. Electric railway journal . the materialin a small portable gas oven. Short bends in bars up toI in. x 6 in. are made in the punch after preheating. This!tool has also been fitted with a set of cast dies for all stand-ard short bends and will turn out the work almost as fastas a workman can remove the bent bars and replace themwith straight ones. CONCRETE PAVING BETWEEN CAR TRACKS INBIRMINGHAM Concrete pavements between the street railway trackshave been in service in Birmingham, Ala., since April, the concrete was laid directly against both sidesof the T-rails, the pavement alo
. Electric railway journal . the materialin a small portable gas oven. Short bends in bars up toI in. x 6 in. are made in the punch after preheating. This!tool has also been fitted with a set of cast dies for all stand-ard short bends and will turn out the work almost as fastas a workman can remove the bent bars and replace themwith straight ones. CONCRETE PAVING BETWEEN CAR TRACKS INBIRMINGHAM Concrete pavements between the street railway trackshave been in service in Birmingham, Ala., since April, the concrete was laid directly against both sidesof the T-rails, the pavement alongside is in good three and a half blocks of double track were placedoriginally, but during the last year there have been added6y2 miles of single track, making a total of 7 miles onstreets having ordinary heavy teaming traffic. In the ac-companying drawing the dimensions of the pavement andthe kind of concrete used in the various layers are line dividing the 23^-in. top-coat layer is imaginary be-. Concrete Mixer for Track Work at Birmingham cause it was placed over the slag concrete before fhe latterhad a chance to set. After traffic had been removed to one track, the sub-grade for the other track was excavated, the material re-moved, the track built and concrete material dumped along-side of the trench. Very little rolling was necessary, asgenerally the sub-grade is in stiff red clay. First, the trackwas raised approximately to grade and line and supported on piles of slag or blocks under the ends of ties. A Chicagomixer mounted on a short flat car running on the tracksdeposited concrete under the ties and between them to adepth of about 3 in. above the bottom. When the mixerwas moved along, the track behind it was brought to finalline and grade by shovel-tamping the concrete under theties and allowing it to set for seven days. After the baseconcrete had set the mixer was again run along the track • iCrown i ■60 136Slag Concrete^J 24Stone Concre
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Keywords: ., bookcentury1900, bookdecade1900, bookidelectricrailway411913newy
