H L) 'S <br />that is flatter than 5 feet (vertical) in 12 feet (horizontal), the shade point will be the <br />eave of the roof. If such a roof has a pitch that is 5 feet in 12 feet or steeper, the <br />shade point will be the peak of the roof. <br />SHADOW PATTERN. A graphic representation of an area that would be shaded by 22.6 <br />degrees and an azimuth ranging between 30 degrees east and west of true north- <br />south axis. <br />.SOLAR SETBACK. The shortest horizontal distance from the northern lot line to the <br />shade point. (See Figure 9.2795 Solar Setback Standards, See Figure 9.2795(2) <br />Shade Point Height (SPH) Measurement, Figure 9.2795(2)(a) R-1 Solar Setback <br />Calculation, and Figure 9.2795(2)(b) R-2 Solar Setback Calculation.) <br />EC 9.2795(2) - SOLAR SETBACK REQUIREMENTS. Buildings shall be setback from the northern <br />property line according to the standards in this section. An applicant for a <br />development permit for a building subject to this section shall submit verification on <br />a form approved by the city manager that shows either the solar setback or how the <br />structure qualifies for an exemption. If buildings on separate lots are attached or <br />connected at a common lot line, the solar setback standards apply as if the buildings <br />are a single building on a single lot composed of both lots. <br />EC 9.2795(2)(A) - SOLAR SETBACK FOR R-1 ZONE. <br />THE SOLAR SETBACK OF THE SHADE POINT SHALL BE GREATER THAN OR EQUAL TO THE <br />FOLLOWING FORMULA: <br />SSB = (2.5 x SPH) + (N/2) - 82.5 <br />WHERE: <br />SSB= SOLAR SETBACK (THE SHORTEST HORIZONTAL DISTANCE BETWEEN THE SHADE <br />POINT AND THE PLANE OF THE NORTHERN LOT LINE). <br />SPH= SHADE POINT HEIGHT (REDUCE THIS DIMENSION By 3 FEET IF THE SHADE POINT IS <br />RIDGELINE BETWEEN 45 DEGREES EAST OR WEST OF TRUE NORTH.) <br />N= NORTH-SOUTH LOT DIMENSION. MAXIMUM ALLOWABLE VALUE FOR] °N° FOR <br />PURPOSES OF CALCULATING THE SOLAR SETBACK SHALL BE 90 FEET. <br />Findings: The buildings that are closest to the North Property Line of the <br />project site are Buildings 1 & 2 on Drawing A1.1 of Site Plans (under <br />evaluation) 8/12/2013, and shall be used to calculate the required solar <br />setback. The part of the buildings that cast the longest shadow onto the <br />adjacent northern lot are the approximately 19'-6" tall northernmost <br />eaves, except for a total of two approximately 12'-2" wide dormer gables, <br />one per building, each with a ridge height of 23'-1", as measured directly <br />above finish grade. All proposed roof pitches have a rise-run ratio of 3:12 <br />Supplemental Info - Sept. 27, 2013 Page 2 of 9 Oakleigh Cohousing PDT 13-0001 <br />