The classification of Truss structure: Triangular truss: nodal loads along the span uniformly distributed, the upper and lower chord axial force at the endpoints, to cross gradually reduced; webs axial force on the contrary. The triangular truss chord internal force, material consumption is not reasonable, used fortile Roof Truss
Ladder truss: triangle truss rod force has improved, but also for the roof truss can more easily meet the technological requirements of certain industrial plant. Trapezoidal truss on the bottom chord parallel parallel chord truss rod the force trapezoid slightly worse, but greatly reduced abdominal lever type used for bridge and trestle.


Polygon truss: also known as Mansard truss. Winding node is located on the parabola, such as winding arched can reduce the the section load moment, but more complicated to manufacture. Uniform loads, truss shape and Charpy moment graphic, and thus the upper and lower chord axial force distribution uniform, smaller webs axial force, the most efficient use of materials, commonly used in engineering a truss form.


Fasting truss: Basic access polygonal truss shape, winding between the nodes is straight, inclined webs, only vertical webs and the upper and lower chord connected. Bar axial force distribution and similar polygon truss, but asymmetric loads rod end moment value changes. The advantage of the node will be the intersection of bar less convenient construction and manufacturing.