Traditional Culture Encyclopedia - Photography major - Difference between black cloth and white cloth of truss

Difference between black cloth and white cloth of truss

The biggest difference is that the frame is opaque after stretching.

Ordinary spray-painted cloth is generally white or yellow, which is easy to make the picture look too light and unsightly because of light transmission. At this time, it is necessary to switch to black and white cloth, and the black base film can play a good shading effect.

Characteristics of truss:

A plane or space load-bearing member composed of several straight bars, usually with triangular elements.

Under load, truss members mainly bear axial pressure or tension to make full use of the strength of materials. When the span is large, they can save materials, reduce self-weight and increase stiffness compared with solid web beams, so they are suitable for long-span load-bearing structures (such as roof truss, supporting truss, floor truss beam, bridge and crane bridge) and high-rise structures (such as transmission line towers, radio towers and satellite launch towers).

Others, such as hydraulic gates and crane frames, can also use trusses. The disadvantage is that the labor consumed in manufacturing and the structure itself occupy a lot of building space.