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Posted: Thu Jul 25, 2013 6:27 pm
by seanandruby
Using 500 ml straight kerbs. What offset would I need to form a 12 metre radius? One for the boffs.
Posted: Thu Jul 25, 2013 9:09 pm
by lutonlagerlout
is it a quadrant radius sean?
if so the circumference of a full circle would be 75.39 M
so a quarter would be 18.84 m
if you are using 500mm kerbs you will need 38 No kerbs
this means that each kerb must be 315mm from the perpendicular line to achieve the radius
i think ???
cant you just use a 12m tape and a centre point?
cheers LLL
Posted: Thu Jul 25, 2013 10:10 pm
by seanandruby
No can,t use that method. Just need to use a board with whatever nib on the front and my eye. It's all set out, just thought might be easier with profile board but my maths are shite. Done a load already but still hundreds to do. I know it's 7 ml for a 4. 5 radius on 915 length but mine are metre, or 500 channel kerbs. Thanks.
Posted: Thu Jul 25, 2013 11:00 pm
by lutonlagerlout
maybe its 31mm a time then sean
i may have lost summat ?
cheers LLL
Posted: Fri Jul 26, 2013 5:52 am
by Dave_L
Very impressive Tony - my maths is shite like Shaun's too! 
Posted: Fri Jul 26, 2013 6:33 am
by seanandruby
Appreciate that, thanks. I'm assuming that is evert 500 ???
Posted: Fri Jul 26, 2013 6:47 am
by lutonlagerlout
i am confident in the circunference
just not the rest
btw dave your spelling is shite to
its sean not shaun
cheers LLL :;):
Posted: Sat Jul 27, 2013 11:55 am
by rimexboy
lutonlagerlout wrote:i am confident in the circunference
just not the rest
btw dave your spelling is shite to
its sean not shaun
cheers LLL :;):
:laugh: pmsl
Posted: Sat Jul 27, 2013 3:08 pm
by henpecked
lutonlagerlout wrote:is it a quadrant radius sean?
if so the circumference of a full circle would be 75.39 M
so a quarter would be 18.84 m
if you are using 500mm kerbs you will need 38 No kerbs
this means that each kerb must be 315mm from the perpendicular line to achieve the radius
i think ???
cant you just use a 12m tape and a centre point?
cheers LLL
Yes, the circumference is 24 x 3.14 = 75.36 
Posted: Sat Jul 27, 2013 3:28 pm
by seanandruby
Trial and error tacticts, i just mitre'd each 500ml unit between 5 to 7 ml. Before you say : why bother such a small amount of cutting and just leave a gap, well every one has to be sealed with elastomeric sealant. Thank you for your input