Description

Name Of Sheet :- Raft / MAT Foundation Design Excel Sheet

Data: –

Calculation of depth of raft:-

• For critical column:
• Column C2,
• ultimate load, Pu=
• size of column =
• Assume effective depth of footing, d=
• Assuming two way shear,
• total perimeter(b0)=
• Shear stress due to load, Ʈv=
• Permissible shear stress, Ʈc=
• For critical edge column:
• Column D3,
• ultimate load, Pu=
• size of column =
• Assume effective depth of footing, d=
• Assuming two way shear,
• total perimeter(b0)=
• Shear stress due to load, Ʈv=
• Permissible shear stress, Ʈc=

Design of common Raft :-

• Loads on column at base
• Moment of inertia about CM:
• Safe Bearing Capacity=
• σx,y =P/A±Mx/Ix*Y±My/Iy*X