69. Built-in Gutters. (Carpenters' Specification.)  (-1) Form gutters as shown on the plans, and as directed by the architect, of ⅞-inch boards with nail heads set and all surfaces smooth. Consult with the sheet-metal contractor on all details in connection with his work.

   (-2.) Set wood blocking and ⅞-inch sheathing in masonry gutters as shown on the plans and directed by the architect to form backing for lining sloped to outlets. Make all surfaces smooth with nail heads set. Consult with the sheet-metal contractor on all details in connection with his work.

70. Built-in Gutters. (Masons' Specification.) Cut all reglets for gutter-linings as shown on plans or directed by the architect. Set all batten and nailing strips in masonry necessary for the sheet-metal work.

   Form all depressions in masonry for outlet boxes as shown on the plans.

   Form slopes to outlets in gutters and back of projections which flashed.

   All concrete surfaces to be covered with flashing shall be washed smooth with neat cement. Where cinders have been used in the concrete it shall be painted with two heavy coatings of asphalt paint.

   Consult with the sheet-metal contractor on all details in connection with his work.

71. Outlets for Built-in Gutters. Outlets shall be formed as shown on the drawings. The gutter lining shall be turned into them and secured by soldered lap seams.

   Holes shall be cut as soon as the lining is placed and temporary spouts shall be put in until the permanent drainage is ready.

   Outlets shall be connected to leaders by

   (-A.) a 20-ounce copper tube;

   (-B.) a 4-pound lead gooseneck.

   Connections shall be flanged at the top and soldered to the outlet-box lining; the bottom shall have soldered to it a brass ferrule or caulking ring furnished by the plumbing contractor.

72. Cast Strainers. All outlets from gutters and roofs shall be provided with heavy, cast brass, removable strainers the full size of the outlet-box.

73. Roof Drains. (-A.) Approved types of patented roof drains may be used. They shall be furnished and set by the plumbing contractor and connection shall be made to them by the sheet-metal contractor in strict accordance with the manufacturer's directions.

   (-B.) Roof drains shall consist of a circular or square pan whose diameter or side shall measure at least 4 inches greater than the outlet, and have a depression of not less than 1½ inches.

   They shall have a flashing extending out on roof surfaces, on all sides of the pan, not less than 6 inches. The flashing or pan shall be provided with a rib forming a gravel-stop or of proper height to receive (1) built up (2) promenade-tile roofing.

   (-C.) Roof drains shall consist of a copper flange extending out on the roof on all sides a distance at least equal to the size of the outlet. The flange shall be provided with a rib or gravel-stop against which to finish (1) built up (2) promenade-tile roofing.

   Outlets from drains shall consist of

   (-A.) a 20-ounce copper tube, soldered to the (A) pan; (B) flange, and (1) extending into the drain pipe at least 6 inches with the outside coated with asphaltum; (2) with a brass ferrule or caulking ring soldered to the end for connection to the drain pipe by the plumbing contractor.

   (-B.) a 4-pound lead gooseneck, flanged at the top and soldered to the (A) pan; (B) flange. Connections to the drain pipe shall be made by the plumbing contractor.

74. Roof Drains and Gutter Outlets. (Plumber's Specification.)(-1.) Furnish the sheet-metal contractor all brass ferrules necessary for connecting the drainage system and the roof drains and outlets shown on the plans, and connect copper tubes fitted with these ferrules to the drain pipes by caulked and leaded joints.

   (-2.) Furnish and install complete with all piping connections the patent drains shown on the plans. Make provision, where necessary, for the work of other trades in connecting to the drains.

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