×
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

Footing Jacketing

Footing Jacketing

Footing Jacketing

(OP)
Good Evening / Morning .
Due to a additionnal load on an existing isolated footing , i'm trying to redesign it by using the jacketing it by two orthogonal beams.
My question is about new beams reinforcement ( please see attachment ) :

1.Is longitudinal beams reinforcement , by direction , should balance all the new effort from the column , regardless existing reinforcement in the existing footing ?
2. What are disposition for calculating lniks between old and new concrete ?

Thanks a LOT.

RE: Footing Jacketing

I haven't seen a perimeter beam around a footing like that.

At the pier above the footing, I recommend adding a shear head made out of channel steel, and reinforcing similar to a post at a two-way slab (inverted). Design the footings for the factored soil capacity, not the applied load, as a courtesy to future engineers.

RE: Footing Jacketing

I've done something similar myself for additional load on a footing. However, what I did was to widen the footing to handle the new pressure....and have 4 beams (2 per direction) on top of the footing. The new beams ran on top of the old & new parts of the footing. The whole thing looked like an inverted double T beam. The beams on top of the footing tied directly to the pier delivering the axial load. (So the distance between the beams was the width of the pier.)

I tied it all together with re-bar and Hiltis. (The required number of which depended on shear flow, etc.)

Doing this made the footing rigid enough to ensure any additional load was evenly distributed (I hope).




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