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Superstring (fireworks)
{{Unreferenced, date=July 2019 A superstring, also known as a cracker wall, is a name commonly given to an immense bundle of firecrackers, usually numbering in the hundreds of thousands, which are often a central fixture at fireworks conventions. Although large compound strings of firecrackers have been constructed since firecrackers were invented, the superstring was greatly popularized by the Pyrotechnics Guild International, whose yearly convention often features a huge superstring consisting of well over a million firecrackers. Superstrings are usually constructed over a rudimentary wooden or metallic structure as a sort of curtain wall. At the 1976 P.G.I. (Pyrotechnic Guild International) Convention in Grand Junction, Colorado, member Robert (Rob) Berk came up with the idea of connecting a series of firecracker strings together in order to make a "superstring". Fellow members Lino Nivolo, Rudy Schwerdt, and Bob Luke collaborated in the construction. The final count of this f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Firecracker
A firecracker (cracker, noise maker, banger) is a small explosive device primarily designed to produce a large amount of noise, especially in the form of a loud bang, usually for celebration or entertainment; any visual effect is incidental to this goal. They have fuses, and are wrapped in a heavy paper casing to contain the explosive compound. Firecrackers, along with fireworks, originated in China. History The predecessor of the firecracker was a type of heated bamboo, used as early as 200 BCE, that exploded when heated continuously. The Chinese name for firecrackers, 爆竹(''baozhu''), literally means "exploding bamboo." After the invention of gunpowder, gunpowder firecrackers had a shape that resembled bamboo and produced a similar sound, so the name "exploding bamboo" was retained. In traditional Chinese culture, firecrackers were used to scare off enemies or evil spirits. Firecrackers production and sales Ingredients Firecrackers are generally made of cardboard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pyrotechnics Guild International
The Pyrotechnics Guild International or PGI founded in 1969 is an independent worldwide nonprofit organization of amateur and professional fireworks enthusiasts. Its membership is the largest pyrotechnic community in the world. The Guild has a yearly convention. People from all over the world come to this event that lasts for about a week. Educational and scientific purposes The PGI strives to promote the safe and responsible display and use of pyrotechnics and fireworks. Fireworks display operator training is offered, as well as classes on specific safety and legality issues. The PGI was founded by Max P. Vanderhorck a former meteorologist from San Diego California fueled by his love for fireworks and the preservation of what seemed (at the time) like a dying American Tradition. The PGI encourages the display of public and private fireworks in conjunction with local and national holidays as well as patriotic and other events. Fireworks are a part of our heritage, and only thro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtain Wall (architecture)
A curtain wall is an outer covering of a building in which the outer walls are non-structural, utilized only to keep the weather out and the occupants in. Since the curtain wall is non-structural, it can be made of lightweight materials, such as glass, thereby potentially reducing construction costs. An additional advantage of glass is that natural light can penetrate deeper within the building. The curtain wall façade does not carry any structural load from the building other than its own dead load weight. The wall transfers lateral wind loads that are incident upon it to the main building structure through connections at floors or columns of the building. A curtain wall is designed to resist air and water infiltration, absorb sway induced by wind and seismic forces acting on the building, withstand wind loads, and support its own weight. Curtain walls may be designed as "systems" integrating frame, wall panel, and weatherproofing materials. Steel frames have largely given w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
