Chapter 4

• GA 16 (1.6 mm) Minimum thickness of restaurant kitchen and other special-use sink, bonderized and galvanized sheet steel.
• 0.30 m Least dimension of access panel or utility for fixtures with concealed slip joint connections, provided for inspection and repair.
• GA 20 (0.8 mm) Minimum thickness of continuous waste and fixture tailpiece made of seamless drawn brass.
• 38 mm O.D. Minimum diameter of tailpiece, continuous waste or waste and overflow for sinks, dishwashers, laundry tubs, bathtubs, urinals and similar fixtures.
• 32 mm O.D. Minimum diameter of tailpiece, continuous waste or waste and overflow for lavatories, drinking fountains and similar small fixtures.
• 0.375 m Distance of water closet or bidet from its center to any side wall.
• 0.75 m Distance of water closet or bidet center to center.
• 0.30 m Distance of urinal from its center to any side wall.
• 0.60 m Distance of urinal center to center.
• 25.4 mm Minimum depth of finished shower dam, curb or threshold from the outside floor.
• 51 mm to 228 mm Depth of shower dam or threshold measured from the top of the dam or threshold to the top of the drain
• 2% to 4 % Slope of the finished floor of a shower receptor.
• 559 mm Minimum width of a shower door a threshold shall accommodate.
• 1.2 m Minimum distance between the door or entry to the drain opening.
• 0.6 sq. m. Minimum finished interior area of a shower compartment.
• 762 mm Minimum diameter of a circle capable of encompassing a shower compartment.
• 1.78 m Minimum area and dimensions of a shower compartment shall be maintained from a point above the shower drain outlet to a height of
• 76 mm For shower receptors built above the ground, at least above the top of the finished dam or threshold shall be first lined with sheet lead or copper or with other durable and watertight materials.
• 76 mm Minimum extension of all lining materials upward on the rough jambs of the shower opening above the top of the finished dam or threshold.
• 6.8 kg Standard grade of asphalt-impregnated roofing felt for metaling shower sub-pans or linings.
• 101 mm Extension of folds, laps and reinforcing webbing for shower lining or sub-pans in all directions from the corner of the webbing.
• 0.9 kg/mm Minimum tensile strength of mesh/ webbing for lining or sub-pan.
• 25.4mm Linings above the finished dam or threshold shall not be nailed or perforated.
• 2% Slope of gutters in public or gang shower rooms
• 4.9 m Maximum spacing of gutter drains in public or gang shower room.
• 48.88 °C Maximum temperature of limit stops for the delivery of hot water.
• 19.6kg/m2 Minimum weight of lead pans or liners.
• GA 24 (0.5 mm) Minimum thickness of copper pans or liners
• 1:5 Ratio of lavatory to number of persons in occupancy where there is exposure to skin contamination with poisonous, infectious, or irritating materials.
• 609.6 mm (24") Width of wash sink, when provided with water outlets, shall be considered equivalent to 1 lavatory.
• 457.2 mm (18") Diameter of a circular basin, when provided with water outlets, shall be considered equivalent to 1 lavatory.
• 1:50 Ratio of laundry tray to number of persons
• 1:100 Ratio of slop sink tray to number of persons
• 1:30 Ratio of water closet and urinal to number of persons
• 1.2 m Height above the floor of the urinal to be lined with non-absorbent materials.
• 0.6 m Distance on each side of the urinal to be lined with non-absorbent materials.
• 1:75 Ratio of drinking fountain to number of persons in public buildings.
• 150 On top of the first 75 persons, provide 1 additional drinking fountain for each persons thereafter.