. Railway mechanical engineer . truck. Tie bars for cast steel truck side frame ta be of the shorttyj>e, two per frame. Cast steel side frame must meet limiting dimensions shownon limiting dimension drawing, and interchange in all re- ulus vertically 10 per cent greater than pressed steel bolsters must be as strong vertically as pressed steelbolsters. .\\\ bolsters to have a transverse strength at least50 per cent of vertical strength. Center Plates.—(1) Droj) forged, or (2) cast steel. Side Bearings.—See body specifications. Brake Beams.—Each 40-ton and 50-ton truck to be


. Railway mechanical engineer . truck. Tie bars for cast steel truck side frame ta be of the shorttyj>e, two per frame. Cast steel side frame must meet limiting dimensions shownon limiting dimension drawing, and interchange in all re- ulus vertically 10 per cent greater than pressed steel bolsters must be as strong vertically as pressed steelbolsters. .\\\ bolsters to have a transverse strength at least50 per cent of vertical strength. Center Plates.—(1) Droj) forged, or (2) cast steel. Side Bearings.—See body specifications. Brake Beams.—Each 40-ton and 50-ton truck to beequipped with two M. C. B. No. 2 brake beams, and each70-ton truck to be equipped wiOi two M. C. B. No. 3 brakebeams, all conforming to limiting outline and general condi-tions shown on drawing. Brake Shoes.—To be: (1) With reinforced back, or (2)plain cast iron. Wheels.—For the 40-ton trucks the wheels are to beM. C. B. standard for cars having axles with 5-in. by 9-in. 204 RAILWAY MECHANICAL ENGINEER Vol. 92, No. 4. !■.?---- April, 1918 RAILWAY MECHANICAL ENGINEER 205


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering