. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd■spaced 12j^ in. apart between the websfor both the lbs. and the capacity cars, a cover plate 5-16 being used at the top and bottom oftlie channels of the lbs. capacitycars and for the lbs. cars there isone at the top 5-16 in. thick and two at thebottom, one ^ in. and the other 5-16 This gives a minimum cross sec-tion through the draft sills, between thebody bolster and end sill, including draft the minimum area of 24 >q. in. called forb
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd■spaced 12j^ in. apart between the websfor both the lbs. and the capacity cars, a cover plate 5-16 being used at the top and bottom oftlie channels of the lbs. capacitycars and for the lbs. cars there isone at the top 5-16 in. thick and two at thebottom, one ^ in. and the other 5-16 This gives a minimum cross sec-tion through the draft sills, between thebody bolster and end sill, including draft the minimum area of 24 >q. in. called forby the Master Car Builders Association. The difference in the vertical strengthrequirements of the two cars is made upby differences in the depth of drop ofthe truss rods. These are 15^ in. in di-ameter in each case and they have a dropof 20 in. for 60,000 lbs. capacity cars and32 in. for those of lbs. The bolsters are built into the framingand are formed of two pressed steel sec-tions on each side. These have coverplates at the top and bottom. The topand bottom cover plates for the 85,000. ^^^ X!|i-r^- STEEL VNDERFRAME FOR 85,000 LB. CAPACITY & Hudson Co. at a time when such sills were first beinj;applied. At that time the constructionwas not as fully developed as it is now,and the diagonal braces at the ends werenot used, which is now the practice ot•-• road, as shown in the caboose framingcribcd later. Rut. for the sake of uni- rmity, the construction is still contin-ued and the results of six years or moreof service on some of the cars show nobad eflfects. There are two classes of cars that arcbeing treated in this way, namely, thoseof lbs. and 85,000 lbs. capacity, re- hear side castings of sq. in. and 26sq. in. between the body bolsters. Thedifference in sectional area of the twoframes is, of course, not as great a dif-fi rence as that existing between the carcapacities, nor is it necessary or desirablethat it should be,
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Keywords: ., bookcentury1900, bookdecade1900, bookidrailwaylocom, bookyear1901
