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STAAD Commands and Input Instructions
Section 5
5-266
where:
f
1
f
2
Global coordinate values to specify Y, X, or Z range. The
floor/oneway load will be calculated for all members lying
in that global plane within the first specified global
coordinate range.
f
3
The value of the floor/oneway load (unit weight over
square length unit). If Global direction is omitted, then
this load acts parallel to the positive global Y if command
begins with YRA and based on the area projected on a X-Z
plane. Similarly, for commands beginning with XRA, the
load acts parallel to the positive global X and based on the
area projected on a Y-Z plane. Similarly, for commands
beginning with ZRA, the load acts parallel to the positive
global Z and based on the area projected on a X-Y plane.
f
4
- f
7
Global coordinate values to define the corner points of the
area on which the specified floor load (f
3
) acts. If not
specified, the floor load will be calculated for all members
in all floors within the first specified global coordinate
range.
GX,GY,GZ: If a Global direction is included, then the load is re-
directed to act in the specified direction(s) with a
magnitude of the loads which is based on the area
projected on a plane as if the Global direction was omitted.
The Global direction option is especially useful in mass
definition.
FLOORGROUP NAME: Please see section 5.16 of this manual for
the procedure for creating FLOORGROUP names. The
member-list contained in this name will be the candidates
that will receive the load generated from the floor
pressure.