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A round manhole cover of a given diameter has a smaller surface area than a square cover of the same width, thus less material is needed to cast the manhole cover, meaning lower cost. The bearing surfaces of manhole frames and covers are machined to assure flatness and prevent them from becoming dislodged by traffic. Round castings are much ...
In June 2002, Graeme was stuck to a hot tub drain by suction. Efforts by her mother to free her were unsuccessful and when two men eventually were able to free her (postmortem), the drain broke from the force. Although Graeme drowned, her official cause of death was "suction entrapment due to a faulty drain cover". Following Graeme's death in ...