Evo Design - structural engineering Calculation No.
001-FOUNDATION
INTERACTIVE ONLINE CALCULATION SHEET Project No.
Â© 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
Footing dimensions Max. pressure on soil under foundation
Pier dimensions
Materials (soil, concrete)

per EN 1993-1-1 and EN 1993-1-8

Maximum working loads             pair of maximum loads. Mx and My are not
N = kN axial force       considered simultaneous. Values are factored,
M = kN*m bending moment       Ultimate Limit State (ULS)
F = kN horizontal force on top of foundation   Maximum working loads for the soil pressure calculation
are determined with the load factors in EN 1990
Footing Dimensions             Annex 1 Table A1.2 (Set C)
L = mm Foudation base length W = 2000 mm Foundation base width
t = 500 mm Foundation base thickness
(parameters that can not be modified in the demo version)
f = mm Depth to top of foundation base

Pier Dimensions
l = mm pier dimension along X
w = mm pier dimension along Z
h = mm pier height

Materials
Fill material characteristics
Unit weight of fill material
rfill = kN/m3 (Unit weight of fill material)

Concrete characteristics
Unit weight of concrete
rconcrete = kN/m3 Unit weight of concrete     Unit weight of fill

Total fill weight above foundation
Gfill = m3 * rfill = kN

Total foundation concrete weight
Gconcrete = m3 * rfill = kN

Loads transfered to the ground (for the calculation of soil max. pressure)
gG,j,sup =             per EN 1990
Nbase = gG,j,sup * (Gfill + Gconcrete) + N = kN     Annex 1 Table A1.2 (Set C)
Mbase = Fx * (t + h) + M = kN*m       The value for g may be modified by the National Annex
e = Mbase/Nbase = mm eccentricity
L/6 = mm
L/2 = mm
e Mbase = kN*m

Nbase = kN

Foundation Base

References:
EN 1997-1-1:2004 - Eurocode 7: Geotechnical design - Part 6 - Surface foundations