. Ontario Sessional Papers, 1894, . onstruction of Macadam roads it i> necessary that the earth foundation shouldbe made to conform to the finished shape of the road : it is also of prime importancethat the earth foundation should be well rolled and drained The metalled surfaceshould be put on in three layers, and each layer well rolled; the last two layersshould have the necessary amount of binding material, and should be watered asdescribed for Telford roads. All the stone for the tir>t two layers should becubical in form and should pass through a 2 J-inch ring, and in the top
. Ontario Sessional Papers, 1894, . onstruction of Macadam roads it i> necessary that the earth foundation shouldbe made to conform to the finished shape of the road : it is also of prime importancethat the earth foundation should be well rolled and drained The metalled surfaceshould be put on in three layers, and each layer well rolled; the last two layersshould have the necessary amount of binding material, and should be watered asdescribed for Telford roads. All the stone for the tir>t two layers should becubical in form and should pass through a 2 J-inch ring, and in the top course thestone should pass through a 2-inch ring. The metalled surface in a Macadam roadneed not exceed, when completed, 9 or W inches, and in many locations wthe traffic is light (i or 7 inches will be found sufficient. The finished Burfaceshould be completed in the same manner as in Telford roads. In the top course good clean gravel m istituted for brokt o stone^witb very good results. Fi<r. 8 shows a cross section of a Macadam Macadam K with Tilr 1 train*. Roads. The fouudation for gravel roads should be prepared in themanner and with Bed for either Telford or lam roads. To maki I the material must be carefully ted ; it should l»- screened and all led that will nol pass thr lugli a 2-inch ring. The la i be broken and used, 01 thej I a first aterial to till in over the tile drains. Gravel should be put on in two or three layers and each layer thoroughly rolled. The [uire a small amount of landing material of course -and in order t make a solid, smoothsurface capable of bearing the heaviest loads without cutting or sinking It thegravel is angular in shape, hard and of uniform size,it will make a hard,durableroad-bed.• 57 Victoria. Sessional Papers (No. i6). A. 1894 The usual way adopted in making gravel roads is to grade the road withdump scrapers and. before it has time to get packed by travel, to put on the gravel,a load or a load and a half to every 1) feet;
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