A practical course in mechanical drawing for individual study and shop classes, trade and high schools (1912)
Willard, William Franklin, 1879- · Chicago : Popular mechanics company · leaf 118
he roof planes of a hip roof. Fig.120. Find the Hne of penetration and lay out the de-velopments of the conical roof and of the roof planeadjacent to the hip, showing the lines of penetrationtherein. Scale, ^ = 1^0. After drawing the plan and elevation from the illus-tration, Fig. 120, pass planes… … from each roof plane parallel to the base of the hiproof. Where this element crosses the circle cut by thesame plane is a point of penetration. A series ofsimilarly acquired points will determine the line ofintersection. To develop a roof plane revolve the point O of theupper corner of the hip into…
Mechanical drawing
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