| Bearing Material | In Place Consistency | Bearing Pressure q ksf |
| Massive crystalline igneous and metamorphic rock: granite,
diorite, basalt, gneiss,
thoroughly cemented conglomerate
(sound condition allows minor
cracks)
| Hard sound rock
| 160
|
| Foliated metamorphic rock: slate, schist (sound condition rock
allows minor cracks)
| Medium hard sound
| 70
|
| Sedimentary rock; hard cemented shales, siltstone, sandstone,
limestone without cavities
| Medium hard sound rock
| 40
|
| Weathered or broken bed rock of any kind except highly
argillaceousrock (shale); Rock
Quality Designation less than 25
| Soft rock
| 20
|
| Compaction shale or other highly argillaceous rock in sound
condition
| Soft rock
| 20
|
| Well-graded mixture of fine and coarse-grained soil: glacial
till, hardpan, boulder clay
(GW-GC, GC, SC)
| Very compact
| 20
|
| Gravel, gravel-sand mixtures, boulder gravel mixtures (SW,SP, SW, SP)
| Very compact, Medium to compact, Loose
| 14, 10, 6
|
| Coarse to medium sand, sand with little gravel (SW, SP)
| Very compact ,Medium to compact,Loose
| 8 , 6 , 3
|
| Fine to medium sand, silty or clayey medium to coarse sand (SW, SM, SC)
| Very compact ,Medium to compact , Loose
| 6, 5 , 3
|
| Homogeneous inorganic clay, sandy or silty clay (CL, CH)
| Very stiff to hard , Medium to stiff ,Soft
| 8, 4, 1
|
| Inorganic silt, sandy or clayey silt, varved silt-clay-fine sand
| Very stiff to hard ,Medium to stiff ,Soft
| 6,3, 1
|
