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Fields for table: TRF_ESAL_AC_THICK

Field NameCodesData TypeUnitsTest ProtocolDescription
STATE_CODE
STATE_PROVINCENUMBER(2)


Numerical code for state or province. U.S. codes are consistent with Federal Information Processing Standards.
MATL_CODE
MATERIALNUMBER(3)


Code corresponding to the material type classification.
RES_MOD_AVG

NUMBER(5)
MPa

The average resilient modulus across cycles.
LAYER_COEFFICIENT

NUMBER(3,2)


Layer coefficient of the material.
DRAINAGE_COEFF_BASE

NUMBER(3,2)


Drainage coefficient of material if base or subbase course.
RECORD_STATUS

VARCHAR2(1)


A code indicating the general quality of the data.
SHRP_ID

VARCHAR2(4)


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

NUMBER(2)


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

NUMBER(2)


Event number used to relate changes in pavement structure with other time dependent data elements. This field is set to 1 when a test section is initially accepted into LTPP and is incremented with each change to the layer structure.
START_DATE

DATE


Beginning date for which these properties apply to the section.
END_DATE

DATE


End date for which these properties apply to this section.
DESCRIPTION
DESCRIPTIONNUMBER(2)


Code indicating general type of layer.
LAYER_TYPE
LAYER_TYPEVARCHAR2(2)


Code identifying the type of layer.
REPR_THICKNESS

NUMBER(4,1)
in

Representative thickness for a layer in the section