Combined Footing with Central Strap Beam Design Canvas

1. Design Input Parameters

Soil Capacity (SBC)

kN/m²

Column Spacing (S)

Exterior Load (P1)

Interior Load (P2)

Ext Column Width

Int Column Width

Strap Beam Width (b)

Concrete Grade

fck(MPa)

Steel Grade

fy(MPa)

Strap Rebar Dia

Slab Rebar Dia

Clear Cover

2. Limit State Analysis & Verification Calculations

Structural Analytical Phase	Governing Mathematical Equation Matrix	Symbol	Computed Output	Unit

3. Executive Engineering Summary & Rebar Detailing

Specification Target	Calculated Design Dimension / Rebar Details	Unit / Layer	Verification Status
Footing Footprint Base Plan Size	5.40 m × 2.20 m	Plan Area	SAFE SOIL PRESSURE
Adopted Strap Beam Dimensions	500 mm × 700 mm	Width × Depth	PUNCHING SECURE
Strap Beam Top Longitudinal Steel	6 Nos. — Φ25 mm	Top Tension	HOGGING VALID
Strap Beam Bottom Longitudinal Steel	4 Nos. — Φ20 mm	Bottom Layer	SAGGING VALID
Strap Beam Transverse Shear Links	Φ10 mm 4-legged @ 120 mm c/c	Stirrups	SHEAR SECURE
Footing Slab Thickness & Base Mesh	300 mm Thick \| Φ12 @ 150 mm c/c	Transverse Face	CANTILEVER OK