. The street railway review . ^iJM&^Qilu^^AC^ 545. del- the Tremout street mall to Temple place, where the trac-ksseiiaratf to form Ihe Park street In tins part of the tun-nel the root is flat, supported by briek arches turned between I-beams with diagonal struts connecting the vertical and horizontalbeams across the corners. The two-track subway is 24 ft. wide;the four-track is 48 ft. across, the roof being supported in themiddle by a row of steel columns. Sections 4 and 5 consists of two two-track inclines, and a lengthof two-track subway which finally runs into two separate singl
. The street railway review . ^iJM&^Qilu^^AC^ 545. del- the Tremout street mall to Temple place, where the trac-ksseiiaratf to form Ihe Park street In tins part of the tun-nel the root is flat, supported by briek arches turned between I-beams with diagonal struts connecting the vertical and horizontalbeams across the corners. The two-track subway is 24 ft. wide;the four-track is 48 ft. across, the roof being supported in themiddle by a row of steel columns. Sections 4 and 5 consists of two two-track inclines, and a lengthof two-track subway which finally runs into two separate single-track subways; one, for the south-bound cars, is 39 ft. below thesurface and the other, for the north-bound cars, is 17 ft. above it,but the two converge into a double barrel subway, both beingbrought to the same level before reaching Eliot street. Tremontstreet, being but 32 ft. between curbs and a very busy thorough-fare. It was deemed best to tunnel 1,0S5 ft. of section (i, and thiswas done, the shield being from 6% ft. to 13% ft. below the
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
