FIREPROOF SAFES
THEY GET A " GRILLING " i . Before a safe can be labelled legally as “ fireproof,” it must undergo stringent tests, states a London paper. It is filled with papers, sealed with fireclay, rolled into a roaring furnace, and subjected to gas flames for an hour. When red hot, it is drawn out and dropped 30ft on to a concrete block, which is the kind of thing that would ‘happen if it was on an upper floor. It is then grilled for another hour at 1 700 deg C., more violent heat than most burning buildings give out. Finally it is chilled with water and then broken open. If tho papers within are not scorched, tho safe is passed as fireproof, otherwise it is melted down and fireresisting alloys added.
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https://paperspast.natlib.govt.nz/newspapers/ESD19400912.2.6
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Evening Star, Issue 23679, 12 September 1940, Page 2
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130FIREPROOF SAFES Evening Star, Issue 23679, 12 September 1940, Page 2
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