11/597, plot 25, Arunachalam St, Shenoy Nagar, Aminjikarai, Chennai, Tamil Nadu 600030
Building Contractors
M40 grade with 0.45 w/c ratio
Linked to columns via dowels
Bitumen or polyurethane 2mm thick
Chlorpyrifos 1% in soil and masonry
1:3:6 mix under raft
Weak soil, high water table, or heavy column loads—raft distributes load over entire area.
Tie beams at ground level connecting columns, preventing differential settlement in raft.
Two-coat liquid membrane on PCC, upstand 300mm, and plinth protection with brick or DPC.
Chemical barrier in soil, foundation, and backfill stops termites entering building for 10 years.
600mm for 3-storey, up to 2m for 30-storey—designed by structural engineer per soil report.
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