trench concrete detail
trench concrete detail
(OP)

is there a possibility not to put any reinforcement on the concrete considering the concrete can withstand the load itself? any advise and comments are very much welcome. thank you.
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RE: trench concrete detail
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: trench concrete detail
RE: trench concrete detail
You need the reinforcement for durability even if you can make it calc out for strength.
RE: trench concrete detail
RE: trench concrete detail
@haynewp @tlhs what is the minimum possible reinforement
RE: trench concrete detail
Dik
RE: trench concrete detail
RE: trench concrete detail
RE: trench concrete detail
any thoughts on this details? what will be the problem disadvantages of this detail?
RE: trench concrete detail
Possibly, some brands of steel fibers can replace reinforcement. But, if you do the trench in two pours then steel fibers would not work. Also, if these need to meet ASTM requirements for utility structures they likely cannot be reinforced only with fibers. Overall I'd say steel fibers may work but they will add some labor on the mix placement side, so might end up being a wash.
That may work. The lack of reinforcement in the bottom of the trench may be an issue, but likely not a problem given the size. Possible corrosion/spalling issue with the rebar extending through the pour but for a trench I doubt it's a show stopper unless you need a long service life out of this trench.
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: trench concrete detail
You can cast them with a varying invert, or you can screed them to give a slope if you really need to. There are plastic and metal options too. CSP slot drains could be an idea as well depending on the exact application.
RE: trench concrete detail
Dik
RE: trench concrete detail
RE: trench concrete detail
Dik
RE: trench concrete detail
RE: trench concrete detail
RE: trench concrete detail
RE: trench concrete detail
RE: trench concrete detail
Look at the following items in this order:
-Local jurisdiction's department of transportation standard drawings
-Standard drawings of nearby local municipalities
-Local precast concrete/CSP vendor catalogs
RE: trench concrete detail
RE: trench concrete detail
Seriously, just listen to TLHS and myself. Don't reinvent the wheel. It's fine if you want to look over the design of the supplier of the trench (I encourage it, even) but realistically most precasters and trench grating suppliers will have this figured out already.
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: trench concrete detail
RE: trench concrete detail
BTW thank you all.