A.B. Emary's A Comprehensive Practical Geometry for Builders PDF

By A.B. Emary

ISBN-10: 0333319745

ISBN-13: 9780333319741

ISBN-10: 1349060925

ISBN-13: 9781349060924

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4. Draw the plan and elevation (2' - z in the elevation is equal to 2 - 3 in the plan). T. T. of the plane. Proceed as you did in figure 159. The angle required is that seen in the development 1" 2" - 3". The second pipe bending problem is shown in figure 163. The corner round which the pipe travels forms a 120° angle and the pipe is inclined at 45° on both faces of the wall. The geometry involved is similar to that of the previous example. xT T development_----I_ of pipe bend angle Figure 163 Figure 162 51 19.

And similarly draw c' - c and the other lines across the width parallel to c' - c. 3. Lines from points on a - b should be drawn across to meet lines brought down from a - c to give points on the required moulding. CO 6 Figure 139 5 ARCHITRAVES AROUND A DOORWAY Figure 140 shows how the shapes of two architraves around a doorway, unequal in width can be decided. givlZn mitre Figure 138 Proportional reduction Figure 139 shows how a moulding can be reduced proportionately. Let 0 - 1 - 2 - 3 - 4 - 5 - 6 be the given moulding and 0' - 6' be the depth of the required moulding.

Project x" upwards to intersect with the horizontal line brought out from x' in the elevation. x - x" in the elevation is the true inclination of moulding B. c -fFigure 745 B open mitre in plan x"- - - - - - H+t7'f)-'-'------ji---J A 17. INCLINED AND OBLIQUE SURFACES Figures 146 and 147 show the difference between inclined and oblique planes. T. T. their horizontal traces. b inclined plane \ X , a d l plan a Figure 146 b plan 0 Figure 748 b b" b Figure 147 INCLINED PLANES X Figure 148 is the plan and elevation of a rectangular inclined plane a - b - c - d.

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A Comprehensive Practical Geometry for Builders by A.B. Emary

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