There should be room to walk round between the end of the beam and the edge of the quadrant. Under no circumstances should the beam overhang the quadrant
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This example is at Stockton Brook top lock on the Caldon Canal |
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This even worse example, where the overhang is over a steep flight of stone steps at Trentham lock on the Trent & Mersey canal |
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Even this innocuous looking overhang forces the operator off the quadrant |
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...while this beam which overhangs the water is equally dangerous |
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