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#1 Posted : 26 October 2005 13:46:00(UTC)
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Posted By Joe Ridley Hi there, Not strictly H&S but could someone tell me how to work out gradients? I am currently updating some risk assessments for our swimming pools and have come across a recommendation that pool tank floors should not be greater than 1 in 15, what does this mean and how can I work this out? I am not too sure how this is worked out. Hope someone can help. Cheers Joe
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#2 Posted : 26 October 2005 14:44:00(UTC)
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Posted By Arran Linton - Smith Joe, Basically 1 in 15 simply means that for every 15cm forward the floor rises vertically 1cm or (3 degrees), so if you had a hill of 1 in 1 it would be 45 degrees.
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#3 Posted : 26 October 2005 16:42:00(UTC)
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Posted By Robert K Lewis Arran Alternatively it falls 1 cm for every 15 forwards. In the pool situation, as in drains, they tend to look at things as a fall rather than a rise. Same half glass though.
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#4 Posted : 27 October 2005 09:29:00(UTC)
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Posted By Alan Haynes And remember - the distance 'forward' is measured horizontally - not along the slope
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#5 Posted : 27 October 2005 09:42:00(UTC)
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Posted By Joe Ridley Thanks guys, that makes everything a lot clearer. Cheers Joe
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#6 Posted : 27 October 2005 12:15:00(UTC)
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Posted By Adrian Watson Joe, Calculate the angle (~ 4 degrees) and then use an inclinometer to measure the gradient. Regards Adrian Watson
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#7 Posted : 27 October 2005 12:41:00(UTC)
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Posted By Robert K Lewis No methods of actual measurement work under water so you will need to wait until the pool is empty for some other reason to check it. A bricklayers level either 600 or 1000mm long and a ruler are probably all you need then. Bob
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#8 Posted : 27 October 2005 18:15:00(UTC)
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Posted By Adrian Watson sonar? or more practically a measuring stick to dip to the bottom Regards Adrian
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#9 Posted : 27 October 2005 22:27:00(UTC)
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Posted By Robert K Lewis ripply surface can be a problem though. Is there a desparate need to do it urgently?
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