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.
The largest superstring ever constructed was built by the Pyrotechnics Guild International in 2006. It was over 1,000 feet long and contained 10,500,000 firecrackers. It was ignited on August 11 and burned for about three minutes. It was ignited from both ends simultaneously and burned towards the center, which was raised into the air on a crane.
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