×
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

Large Cantilever

Large Cantilever

Large Cantilever

(OP)
Hi All,

I'm analyzing a five storey hotel that has 16 foot cantilever balconies. Floor to floor height is 10 feet. The good thing is there are reinforced concrete party walls at 15'0 centers between each room which also extent out to almost the end of the balcony. The party walls extend 30 feet inside (full bearing down to the ground) although a couple of them have doors linking t40 rooms together (15 foot from the balcony). I'm running some preliminary calcs to advise the architect if this system is possible.

I'm considering spanning the slab 15 foot to the party walls and using the walls as deep cantilever beams.

If I consider that the cantilever depth is 4 x 10' = 40 feet, then a 16 foot cantilever really doesn't seem that bad both for strength and serviceability. Obviously, this deep beam will be cast in 10 foot sections as the building progresses so I will have to check the the shear flow at each construction joint but even 10 foot beam depth seems fine for long term deflections. I also need to consider temporary loading during the construction stage.

Any thoughts/comments?

Thanks

RE: Large Cantilever

Sounds good to me. 16 foot cantilevers are just too much for "normal" construction. The walls should work fine. Hopefully, you won't have issues with the balcony extending around corners.

RE: Large Cantilever

If the walls are there and connected to the slabs, they are going to carry all of the load no matter what you assume anyway, relative to the stiffness of a 15' cantilever slab.

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