NBS Source

Double Leaf Roof Hatch - National Oilwell Varco

by Surespan

Staff at National Oilwell Varco were unable to build tall manifold assemblies due to the restricted height of their factory. The only solution was for Surespan to open up the roof on a temporary basis. Surespan manufactured a 4000 x 4300mm double leaf roof hatch which enabled an external crane to lift the manifold units in through the roof. The electrically operated hatch opens in an automated sequence, controlled by a small PLC and activated by the turn of a key. It was specially designed to open and stay open utilising strut locking to withstand agreed wind conditions.

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