FOK

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FOK

Abbr. for “free of knots.” folded-plate construction, hipped-plate construction Construction consisting of thin, flat elements of concrete, steel, timber, etc., which are connected rigidly at angles with each other (similar to accordion folds), forming a stiff cross section which is capable of carrying a load over a long span.
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The fill or kill order is used by customers wishing an immediate fill, but at a specified price.