PLINTH BEAM LAYOUT
+ REINFORCEMENT

MAYANK'S HOUSE · FARIDABAD, HARYANA · G+1 RESIDENTIAL
PLINTH BEAM: 230×300mm · STRAP BEAM: 230×300mm · M20/Fe415 · IS:456-2000
LEVEL: +450mm (ENTRANCE) · +750mm (PLINTH) · ALL DIMS IN mm
DWG: MH-PB-01
DATE: 01.03.2026
SCALE: NTS
REV: 00
230×300
PB SIZE (mm)
+450mm
BEAM LEVEL
230×300
STRAP BEAM
3–16φ
BOT BARS
8φ@150
STIRRUPS
LAYOUT PLAN
▸ PLINTH BEAM LAYOUT PLAN — AT +450mm LEVEL
PB-1 (2675mm) PB-1 PB-1 (2750mm) PB-2 PB-2 PB-3 PB-3 PB-4 PB-4 PB-5 PB-5 PB-6 PB-6 PB-A PB-B PB-D PB-E SB-C SB-CD SB-CD X-X' X 2675 1125 1050 2750 2000 2450 1950 1800 2800 A B C D E N LEVEL: +450mm
▸ LEGEND
Primary Plinth Beam (PB)
230×300mm · M20/Fe415 · +450mm
Strap Beam (SB)
230×300mm · Staircase zone
Corner Column (C1)
4 nos · 8-bar arrangement
Edge / Internal Column
C2/C3 · 6 or 4 bars
Stair Zone Column (C3)
Grid C · strap beam tied

BEAM REFERENCE SCHEDULE

BEAM IDDIRECTIONSPANFROM→TO
PB-AY11000mmA1→A6
PB-BY11000mmB1→B6
PB-DY11000mmD1→D6
PB-EY11000mmE1→E6
PB-1X7600mmA1→E1
PB-2X7600mmA2→E2
PB-3X7600mmA3→E3
PB-4X7600mmA4→E4
PB-5X7600mmA5→E5
PB-6X7600mmA6→E6
SB-CY2000mmC1→C2
SB-CD1X1050mmC1→D1
SB-CD2X1050mmC2→D2
TOTAL BEAMS13 beams

TOTAL BEAM LENGTH

TYPENOSAVG SPANTOTAL
PB (Y-dir, full)411000mm44.0 m
PB (X-dir, full)67600mm45.6 m
SB (stair zone)3~1700mm5.1 m
GRAND TOTAL94.7 m
TYPE A — MAX SPAN
▸ PB Cross Section — Mid-Span (Hogging)
BRICK WALL 12φ 12φ 16φ 16φ 16φ 40mm 230 mm 300 mm 8φ@150 BOT: 3-16φ · TOP: 2-12φ Mid-span (sagging zone)
TYPE B — NEAR COLUMN
▸ PB Cross Section — Near Column (Hogging)
16φ 16φ 16φ 12φ 12φ 230 mm 300 mm 8φ@100 TOP: 3-16φ · BOT: 2-12φ Near column (hogging zone)
TYPE C — STRAP BEAM
▸ SB Cross Section — Staircase Zone
12φ 12φ 16φ 16φ 230 mm 300 mm 8φ@150 STRAP TENSION BOT: 2-16φ · TOP: 2-12φ Strap beam — eccentric load

CROSS SECTION COMPARISON

SECTION TYPELOCATIONTOP BARSBOT BARSSTIRRUPSNOTE
Type A — Mid-spanMiddle of span2-12φ3-16φ8φ@150Sagging moment dominant
Type B — Near columnWithin d from face3-16φ2-12φ8φ@100Hogging moment · dense stir
Type C — Strap beamStair zone C–D2-12φ2-16φ8φ@150Strap tension from eccentric ftg
Cover to stirrup face40mm clear (IS:456)
LONG — X DIR
▸ PB along Grid-1 (X direction) — A to E
NGL +450mm (entrance lvl) A B C D E 2675mm 1125 1050 2750mm @100 @150 @150 @100 3-16φ BOTTOM (CONT.) 2+1-16φ TOP HOGGING +450 +750 X X'
LONG — Y DIR
▸ PB along Grid-A (Y direction) — 1 to 6
NGL +450mm 1 2 3 4 5 6 2000 2450 1950 1800 2800 3-16φ CONT BOTTOM Y Y'
CORNER JOINT
▸ Corner Column–Beam Joint (A1 / A6 / E1 / E6)
JOINT ZONE Ld = 750mm CORNER — 1 BEAM FRAME IN L-hooks anchored in column
TEE JOINT
▸ Tee Joint — Edge Column (A2…A5)
BARS CONT. THROUGH TEE — 2 BEAMS FRAME IN Bottom bars continuous thru col
CRUCIFORM JOINT
▸ Cruciform Joint — Internal (B2…D5)
JOINT CRUCIFORM — 4 BEAMS All bars straight thru joint
94.7m
TOTAL BEAM LENGTH
M20
CONCRETE GRADE
Fe415
STEEL GRADE
40mm
CLEAR COVER
≈780kg
TOTAL STEEL

PLINTH BEAM — COMPLETE REINFORCEMENT SCHEDULE

BEAM IDSPAN (mm)BOT BARSTOP BARS (mid) TOP BARS (supp)STIRRUPSCONC (m³)STEEL (kg)
PB-A (Y-full)11000 3-16φ2-12φ3-16φ 8φ@100/1500.75972 kg
PB-B (Y-full)11000 3-16φ2-12φ3-16φ 8φ@100/1500.75972 kg
PB-D (Y-full)11000 3-16φ2-12φ3-16φ 8φ@100/1500.75972 kg
PB-E (Y-full)11000 3-16φ2-12φ3-16φ 8φ@100/1500.75972 kg
PB-1 (X-full)7600 3-16φ2-12φ3-16φ 8φ@100/1500.52556 kg
PB-2 (X-full)7600 3-16φ2-12φ3-16φ 8φ@100/1500.52556 kg
PB-3 (X-full)7600 3-16φ2-12φ3-16φ 8φ@100/1500.52556 kg
PB-4 (X-full)7600 3-16φ2-12φ3-16φ 8φ@100/1500.52556 kg
PB-5 (X-full)7600 3-16φ2-12φ3-16φ 8φ@100/1500.52556 kg
PB-6 (X-full)7600 3-16φ2-12φ3-16φ 8φ@100/1500.52556 kg
SB-C (Y-short)2000 2-16φ2-12φ2-16φ 8φ@1500.13818 kg
SB-CD11050 2-16φ2-12φ2-16φ 8φ@1500.07310 kg
SB-CD21050 2-16φ2-12φ2-16φ 8φ@1500.07310 kg
TOTAL PLINTH BEAM STEEL 6.47 m³≈ 762 kg

BAR DIAMETER SUMMARY

Φ (mm)USAGEEST. LENGTHWEIGHT
16Bottom bars + support top~940 m~1479 kg
12Mid-span top bars (2 nos)~190 m~169 kg
8Stirrups all beams~620 m~245 kg
TOTAL~1750 m≈ 762 kg

CONCRETE + FORMWORK

ITEMQTYUNIT
Concrete M20 (PB)6.47m³
Formwork (sides)113m²
Anti-termite treatment84m²
PCC lean conc below PB2.3m³
Cement @ 8 bags/m³~52 bags

GENERAL NOTES

  • All PB: 230×300mm · M20 concrete · Fe415 TMT
  • Clear cover to stirrup face: 40mm (IS:456 Cl.26.4)
  • PB level: +450mm from NGL (entrance level)
  • Plinth level (+750mm) = top of masonry filling above PB
  • Strap beams tie staircase footings to prevent differential settlement
  • Bars at corners: L-hooks anchored minimum 750mm into column
  • Continuity bars at bottom run full length A→E and 1→6
  • All stirrups: 2-legged closed 8φ with 135° hooks

STIRRUP SPACING ZONES

  • Within distance 'd' from column face: @100mm
  • Middle zone (remaining span): @150mm
  • Strap beams (short span): @150mm throughout
  • Dense @100 zone applies within 300mm (= 1d) of each column
  • Minimum stirrups: 2-legged 8φ at max 300mm c/c (IS:456)
  • All beam-column joints: dense stirrups inside joint zone
  • Anchor length for beam bars into columns: ≥ 45d (750mm for 16φ)
  • IS code refs: IS:456-2000 Cl. 26.5.1 / 26.5.1.6 / SP:34
MAYANK'S HOUSE — PLINTH BEAM LAYOUT + REINFORCEMENT · DWG: MH-PB-01 13 BEAMS · 94.7m TOTAL · 230×300mm · M20/Fe415 · ≈762 kg STEEL DATE: 01.03.2026 · IS:456-2000 · ALL DIMS IN mm · REV: 00