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I know that this home has a main waste line..


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This was a first for me. The main line was on the ground and covered with the moisture barrier. When I first went in the crawl it took me a few moments to realize that I could not see the PVC waste lines that are normally suspended from the joist.

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Iron. Can't use plastic underground in Chicago. Local 130.

You know, I never thought about uplift with plastic...I never see it. Is uplift restraint required with plastic?

As far as I know, uplift isn't a problem with cast iron or galvanized steel. At least I've never seen it cause a problem.

Plastic DWV is supposed to be restrained. Sometimes it arrives on the jobsite with a bit of a curve in it, like a keel on a boat. Even if it's straight when it's installed, it can lever up afterward, as other pipes are fitted to it. And sometimes, it bounces up & down when a big slug of water runs through it.

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No soil, crushed limestone fill of about two feet. We always see them suspended due to the unevenness of the land. I just do not see how they can get a proper slope when it is on the ground.

Why would anyone fill a 6' deep walker with 2' of stone and make it into a crawl?

It would have been cheaper to place a slab.

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No soil, crushed limestone fill of about two feet. We always see them suspended due to the unevenness of the land. I just do not see how they can get a proper slope when it is on the ground.

Why would anyone fill a 6' deep walker with 2' of stone and make it into a crawl?

It would have been cheaper to place a slab.

This was a hands and knees crawls, not a walker.... Stone is cheap in our area, we have more rock than dirt! I must admit that the stone does not make for a comfortable crawl but it sure does help to make for dry crawl most of the time.

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No soil, crushed limestone fill of about two feet. We always see them suspended due to the unevenness of the land. I just do not see how they can get a proper slope when it is on the ground.

Why would anyone fill a 6' deep walker with 2' of stone and make it into a crawl?

It would have been cheaper to place a slab.

This was a hands and knees crawls, not a walker.... Stone is cheap in our area, we have more rock than dirt! I must admit that the stone does not make for a comfortable crawl but it sure does help to make for dry crawl most of the time.

Yeah,

That's what some of the high-end builders do around here in wet areas. They'll sink a deep foundation, figure out where the high water line will be and then they fill to at least a foot above that line with stone; course stuff topped with a layer of pea gravel. Very comfortable to crawl around on. Nice flat crawl. Dry as a bone...until you dig down deep into that stone and find the water.

Works great as long as the barrier is correct. When it's not correct it's like having a big humidifier plugged in under the house.

ONE TEAM - ONE FIGHT!!!

Mike

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