User:Dhjmayer/Retractable grandstand

A retractable grandstand (also known as a telescopic stand) is a type of stand used in multi-purpose sports, cultural and educational buildings to make a hall multifunctional for different users and applications. The structure is designed to take up minimal space when fully retracted. When extended, visitors can be seated with a good view of the stage or playing field.

Depending on the size of the stand, it can be extended and retracted manually or electrically. Electrically powered stands have a number of possible drive techniques. For example, they can be driven by drum engines or by the rigid chain system.

A telescopic grandstand is constructed of structural steel and includes wheel carriages with vertical support stands, wind bracing, guides, platforms, handrails and chairs or plastic seats. The public function of the telescopic stand requires a guaranteed, safe and stable structure on which people can sit for long periods of time.

Within the European Union, the steel structure must be designed in accordance with the requirements set out in standard EN 13200 (1-3-4-5) and built in conformity with European Construction Products Directive CPR 305/2011. The strength and stability calculations are calculated in accordance with Eurocode 3. The construction should be delivered with a DoP (Declaration of Performance) and CE-declaration. A DoP describes essential properties of a construction product. Telescopic stands fall under the Machinery Directive 2006/42/EC) and must comply with the applicable safety directives.