For setting out curved walls and kerbing a good eye is required in addition to mechanical aid. Small curves on the ground may be struck of required radius with a scriber and reel of brass wire, or more roughly with a tape line and pointed stick. A wooden template will be found useful in adjusting the work. For large curves, detached points may be marked out by stakes on the ground, as shown in accompanying figure, where b = c/2, c = a2/radius = feet in offset. In setting out, continue the straight direction past the tangent point to whatever distance is decided upon for length a, then take an offset b as per formula aud range through tangent point aud offset point to get next offset.

Setting Out Curved Walls and Kerbing.