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STAAD Commands and Input Instructions
Section 5
5-270
5
6'
10'10
5
78
Z
7
4
6
A
9
C
3
3
8
2
2
B
1
1
4
6
11' 10'
X
Figure 5.28
If the entire floor has a load of 0.25 (force/unit area), then
the input will be as follows:
. . .
LOAD 2
FLOOR LOAD
YRA 12.0 12.0 FLOAD -0.25
. . .
If in the above example, panel A has a load of 0.25 and
panels B and C have a load of 0.5, then the input will be
as follows:
Note the usage of XRANGE, YRANGE and ZRANGE
specifications.
…
LOAD 2
FLOOR LOAD
YRA 11.9 12.1 FLOAD -0.25 XRA 0.0 11.0 ZRA 0.0 16.0
YRA 11.9 12.1 FLOAD -0.5 XRA 11.0 21.0 ZRA 0.0 16.0
LOAD 3
…
The program internally identifies the panels (shown as A,
B and C in the figure). The floor loads are distributed as
trapezoidal and triangular loads as shown by dotted lines
in the figure. The negative sign for the load signifies that
it is applied in the downward global Y direction.