Evo
Design  structural design

Calculation
No.


001FOUNDATION

INTERACTIVE ONLINE CALCULATION SHEET

Project No.









onlinestructuraldesign.com

SAMPLE CALCULATION

Project Title:

Foundation calculation  interactive design spreadsheet


Calc. By

Date

Rev.










MN

16.04.2014

0

Subject/Feature:

Foundation design; Foundation maximum soil pressure calculation


Checked By

Date



Imperial Units spreadsheet


CN

16.04.2014














InputÂ

Output






Working loads

Eccentricity






Footing dimensions

Max. pressure on soil under foundation






Pier dimensions







Materials (soil, concrete)
















Maximum Factored Loads








N =


kip

axial force




Pair of maximum loads. Mx and My are not

M =


kipft

bending moment




considered simultaneous.

F =


kip

horizontal force on top of foundation (shear)











Footing Dimensions








L =


ft

Foundation base length






W =


ft

Foundation base width






t =

1.5

ft

Foundation base thickness







(parameters that can not be modified in the demo version)






f =


ft

Depth to top of foundation base






Pier Dimensions











l =


ft

pier dimension along X






w =


ft

pier dimension along Z






h =


ft

pier height


















Materials











g_{fill} =


pcf (unit weight of fill material)








g_{concrete} =


pcf (unit weight of concrete)




















General Calculations











A_{f} =

L * W

=


ft^{2}

Foundation Area






A_{p} =

l * w

=


ft^{2}

Pier Area






W_{tc} =

(A_{f}*t + A_{p}*h)*g_{concrete} =


kips

Concrete Weight






W_{ts} =

(A_{f}  A_{p})*g_{concrete}*f =


kips

Fill Material Weight


















Loads transfered to the ground (for the calculation of soil max. pressure)






N_{base} =

W_{tc}
+ W_{ts} + N

Â =


kips





M_{base} =

F * (t + h) + M =


kipft








e =

M_{base}
/ N_{base}

Â =


ftÂ Â
eccentricity







L/6 =


ft









L/2 =


ft










e


















kipft






















kip



























Foundation Base



















































































































































References:












