| EXCEPTIONS: |
1. Vertical glazing located on the display side of the street level story of a retail occupancy provided the glazing |
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a. Is double-glazed with a minimum 1/2 inch airspace and with a low-e coating having a maximum emittance of e-0.40
or has an area weighted U-factor of 0.60 or less. (When this exception is used, there are no SHGC requirements) and, |
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b. Does not exceed 75 percent of the gross exterior wall area of the display side of the street level story. However, if
the display side of the street level story exceeds 20 feet in height, then this exception may only be used for the first
20 feet of that story. |
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When this exception is utilized, separate calculations shall be performed for these sections of the building envelope and
these values shall not be averaged with any others for compliance purposes. The 75 percent area may be exceeded on
the street level, if the additional glass area is provided from allowances from other areas of the building. |
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2. Single glazing for ornamental, security, or architectural purposes shall be included in the percentage of the total
glazing area, U-factor calculation and SHGC as allowed in the Tables 13-1 or 13-2. The maximum area allowed for the
total of all single glazing is one percent of the gross exterior wall floor area.
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