. American engineer and railroad journal . t walls, and so grading as to shed water into the leadersto the sewer. The roof was smoothed over completely with ce-ment mortar to fill up all cracks, and the entire lower surfaceof the roof was plastered over flush with the lower sides of theT-iron purlins. Upon the top of the tile filling five courses ofthe best roofing felt were laid, each course being bedded inhot asphalt and each strip of felt overlapping its neighbor byone-fifth of its width. All the courses are laid in an unbrokenlayer in the gutter up against the parapet wall, each beingcemen
. American engineer and railroad journal . t walls, and so grading as to shed water into the leadersto the sewer. The roof was smoothed over completely with ce-ment mortar to fill up all cracks, and the entire lower surfaceof the roof was plastered over flush with the lower sides of theT-iron purlins. Upon the top of the tile filling five courses ofthe best roofing felt were laid, each course being bedded inhot asphalt and each strip of felt overlapping its neighbor byone-fifth of its width. All the courses are laid in an unbrokenlayer in the gutter up against the parapet wall, each beingcemented up under a joint in the parapet capping. A course ofscreened gravel laid in a thick layer of hot asphalt above thefelt completes the roof. The rain leaders are connected tothe roof through copper flashings 30 ins. square, set into thetile and overlapped by the roofing felt: these flashings leaddown through copper-wire screens to 4-in. wrought-iron rain novembee, 1902. AMERICAN ENGINEER AND RAILROAD JOURNAL. 33S r r ~^_jlJ—,.- -^ =^t. Tunnef to 334 AMERICAN ENGINEER AND RAILROAD JOURNAL.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
