Will this combined pulley system raise a platform evenly?
I am building a garage lift for storage and looking for opinions on if this combined pulley system would work and pull the platform up evenly and consistently. Here is my diagram with data points below:
Data points:
-Max load for this system will be 300 lbs
-Garage attic ceiling is 14 feet
-Electric hoist I am using has max load capacity of 440 lbs
-Rafters are standard 2x6
-Platform is 60"x 40" and weights ~60lbs
-Using swivel pulleys for all locations with 550 lb capacity
-Using steel brackets for all locations with 130 lb capacity
-Using 1/8 vinyl coated steel cable with 320 lb capacity
In my diagram, I have the hoist being bolted directly to a rafter, but I think I will now bolt this onto to side beam and run it up along the same rafter to the a swivel pulley.
I am correct in that effort force will be halved by each pulley in this system?