laying concrete slab for shed base butting up to garden wall

[matz]

I'm thinking putting up a 20' x 10' concrete sectional building in my garden sitting on 4" concrete which will sit on 4" compacted hardcore.

Couple of questions if anyone can help

1) can I butt the concrete slab up against and over the top of the boundray wall foundations ( I want the building as close to the wall as possible) Boundray wall is approx 5 foot high of single red brick construction.

2) Can I run the concrete slab to within 12" of a sewer manhole cover which is in the garden also? The sewer pipes are about 2' down maybe more and wont run beneath the slab.

many thanks...

 

[noseall]

1) can I butt the concrete slab up against and over the top of the boundray wall foundations ( I want the building as close to the wall as possible) Boundray wall is approx 5 foot high of single red brick construction.

2) Can I run the concrete slab to within 12" of a sewer manhole cover which is in the garden also? The sewer pipes are about 2' down maybe more and wont run beneath the slab.

1) Yes, but there is a slight risk of differential shear crack. Prepare the base well.

2) Yes.