Dear Professor Taylor and dear FEAP Admin,
I am applying a triangular distributed load on a face of the vertical wall in 2d using Csurf command.
The height on which this distributed load is applied should change with time.
For example the parameter y should change with time until it reaches to the top of the wall.
csur
norm
linear
1 10 y 0
2 10 10 -f
I have tried fprop using many props but there i don't get desired distribution of loads and it is not smooth variation

Should i have to change boundary conditions during solution? I am relatively new to feap and don’t have knowledge about macro file etc.
It will be really grateful if you could guide me to solve this problem.
Thanking you in advance.