b'CSA 123.26:21TABLE 7: RAIN WATER CONTROLSILVER GOLDMinimum two-per-cent main positive slope for the roofMinimum two-per-cent slope provided by the structure. surface. Slope can be provided structure, slope package orBack slope (can only be provided by insulation or insulation insulation. Back slope (can only be provided by insulation orfill) must be double the main slope.insulation fill) must be double the main slope. Minimum drain diameter is three inches. Drain sumps requiredMinimum drain diameter is four inches. Drain sumps required with a slope of four per cent. Scupper opening height is fourwith a slope of four per cent. Scupper opening height is six inches, while the width must not be less than the circumfer- inches, while the width must not be less than the circum-ence of the roof drain in the same area. (E.g., Three-inchference of the roof drain in the same area. (E.g., Four-inch drain has a circumference of 9.4 inches, so scupper would bedrain has a circumference of 12.6 inches, so scupper would be minimum four inches high by 9.4 inches wide.) minimum six inches high by 12.6 inches wide.)Every roof requires a primary and secondary drain or other method. One internal drain or scupper shall be installed on each roof section. Each drain shall have a corrosion-resistant strainer and a 24-inch-diameter screen to catch debris. Screen requires a zinc strip to minimize vegetation growth.Secondary drains or scuppers shall be installed at a minimum of two inches above the finished roof surface, located in the lowest point of the roof.Where rainwater spills onto grade, the discharge point shall be 18 inches above grade and extend three ft. from the building. Splashpads to be provided and grade should slope away from the building.Roof penetrations should be kept a minimum of six ft. away from any roof drain or low point or valley, and should not restrict flow to a drain or scupper.Water on the roof shall not run more than 35 ft. to a drain Water on the roof shall not run more than 20 ft. to a drainor scupper. or scupper.Any roof openings other than drains must be minimum 14 inches above the finished roof surface.Scuppers or drains should be corrosion resistant and compatible with adjacent materialsTABLE 8: FIELD REVIEW REQUIREMENTSSILVER GOLDIndependent Inspector shall be engaged for 25 per cent ofIndependent Inspector shall be engaged for 100 per cent of the days of work, which shall occur on the days when majorthe days of work. RRO or equivalent. stages are achieved. RRO or equivalent.NOWHIRING!P: 250-492-7985F: 250-492-7781E: team@interiorroong.comwww.interiorroong.comwww.rcabc.orgl23'