Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

152 Molesworth’s pocket-book Curved Roofs. S — Span of girder. W = Weight distributed. K — Strain on any bay of top or bottom flange. ~ Distance of apex of any bay from the nearest point of support. I = Length of perpendicular from base of bay to apex. z - Angle of any bay of the flange with horizon. V = Vertical component of strain in any bay. Wtf(S-a) “ 28/ * V R sin. Z. For strains on bracing, see next page. The diagram given in the next page is another variety of the same species of roof, and is subject to the same calculations.