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Fields for table: SPS2_LAYER

Field NameCodesData TypeUnitsTest ProtocolDescription
SHRP_ID

VARCHAR2(4)


Test section identification number assigned by LTPP program. Must be combined with STATE_CODE to be unique.
RECORD_STATUS

VARCHAR2(1)


A code indicating the general quality of the data.
STATE_CODE
STATE_PROVINCENUMBER(2)


Numerical code for state or province. U.S. codes are consistent with Federal Information Processing Standards.
LAYER_NO

NUMBER(2)


Unique sequential number assigned to pavement layers, starting with layer 1 as the deepest layer (subgrade).
DESCRIPTION
DESCRIPTIONNUMBER(2)


Code indicating general type of layer.
MATERIAL_TYPE
MAT_TYPENUMBER(2)


Code indicating the type of material in each layer.
MEAN_THICKNESS

NUMBER(4,1)
in

Average thickness of each material layer.
MIN_THICKNESS

NUMBER(4,1)
in

Minimum thickness of each material layer.
MAX_THICKNESS

NUMBER(4,1)
in

Maximum thickness of each material layer.
STD_DEV_THICKNESS

NUMBER(4,1)


Standard deviation of the thickness measurements.