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STAAD Commands and Input Instructions
Section 5
5-44
Limits
There is a limit of 21 Mesh commands. Up to 33000 joints may be
generated and up to 67000 elements. Total number of joints in the
model after this command is completed may not exceed 100,000.
Notes
All coordinates are in current unit system. While using this facility
the user has to keep the following points in mind:
1. All super-elements must be 4-noded or 8-noded. Generated
elements for 4-noded super-elements will retain the straight-line
edges of the super-elements, while joints of elements generated
from 8-noded super-elements will lie on a curved trajectory.
D
B
C
A
G
F
E
D
H
C
A
B
Mesh generated for a Mesh generated for a
4-noded super-element 8-noded super-element
Figure 5.2
2. 2 super-elements, which have a common boundary, must have the
same number of elements along their common boundary.
3. Sequence of super-elements - MESH commands define the super-
elements. The sequence of this MESH command should be such
that once one is defined, the next super-elements should be the
ones connected to this. Therefore, for convenience, the first super-
element should be the one, which is connected by the largest
number of super-elements. In the example shown here for the tank,
the bottom super-element is specified first.