Block Format Keyword Definition of the line segments.


(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
seg_ID1 node_ID1 node_ID2              
seg_ID2 node_ID1 node_ID2              
etc etc etc              
seg_IDn node_ID1 node_ID2              


Field Contents SI Unit Example
line_ID Line group identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

line_title Line group title

(Character, maximum 100 characters)

seg_ID1, seg_ID2, seg_IDn, List of segment identifiers (optional)


node_ID1 Node identifier 1 for segment


node_ID2 Node identifier 2 for segment




  1. Lines are used to define interfaces in 2D analysis and interface TYPE8, TYPE11 and TYPE20 in 3D analysis.
  2. All nodes must belong to a shell, brick, triangular shell, truss, or beam element.