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I am seeking some guidance on a poured in place trench drain.

The drain length is 100'. Width and depth are to be 8". Wall thickness is approximately 6". We plan on pouring the walls and pouring the trench bottom later. It'll be easier to manage the slope. etc.

With this long of a run I am curious as to expansion joint spacing. I invision using foam slabs the zip strip stuff and filling the joint with an NP 1 type material...

Any help or advice is greatly appreciated.

Thanks,

Tom
 

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1st if your trench is 8" deep & 100 ft. long it is not deep enough.

If you use an 1/8" of fall per ft. that's 12-1/2" of fall unless your outlet pipe is in the middle.

2nd it is always easier to pour the slab 1st then the walls.

That small of a trench I would pour it in sections upside down.

flip it then set in the hole.

You may want to contact a Pre-Cast concrete co. to precast the trench for you.
 

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The Hubbell or ACO systems make it a breeze, and as Rusty says, there are others.....

Usually the expansion joint should happen at the junction of joints in those systems......if you're just doing it out of concrete, perhaps every 12-20' or so......
 
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