COLUMN REINFORCEMENT DETAILS

MAYANK'S HOUSE · FARIDABAD, HARYANA · G+1 RESIDENTIAL
COLUMN SIZE: 230×230mm · M20 CONCRETE · Fe415 TMT STEEL · IS:456-2000
DWG: MH-COL-01
DATE: 01.03.2026
SCALE: NTS
ALL DIMS IN mm
REV: 00
230×230
SIZE (mm)
8–16φ
MAIN BARS
8φ@150
STIRRUPS
4 NOS
QUANTITY
SECTION — GF
▸ C1 — Cross Section (Ground Floor)
16 16 16 16 12 12 12 12 230 mm 230 mm 40mm COVER 4-16φ 4-12φ 8φ@150 GF: 4-16φ + 4-12φ = 8 BARS p = 2.28% · Asc = 1206 mm²
SECTION — FF
▸ C1 — Cross Section (First Floor)
16 16 16 16 230 mm 230 mm 40mm COVER 8φ@175 FF: 4-16φ + 4-12φ = 8 BARS p = 2.28% · 8φ STIR @175
ELEVATION
▸ C1 — Column Elevation (GF + FF)
FOOTING F1 NGL ±0.000 +450 (entrance) +750 (plinth) PB 230×300 GF SLAB/BEAM LAP ZONE FF SLAB/BEAM 3000mm (GF) 3000mm (FF) @150 @175 C1 — CORNER COLUMN ELEVATION GF ht: 3000mm · FF ht: 3000mm

C1 — CORNER COLUMN REINFORCEMENT SCHEDULE

FLOORBAR MARKΦ (mm)TYPENOS/COLLENGTHSHAPEWT/BARTOTAL WT (4 COLS)
GF V116Corner main bars 43800mmL-hook24.0 kg384 kg
V212Mid-face bars 43800mmL-hook10.2 kg163 kg
S18Outer stirrups 20820mmRect+hook3.3 kg264 kg
FF V316Corner main bars 43500mmL-hook22.1 kg354 kg
V412Mid-face bars 43500mmStraight+U9.4 kg151 kg
S28Outer stirrups (@175) 17820mmRect+hook2.8 kg190 kg
TOTAL STEEL — C1 CORNER COLUMNS (4 nos · both floors) ≈ 1506 kg
230×230
SIZE (mm)
6–16φ
MAIN BARS
8φ@150
STIRRUPS
12 NOS
QUANTITY
SECTION — GF
▸ C2 — Cross Section (Ground Floor)
16 16 16 16 12 12 230 mm 230 mm 4-16φ 2-12φ 8φ@150 GF: 4-16φ + 2-12φ = 6 BARS p = 1.83% · Asc = 1208 mm²
ELEVATION
▸ C2 — Elevation + Section Comparison GF vs FF
GF SECTION 4-16φ + 2-12φ 8φ @ 150mm FF SECTION 4-16φ + 2-12φ 8φ @ 175mm SAME BARS WIDER STIR C2 — PROPERTIES Column size 230 × 230 mm GF height 3000 mm FF height 3000 mm Main bars 4-16φ + 2-12φ (both fls) GF Stirrups 8φ @ 150mm c/c FF Stirrups 8φ @ 175mm c/c Steel ratio (p) 1.83% (IS:456 min 0.8%✓) Quantity 12 nos (edge grid)
230×230
SIZE (mm)
4–12φ
MAIN BARS
8φ@175
STIRRUPS
6 NOS
QUANTITY
SECTION
▸ C3 — Cross Section (Both Floors)
12 12 12 12 230 mm 230 mm 4-12φ 8φ@175 40mm COVER C3: 4-12φ CORNER BARS p = 0.85% · Asc = 452 mm²
PROPERTIES
▸ C3 — Properties + Location Notes
230 × 230 mm GRID LOCATIONS (C3) Nodes: B1, C1, D1, B2, C2, D2 Note: C grid (rows 3-6): omitted Load: Stair + OTS zone — lighter p min: 0.8% (IS:456) · 0.85% ✓ Cover: 40mm clear to stirrup Conc: M20 · Fe415 · IS:456
TYPE ST1
▸ ST1 — Outer Square Stirrup (8φ)
150 mm (inner) 150 mm 75mm HOOK 8φ ST1 — OUTER STIRRUP Total length per stirrup: ≈ 840mm Used in: ALL columns C1, C2, C3
TYPE ST2
▸ ST2 — Cross Tie / Diamond Tie (8φ)
135° hook alt-hook ST2 — CROSS TIES Used for C1 column (8 bars) Hooks alternate each layer
SPACING ZONES
▸ Stirrup Spacing Zones (per IS:456)
@100 DENSE ZONE @150 GF @100 TOP DENSE BEAM PLINTH NGL 500mm 2000mm 500mm
LAP DETAIL
▸ LAP SPLICE DETAIL (AT GF–FF JUNCTION)
GF BEAM / SLAB LEVEL LAP ZONE ≥ 600mm (45d for 16φ) 600mm @100 IN LAP U-BAR STARTER FF COLUMN BARS GF COLUMN BARS LAP LENGTH CALCULATION 16φ bar: Ld = 45d = 45×16 = 720mm → use 750mm 12φ bar: Ld = 45d = 45×12 = 540mm → use 600mm Staggered laps: alternate bars offset by 1.3×Ld
FULL ELEVATION
▸ TYPICAL COLUMN ELEVATION — ALL LEVELS
FOOTING NGL ±0.00 PLINTH BEAM +450 GF SLAB LAP 750mm FF SLAB GF 3000mm FF 3000mm @150 @175 230mm
8
BARS IN C1
6
BARS IN C2
4
BARS IN C3
≈ 3.2t
TOTAL COL STEEL

COMPLETE COLUMN REINFORCEMENT SCHEDULE — MAYANK'S HOUSE

COL TYPEFLOORMAIN BARSSTIRRUPS HEIGHTQTYMAIN STEEL/COLSTIR STEEL/COL TOTAL STEEL
C1
CORNER		 GF 4-16φ + 4-12φ 8φ@150 3000mm 4 34.2 kg 3.3 kg 150 kg
FF 4-16φ + 4-12φ 8φ@175 3000mm 4 31.5 kg 2.8 kg 137 kg
C2
EDGE		 GF 4-16φ + 2-12φ 8φ@150 3000mm 12 27.4 kg 3.3 kg 369 kg
FF 4-16φ + 2-12φ 8φ@175 3000mm 12 25.2 kg 2.8 kg 336 kg
C3
INTERNAL		 GF 4-12φ 8φ@175 3000mm 6 16.2 kg 2.8 kg 114 kg
FF 4-12φ 8φ@175 3000mm 6 14.8 kg 2.8 kg 105 kg
TOTAL COLUMN STEEL (GF + FF · all 22 columns both floors) ≈ 1211 kg
+ Plinth beam steel (from foundation drawing) ≈ 320 kg
GRAND TOTAL — COLUMNS + PB STEEL ≈ 1531 kg

BAR DIAMETER SUMMARY

Φ (mm)USAGETOTAL LENGTHWEIGHT
16Corner main bars (C1, C2)~620 m~975 kg
12Mid-face bars (C1, C2, C3)~280 m~248 kg
8All stirrups~520 m~205 kg
TOTAL~1420 m≈ 1428 kg

CONCRETE QUANTITIES — COLUMNS

ELEMENTNOSSIZEVOLUME
C1 Corner (GF+FF)4230×230×60001.27 m³
C2 Edge (GF+FF)12230×230×60003.80 m³
C3 Internal (GF+FF)6230×230×60001.90 m³
TOTAL COLUMN CONCRETE (M20)≈ 6.97 m³

DESIGN NOTES

  • All columns: 230×230mm uniform section (G+1 RCC frame)
  • Concrete: M20 grade (fck = 20 N/mm²)
  • Steel: Fe415 TMT (fy = 415 N/mm²)
  • Clear cover to stirrups: 40mm (IS:456 Cl. 26.4)
  • Min steel ratio: 0.8% · Max: 4% (IS:456 Cl. 26.5.3)
  • C1 p = 2.28% · C2 p = 1.83% · C3 p = 0.85% — all OK
  • Lap splice ≥ 45d: 16φ→750mm, 12φ→600mm
  • Staggered laps: alternate bars offset ≥ 1.3Ld

CONSTRUCTION NOTES

  • Stirrup spacing @100mm within 500mm of beam-col junction
  • Dense stirrups @100 in lap zones per IS:456 Cl. 26.5.3.2
  • Column bars to extend 300mm into footing (bent 90°)
  • Starter bars from footing: provide full lap length
  • Kicker (75mm) required before column formwork
  • All bars to be cleaned free of rust, dust, oil before casting
  • Column concrete to be vibrated, not poured from height >1.5m
  • Curing: minimum 7 days wet curing after de-shuttering
MAYANK'S HOUSE — COLUMN REINFORCEMENT DETAILS · DWG: MH-COL-01 C1: 8 BARS · C2: 6 BARS · C3: 4 BARS · ALL 230×230mm · M20/Fe415 DATE: 01.03.2026 · IS:456-2000 · ALL DIMS IN mm · REV: 00