First, two poles are observed, see if the two poles of the joint is two non-communical connections, and there is no load. If the above two points are met, the two poles are zero poles.

Next, it is determined whether the node of the two lenses is not a common line.

Third, for the three strokes, if the three stroke nodes are loaded on a stroke, the two strokes are on a straight line, the third stroke is zero stroke.

Fourth, comparative Aluminium Lighting Truss, if it is in the action of a symmetrical load, and the K form on the symmetry shaft does not appear, the inclined steel bar at the node is zero steel bar.

Truss classification refinement, stage truss is a very important type of product, which can be convenient according to the needs of the site, ensuring the goal of facilitating and reality applications, its good function and design application foundation, important The role itself, meets different engineering construction needs, but also guarantees a particularly important role in the safety of the stage, especially the special design specifications, and convenient installation applications, which is very important. The zero rod in Aluminium Lighting Truss refers to the rods of the axial force under a certain load. Judging the zero rod is the first step in Aluminium Lighting Truss. It will make subsequent analysis and calculations more smooth. Zero rod judgment method usually has some special shapes of nodes in Aluminium Lighting Truss, and masters the balance of these nodes.