Block Format Keyword Describes the external surfaces which belong to given submodels.


Enter selected items numbers (any number may be input, 10 per format).
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
item_ID1 item_ID2 item_ID3 item_ID4 item_ID5 item_ID6 item_ID7 item_ID8 item_ID9 item_ID10


Field Contents SI Unit Example
surf_ID Surface identifier

(Integer, maximum 10 digits)

unit_ID Unit Identifier

(Integer, maximum 10 digits)

surf_title Surface title

(Character, maximum 100 characters)

item_ID1, item_ID2,... item_IDn List of submodel identifiers




  1. The format is the same as the corresponding options /SURF/type/surf_ID.
  2. Input format for SUBSET, SUBMODEL, PART, MAT, and PROP:
    • The external faces from the set of solids which belong to the subset, submodel or part, or which use the material or the property are built. The segments supported by these faces are added to the surface.
    • The segments built from 3-node and 4-node shells are still selected the same way as with /SURF/type/surf_ID.