. American engineer . nsive for maintenance that they weregradually abandoned and temporary doors substituted. Tem-porary doors are stolen and destroyed in such large numbers thatthe expense for them has also become a large item in the freightcar repair account. The ordinary side door, when made of woodand with ordinary fixtures, has many defects; it frequently getsout of order and also causes a large expense for maintenance. For these reasons, the permanent improved steel door here il-lustrated will be regarded with unusual interest. It has beenused in regular service on the Rock Island for n
. American engineer . nsive for maintenance that they weregradually abandoned and temporary doors substituted. Tem-porary doors are stolen and destroyed in such large numbers thatthe expense for them has also become a large item in the freightcar repair account. The ordinary side door, when made of woodand with ordinary fixtures, has many defects; it frequently getsout of order and also causes a large expense for maintenance. For these reasons, the permanent improved steel door here il-lustrated will be regarded with unusual interest. It has beenused in regular service on the Rock Island for nearly two doors have also been used experimentally on the Chicago& North Western and the Lake Shore & Michigan Southern, andfifty cars now building at Pullman for tlie .Michigan Central willbe equipped with it. The door slides on the inside of the car and thus avoids thedanger to passenger trains which sometimes occurs when theoutside doors hang loose. It is well protected and is not liable iiiki-. Detalls of Christy Steel Box Car Door. 264 AMERICAN ENGIXEER. Vol. 85, No. 5. to be injui-ed by outside forces. Tbe fixtures are so substantialand well arranged that they do not permit of pilfering, and thedoor is so tight that there is no loss from leakage of grain ordamage from driving rain. It also has advantages in loading andunloading. A full car of grain can be completely unloaded andswept out in 28 minutes from the time the car is delivered atthe elevator, while it often takes this long to open the doors andget the sliovels ready for unloading. The main door is made of No. 16 steel plate reinforced byangle irons of different sections and weights, as indicated onthe drawing. In order to render the door satisfactory for theshipping of grain, coal or similar freight, it has two separatedoors or ports, 60 in. wide, provided with simple and securefastenings, permitting their easy and rapid operation. The upperdoor is 24 in. high and is hinged at its lower margin 5 in.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
