but here is the US, you must develop the bar in the slab on BOTH sides of the face of the beam.  You may need hooks at both ends of each slab bar.

DaveAtkins

RE: Cantilever slab / Ground Beam

(OP)
In this case there is no back span. a small cantilever slab projects from one side of the beam only at the top of the beam. As the is no slab on the other side of the beam the beam is designed for torsion to resist the bending. In this case would a 40Dia standard tension lap suffice?

RE: Cantilever slab / Ground Beam

You have to check UK code for embedment length. For personal preference, I will bring the slab bars all the way to the back side of the beam with standard hook at bar end to provide better protection.

RE: Cantilever slab / Ground Beam

I stand by my original post.  You must develop the bars within the width of the beam, and within the span of the cantilever.

DaveAtkins

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