Trying to verifying the hold down force calculation in conspan. Using following formula for verification:
HDF = 1.05 x # of draped strands x 0.8 x strand strength x strand area x (draped strand rise at end of beam / distance from end of beam to hold down point).
HDF = 1.15 x 2 x 0.8x 202.5x0.217x (20/(23.8*12)) = 5. 6 kips
Friction loss taken is 15%
Please let me know if this solution helped you or if you need any additional information.
Hello, I have a question about the initial prestress value used for the holddown force calculation. Is there a way to change the factor applied to the initital prestress? In my model it is set to 0.68 fpu, and I need to change this value to get the correct holddown force.
Thanks!
Please follow the procedure