Note: Modular furniture walls shall not be considered a permanent obstruction. EXCEPTION 1 to 130.1(d)1B&C&D: Areas adjacent to windows with opaque overhangs and no clerestory above the overhang, where the ratio of the Overhang Projection to the Window Head Height is greater than 1.0. EXCEPTION 2 to 130.1(d)1B&C&D: Upper windows installed to qualify for a PAF according to the requirements of Section 140.6(a)2L. SECTION 140.3 PRESCRIPTIVE REQUIREMENTS FOR BUILDING – ENVELOPES SECTION 140.6 PRESCRIPTIVE REQUIREMENTS FOR INDOOR – LIGHTING (a) Calculation of Actual Indoor Lighting Power. 2. Reduction of wattage through controls L. Daylit zones complying with the following requirements shall qualify for a PAF in Table 140.6-A. Horizontal slats on view windows The slat assembly, angles and spacing shall be permanently fixed and not normally removable by occupants or building personnel. Slats shall extend the width of the window and past both jambs as wide as their depth. Slats shall be opaque and free of openings. The area between the slats and the window shall be visually unobstructed. The thickness of the front edge of the slat shall be less than or equal to 0.25 times the slat spacing The slat width to spacing ratio (WSR) shall be calculated by dividing the slat width by the slat spacing. Slat angle shall be calculated by EQUATION 140.6-A. The WSR shall be greater than or equal to those provided in Table 140-A. For slats which are suspended from a horizontal overhang the overhang shall not cover the vertical fenestration and the front edge of the slat assembly shall vertically align with the front edge of the horizontal overhang. The suspended cutoff angle shall not be greater than the corresponding slat cutoff angle in Table 140.6-A. Daylight redirecting devices on upper windows Shall be approved by the CEC for use in meeting this requirement. The clerestory window onto which the device is mounted shall meet the requirements of section 140.6(a)2.L.v. Material which contacts metal exterior devices and exterior walls of conditioned or indirectly conditioned spaces shall have a minimum conductivity of TBD. The total area of such material in contact with the exterior wall shall not exceed TBD. Upper windows
Note: Modular furniture walls shall not be considered a permanent obstruction. EXCEPTION 1 to 130.1(d)1B&C&D: Areas adjacent to windows with opaque overhangs and no clerestory above the overhang, where the ratio of the Overhang Projection to the Window Head Height is greater than 1.0. EXCEPTION 2 to 130.1(d)1B&C&D: Upper windows installed to qualify for a PAF according to the requirements of Section 140.6(a)2L. SECTION 140.3 – PRESCRIPTIVE REQUIREMENTS FOR BUILDING ENVELOPES SECTION 140.6 – PRESCRIPTIVE REQUIREMENTS FOR INDOOR LIGHTING (a) Calculation of Actual Indoor Lighting Power. 2. Reduction of wattage through controls L. Daylit zones complying with the following requirements shall qualify for a PAF in Table 140.6-A. Horizontal slats on view windows The slat assembly, angles and spacing shall be permanently fixed and not normally removable by occupants or building personnel. Slats shall extend the width of the window and past both jambs as wide as their depth. Slats shall be opaque and free of openings. The area between the slats and the window shall be visually unobstructed. The thickness of the front edge of the slat shall be less than or equal to 0.25 times the slat spacing The slat width to spacing ratio (WSR) shall be calculated by dividing the slat width by the slat spacing. Slat angle shall be calculated by EQUATION 140.6-A. The WSR shall be greater than or equal to those provided in Table 140-A. For slats which are suspended from a horizontal overhang the overhang shall not cover the vertical fenestration and the front edge of the slat assembly shall vertically align with the front edge of the horizontal overhang. The suspended cutoff angle shall not be greater than the corresponding slat cutoff angle in Table 140.6-A. Daylight redirecting devices on upper windows Shall be approved by the CEC for use in meeting this requirement. The clerestory window onto which the device is mounted shall meet the requirements of section 140.6(a)2.L.v. Material which contacts metal exterior devices and exterior walls of conditioned or indirectly conditioned spaces shall have a minimum conductivity of TBD. The total area of such material in contact with the exterior wall shall not exceed TBD. Upper windows
2019T24-Draft-Code-Language-ADD.docx