Plinth beam continuous and tied into the foundation
Why — act while you have leverage
The plinth beam (the concrete band the walls start from) is what stops the walls above from moving independently of the foundation below. Broken at a doorway or cast without laps into the columns, it is a decorative band of concrete.
What to look at
- Continuity across every opening, including the main door
- Lap lengths into columns measured, not assumed
- Cover maintained on the underside where it sits on soil
How to check it yourself
The beam runs continuously around the building, including across door openings, and its bars lap into the columns by the designed length. Where it is interrupted, ask why and get it in writing.
Where this comes from: IS 456:2000 cl. 26.2.5 (laps) and cl. 26.4 (cover); IS 4326 for the seismic detailing where it applies (indian standard or building code)
More foundation checks
- Photograph before this is covered
- Cover blocks in place — 50 mm to footing reinforcement
- Steel matches the grade and diameter on the drawing
- Concrete cured for at least seven days
- Rubble foundation: through bond stones at every course band
- Rubble foundation: hearting solid, chips under a fifth of the volume
- RCC footing: size and depth as designed, on the correct stratum
- Raft foundation: reinforcement laid in the order the drawing gives and not walked flat
- Pile foundation: pile records kept for every pile, not a sample
- Under-reamed piles: bulb formed at the designed depth
- Column starter bars plumb, with 40 mm cover and correct laps
- Backfill compacted in layers, not tipped in
- Damp proof course laid unbroken at plinth level