Structural Engineering · Drg No. MHSC-08 · Building Sections
STRUCTURAL SECTIONS
Mayank's House · G+1 Residential · Section A–A (Longitudinal) · Section B–B (Transverse) · Section C–C (Stair) · Section D–D (Foundation)
Section A–A
Section B–B
Section C–C
Section D–D
G+1 · 3.0m FL–FL · M20/Fe500
DRG. NO. MHSC-08
DATE: 01.03.2026
SCALE: NTS
REV: 00
Section A–A · Longitudinal
Section B–B · Transverse
Section C–C · Stair
Section D–D · Foundation
Summary Schedule

Section A–A — Longitudinal

Grid B · Spans 1-2-3-4
Cut along Grid B (centre) · showing all 4 bays · GF + FF floor levels · roof · foundations · columns · beams · slabs
3500
Bay 1 mm
3500
Bay 2 mm
4000
Bay 3 mm
11000
Total span
3000
FL–FL mm
+450
Plinth mm
125
Slab mm
300
Col. sq.
450
Beam d

Section A–A · Cut Along Grid Line B · Full Height GF to Roof

Longitudinal · 3 spans · Col. 300×300 · Beam 230×450 GF / 230×375 FF · Slab 125mm · Scale NTS
NGL ±0.00 PL +450 GF FFL +3450 ROOF +6450 A ↓ A ↓ 3500mm 3500mm 4000mm ★ 11000mm TOTAL 3000mm FF HT 2850mm GF clear +450 plinth ① ② ③ ④ A-1 A-2 A-3 A-4 GB 230×450 GB 230×450 GB 230×450 FB 230×375 FB 230×375 FB 230×375 PB 300×450 PB 300×450 PB 300×450 COL 300×300 GF SLAB 125mm (T10@150) ROOF SLAB 125mm FOOTINGS F1/F2 @ -1800 BGL
Column 300×300mm
GF Beam 230×450
FF Beam 230×375
Slab 125mm
Plinth Beam 300×450
Footing
Bottom steel
FF/top steel

Section B–B — Transverse

Grid 2 · Spans A–B–C
Cut along Grid Line 2 (intermediate column row) · 2 bays · 3800+3800mm · full structural height
3800
Bay A–B mm
3800
Bay B–C mm
7600
Total width
300
Col. sq. mm
450
GF Beam d
375
FF Beam d
125
Slab mm
3000
FL–FL mm
1800
Fndtn BGL

Section B–B · Grid 2 · Full Height

Transverse through centre · 3800+3800mm · GF + FF · Col. 300×300 · Beam 230×300/375 · Scale NTS
NGL ±0.00 GF FFL +3450 ROOF +6450 B ↓ B ↓ 3800mm 3800mm 7600mm TOTAL WIDTH 3000mm 2850mm A B C Transverse GB 230×450 Transverse GB 230×450 Transverse FB 230×375 Transverse FB 230×375 Transverse PB 300×450 Transverse PB 300×450
Column 300×300
Transverse GF Beam
Transverse FF Beam
Slab 125mm

B–B Key Dimensions

Transverse cut
ItemValue
Bay A–B span3800mm
Bay B–C span3800mm
Total width7600mm
Column size300×300mm
GF beam230×450mm
FF beam230×375mm
PB beam300×450mm
GF clear ht.2625mm
FF clear ht.2625mm
Slab both125mm thick
Plinth ht.+450mm NGL
Footing BGL1800mm
GF beam reo.2T16+2T12+T8
FF beam reo.2T12+2T10+T8

Transverse Beam Types

Grid 2 · same at grids 1,3,4
All transverse beams use same section as longitudinal:
· PB: 300×450mm at plinth (+450mm)
· GB: 230×450mm at GF (+3450mm)
· FB: 230×375mm at FF (+6450mm)
· Spans 3800mm vs 3500/4000mm longitudinal
· Same reo: 2T16 bot, 2T12 top, T8@150 stir.
· All beams cast monolithic with slab above

Section C–C — Staircase

Grid A · Stair Bay
Section through staircase bay · GF to FF · showing waist slab 150mm · 12 risers × 175 · 11 treads × 250 · landing slabs
175
Riser mm
250
Tread mm
12
No. Risers
150
Waist mm
3000
Rise total
2750
Horiz mm
T10
Main bar
150
Bar spacing
35°
Slope angle

Section C–C · Staircase Longitudinal · GF ±0.00 to FF +3.00m

Waist slab 150mm · T10@150 main · GF+FF landings · support beams · Scale NTS
NGL ±0.00 GF ±0.00 FFL FF +3000 FFL GF SLAB/ SUPPORT FF BEAM/ LANDING GF LANDING 150mm FF LANDING 150mm C ↓ C ↓ 2750mm (11 × 250) 175mm 250 2100mm rise (12×175) t=150 T10@150 MAIN BARS T10@150 top T10@150 top Stair flight · Slope 34.9° · Waist slab 150mm
Waist slab + steps M20
T10@150 main bars
T10@150 top at supports
Landing / support

Stair Geometry

IS 456 Cl. 33
ParameterValue
TypeWaist slab
No. risers12 × 175mm
No. treads11 × 250mm
Floor–floor3000mm
Waist slab150mm
Clear width1200mm
Eff. span3000mm
Slope34.9°
Incl. length3341mm
Main steelT10@150mm
Dist. steelT8@200mm
Top barsT10@150mm
Cover20mm
d eff.125mm
ConcreteM20

Section D–D — Foundation

Grid 1 · Typical Column Base
Section through foundation showing footing · pedestal · plinth column · ground conditions · soil profile · founding depth
1200
F1 ftg mm
1400
F2 ftg mm
450
Ftg depth
1800
Excav. BGL
150
PCC bed mm
300
Col. sq. mm
7T12
F1 reo.
9T12
F2 reo.
150
Bar spacing

Section D–D · Foundation Detail — F1 Footing (1200×1200×450mm)

Isolated footing · 7T12@150 each way · M20 · Fe500 · PCC 1:4:8 bed 150mm · SBC ≥150 kN/m²
NGL ±0.00 EXCAVATION 1400×1400mm (F1) FL −1800mm BGL PCC 1:4:8 · 150mm F1 FOOTING 1200×1200×450mm 50c PL +450mm D ↓ D ↓ F1 = 1200mm 450mm 1800mm BGL +450 COL 300mm COLUMN 300×300 4T16+2T12 / T8@100/150 Dowels lap ≥ 600 Stiff soil / hard murram · SBC ≥ 150 kN/m²
Column 300×300
F1 Footing 1200mm
PCC 1:4:8 bed
Column + footing bars
Column stirrups T8
Soil / fill

Foundation Schedule — F1 & F2 Footings

Both types · IS 456 · SBC ≥150 kN/m²
ItemF1 FootingF2 FootingUnit
Plan size1200×12001400×1400mm
Thickness450450mm
Founding depth BGL18001800mm
PCC bed (1:4:8)150150mm
Excavation size1400×14001600×1600mm
Reo. each way7T12@1509T12@150—
Cover (bottom)5050mm
Ast provided792 mm²/m792 mm²/m—
Bearing pressure≤108 kN/m²≤108 kN/m²SBC=150 ✓
Nos. required8 nos.4 nos.Corner vs edge
Concrete gradeM20M20—
Steel gradeFe500Fe500—
Column starter barLap 600mm (4T16+2T12 matched)—
Foundation Notes:
· Founding level: −1800mm BGL in stiff murram/hard soil
· SBC assumed: ≥150 kN/m² (verify by soil test / bore log)
· PCC bed 1:4:8, 150mm thick, 100mm wider than footing all round
· Bottom cover: 50mm to footing steel
· Backfill: compact in 150mm layers to 95% proctor density
· Anti-termite treatment before backfilling
· Tie beams (PB 300×450) connect all footings at plinth level

Summary Schedule — All Structural Members

Sheet 5 of 5
Complete member schedule · section properties · reinforcement · levels · Drawing references

Complete Member Schedule

All structural elements · Mayank's House G+1
MemberSize (mm)LevelMain SteelLinks/StirrupsConcreteDrg Ref
FOUNDATION
F1 Footing1200×1200×450−1800 BGL7T12@150 e/w—M20MHFD-01
F2 Footing1400×1400×450−1800 BGL9T12@150 e/w—M20MHFD-01
PLINTH BEAMS (+450mm NGL)
PB (Long. ×3)300×450+450mm2T16 bot + 2T12 topT8@100/150M20MHPB-03
PB (Trans. ×4)300×450+450mm2T16 bot + 2T12 topT8@100/150M20MHPB-03
COLUMNS — GF (Clear ht ~2625mm)
C-GF (all 12)300×300+450 to +34504T16 + 2T12T8@100(conf)/@150M20MHCD-02
COLUMNS — FF (Clear ht ~2625mm)
C-FF (all 12)300×300+3450 to +64504T12 + 2T10T8@100(conf)/@150M20MHCD-02
GF BEAMS (+3450mm)
GB Long. ×3230×450+3450mm2T16 bot + 2T12 topT8@100/150M20MHBR-06
GB Trans. ×4230×450+3450mm2T16 bot + 2T12 topT8@100/150M20MHBR-06
GF Slab125mm thk+3450mmT10@150 mainT8@200 dist.M20MHSR-05
FF BEAMS (+6450mm)
FB Long. ×3230×375+6450mm2T12 bot + 2T10 topT8@100/150M20MHBR-06
FB Trans. ×4230×375+6450mm2T12 bot + 2T10 topT8@100/150M20MHBR-06
Roof Slab125mm thk+6450mmT10@150 mainT8@200 dist.M20MHSR-05
STAIRCASE
Stair waist150mm thkGF→FFT10@150 mainT8@200 dist.M20MHSS-07
Landings (×2)150mm thk±0.00 / +3.00T10@150 e/w—M20MHSS-07

Building Vertical Profile

All floor levels
SOIL/FOUNDATION LEVEL FOOTING −1800 NGL 0.000 +0.450 PB 300×450 +3.450 GF FFL GB 230×450 +6.450 FF FFL FB 230×375 ROOF SLAB 125 3000mm FF 3000mm GF 450

Drawing Register

Mayank's House · Complete set
Drg No.TitleStatus
MHSG-01Structural Grid PlanIssued
MHFD-01Foundation Layout + Footing DetailsIssued
MHCD-02Column Reinforcement DetailsIssued
MHPB-03Plinth Beam Layout + DetailsIssued
MHBL-04Beam Layout All FloorsIssued
MHSR-05Slab Reinforcement GF + FFIssued
MHBR-06Beam Reinforcement DetailsIssued
MHSS-07Staircase ReinforcementIssued
MHSC-08Structural Sections A–DCurrent
MHLD-09Lintels + ChajjasPending
MHDT-10Miscellaneous DetailsPending