This data record specifies an additional length of line to be used when calculating the line stiffness. It has no effect on the distance between the start and end points of the line. The stiffness is calculated as AE/(additional length + actual length) and therefore the maximum stiffness is AE/(additional length). This data record must be input before the LNDW data record and each LNDW data record that follows this data record will have the specified additional length.

      2   5  7   11    16    21    26    31        41        51        61
    - --- -- ---- ----- ----- ----- ----- --------- --------- ---------
    X|   |  |DWAL|     |     |     |     |         |         |
    - --- -- ---- ----- ----- ----- ----- --------- --------- ---------
          |   |                               |
          |   |                               |
          |   |                               |
          |   |                               |_ (2) Additional length required.
          |   |
          |   |_(1) Compulsory Data Record Keyword(A4)
          |
          |_Optional User Identifier (A2)