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Topic: Bills of Quantities< Next Oldest | Next Newest >
john
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Posted: 12 Mar. 2002,10:18 QUOTE

Hi Tony

In your excel spreadsheet for pricing 30m2 of block paving you estimate for 8tonnes of Mot.

To get a compacted layer to 100mm do you not think 8 ton is excessive.Or do I read the spreadsheet wrong

John

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Posted: 12 Mar. 2002,13:14 QUOTE

Hi John,

Good to see you again. :)

8T may seem a lot at first glance, but here's the calculation in detail.

The density for DTp1 is 1.98 T/m3, so.....

30m2 x 100mm = 3 m3 @ 1.98T/m3 = 5.94T

However, the ss allows for spread around the perimeter of, IIRC, 500mm, so we have 22m of perimeter (5x6m = 5+6+5+6) which gives 11m2 extra sub-base....

11m2 x 100mm = 1.1 m3 @ 1.98 m2/T = 2.18T

hence, 5.94 + 2.18 = 8.12T

If you reduce or eliminate the spread, you save quite a bit of stone.  :)

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john
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Posted: 12 Mar. 2002,14:05 QUOTE

Cheers Tony

Theres no catching you out is there.

John

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