How many unknown forces can enter the section?

. What is dimension of snow load?

What is the base method of installation use in kinetic analysis for a plane truss?

Where are the loads of truss place?

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

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

The truss bar work on bending.

. What is context of truss stiffness?

Only normal force arises in the bars of trusses.

What kind of deformation the truss bar has?