Hasluck, Paul N. (Paul Nooncree), 1854-1931, ed · Philadelphia, D. McKay · leaf 132
eds withiron roof trusses, the pitch is reducedstill more—to, say, a minimum of 22J°.For Gothic work and for exposed positions,high-pitched roofs are used, say 45° or 60°,and occasionally more, covered with shingles,slates, or plain tiles. The flatter the roof,the heavier the slates should be, and… … angle whose tangent is in the given [case rise J span (for example, 24 == *5), which the tangent of an angle of 26° 33. To setoff the slope of a roof, say, at one-thirdpitch draw the span a b (Fig. 430), divideit into three equal parts, and at the centre of the span c set up the perpendicular c…
Carpentry · Joinery
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