The truss stage is the temporary stage that we have come into contact with most at present, which are all built with truss structure. The typical external feature of Stage lighting truss is a kind of space structure frame built with numerous aluminum alloy frames. The light stand is the face of the truss stage, and the construction of the light stand will directly affect the overall effect of the stage. Stage lighting truss has its own professional name, called aluminum alloy TRUSS frame.
Stage lighting truss is a plane or space structure frame composed of straight rods and generally has a triangular unit, generally square column type, and is mostly used for outdoor temporary exhibition shed construction. It can take up various shapes without space restrictions. The maximum span of the light frame of the truss stage is 20M and the height is 7M. The specifications of stage lighting truss vary according to the size of the stage.
Stage lighting truss are generally made of aluminum alloy and steel pipe materials, but now the steel pipe material is basically used by few people, and most of them are made of aluminum alloy light fixtures. Stage lighting truss is a single aluminum alloy lamp holder group turned up. The main components of a built-up truss stage system include the following: base, square sleeve, corner, adapter, aluminum alloy light stand, cross arm, gourd and other supporting assembly. On the often seen stage, those frames supported by aluminum alloy are truss stages.
Causes of frequent stage lighting truss accidents:
For the truss that supports the entire stage, the advantages and disadvantages of the materials used are particularly important. At present, the aluminum profiles used to make aluminum alloy trusses in the industry are mainly divided into two categories: one is 6061-T6, and the other is 6082-T6. Although 6061-T6 and 6082-T6 are both magnesium-aluminum-silicon heat-treatable and strengthened alloys, both have excellent characteristics such as light weight, corrosion resistance, high strength, easy processing, and good surface treatment. However, in terms of overall performance, 6082-T6 is better than 6061-T6.
The wall thickness of the stage truss aluminum alloy tube has an obvious influence on the welding quality and load-bearing capacity. A qualified stage lighting truss must have good load-bearing ability to ensure the quality of the stage built and the safety of related personnel, and the thickness of the truss is a very important factor. In order to ensure the safety of the trusses produced, the thickness of the trusses generally used is 4 centimeters or even some manufacturers use "cross" tubes and five-star tubes to produce. In this way, its safety under extreme conditions can be guaranteed. However, some small factories arbitrarily lower the standards and use thin-walled and small-diameter materials for production and processing. The hidden dangers have long been doomed.
A good stage lighting truss not only has good materials and good design, but also has higher requirements on the production process and technology of its manufacturer. The high-quality aluminum alloy truss is welded finely, the welder is regular, and the size is accurate. There will be no screw holes or the truss and the accessories are not in line. Inferior aluminum alloy trusses have rough welding, irregular shapes, and large or small solder joints. High-quality aluminum alloy trusses have been treated with acid, and the surface is bright silver, while inferior aluminum alloy trusses are not treated with acid, and the surface is dull and dull, showing a grayish earth color.
Those aluminum alloy trusses with complex structures and large spans must be lifted by electric devices, such as electric hoists. First, the electric hoist can be used for remote control, but the manual hoist cannot. People must stand under the TRUSS frame to operate. The second is the synchronization of the electric hoist. 8 columns and 8 people pull the manual hoist. Basically, it is impossible to do all the work at the same speed. The uneven height caused the TRUSS frame to tilt and collapse. Third, when using an electric hoist to lift the TRUSS frame, a chain is used to lift it, while a manual hoist is originally a single chain to lift.When the single chain lift does not lift the entire TRUSS frame, the column is unilaterally stressed. At this time, the column must be tilted into the stage, especially if the height exceeds 10M, it is even more unsafe. The electric hoist adopts the chain technology, and the two sides of the column are stressed at the same time, so that the vertical column will not be tilted due to the mutual force. There are also quality problems with electric hoists. When choosing a hoist, it is best to have stable quality, and the best with quality assurance.