Young, George, jr, Baxter, Hubert Eugene, joint author · New York, The Macmillan Co. · leaf 43
inclination with respect tothe planes of projection. Ordinary plans and elevations makefrequent use of just such lines to indicate structural parts. Thus,in Fig. 199 a, p. 219, the line ac indicates the hip line of a four-pitched roof. It is only after the true length and the slope ofsuch members… … Ill, § 24] PROJECTION OF LINES 27 and the slopes of normal-case lines. In each method thefundamental idea is to arbitrarily reduce the normal-caseline to a special case (parallel to a plane of projection), and tofind its projections under the altered conditions. 24. First Method for Finding True…
Geometry, Descriptive
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