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Topic: Circles, marshalls and brett< Next Oldest | Next Newest >
roger440
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Posted: 15 Dec. 2018,22:44 QUOTE

Hi chaps, im new here (first post) but have been using the website for a long time.

My question is, with either Marshalls Tegula or Brett Alpha circles, once you have laid the full circle, can you just continue on with the regluar blocks of the same range to make the curcle bigger?

I ask, as the marshalls pics, dont quite look "right" and the the Brett ones taken at to low a level to be sure.And im only "assuming" thats how they have been done.

Im sure some of you have done this, so wondered what the thoughts on this were?
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Tony McC
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Posted: 16 Dec. 2018,13:58 QUOTE

Yes, generally speaking, circle kits from all manufacturers provide just enough of the smaller pieces or wedge-shapes to get you to a complete outer 'ring' that can be formed using full blocks (usually the smallest of those available in the product range) laid with 'gaping' joints that, in theory (and to comply with BS7533:3) should not be wider than 5mm.

From there, you just add as many additional rings as you wish until you reach your desired diameter.

One word of advice with large circles: the trueness of the circle arcs tend to reduce as the circle grows, and on large circles, 10m radius or more, the effect at the outrermost edge can become noticeable, with 'flat spots' on the circumference followed by fast arcs, all of which adds up to a rather freehand look to the circle, even though the inner rings are geomtricly accurate. So, use a tape measure from the origin to ensure that each additional ring, as it is being laid, is being laid accurately.


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roger440
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Posted: 17 Dec. 2018,22:24 QUOTE

Quote (Tony McC @ 16 Dec. 2018,13:58)
Yes, generally speaking, circle kits from all manufacturers provide just enough of the smaller pieces or wedge-shapes to get you to a complete outer 'ring' that can be formed using full blocks (usually the smallest of those available in the product range) laid with 'gaping' joints that, in theory (and to comply with BS7533:3) should not be wider than 5mm.

From there, you just add as many additional rings as you wish until you reach your desired diameter.

One word of advice with large circles: the trueness of the circle arcs tend to reduce as the circle grows, and on large circles, 10m radius or more, the effect at the outrermost edge can become noticeable, with 'flat spots' on the circumference followed by fast arcs, all of which adds up to a rather freehand look to the circle, even though the inner rings are geomtricly accurate. So, use a tape measure from the origin to ensure that each additional ring, as it is being laid, is being laid accurately.

Thanks Tony.

I think your comment about using the small blocks once you go beyond the supplied circle is maybe why it looked a bit odd?

Good tip on the measuring as you go.

Thanks again :)
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