Question about 'Drop beam' - Wall connection
Question about 'Drop beam' - Wall connection
(OP)
Hi
(Metric Units)
What is the detailing for the connection of a drop beam (B=60 H=70) on a bearing wall (width=40 cm)
the beam is dropped 35 cm below the solid slab (thickness=35 cm) ?
Is it ok to load a drop beam on a wall with no embedded column in the wall section?
the beam bottom steel is 18$25 (on 3 layers, 6 bars each)
Thanks so much and sorry for my English.
(Metric Units)
What is the detailing for the connection of a drop beam (B=60 H=70) on a bearing wall (width=40 cm)
the beam is dropped 35 cm below the solid slab (thickness=35 cm) ?
Is it ok to load a drop beam on a wall with no embedded column in the wall section?
the beam bottom steel is 18$25 (on 3 layers, 6 bars each)
Thanks so much and sorry for my English.






RE: Question about 'Drop beam' - Wall connection
Mike McCann, PE, SE (WA)
RE: Question about 'Drop beam' - Wall connection
what do you mean by 'I would not leave column steel out'?
Regards
RE: Question about 'Drop beam' - Wall connection
1) has any flexural fixity between beam and wall been assumed?
2) do you know the beam reaction at the wall?
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: Question about 'Drop beam' - Wall connection
Mike McCann, PE, SE (WA)
RE: Question about 'Drop beam' - Wall connection
1) Use the wall with no integral column and no special wall reinforcing beneath the beam.
2) Install an integral column that projects from the wall a bit.
3) Leave the face of the wall flush but install a column rebar cage inside of the wall for extra capacity.
I believe that msquared is proposing #3. It's a great system as you get extra strength without complicating the wall formwork.
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: Question about 'Drop beam' - Wall connection
@msquared48 There is no column steel in the wall, wall reinforcement is just 5Y16/m, basic sketch: https://www.dropbox.com/s/ofya6t2ovva9xjd/beam%20w...
RE: Question about 'Drop beam' - Wall connection
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: Question about 'Drop beam' - Wall connection
its a bit trickier since the existing wall is already there and there is only 1.8 m of it not yet poured.
PDF with longitudinal section : https://www.dropbox.com/s/bfjw7o1z6mn3x8k/beam%20w...
RE: Question about 'Drop beam' - Wall connection
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: Question about 'Drop beam' - Wall connection
was just looking forward to know initial hunch, is it sufficiant to add column reinforcement to the wall section only 1.8m high under the beam?
RE: Question about 'Drop beam' - Wall connection
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: Question about 'Drop beam' - Wall connection
RE: Question about 'Drop beam' - Wall connection
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: Question about 'Drop beam' - Wall connection
But the design would seem to me to be poorly proportioned. That is a lot of steel in a 600 wide beam web. Why not make it wider so you can get the steel all in one layer, or two at most? And the reinforcement in the 400 wall sounds light.
What does your mentor say about the situation?