. The Street railway journal . A—FIG. 9 B—FIG. 9. latest high-speed electric cars. The ^-in. plate on the outsideof the sill is undoubtedly a concession to the prejudices of man-agers. The 9-in. I-beam is amply sufficient for the work with-out the ^-in. plate, but if it is considered necessary to have anadditional strength the same result may be much more econom-ically obtained by using the metal in a different form, as shownin B. Here a 12-in. I-beam carries a rider 3^ ins. x 4j4 use of the 12-in. instead of the 9-in. beam produces a savingof more than 11 lbs. per running yard. The st
. The Street railway journal . A—FIG. 9 B—FIG. 9. latest high-speed electric cars. The ^-in. plate on the outsideof the sill is undoubtedly a concession to the prejudices of man-agers. The 9-in. I-beam is amply sufficient for the work with-out the ^-in. plate, but if it is considered necessary to have anadditional strength the same result may be much more econom-ically obtained by using the metal in a different form, as shownin B. Here a 12-in. I-beam carries a rider 3^ ins. x 4j4 use of the 12-in. instead of the 9-in. beam produces a savingof more than 11 lbs. per running yard. The strength, however,is somewhat greater than in the combination. The rider June 6, 1903.] STREET RAILWAY JOURNAL. 837 becomes simply a strip into wliicli the posts are mortised and towhich the floor is nailed. This construction would necessitatea complete steel under-frame, carrying on its top the necessarynailing strips. Fig. 10 is a form which has been employed in Europe. Thestrength is obtained by a bulb-iron or deck beam, an alternativeform is s
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
