4" Concrete Wall
4" Concrete Wall
(OP)
This is an exterior wall, a fence really. The architect wants 4" concrete. It's about 6ft tall, cantilevered. Based on strength this easily works (assuming proper footing, steel etc. etc.) This is obviously very tight - exterior so 1.5" cover both sides eats up 3". I'm thinking I'll use #3 bars, 1 curtain each way, and up the spacing as necessary to give myself all the room possible. Any issue with this (assuming the contractor is competent).






RE: 4" Concrete Wall
Maybe precast or tilt up and grouted into a foundation pocket?
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: 4" Concrete Wall
RE: 4" Concrete 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: 4" Concrete 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: 4" Concrete Wall
RE: 4" Concrete Wall
I'll give it a shot.
RE: 4" Concrete Wall
Specify a batch mix with 3/8" max. aggregate and specify a maximum placement height. They can build birdmouths at one or two wall elevations spaced at some distance and then cut them off after the wall has cured. Also, having a formwork vibrator (clamps on formwork) can make a huge difference and mitigate human vibration error.
This is not very different to partial depth wall and column face repairs that I perform often.
"It is imperative Cunth doesn't get his hands on those codes."
RE: 4" Concrete Wall
RE: 4" Concrete Wall
RE: 4" Concrete Wall
The cracking moment, Mcr, is > Mu so any steel will suffice for strength. Looks like it's just about a competent contractor.
RE: 4" Concrete Wall
RE: 4" Concrete Wall
"It is imperative Cunth doesn't get his hands on those codes."
RE: 4" Concrete Wall
Professional and Structural Engineer (ME, NH)
American Concrete Industries
www.americanconcrete.com
RE: 4" Concrete Wall
"It is imperative Cunth doesn't get his hands on those codes."
RE: 4" Concrete Wall
Auto collision excepted of course. How tall? Any serious chance of people trying to climb it or jump it? (Fence for a concert or stage or stadium would be more likely to see climber for example than a junkyard wall or industrial privacy screen.
RE: 4" Concrete Wall
Yes? That is why you design a proper footing with a conservative bearing value if there is no geotechnical information. I am sure Boo knows what he is doing in that regard, or else he would have asked a more broad question.
"It is imperative Cunth doesn't get his hands on those codes."
RE: 4" Concrete Wall
rac - I will have proper footing etc., no worries on that part.
RE: 4" Concrete Wall
Oh well, cast-in-place then but you'll want to use plenty of skinny WWR with tight spacing on the wires to make sure you have as much cover as possible. As KootK suggested above a tilt-up wall may be the best way to go.
Professional and Structural Engineer (ME, NH)
American Concrete Industries
www.americanconcrete.com
RE: 4" Concrete Wall
RE: 4" Concrete Wall
Professional and Structural Engineer (ME, NH)
American Concrete Industries
www.americanconcrete.com