1. Different properties: Truss is a structure in which members are hinged at both ends. Grid is a spatial structure composed of multiple members connected by nodes in a certain grid form.

2. The basic units are different: the basic units that make up the grid are triangular cones, triangular cubes, cubes, truncated quadrangular cones and so on. Truss is a plane or spatial structure composed of straight bars, generally with triangular elements. Truss members mainly bear axial tension or pressure.

3. The design requirements are different: the truss should have members that meet the requirements and good connectors, including rivets, pins and welds. The bar section of grid structure should be calculated and determined according to the strength and stability.

Extended information:

Precautions:

1. In order to avoid error accumulation, the primary and secondary trusses all adopt the method of integral assembling, and the iron bench made of No.16 channel steel is used as the assembling platform. In order to ensure the straightness accuracy of the truss, the chords should be strictly leveled with a level, and thin steel wires should be tightened at the outer ends of the upper and lower chords for straightening the chords.

2. Measure out the positioning sideline of the web member at the node position inside the chord, and install the web member according to the sideline position. After the chord adjustment, some web members are installed at the end, middle and joint positions immediately, so that the truss shape is fixed and deformation is avoided when installing other web members.

3. In order to improve the construction efficiency, avoid the situation of secondary reverse transportation and blocking the traveling route of the crane, the truss is assembled near the installation projection position, and the assembling platforms are arranged on both sides of the passage parallel to the direction of the passage.

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