|Grid replacement for trapdoors
|The screenhouse trapdoors at Croft provide access to aggregate storage bins some 40 feet below. Built originally in wood, they no longer fitted perfectly due to warping. When opened during clean-up operations they posed the risk for slips and trips with a potential major fall through the metre square trapdoor. The problem has been overcome by installing metal grids which allow stone to be dropped into the bin without having to be lifted.
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Grid replacement for trapdoors