Radius

[seanandruby]

Using 500 ml straight kerbs. What offset would I need to form a 12 metre radius? One for the boffs.

[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

[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.

[lutonlagerlout]

maybe its 31mm a time then sean
i may have lost summat ?
cheers LLL

[Dave_L]

Very impressive Tony - my maths is shite like Shaun's too!

[seanandruby]

Appreciate that, thanks. I'm assuming that is evert 500 ???

[lutonlagerlout]

i am confident in the circunference
just not the rest
btw dave your spelling is shite to

its sean not shaun

cheers LLL :;):

[rimexboy]

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

[henpecked]

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

[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