Dropped Balcony support
Dropped Balcony support
(OP)
I have a 100mm slab drop for a balcony cant liver concrete slab is ti ok to extend the lower bars of the slab to carry the negative moment of the slab
so the bars will be in positive moment inside the slab then extend to carry the balcony
so the bars will be in positive moment inside the slab then extend to carry the balcony






RE: Dropped Balcony support
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Dropped Balcony support
RE: Dropped Balcony support
The OP wants the top bars for the balcony to be the bottom bars from the interior slab - bottom bars become top bars.
I`m not sure what happens to the compression at the step in the slab.
As KootK mentioned, a sketch would help.
RE: Dropped Balcony support
RE: Dropped Balcony support
Teh slab is 200mm attached a detail to give you an idea of what I am planning to do
RE: Dropped Balcony support
RE: Dropped Balcony support
RE: Dropped Balcony support
RE: Dropped Balcony support
http://www.eng-tips.com/viewthread.cfm?qid=415779
Having a cold joint and all tension taken by the bars looks like a poor design to me. Ok theit is a slope away but over time water will get in and rust those bars. The actual construnction might vary as well.
Continuous slab or bolt the thing into the wall.
There have been enough collapses of balconies to show that you need to take great care and get it rightin design.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Dropped Balcony support
hokie66 yes the detail is by the arch. can not do much really
LittleInch Thanks I agree it is critical detail as no other load path
RE: Dropped Balcony support
You have no choice. You are in charge of the concrete design, and what the architect has drawn does not work. So saying that you "cannot do much really" is irresponsible. Architects can be made to face reality.
RE: Dropped Balcony support
Put down your thoughts in writing to the architect and tell them to think again - far too many deaths and collapses to simply shrug your shoulders.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Dropped Balcony support