Final lifting weight on a static pulley system?

[cherish]

Dear Advisor,

I tried to read books and searched all around before posting new topic here... I'm carying out testing a hoisting winch at load 400 kN through a system as in picture.
My problem is that due to fiber rope i only can measure exactly wire tension by a load cell installed through shackle at weight end, so is the formula in locked thread "https://www.physicsforums.com/showthread.php?t=392239" can be applied in my case to find the friction loss then i will deduct and lift an exactly weight less than 400 kN that will give me tension 400 kN at the end of pulley A, the weight of pulley B and C is pretty heavy also.
Hope someone tell me what should i need to find in this case, thanks very much

 

[Navin A S]

.Dear ,Thank you for your question. You will need to determine the tension in the wire rope at the load end of the hoisting winch in order to know how much weight you can lift. The formula in the locked thread you linked should be applicable to your situation. If the friction loss is known, you can subtract it from the 400 kN force and lift the exact weight that produces 400 kN at pulley A. Be sure to also account for the weight of the pulleys B and C when determining the tension in the wire rope. I hope this helps. Best of luck.[Advisor Name]