Dear Ehsan,
you must divide it into his components. And yes, the load at 0 distances is considered to be applied at the joint. You can make a simply supported beam in order to prove it. Regards,
Thank you for your reply. Actually I figured out a way to appled the force and I see it better to share it with you.
The model that I had in SAP was a steel from for a warehouse with inclined roof. The wind load appled perpendicular to the roof at the joints. So I defined new coordinate system and I rotate it equal to the angel of roof then I appled the wind force in the Z direction of the rotated axis.
Regarding the second question I did not know that and thanks again for your valuable information.