How many kinetic supports has this construction?

How many simple disk has this construction?

The estimated joint snow load, which is applied to the joints of the upper belt of the truss, is calculated according to the formula:

What is dimension of snow load?

What kind of construction is truss?

The truss bar work on

The truss bar work on tenssion or compresion.

Please, explain the meaning of the concept of joint snow load.

What kind of force we have in truss bar?

What is the concept of method of joints?