Stiffness of equivalent soil spring

Type of soils

Soft

Medium

Hard

Footing

dim. 30 * 30 ft

Footing dim. 25 * 25 ft

Footing dim. 15 * 15 ft

Vertical (kip/ft)

42,897

130,586

1,089,276

Horizontal (transversal direction) (kip/ft)

32,335

93,119

905,725

Horizontal (longitudinal direction) (kip/ft)

32,335

93,119

905,725

Rocking (about the longitudinal) (kip.ft)

7,689,516

12,130,288

17,914,003

Rocking (about the transversal) (kip.ft)

8,361,189

13,548,574

19,255,865

Torsion (kip.ft)

396,725

835,256

1,697,930