STAAD-Pro X Interoperability
Project:
Engineer.:
Date:
STAAD Interoperability
Muhammad Qasim
10-05-2023
1). STAAD-Pro Local Axis
This document is prepared to help fellow engineers to grasp the concept of STAAD local axis
and avoid confusion during results/end forces interpretations. Beam end forces from STAAD are
as follows:
Axial (FX): Positive = Along local X-axis, Negative = Opposite to local X-axis.
Shear-Y (FY): Positive = Along local Y-axis, Negative = Opposite to local Y-axis.
Shear-Z (FZ): Positive = Along local Z-axis, Negative = Opposite to local Z-axis.
Figure 1: STAAD AXIS ( Green = Z, Blue = X, Red = Y)
Torsion (MX): Positive = Vector along local X-axis, Negative = Vector opposite to local X-axis.
Moment-Y (MY): Positive = Vector along local Y-axis, Negative = Vector opposite to local Y-axis.
Moment-Z (MZ): Positive = Vector along local Z-axis, Negative = Vector opposite to local Z-axis.
For AXIAL Forces:




Positive at the start node indicates compression at the start node.
Positive at the end node indicates tension at the end node.
Negative at the end node indicates compression at the end node.
Negative at the start node indicates tension at the start node.
STAAD-Pro X Interoperability
Project:
Engineer.:
Date:
Figure 2: Member end forces when GLOBAL- Y is vertical
Figure 3: Member end forces when GLOBAL-Y is vertical
STAAD Interoperability
Muhammad Qasim
10-05-2023
STAAD-Pro X Interoperability
Project:
Engineer.:
Date:
STAAD Interoperability
Muhammad Qasim
10-05-2023
2). IDeaStatica Local Axis:
Figure 4: IDeaStatica local axis
Table Below show which forces from STAAD are to be input into IDeaStatica for connection
design purposes:
IDeaStatica
N kN
Vz kN
Vy kN
Mx kNm
Mz kNm
My kNm
STAAD-Pro
Fx kN
Fy kN
Fz kN
Mx kNm
My kNm
Mz kNm