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 76
e standard drilling for rails should be as follows: End of rail to center first hole 2^| in. Center of first hole to center second hole 5 in. Center second hole to center third hole 5 in. Diameter of hole in rail should be /le-in. larger than diameter ofbolt used. The punching in splices should be… … STANDARD DRILLING FOR SIX-HOLE SPLICE.
Railroad engineering · Railroads
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