Are- Site Planning

Front 1

- Typically inorganic in nature.
- Has a grain size less than 0.0002 in diameter.
- classified as stiff, med or soft.
- Can make adequate bearing material under certain conditions.
- Because of the cohesive nature of clay, steep slopes can be achieved for short time periods.

Back 1

Clay

Front 2

- Consists of inorganic particles.
- Particles range between 0.0002 and 0.0003 in diameter.
- Not plastic in nature

Back 2

Silt

Front 3

- Typically inorganic in nature.
- Has a grain size less than 0.0002 in diameter.
- classified as stiff, med or soft.
- Can make adequate bearing material under certain conditions.
- Because of the cohesive nature of clay, steep slopes can be achieved for short time periods.

Back 3

Clay

Front 4

- Consists of inorganic particles.
- Particles range between 0.0002 and 0.0003 in diameter.
- Not plastic in nature

Back 4

Silt

Front 5

-Classifications can range from fine to course
-Particles can range in size from 0.003 to 0.079 in in diameter.
- The courser the sand the higher the allowable bearing pressure.
- Fine sands are subject to becoming quick when subjected to unbalanced hydrostatic pressure (too much water)

Back 5

Sand

Front 6

-Classifications can range from fine to course
- Rock fragments range from 0.75 in to 3 in in diameter.
- Can make reliable foundation bearing material .
- Depending on the underlying material, very high bearing pressures are allowed by code.

Back 6

Gravel

Front 7

-Ranging in size from 3 in to 10 in in diameter.
- These rock fragments can make reliable foundation bearing materials

Back 7

Cobbles.

Front 8

- Typically classified as rock fragments over 10 in.
-Can be used as parts to fill voids between masses. The spaces between boulders are then commonly filled with smaller silts and gravels.
- They do not make good foundation bases.

Back 8

Boulders

Front 9

- Unbroken hardrock that is not over any other material
- It can be capable of withstanding extremely high bearing pressure, and is desirable for foundations for structures with high loads.

Back 9

Bedrock

Front 10

- Soils comprised of the the in place decomposition of bedrock materials.
- In general these soils are more weathered near the surface, and transition to a more rock like material with depth.

Back 10

Residuum

Front 11

- Loose and heavily saturated soils, unsuited for the support of structures or pavements.
- Transported by water

Back 11

Alluvial soils

Front 12

- Soils irregular in composition and loose. They require improvement and remediation before being used to support buildings and pavements.
- transported by gravity

Back 12

Colluvial Soils