. Railroad structures and estimates . Fig. 66c. Example. — ah = 4: inches, cd = S inches, he = 84. 84 -^(8 inches + 4 inches) = 7. Angle or spread of frog is 1 in 7, orNo. 7 1k W 11 K ^~~^~t 1 L 1 —*1 PROPERTIES OF of all frog points Oj in. (4 ft. 8^ in. gage). Frog Frog anj rle. Length ofpoint to toe. Length of point to heel. Totallength. Spread attoe. Spread atheel. number. F. W. K. L. T. H. Deg. Min. Sec. Ft. In. Ft. In. Ft. In. Feet. Feet. 7 8 10 16 4 5 8 1 12 6 8 7 09 10 4 9 8 9 13 6 9 6 21 35 6 0 10 0 16 0 10 5 43 29 6 0 10 6 16 6
. Railroad structures and estimates . Fig. 66c. Example. — ah = 4: inches, cd = S inches, he = 84. 84 -^(8 inches + 4 inches) = 7. Angle or spread of frog is 1 in 7, orNo. 7 1k W 11 K ^~~^~t 1 L 1 —*1 PROPERTIES OF of all frog points Oj in. (4 ft. 8^ in. gage). Frog Frog anj rle. Length ofpoint to toe. Length of point to heel. Totallength. Spread attoe. Spread atheel. number. F. W. K. L. T. H. Deg. Min. Sec. Ft. In. Ft. In. Ft. In. Feet. Feet. 7 8 10 16 4 5 8 1 12 6 8 7 09 10 4 9 8 9 13 6 9 6 21 35 6 0 10 0 16 0 10 5 43 29 6 0 10 6 16 6 11 5 12 18 6 0 11 6 17 6 12 4 46 19 6 5 12 1 18 6 15 3 49 06 7 8 14 10 22 6 16 3 34 47 8 0 16 0 24 0 18 3 10 56 8 10 17 8 26 6 20 2 51 51 9 8 19 4 29 0 RIGID FROGS. 221 Soij 8-ON JO J 5 tKst- TV -*j f ?(*- ^F^ ■-^Ifl-^ 00 4 l_ t rtr 4=4 % ::« .1. -? ^i IT %\ J ff i«i. •^ o O T-i i o3 s^ i • V- X ir- ^-j--v I I /, 62 •^ 1Soij 8ON ^3
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