The footings against the existing adjacent rubble foundation wall are set up above the new cellar slab elevation in order to avoid any undermining of the existing support material of the adjacent structure. You can note the stepped down footing when we pass the existing cellar foundation of the adjacent building.

The pipe sleeve is also provided with waterstopping material around its circumference and then poured into the footing. This will allow the outside footing perimeter pipe to traverse the footing and continue around the inside of the footing, until it outfalls in the sump pit.

 

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