how to make a lifting plan by crane including the following:

-lifting Calculations
-lifting tackles calculations
-crane capacity

 

The simplest way is to look at the power requirement at any given point in the power transmission train (which will be the same except for losses from reduction, etc.)

You should know your load weight and speed at which you want to lift or lower it, and at least be able to estimate the weight of lifting arms, tackle, etc., that is in motion with the actual load.

You should treat the load as slightly heavier than it really is for lifting because you have to accelerate it to get it into motion, and that acceleration looks like extra weight, say 10% or so, to the motor. You must also include some way to dispose of the energy that comes back from the motor when you're lowering the load (if your application involves doing that). Braking resistors, regeneration electronics, etc. For horizontal travel, the "weight" you use for power calculations is the acceleration you need to provide times the total mass that's being moved. For example, say your load mass is 2 tons, and your crane weighs another 2 tons. If you want to accelerate at 0.1g (3.2 ft/s^2), you need to provide 800 lbs of accelerating force. Take that number times your desired peak velocity, and it will give you your work power. Add the drive train inefficiency and some safety factor, and you have your rated motor size.

1 hp = 550 ft-lbs/second or 33,000 ft-lbs/min. You can check the catalog of your gear reducer manufacturer to get an idea of the overall efficiency or efficiency per state for their boxes.

Other than that, it's all just normal mechanical engineering. Bending strength of shafts and so on.

That all having been said, there are large personnel and equipment safety as well as liability concerns, so this isn't something you should get involved in unless you know what you're doing or your work is supervised in real time or reviewed prior to construction by someone who does.