. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ys. Suspended 4 and 6 Elsass-Lothringen Hook outside 1 inside and 1outside 91 T. 23 and 24 Square andsuspended 6 Prussian (3) Hook outside 2 outside and1 inside 91 T. 19 and 24per Suspended 6 (1) Use screw spikes on main tracks, and hook spikes on secondary tracks. (2) Use steel ties almost exclusively. Use wooden ties on bridges with steel floor beams, in tunnels and for insulated joi
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . ys. Suspended 4 and 6 Elsass-Lothringen Hook outside 1 inside and 1outside 91 T. 23 and 24 Square andsuspended 6 Prussian (3) Hook outside 2 outside and1 inside 91 T. 19 and 24per Suspended 6 (1) Use screw spikes on main tracks, and hook spikes on secondary tracks. (2) Use steel ties almost exclusively. Use wooden ties on bridges with steel floor beams, in tunnels and for insulated joints inelectric signal districts. (3) In tunnels use cast-iron chairs, wooden wedges, spikes, and trenails identical with Midland Ry., England. Hook spikes are now only used on lines of minor importance. SUPPORTS OF THE RAIL 145 The German railways did not adopt this style of fastening as early or asgenerally as those of France, and the use of the hook spike is quite 1899, the general employment of the screw spike on all lines of the systemwas prescribed for the Prussian Government Railways (Fig. 113, Table XXIX)..
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