Structural Engineering — Footing Details
Footing Detail Drawings
Mayank's House  ·  G+1 Residential  ·  Isolated Footing System  ·  RCC M20 / Fe500
F1: 1200×1200×450mm
F2: 1400×1400×450mm
Col: 300×300mm
M20 Concrete / Fe500
Depth: 1800mm BGL
Drg. No. MHFD-01
Date: 01.03.2026
Scale: NTS
12
Total Footings
F1+F2
Footing Types
1.8m
Depth BGL
M20
Concrete Grade

Plan Views — Footing Top Face

Sheet 1 of 3
Reinforcement layout as seen from top · Dimensions in mm

F1 — Plan View (1200×1200mm)

AT CORNERS & EDGES · QTY: 8
PCC 1500×1500 COL 1200 mm 1200 mm 300×300 c=50 7T12 7T12 @150 @150
━ Main: 7T12 @150 (Bot)
━ Dist: 7T12 @150 (Top)
■ Column: 300×300
Cover: 50mm
Grade: M20 / Fe500
Qty: 8 nos.

F2 — Plan View (1400×1400mm)

AT CENTRAL SPINE (B-COLS) · QTY: 4
PCC 1700×1700 COL 1400 mm 1400 mm 300×300 9T12 9T12 @150
━ Main: 9T12 @150 (Bot)
━ Dist: 9T12 @150 (Top)
■ Column: 300×300
Cover: 50mm
Grade: M20 / Fe500
Qty: 4 nos. (B-Spine)

Reinforcement Schedule

BOTH FOOTING TYPES
MarkSizeMain BarDist BarCoverQty
F1 1200×1200×450 7T12 @150 7T12 @150 50mm 8
F2 1400×1400×450 9T12 @150 9T12 @150 50mm 4
PCC M10, 100mm thick, Ftg size +150mm each side — 12
ParamF1 ValueF2 Value
Footing size1200×12001400×1400
Thickness450 mm450 mm
PCC size1500×15001700×1700
PCC thick.100 mm100 mm
Steel (main)7T12 @1509T12 @150
Steel (dist.)7T12 @1509T12 @150
ConcreteM20 (fck=20 N/mm²)
Steel gradeFe500 (fy=500 N/mm²)
SBC assumed150 kN/m²
Bar Bending Notes
· Both layers extend to full cover-to-cover length
· Main bars (T12) placed at bottom layer
· Dist bars (T12) placed on top of main bars
· Provide L-shaped starter bars at column location
· Lap length for T12: min 500mm

Section Views — Footing Depth Detail

Sheet 2 of 3
Longitudinal section through footing centre · All dimensions in mm

F1 — Section X–X (1200×1200×450mm)

CORNER / EDGE COLUMNS · T12 @150
NGL PCC M10 TB 300×450 FFL +450 c=50 450mm(plinth) 1250mm 450mm 100mm PCC 1200 mm 1500 mm (PCC) TOTAL = 1800mm BGL COL 300×300 FOOTING F1 BACKFILL BACKFILL 7T12@150 7T12@150 T8@150 X X

F2 — Section Y–Y (1400×1400×450mm)

CENTRAL SPINE B-COLUMNS · T12 @150
NGL PCC M10 TB 300×450 FFL +450 450mm 1250mm 450mm 100mm 1400 mm 1700 mm (PCC) TOTAL = 1800mm BGL COL 300×300 FOOTING F2 (Central) 9T12@150 9T12@150 T8@150 Y Y

Column Section Detail & Depth Analysis

Sheet 3 of 3
Column reinforcement cross-section · Depth schedule · Engineering notes

Column Section Detail (300×300mm) & Layer Sequence

4T16 MAIN + T8@150 STIRRUPS · CLEAR COVER 40mm
Column X-Section at Footing
T16 T16 T16 T16 T8 STIRRUP @150 40mm cover 300 mm 300 mm
● 4T16 main bars (corners)
□ T8 stirrups @150mm c/c
  Clear cover: 40mm
  Min. lap: 48×16 = 768mm ≈ 800mm
  Column: M20 / Fe500
Foundation Layer Sequence
NATURAL SOIL / HARD MURUM SBC ≥ 150 kN/m² PCC M10 — 100mm ISOLATED FOOTING RCC M20, 450mm deep COL 300×300 TIE BEAM NGL +450mm 1250mm (BGL to ftg top) 100mm

Depth Schedule

ALL DIMS IN mm
Plinth HT
+450 mm
Col BGL
1250 mm
Ftg Depth
450 mm
PCC Layer
100 mm
TOTAL BGL
1800 mm
LayerMaterialThickness
PCC BedM10 Concrete100 mm
FootingM20 / Fe500450 mm
Col StubM20 / Fe5001250 mm
Tie BeamM20 / Fe500300×450 mm
BackfillMurum/soil1250 mm
PlinthBrick / RCC+450 mm

Engineering Notes

SITE GUIDELINES
Foundation
· Verify SBC before casting — min. 150 kN/m²
· Increase footing to 1500×1500 if soft soil
· Anti-termite chemical treatment before PCC
· Waterproofing coat on all footing sides

Concrete
· PCC: M10 · Footing + Column: M20
· Curing: minimum 28 days water curing
· Do not cast footing on loose/wet soil

Reinforcement
· Steel: Fe500 (HYSD bars, ISI marked)
· Main bars lap length: min. 500mm
· Column starter bars: 800mm above footing
· Provide U-hooks at footing corners

Sequence of Work
1 · Excavation → 2 · Anti-termite → 3 · PCC
4 · Footing steel → 5 · Column starters
6 · Pour M20 → 7 · Cure → 8 · Backfill
9 · Plinth beam → 10 · GF slab