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ATTIC VENTILATION CALCULATIONS <br />SEE SHEET A226A <br />ROOF NOTES <br />Q <br />M <br />M <br />M <br />1p <br />ao <br />0 <br />N <br />0 <br />N <br />N <br />L: <br />X <br />(1) <br />co <br />I <br />z <br />I <br />U <br />U <br />I <br />L <br />E <br />O <br />U <br />L <br />0 <br />LL <br />I` <br />N <br />00 <br />U <br />O <br />0 <br />X <br />a) <br />g <br />L <br />U <br />A <br />w <br />Q <br />z <br />w <br />J <br />U_ <br />I <br />A321 <br />B.b B.c 1 B.d <br />.I <br />O <br />0 <br />IDS <br />B.1 IDS <br />I <br />I <br />I <br />2'-0" <br />O.H. i w <br />O <br />04 <br />I � <br />I <br />I <br />I I <br />I <br />I <br />I <br />Y I <br />Q <br />Q I <br />U I <br />I � <br />wz <br />I <br />U H I <br />�r U- I� <br />I` <br />2'-0" LLL <br />O.H. IDS RIDGE RIDGE VENT I O0 <br />zz II <br />N04 <br />~ <br />I w � <br />o <br />W J I \ <br />QU I <br />2 <br />A423 RIDGE — JP� — — U w— <br />Qw I <br />= U I <br />I <br />I <br />I <br />IDS <br />I <br />W <br />I I <br />2-HOUR STAIR ENCLOSURE <br />FRAMING CONTINUOUS TO--------------T <br />UNDERSIDE OF ROOF SHEATHING. I <br />STAIR ENCLOSURE ROOF FRAMING <br />TO BE ENTIRELY INDEPENDENT OF <br />MAIN ROOF FRAMING <br />HOOD FOR STAIRWELL <br />PRESSURIZATION FAN <br />I <br />4 1 /4" / 12" <br />2'-0" I <br />I I <br />O.H. <br />RIDGE <br />I <br />N I II <br />II <br />I I <br />RIDGE VENT I L <br />I <br />I <br />IDS <br />� I <br />1'-6" JP <br />A322 1 O.H. <br />I I <br />I <br />I i\ <br />I <br />I I <br />I <br />I <br />I <br />I <br />I I <br />I <br />i <br />I <br />B.e B.f B.g <br />I <br />IDS <br />COMPOSITION SHINGLE ROOFING <br />JP 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 />RIDGE VENT CDS <br />c\j N <br />L � <br />I <br />I <br />I <br />J <br />I <br />I �t <br />I <br />RIDGE VENT <br />4 1 /4" / 12" <br />II � <br />I I N <br />I I <br />� I <br />I �t <br />I � <br />y� `r <br />I <br />I <br />I I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />-------------------------------- <br />I <br />I <br />I <br />I <br />I <br />I <br />I I <br />I <br />I <br />I <br />I <br />I <br />1'-0"O.H. <br />TYP. <br />I I <br />B.b B.c B.d B.e B.f <br />1 1 <br />A420 A421 <br />DGE % <br />VE• <br />NT CAP FOR TOP <br />j/ FLOOR UNITS, TYP.' <br />IDS 2' - 0" <br />O.H. <br />1'-6" <br />O.H. <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 />1 A323 <br />IDS — B 2 <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 THUR WILLIAM WASHINGTON <br />STAMP <br />Q <br />z <br />� <br />0 <br />m <br />U) <br />0 <br />2E <br />LULU <br />w; <br />0 <br />LU <br />< <br />CO <br />o <br />0 <br />c <br />a <br />N <br />d <br />0 <br />d <br />R <br />0 <br />d <br />t <br />M <br />O <br />Q� <br />N <br />00 <br />N O <br />V / <br />L <br />�Q <br />A+ <br />W <br />> <br />O <br />w' ai <br />N L <br />L <br />> <br />0 <br />ao w <br />z <br />0 <br />U <br />00 <br />J J co O <br />L <br />a 2 :5 < <br />o <br />Q <br />Q <br />w "0w z ai <br />_ <br />ow z " (1) <br />Ol- <br />co <br />im1L <br />i <br />2, - 0„ <br />O.H. <br />PROJECT #: 1827 <br />RIDGE <br />DRAWN BY: AT <br />B g CHECKED BY: ST <br />BLDG B - ROOF PLAN <br />NORTH <br />�n A226C <br />PERMIT SET 10/09/2020 <br />BLDG B - LEVEL ROOF NORTH <br />1/8" = 1'-0" <br />(p <br />BUILDING B <br />