The Brew Cabin

Posted: **Wed Aug 29, 2007 9:15 pm**

We wish to use Bradstone Woburn Rumbled (100mm x 134mm) blocks to form a quadrant of a circle. The qudarnt has a maximum radius of 3.6m. We intend to use this as a ramp to the front door. The ramp is 1:12.

We would like the blocks to be laid in a running bond from the outer radius and the continue with a running bond on each course until there is no radius.

We started to lay a couple of courses but found that the 2nd and 3rd courses that the joints were in some instances lining up with each other. This looked incorrect.

We have completed all other areas of paving with some great tips and help from this site. We have trawled the site for tips on this subject but could not find any.

We would apprecite it if anyone has experience in this type of setting out and can advsie of any usefull hints / tips which could assist.

Many Thanks

Chappers

Posted: **Wed Aug 29, 2007 10:08 pm**

it is difficult when only using one size to avoid this.
You may have to use a half block to start the row off on every other row if that makes sense

Posted: **Fri Aug 31, 2007 5:53 pm**

Thanks for this.

We also notice that when we get to a tighter radius then the joints open wider. To avoid this do we have to cut blocks. If so is there a rule to the angle of the cut or do we cut them as we proceed.

Posted: **Fri Aug 31, 2007 6:08 pm**

you should dry space all the blocks first , then look to see what gap there is between each block.
You should be able to mark one block for cutting and cut them all the same, to give a uniform appearance

Posted: **Sat Sep 01, 2007 12:58 pm**

You will need to 'taper cut' the blocks, and the closer you get to the origin of the quadrant, the more cutting will be required.

In principle, it's similar to the detailing shown around circular ICs on this page

As for a 'rule of cutting', in theory there is just such a rule. If you use a bit of basic geometry, it's not difficult to calculate the angle of cut for each individual course, given that you know the radius and the block length. However, short of setting-up a jig on a bench-saw, how do you control the angle of cut onsite? For this reason, most cuts tend to be done to the rack of the eye.

The Brew Cabin

Block paving - Block paving a quadrant