What kind of effort we have in truss bar?

. What is dimension of snow load?

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

How many unknown forces can enter the section?

What kind of deformation the truss bar has?

. What is context of truss stiffness?

Only normal force arises in the bars of trusses.

The truss bar work on bending.

Please, give an interpretation of the formula for joint snow load.

Trusses are geometrically invariable calculation models formed from rectilinear bars, which are connected to each other at the extreme points in joint, which are loaded in the form of nodal concentrated forces