Design Everywhere: Manhole Cover
In deze editie van Design Everywhere: putdeksels
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De bekende rioolputdeksels, ontworpen door O. Zimmerman, bijten de spits af:
Manhole cover, also known as ‘buddy’ or ‘berrie’. Cast iron variant embedded in concrete, designed by O. Zimmerman during the fifties. His company, perhaps somewhat awkwardly called TBS (Dutch: Technisch Bureau voor gietijzerproducten Soest) has been producing these covers since the 1930’s and can now be considered the market leader in manhole covers.
It takes about an hour and a half before the metal has cooled down enough to be removed from the mould, further cooling takes about a day. The cover needs this weight because it can be sucked out of the ground when a race car rides over it, as a result of the low pressure under the car.
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Foto: Job Jansweijer
Tekst: Bob Groeneveld
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