Specifying concentrated loads (nodal and member) by elevation and azimuth angles (El = alpha, Az = beta) is supported in 3D-Frame.
Full format specification:
[[El=]alpha][:[Az=]beta]
El=10:Az=15
10:Az=15
El=10:15
:Az=15
:15
El=10
10
See also Azimuth-Elevation transformation