. Water & sewage works . n averageof 1/lG inch per year. This mile was divided into sections ofabout 25 feet, separated by expansionjoints, there being 209 sections to themile. The most of the sections were sep-arated by four thicknesses of tar paperseparated by thin boards which it wasplanned to remove as the work pro-gressed, tho many of the boards are stillin the pavement. Four of the jointswere protected by pairs of steel anglebars, separated with tar paper and placedwith one leg of each angle back to backso that the other leg of each bar was November, CONCRETE ROADS 409 flush with t
. Water & sewage works . n averageof 1/lG inch per year. This mile was divided into sections ofabout 25 feet, separated by expansionjoints, there being 209 sections to themile. The most of the sections were sep-arated by four thicknesses of tar paperseparated by thin boards which it wasplanned to remove as the work pro-gressed, tho many of the boards are stillin the pavement. Four of the jointswere protected by pairs of steel anglebars, separated with tar paper and placedwith one leg of each angle back to backso that the other leg of each bar was November, CONCRETE ROADS 409 flush with till surface of the concrete,thus covering a space of about 4i. inchesat the joints. The concrete wears slow-ly on each side of the angles, leaving araised joint that is slightly noticeablewhen driving over the pavement. This less imperfect, or 7() per cent, of theentire mile. The remaining portion of Woodwardavenue, 252 sections, was built in 1910using the same materials and the samemix. No blind curb was used and the. REPAIR gang repairing River Roadwith tar in 1913. This gang ofseven men. with outfit, costs $ perday. not invUuling fuel for heating tar. ft) was an experiment whicli has not beenrepeated. Of the 209 sections constituting the firstmile on Woodward avenue, 80 showedlongitudinal cracks, 32 transverse cracksand 2 diagonal cracks while 46 sectionswere recorded as having holes, making atotal of 160 sections which are more or crown was reduced to 2 inches. The soilon this section is considerably more sandy,especially toward the north end. On this portion of Woodward avenue,29 sections have longitudinal, 22 sectionstransverse, and 6 sections diagonal cracksand 11 sections have holes, making a totalof 68 defective sections or 27 per cent, ascompared with 76 per cent. In the firstmile. Mr. Green considers this a good road ingood condition. November, 410 MUNICIPAL ENGINEERING On Gratiot avenue in the season of 1910,9,000 feet of 16-ft. concrete roadway wasbui
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsewerage, bookyear191
