Purpose: Defines the topology of the elements 1. Record: Form: KEY, CODE, FORMAT Where: KEY = 3 CODE = C FORMAT = Format indicator 0 = short format 1 = long format Format:(1X,' 3','C',67X,I1) The following block of records must be repeated for each element: The first record initializes an element definition: Form: KEY, ELEMENT, TYPE, GROUP, MATERIAL Short Format:(1X,'-1',I5,3I5) Long Format:(1X,'-1',I10,3I5) Where: KEY = -1 NODE = element number TYPE = element type, see section ``Element Types'' GROUP = element group number, see command ``groups'' MATERIAL= element material number, see command ``mats''. Then the nodes in the correct order have to follow: Form: KEY,NODE,NODE,NODE,NODE, ... Short Format:(1X,'-2',15I5) Long Format:(1X,'-2',10I10) Where: KEY = -2 NODE = node number Additional lines must follow if more nodes are used. Last Record: Form: KEY Format:(1X,'-3')