. American engineer and railroad journal . ents, there is probably no one part of the box car that is asource of so much trouble and expense as the roof. The con-ditions to be met by the roof on a box car, particularly on one ofall-wood construction that has been in service some time, arevery difficult and many different schemes have been proposed tomeet them. Some of these have proven to be very succssfulunder ordinarv conditions, and others, while seemin<j to be ca- This roof is being furnished in two designs, one comprisingthe whole roof, including purlines, carlines, ridge pole, running
. American engineer and railroad journal . ents, there is probably no one part of the box car that is asource of so much trouble and expense as the roof. The con-ditions to be met by the roof on a box car, particularly on one ofall-wood construction that has been in service some time, arevery difficult and many different schemes have been proposed tomeet them. Some of these have proven to be very succssfulunder ordinarv conditions, and others, while seemin<j to be ca- This roof is being furnished in two designs, one comprisingthe whole roof, including purlines, carlines, ridge pole, runningboard and all attachments, which is called the all-steel type, andthe other, called the outside type, is arranged for applicationover the present roof, which may have any style or arrange-ment of members. An essential feature in both designs is thatthe running board and all weight coming upon it are supportedentirely and directly from the carlines. This construction is ar-ranged to fullil every reipiirement of the new safety INTI-KIOR OF CAR FITTED WITH THE .^LL-STEEI. TYPE OF FR.\NKHN FLEXIBLE KiiOF. pable of fulfilling the conditions, have not satisfactorily stoodthe test of practice. Perfect flexibility in all directions is anabsolute requisite of a successful box car roof, but combinedwith this, it must also possess great durability, be capable of suc-cessfully withstandnig mechanical injury and come within rea-sonable limits as to weight and cost. A new type of roof, which it is believed fulfils all of theseconditions and has added advantages in connection with an im-proved attachinent for running board and reduced clearances,has been designed by the Franklin Railway Supply Co., 30Church street. New York City. Roofs of this design have beenin service in sufficient quantities and for a sufficient length oftime under different conditions to indicate that the expectationsof the designers are being fultilled. 1 he general basis of the design is ihe formnig of th
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
