. The Street railway journal . on we tested all welds immedi-ately after cooling by striking them on both sides of the railwith a heavy spike maul, the laborer being instructed* tobreak off the weld if possible. These defective joints wereall repaired by making a special mold to enclose the oldweld and by running another weld close against and at oneside of the old one, over the break in the rail. This yearwe have had seven breaks in this total of 600 joints, all ofthem breaking through the bolt holes. During 1906 we welded 200 joints on the same section ofrail laid in 1902, where the twelve-b
. The Street railway journal . on we tested all welds immedi-ately after cooling by striking them on both sides of the railwith a heavy spike maul, the laborer being instructed* tobreak off the weld if possible. These defective joints wereall repaired by making a special mold to enclose the oldweld and by running another weld close against and at oneside of the old one, over the break in the rail. This yearwe have had seven breaks in this total of 600 joints, all ofthem breaking through the bolt holes. During 1906 we welded 200 joints on the same section ofrail laid in 1902, where the twelve-bolt, ribbed plates hadbegun to show failure through working loose or the railhead had mashed down at the receiving end. In the lattercase the receiving rail was shimmed up and after weldingthe head was ground true to a straight edge by means of ahand-power emery wheel grinder. Thus far but one ofthese joints has proven defective, as there was no expansionor contraction noticeable, the pavement being removed onlyat the JOIXT WELD WITH IIUXD We have also welded during 1906 about one hundredjoints on Pennsylvania Steel Comipanys section 95-272, aT-rail 7 ins. high with 6-in. base and head 3 ins. wide. W^eordered this rail with the first bolt hole omitted. Thus thedistance from end of rail to nearest bolt hole is 6 ins., andas the line change of crystallization fell several inches shortof the holes we have experienced no trouble from the brakesexcept in two instances where long sections were left un-covered along the outside rail, awaiting paving. After this January 12, 1907.] STREET RAILWAY JOURNAL. 61 we banked earth against the rail on long sections withoutexpansion joints. When we began welding this 7-in. rail we found that wecould sledge off the welds and that the iron from the thermitcompound had not united with the rail; also that the ironcame up to the top of the rail head. We subsequently foundthat the mold models had become mixed, and we had usedone of too
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
