. Railway master mechanic [microform] . Fig. 1—Section Under Box Car. between the body bolsters and are not continued to theend sills. The truss rods are secured at each end by twowrought iron straps which are riveted to the under sideof the guesset plate previously mentioned and the rivetspass through the upper member of the bolster plate. Theend of the rod straps are anchored through the gussetplates and bear against the bolster. The needle beams,supported by the truss rod bearing struts, are 10-in. Ibeams weighing 25 lbs. per foot and bear against L-shaped pieces which are riveted to the we
. Railway master mechanic [microform] . Fig. 1—Section Under Box Car. between the body bolsters and are not continued to theend sills. The truss rods are secured at each end by twowrought iron straps which are riveted to the under sideof the guesset plate previously mentioned and the rivetspass through the upper member of the bolster plate. Theend of the rod straps are anchored through the gussetplates and bear against the bolster. The needle beams,supported by the truss rod bearing struts, are 10-in. Ibeams weighing 25 lbs. per foot and bear against L-shaped pieces which are riveted to the webs of the the principal horizontal strain imposed by the trussrods comes on the top flanges of the center sills, they are. Fig. 2—Steel Underframing of ioo,ooo-lbs. Capacity Box Car. August, 1904. RAILWAY MASTER MECHANIC 323 latticed by a double system of lattice bars 2^2 in. by ^ in. The steel sills are trussed laterally by five 9 in. chan-nels weighing lbs. per ft., spaced equally betweenthe bolsters. These channels are secured by angle ironsriveted to the sills and constitute floor beams for carry-ing nailing strips for the car flooring. The center sillsare arranged two inches lower than the side sills to pro-vide against cutting away the flooring on account of theinterference of rivet heads. The end sill arrangement is a design of more than pass-ing interest inasmuch as it is so secured to the remainderof the framing as to be readily removed and replacedin case of injury. It is secured by angle irons to the foursills only and consists of a l/± in. plate bent to Z shapewhich may be formed in any blacksmith shop. As beforementioned the truss rods do not extend to the end silland therefore it is
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Keywords: ., bookcentury1800, bookdecade1890, bookidrailwaymaste, bookyear1895
