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From [Institution name]
| Soil Type |
Maximum Allowable Bearing Pressure psf (kPa) |
Model BF20 Allowable Loads lbs (kN) |
Model BF24 Allowable Loads lbs (kN) |
Model BF28 Allowable Loads lbs (kN) |
Model BF36 Allowable Loads lbs (kN) |
|---|---|---|---|---|---|
| Soft clay |
835.42 (40.0) |
1 822.59 (8.1) |
2 624.54 (11.7) |
3 572.29 (15.9) |
5 905.21 (26.3) |
| Loose sand or gravel |
1 044.27 (50.0} |
2 278.24 (10.1) |
3 280.67 (14.6) |
4 465.36 (19.9) |
7 381.51 (32.8) |
| Firm clay |
1 566.41 (75.0) |
3 417.37 (15.2) |
4 921.01 (21.9) |
6 698.04 (29.8} |
11 072.26 (49.3) |
| Dense or compact silt |
2 088.54 (100.0) |
4 556.49 (20.3) |
6 561.34 (29.2) |
8 930.71 (39.7) |
14 763.02 (65.7) |
| Dense or compact sand or |
3 132.81 (150.0) |
6 834.73 (30.4) |
9 842.01 (43.8) |
13 396.07 (59.6) |
22 144.53 (98.5) |
| Stiff clay |
3 132.81 (150.0) |
6 834.73 (30.4) |
9 842.01 (43.8) |
13 396.07 (59.6) |
22 144.53 (98.5) |
| Till |
4 177.08 (200.0) |
9 112.97 (40.5) |
13 122.68 (58.4) |
17 861.43 (79.5) |
29 526.04 (131.3) |
| Clay shale |
6 265.62 (300.0) |
13 669.46 (60.8) |
19 684.02 (87.6) |
26 792.14 (119.2) |
4 4289.06 (197.0) |
| Sound rock |
10 442.70 (500.0) |
22 782.44 (101.3) |
32 806.71 (145.9) |
44 653.57 (198.6) |
73 815.09 (328.3) |
| Test |
Requirement |
Result |
|---|---|---|
| Buoyancy |
The top of each construction tube must remain within 10 mm (both horizontally and vertically) of its original position. |
The top of the construction tube remained stationary during the test with no measurable movement. |
| Compression of unit walls after backfilling |
The sloping sides of the footing base must not be deformed by more than 10 mm after backfilling. |
The units completely filled with concrete and maintained their original shape. There was no appreciable change in dimensions. |
| Air pockets and honeycombing |
There must be no air pockets or honeycombing in any of the products tested. |
Well-consolidated concrete with no voids or honeycombing. |