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ATTIC VENTILATION CALCULATIONS <br />SEE SHEET A226A <br />ROOF NOTES <br />Q <br />N <br />1p <br />ao <br />0 <br />N <br />0 <br />N <br />N <br />L: <br />1'-6" <br />A322 1 O.H. <br />3 <br />A423 <br />X <br />a) <br />co <br />I <br />Z <br />I <br />U <br />I <br />U) <br />L <br />a) <br />L <br />O <br />U <br />L <br />O <br />LL <br />I` <br />N <br />00 <br />O <br />E <br />U <br />O <br />0 <br />X <br />O <br />g <br />U <br />L <br />A <br />w <br />Q <br />z <br />w <br />J_ <br />LL <br />M <br />1'- 0" O.H. <br />TYP. <br />IDS <br />IDS <br />IDS <br />B.b <br />B.b <br />N <br />1 <br />A420 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />L� <br />I <br />I <br />RIDGE VENT <br />N <br />I <br />�V <br />JP <br />A20 <br />B.c <br />I <br />4 <br />I <br />Y <br />I � <br />co <br />co <br />w <br />U <br />Q <br />U_ <br />I � <br />Q <br />O <br />z <br />I X <br />W <br />co <br />Q <br />U <br />0 <br />Z <br />I <br />� 2 <br />— <br />U <br />�I <br />N <br />� <br />I <br />�Y <br />RIDGE VENT <br />1 <br />A421 <br />B.d B.e <br />I <br />1 <br />B.f <br />B.g <br />1 A323 <br />wc <br />COMPOSITION SHINGLE ROOFING <br />TO MEET ASTM D7158 CLASS G OR <br />H, OR ASTM D3161 CLASS F ORVER <br />ONE LAYER OF UNDERLAYMENT, <br />TYP. REFER TO MANUFACTURER'S <br />REQUIREMENTS <br />VENT CAP FOR TOP <br />FLOOR UNITS, TYP. <br />ICE & WATER SHIELD, TYP. <br />EXTEND 24" PAST FACE <br />OF EXTERIOR WALL <br />SEE 12/XBE 6.00 TYP. <br />CUT 18" x 18" OPENINGS IN MAIN <br />ROOF SHEATHING TO ALLOW <br />VENTING OF OVERFRAMED AREAS <br />6" PREFINISHED ALUMINUM <br />K-STYLE GUTTERS <br />wc <br />1. SEE STRUCTURAL DRAWINGS <br />FOR ROOF FRAMING. <br />2. ALL ROOFING TO BE CLASS B <br />MINIMUM PER IBC SECTION 1505 AND <br />TABLE 1505.1. <br />3. ALL ROOF SLOPES ARE 4 1/8"/FT. U.N.O <br />4. ALL ROOF OVERHANGS ARE 1'-0" U.N.O <br />5. DRAFTSTOPS ARE NOT REQUIRED <br />IN BUILDINGS EQUIPPED WITH AUTOMATIC <br />SPRINKLER SYSTEMS PER IBC SECTION <br />903.3.1.1 (NFPA 13) <br />6. PER IBC SECTION 708.4, IN <br />COMBUSTIBLE CONSTRUCTION WHERE <br />THE FIRE PARTITIONS ARE NOT REQUIRED <br />TO BE CONTINUOUS TO THE SHEATHING, <br />DECK OR SLAB, THE SPACE BETWEEN THE <br />CEILING AND THE SHEATHING, DECK OR <br />SLAB ABOVE SHALL BE FIRE BLOCKED OR <br />DRAFTSTOPPED IN ACCORDANCE WITH IBC <br />SECTIONS 718.2 AND 718.3 AT THE <br />PARTITION LINE. EXCEPTION #6: <br />FIREBLOCKING OR DRAFTSTOPPING IS NOT <br />REQUIRED AT THE PARTITION LINE IN <br />BUILDINGS EQUIPPED WITH AN AUTOMATIC <br />SPRINKLER SYSTEM INSTALLED <br />THROUGHOUT IN ACCORDANCE WITH IBX <br />SECTION 903.3.1.1... PROVIDED THAT <br />AUTOMATIC SPRINKLERS ARE INSTALLED <br />IN COMBUSTIBLE FLOOR/CEILING AND <br />ROOF/CEILING SPACES. <br />7. DRAFTSTOPPING MATERIALS TO <br />BE 1/2" GYP. SHEATHING OR 1/2" PLYWOOD <br />OR OSB SHEATHING PER IBC SECTION <br />718.3.1. <br />8. PER IBC SECTION 1203.2 EXCEPTION: <br />THE NET FREE CROSS -VENTILATION AREA <br />SHALL BE PERMITTED TO BE REDUCED TO <br />1/300 PROVIDED BOTH OF THE FOLLOWING <br />CONDITIONS ARE MET: <br />1. IN CLIMATE ZONES 6, 7, AND 8, A CLASS I <br />OR II VAPOR RETARDER IS INSTALLED ON <br />THE WARM -IN -WINTER SIDE OF THE CEILING. <br />2. AT LEAST 40 PERCENT AND NOT MORE <br />THAN 50 PERCENT OF THE REQUIRED <br />VENTING AREA IS PROVIDED BY <br />VENTILATORS LOCATED IN THE UPPER <br />PORTION OF THE ATTIC OR RAFTER SPACE. <br />UPPER VENTILATORS SHALL BE LOCATED <br />NOT MORE THAN 3 FEET BELOW THE RIDGE <br />OR HIGHEST POINT OF THE SPACE, <br />MEASURED VERTICALLY, WITH THE BALANCE <br />OF THE VENTILATION PROVIDED BY EAVE OR <br />CORNICE VENTS. WHERE THE LOCATION OF <br />WALL OR ROOF FRAMING MEMBERS <br />CONFLICTS WITH THE INSTALLATION OF <br />UPPER VENTILATORS, INSTALLATION MORE <br />THAN 3 FEET BELOW THE RIDGE OR <br />HIGHEST POINT OF THE SPACE SHALL BE <br />PERMITTED. <br />9. BATHROOMS SHALL BE <br />MECHANICALLY VENTILATED IN <br />ACCORDANCE WITH THE IMC PER IBC <br />SECTION 1203.5.2.1. <br />KEY PLAN <br />OHNSON BRAUNDINC. <br />15200 52nd Ave. South <br />Suite 300 <br />Seattle, WA 98188 <br />Phone 206.766.8300 <br />www.johnsonbraund.com <br />ARCHITECTURE <br />INTERIOR DESIGN <br />Greg L. Allwine, <br />Jeffrey A. Williams, <br />8556 <br />REGISTERED <br />ARCHITECT <br />eFFREY �WILLIAM <br />STAMP <br />Q <br />z� <br />o <br />m <br />U) <br />U)� <br />LULU <br />LU <br />0 <br />Q <br />w <br /><Q <br />U <br />o <br />0 <br />c <br />0 <br />a <br />�L <br />N <br />d <br />0 <br />d <br />a <br />0 <br />d <br />U) <br />t <br />M <br />�o <br />Q� <br />N <br />N <br />�a) <br />a� rn <br />L <br />�Q <br />A+ <br />W <br />> <br />o <br />w> ai <br />N <br />L <br />� <br />> <br />� <br />0 <br />00 w <br />z <br />U O <br />U <br />J co a) <br />L <br />a 2 :5 < <br />00 <br />Q c <br />o <br />Q <br />w <br />w o Z <br />W <br />> <br />Z o (1) <br />11 <br />w <br />O LL (_5 m <br />0 <br />z <br />Y LU <br />�Q <br />w <br />Q= <br />Q� <br />�b <br />C z <br />C� <br />z <br />oQ <br />LL <br />m <br />� O <br />cj�z <br />0LL <br />Lo <br />Q <br />w <br />aQ <br />LULU � <br />�~ <br />LU <br />LU <br />(Dw <br />zw <br /><z <br />0~ <br />U) 0 <br />_� <br />PROJECT #: 1827 <br />B.c B.d B.e B.f B.g <br />DRAWN BY: AT <br />CHECKED BY: <br />ST <br />BLDG B - ROOF PLAN <br />MID <br />�n A226B <br />PERMIT SET 10/09/2020 <br />1 <br />BUILDING B <br />