. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . and 2 trenails•2 spikes and 2 trenails•2 spikes and 2 trenails;|2 twisted spikes and 2 trenails 2i-inch bolts through ties 112 spikes and 2 screws Inches. Inches. J 1 Inches.§6§6i lis u Inches. Great No dimensions furnished. North British Midland . .. t66 1 m 222i\ li uli u li North Eastern 1,. London ct NorthWestern t6 u \l Notes. — AH of these railways use bullhead rails and chairs. * Has short mileage of chairs secure
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . and 2 trenails•2 spikes and 2 trenails•2 spikes and 2 trenails;|2 twisted spikes and 2 trenails 2i-inch bolts through ties 112 spikes and 2 screws Inches. Inches. J 1 Inches.§6§6i lis u Inches. Great No dimensions furnished. North British Midland . .. t66 1 m 222i\ li uli u li North Eastern 1,. London ct NorthWestern t6 u \l Notes. — AH of these railways use bullhead rails and chairs. * Has short mileage of chairs secured by two |-inch bolts through the ties. t Illustrated by Fig. 1 of Fig. 114. t Illustrated by Fig. 2 of Fig. 114. § Illustrated by Fig. 3 of Fig. 114. II Illustrated by Fig. 4 of Fig. 114. On the Forth Bridge the North British Ry. uses flat-bottom rails fastened to longitudinal beams by wood The twisted spikes are to be abandoned for plain ones. 777777777/ /77777777> ^^/////y///X/ \wii////V ZSZ ^ ^^7/7/^7^^^^^^ 7/>^y/^y/>^///^/^^^/////^////V Akis of Screw SpiKe-? I Va ha bo-H-ofn of Cop Actual Size. HafFSize Diome+er of hole required ■for fhis screw fs Fig. 115. —Screw Spike deduced from European Practice. (Gushing.) 148 STEEL RAILS Fig. 115 shows a design of screw spike deduced by Mr. Gushing fromEuropean practice. The form of the thread seems to have little influence uponthe holding power of the screw spike. Table XXXI gives the resistance forthreads of right-angle form and those of isosceles triangular form. TABLE XXXI RESISTANCE OF SCREW SPIKES HAVING DIFFERENT THREADS(Jules Michel — Revue Generale des Chemins de Fer, June, 1893) Dimensions of Screw Spikes. Isosceles Thread. Right-angled Thread. Remarks. Screw Spikes inch in diameter. New tie. Pitch of inchPitch of inchPitch of inch 11,687 pounds12,458 pounds13,010 pounds 12, pounds12,513 pounds13,561 pounds Average of 4 of 4 of 4 trials
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Keywords: ., bookcentury1900, bookdecade1910, bookidsteelrailsth, bookyear1913
