Traverse (event technology)

Equipped traverse

As Traverse ( English Truss ) in the event technology referred to modular truss, which are used for accommodating payloads or decorative constructions construction. They consist of aluminum or steel , with steel being used practically only in the heavy-duty area or for special components. Other materials are currently of no relevance.

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As a general distinction between the various systems, the number of chords and the type of connector are used. The number of straps has the greatest influence on the use, which is why it is most common to type trusses accordingly. These are then referred to as 1-, 2-, 3- or 4-point trusses. The cone connector, fork connector and plate connector are common connector shapes.

1-point traverse

1-point trusses (aluminum bars) are usually mounted between two other trusses in order to e.g. B. to hang a mirror ball on it or to stabilize a roof on open-air stages or festival stages . They can also be connected with conical connectors, such as the 2-, 3- and 4-point trusses.

2-point traverse

2-point trusses are often found in theaters as curtain rails or for lights (part of the upper machinery ). At events this form is also used for curtains , molton or foils. It can also be used in a ground support as an additional floating unit or as an additional carrier.

3-point traverse

3-point trusses are mostly used for small events as decorative trusses and for special constructions. The most famous special construction is the circle. A film is usually clamped in these for projections with moving heads or beamers . As with the 2-point traverse, this shape can also be used in a ground support as an additional floating unit or as an additional carrier.

4-point traverse

The 4-point truss is the most common form. It has the highest mechanical stability of the four designs. As a normal or heavy-duty crossbeam, this form is mostly used for so-called ground support or for stage construction.

Designs

tripod

This design is mostly used at small events, trade fairs or conferences. There are two tripods on the outer part and the traverse between them. The possible load depends on the tripods and the route, as well as the payload of the traverse itself. B. three tripods or as a Carré (square construction). For smaller events, simple crank stands can often be found for this purpose, if greater heights or heavier loads have to be overcome, stands with electric drives (lifts) are ideal.

Floating

The floating form is often found in halls and theaters, where ground support cannot be set up for reasons of space or decoration. A load section or a square is pulled up by several motors or hand chain hoists.

This construction is secured by steel cables or “driven” by motors (according to BGV-C1 or at least according to BGV-D8 +).

Ground support

Ground support is the best-known form of truss construction, whether it is pulled up with motors through sleeveblocks on towers or built with fixed corner blocks as a trade fair and decoration. This has the advantage that it can be set up in any hall and on any place, making you independent.

In addition, the design allows additional features such as floating fixtures, such as B. prospectus trains or other forms of crossbars (e.g. the round shape with canvas).

The loads depend on the size and type of tower and trusses. For construction with a roof (stages) there are extra heavy-duty cross beams. However, these are also used at large concerts, as the structures are very complex and therefore carry a high dead weight.

stage

As already described for ground support , a stage made of a truss construction is nothing more than a ground support with a roof.

The roof load can increase very quickly due to rain or snow, which is why special trusses are necessary here. These heavy-duty cross beams are also available in aluminum. A few years ago these were made entirely of steel.

Normative regulation

Constructive and static measurements are carried out in accordance with the Eurocodes standards introduced by the building authorities . Furthermore, trusses in the event area fall under the upper machinery and are classified as support means. The industry standard SQP1 trusses from igvw is intended as a basis for both manufacturers and users and summarizes all basic information and normative references.

Essential standards and regulations:

• SQP1 trusses
• DIN EN 1993 Dimensioning and construction of steel structures
• DIN EN 1999 Dimensioning and construction of aluminum structures
• DIN 15020-1 / 2 hoists; Principles for rope drives
• DIN 56920-3 theater technology; Terms for stage equipment
• DIN 56921-1 Theater technology, stage machinery - Prospect hoists - Part 1: Hand counter hoists with a load capacity of up to 500 kg
• DIN 56950 event technology - mechanical equipment - safety requirements and testing
• GUV 4.2 VBG D8 winches, lifting and pulling devices
• GUV 4.6 Load suspension devices in hoist operation
• GUV 14.3 ZH 1/461 Safety rules for pull-up access equipment
• GUV 66.15 ZH 1/222 Principles for the testing of facilities in stages and studios
• BGV C1 Accident regulations for event and production facilities for scenic representation

literature

• SQP1 trusses
• Jörg Mielchen, Stefan Kluge, Siegfried Stäblein (Eds.): DTHG Professional Handbook 2011: for theater film television show event . DTHG Service, Bonn 2011, ISBN 978-3-9808624-0-0 .
• Max Keller, Johannes Weiß: The fascination of light: light on the stage . 4th, revised, updated and expanded edition. Prestel Verlag, 2010, ISBN 978-3-7913-4372-3 .
• BGV C1

Individual evidence

1. ↑ ^{a b} SQP1 ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Traversen, March 2010 (PDF; 868 KB) 
2. ↑ ^{a b} BGV C1. ( Memento of the original from June 20, 2016 in the Internet Archive ; PDF; 290 kB) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Accident prevention regulation: event and production facilities for scenic representation, from April 1, 1998