Manual of recommended practice for railway engineering and maintenance of way (1905)
American Railway Engineering and Maintenance-of-Way Association · Chicago, Ill. : The Association · leaf 86
the diameter of knots or lioles sliall beconsidered as the mean or average diameter in all cases. 74 WOODEN BRIDGES AND TRESTLES. Shakes.—Shakes are splits or checks in timbers which usually cause a separation of the wood between annual rings.Rot, Dote and Red Heart.—Any form of decay which may be… … Fig. 2.—Pith Knot. 76 WOODEN BRIDGES AND TRESTLES.
Railroad engineering · Railroads
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