Language selection

Search

Content page

From [Institution name]

Dimensions of "The Footing Tube" and the FTB30 Base Pier

Tube/Footing Diameter (d1)

Dimensions (mm)

d0

d1

d2

d3

d4

d5

h0

h1

152 mm (6 in.)

355

152

152

297

304

297

1 372

152

203 mm (8 in.)

609

203

203

356

558

499

1 591

216

254 mm to 305 mm (10 in. to 12 in.)

609

254

305

477

559

521

1 626

304

546 mm (21 in.) (FTB30)

856

546

762

n/aFootnote (1)

n/a

n/a

229

n/a

Test Results for Allowable Bearing Pressures and Loads

Soil Description

Allowable Bearing PressureFootnote (1) Footnote (2) (kPa)

Allowable Loads

152-mm (6-in.) Footing TubeFootnote (3) 0.078 m2 Base Area

203-mm (8-in.) Footing TubeFootnote (4) 0.239 m2 Base Area

254-mm to 305-mm (10-in. to 12-in.) Footing TubeFootnote (5) 0.239 m2 Base Area

FTB30 0.455 m2 Base Area

Dense or compact sand or gravel

150

11.8 kN/tube

35.9 kN/tube

35.9 kN/tube

68.2 kN/tube

Loose sand or gravel

50

3.9 kN/tube

11.9 kN/tube

11.9 kN/tube

22.7 kN/tube

Dense or compact silt

100

7.8 kN/tube

23.9 kN/tube

23.9 kN/tube

45.5 kN/tube

Stiff clay

150

11.8 kN/tube

35.9 kN/tube

35.9 kN/tube

68.2 kN/tube

Firm clay

75

5.9 kN/tube

17.9 kN/tube

17.9 kN/tube

34.1 kN/tube

Soft clay

40

3.1 kN/tube

9.5 kN/tube

9.5 kN/tube

18.1 kN/tube

Till

200

15.7 kN/tube

47.9 kN/tube

47.9 kN/tube

91.0 kN/tube

Clay shale

300

23.6 kN/tube

71.8 kN/tube

71.8 kN/tube

136.5 kN/tube

Sound bedrock

500

39.4 kN/tube

119.8 kN/tube

119.8 kN/tube

227.5 kN/tube

Test Results for Stability

Tube

Requirement

ResultFootnote (1)

152 mm (6 in.)

Within 10 mm horizontally of original position

Pass

203 mm (8 in.)

Within 10 mm horizontally of original position

Pass

254 mm to 305 mm (10 in. to 12 in.)

Within 10 mm horizontally of original position

Pass

546 mm (21 in.) (FTB30)

Within 10 mm horizontally of original position

Pass