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Basement for existing structure

Basement for existing structure

Basement for existing structure

(OP)
We need to install a water proof basement under an existing buildings wall, probably using structural steel frame:

natural clay becoming firmer with depth at 7 ft from ground level

Objective is to avoid having to shore up the walls, if possible.

Has any one experience of the following method

1.    placing a pillar outside and at each end of a wall
2. inserting girder connecting pillars
3. internal support pillars where necessary
4. do this for all walls to create supporting structural load baring frame

Are there alternatives?

Jon
Netix4@yahoo.com

RE: Basement for existing structure

Jon:
What is the physical size of the existing building? Is it a single/double storey? What was it is made of?

RE: Basement for existing structure

(OP)
This is a tradional brick building with slate roof:
ground approx 1,800 sq ft and two other stories above
 
total including ground is approx 3,000 sq ft.

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