Arc in granite setts using 100mm squares

[selfbuider64]

Here is a question for you all. If I am using 100mm cubes in an arc radiums 100mm with 85 setts per fan, whats the overall width of the fan? Cannot find a calculator online to do this and my maths is rubbish!

[TheVictorianCobbleCo]

You must mean a 1000mm radius? You are looking to establish the chord length of a curve (segment of a circle). Can let you have the formula tomorrow, but - Check elseware on this site or in Tony's book (I've seen it someware) for the layout of fans, or draw it on the ground and lay out the fan.

[selfbuider64]

I found out how to do this it's 1728mm

[lutonlagerlout]

the circumference of a circle is 2 pi R ,the area is pi R2

so if your radius is 1 m and pi is 3.14159265
("may i have a large container of coffee please",is an easy way to remember pi)
so your circumference will be 6.3 m (approx) so your arc length would be 3.14 m and you would have roughly 28 cubes in the big fan
are you getting it yet?
cheers LLL

[DNgroundworks]

erm ye......not

[lutonlagerlout]

in laymans terms if your circle is 2m across it will be 6.3 m in circumference
so if you are doing a block paving detail like this you would need 63 of the blocks for your circle
LLL

[Pablo]

Fan patterns are very difficult if you solely use 100mm setts. It's best to use 60-80's for the tighter radius and the 100's on the outer courses. It doesn't tend to look right otherwise. Cheers.

[selfbuider64]

That makes alot of sense any idea on the ratio of sizes between the two. Noted on the site the use of metal frames to get the layout correct as well

[cookiewales]

That makes alot of sense any idea on the ratio of sizes between the two. Noted on the site the use of metal frames to get the layout correct as well

the metal frames i designed give me a call you can see them in use on the knutsford job on my website click on the link below they help you line up setts but you need skills to get the best from them cheers cookie :;): :;):

[TheVictorianCobbleCo]

Go to "INDEX" at the top of this page, "F", FAN PATTERN - Setting Out", you will see the detail. And be careful, this is not easy for the novice.

[selfbuider64]

Fully aware of your abilities in this department Cookie you will probably get a lookin on the project. We are keen to use mesh backed on this one though. Ours actually are pretty close to the "proper" pattern quite heavy though at 39.21kg per unit but look the part. Client wants mixed colour porphyry with an accent towards the frets which we have covered supply wise. So if he decides to go down the loose route I will be in touch.