. The Street railway journal . rods at the bottom, hung in stirrups of twisted steel and having an eye at the top through which the5-16-in. round rods of the floor slab were inserted. The girderrods were placed within 2 ins. of the bottom of the girder, thetwo lower rods running straight from end to end, while the this length of time a stream of cold water was turned upon thefloor from a regular fire hydrant delivering at 65 lbs. pressure,and the structure was cooled as rapidly as possible in this is interesting to note that the total deflection under the loadof 150 lbs. p
. The Street railway journal . rods at the bottom, hung in stirrups of twisted steel and having an eye at the top through which the5-16-in. round rods of the floor slab were inserted. The girderrods were placed within 2 ins. of the bottom of the girder, thetwo lower rods running straight from end to end, while the this length of time a stream of cold water was turned upon thefloor from a regular fire hydrant delivering at 65 lbs. pressure,and the structure was cooled as rapidly as possible in this is interesting to note that the total deflection under the loadof 150 lbs. per sq. ft. and the effect of the fire was only 2 5-12ins. at the center of the floor slab, although the floor recovered1 5-12 ins. of this after thoroughly cooling. It was found thatno separation had taken place between the slab and the beams,and no spalling of exposed surfaces was found, even though thebottom surface of the slab had been at a cherry red heat. Afterthe concrete had become thoroughly cooled it required a total. PART FLOOR PLANS OF THE FIRST AND SECOND FLOORS OF THE NEW SHOP BUILDING, SHOWING ARRANGEMENTS OFTRANSFER TABLE RUNWAYS, TRACKS, PITS, OFFICES, PAINT VAULT, ETC. two upper rods were bent up at each column support in orderto resist horizontal shear and take up any negative bendingmovement due to the monolithic structure, as this system ofconstruction provides for. The floor was 5 ins. thick, havingone layer of 5-16-in. round steel rods, spaced at 8-in. centers,at the bottom, and another layer of similar rods running fromthe bottom of the slab at the center to the top of the floor atthe outer edge, in order to strengthen the overhang of 14 the girders. After the structure had become thoroughly set, a load of pigiron, amounting to 150 lbs. per sq. ft., was placed upon thefloor, although no deflection whatever was noted as a result ofthis load. After this an intense fire was started from oak cordwood within the furnace enclosure beneath the floor a
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
