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Fields for table: TST_LINK_SAMPLE

Field NameCodesData TypeUnitsTest ProtocolDescription
TST_ID

NUMBER(5)


Unique sample identification number used to link samples to multiple layers in multiple sections.
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.
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).
FIELD_SET

NUMBER(2)


Sequential number indicating the field sampling event. Assigned 1 for first sample event and incremented by 1 for subsequent events.
SAMPLE_NO

VARCHAR2(7)


Unique code number assigned to each material sample indicating the sample type and material type. The first character indicates the sample type. The second character indicates the material type. The numeric suffix is the unique sample number for the sample type and material type.
LAYER_TYPE
LAYER_TYPEVARCHAR2(2)


A character code indicating the type of layer.
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.