Trusses used at stages, for instance portable stage. Purchase instead of rental, since stage truss need to bear a great deal of weight, the old one has used many times, it may get weak as serious rust. On the other hand, the cost - a new one is not more expensive than the one used.
Triangular truss
RK 'Smile' truss devices are usually installed with redundant safety precautions to reduce the risk of an accident caused by a falling or improperly secured truss. Some stage truss (like Triangular truss) is on a triangular design, so it is strength and stability. Extra tip that the design must take into consideration the strength of the timbers, if a wooden truss is used, or the steel.