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ATTIC VENTILATION CALCULATIONS <br />SEE SHEET A236A <br />ROOF NOTES <br />Q <br />L0 <br />N <br />ti <br />O <br />O <br />N <br />O <br />N <br />N <br />L: <br />X <br />a� <br />co <br />I <br />Z <br />I <br />VI <br />L <br />E <br />O <br />U <br />0 <br />LL <br />I` <br />N <br />00 <br />U <br />U <br />E <br />U <br />O <br />0 <br />X <br />U <br />g <br />U <br />L <br />A <br />C.5 — <br />C.10� — <br />2'-0" <br />O.H. <br />o = <br />O <br />IDS <br />IDS <br />C.a <br />IDS <br />IDS <br />C.a <br />Oa <br />o <br />o= <br />I NO <br />o = <br />i�I O I i <br />IDS <br />I <br />I <br />IM <br />w <br />I <br />II <br />IM <br />I <br />I� <br />I <br />I <br />II <br />I <br />I <br />I <br />I <br />I <br />IIII <br />11� <br />i1w <br />VENT CAP FOR TOP <br />I <br />FLOOR UNITS, TYP. <br />i1 <br />lil <br />I <br />-------1---------s=====z---------------- <br />I <br />i11 <br />I <br />IIII <br />, <br />--------------------t---------Z=====----- <br />I <br />I I <br />I <br />I <br />N = <br />N01 <br />1 <br />6" PREFINISHED ALUMINUM <br />K-STYLE GUTTERS <br />C.g C.j <br />HOOD FOR STAIRWELL <br />PRESSURIZATION FAN <br />I IDS <br />2-HOUR STAIR ENCLOSURE FRAMING I I I <br />CONTINUOUS TO UNDERSIDE OF ROOF = <br />SHEATHING. STAIR ENCLOSURE ROOF <br />FRAMING TO BE ENTIRELY - I CD <br />- O <br />INDEPENDENT OF MAIN ROOF FRAMING c� rA331 _ CD I I I I <br />N I CV 04 I <br />O 1 <br />NO 1 NO I I I I <br />DS I 1 <br />0 I <br />I <br />DS IDS IDS I I <br />I I <br />loll L L iii L I <br />I 9 w ��' n 9 w ��' III 1��� <br />I I <br />WI I I 2 <br />I�il ii1 Ili $I A431 I <br />I�i1 ii1 I Ili <br />�i1 ii1 I Ili 11 �I <br />�Oil ii1 I ill I oil <br />I'll Ili Ihy �i� I I I <br />i iii I IIII I i1 <br />r-------� 1I 1 11 IIII III III I <br />oil I11 I 1111 IIIII I I I <br />11 I11 I111 1j1 I I I I <br />11 I11 I111 111 I I <br />HATCH INDICATES EXTENT OF ATTIC ACCESS CATWALK <br />11 SEE ELECTRICAL DRAWINGS FOR LIGHTING I111 111 I F� <br />3= 11 I111 I111 IIII I <br />II I111 I111 111 I I I <br />II 11j1 I I111 111 I I I <br />11 I111 I111 IIII II I <br />II �� � I111 � I111 � JUL 111I � � Ii <br />LL---------�=====2----RIDGE \---\\�\\\--- =C \\ JL�----- ----r \=��—C\����\\--------------- JUL -------- �=====zy�\\\^C�\--- RIDG�`\—��\\\\\\\l\������\\\�\\\\� <br />— -----��r----------Z=====s-------------------------- ----------- LL- <br />w <br />1j I111 <br />II i1 Ilil <br />11 11 I111 <br />I <br />111 IIII <br />I1 1j I111 <br />Ilrr Ilrr <br />III, III <br />IIII I11 <br />IIII 111 <br />Ii11 III <br />IIII L-9 iii <br />w <br />� III III <br />W' <br />I I <br />Iji Ili <br />W <br />I I <br />C� <br />Ili Ili ��� 0 <br />Ij1 III Q� � <br />r_1 i11 J <br />L <br />CD <br />a <br />OPENINGS <br />ROOF SHEATHING TO ALLOW <br />VENTING OF OVERFRAMED AREAS <br />• 1 <br />IDS <br />COMPOSITION SHINGLE ROOFING TO <br />MEET ASTM D7158 CLASS G OR H, OR <br />ASTM D3161 CLASS F ORVER ONE LAYER <br />OF UNDERLAYMENT, TYP. REFER TO <br />MANUFACTURER'S REQUIREMENTS <br />1 - - - - - - - - - - - - - - - - - - - - - - - - - - r - - - - - - - - -1 II - - - - - - - - - - - r- - - - - - - - - - - - - - - - - - - - <br />I <br />I111 III II \ <br />I111 I III I I I I I <br />I111 III I L <br />I I <br />I ii11 i1i i I I 22" X 36" 1-HOUR RATE \ <br />IIII 111 I l i ATTIC ACCESS HATCH <br />BASIS OF DESIGN - i \ <br />I IIII I I I I NYSTR M IU-22x36-G I\ <br />IIII i i I I ROOF ACCESS HATCH \ <br />11 i i i i FROM ATTIC WITH i <br />I IIII I I 11 PERMANENTLY I <br />1�1 i i i INSTALLED LADDER_ J <br />Iyl I I I r— — ---I <br />I iyi I I � I <br />iyi I I JP� <br />I Ij1 i i i i I <br />Ijl I I I I <br />L lyl I I I I I <br />II <br />----- --� `--------- —=I-------- <br />I <br />ICE & WATER SHIELD, TYP. <br />EXTEND 24" PAST FACE <br />OF EXTERIOR WALL I <br />SEE 12/XBE 6.00 TYP. <br />4 <br />A432 <br />IDS <br />c� <br />0 <br />IDS <br />IDS <br />C.j <br />C.5 <br />C.101 <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 />0 <br />�J) <br />Cie <br />o <br />a <br />H <br />w <br />0 <br />N <br />0 <br />W <br />Q <br />o <br />CO <br />p <br />o <br />a <br />N <br />d <br />0 <br />d <br />a <br />0 <br />d <br />0 <br />w <br />0 <br />a <br />LU <br />w <br />0 <br />r <br />z <br />a <br />z <br />0 <br />w <br />J) <br />0 <br />w <br />V/ <br />p <br />w <br />z <br />z <br />w <br />z <br />0 <br />z <br />�w <br />Q <br />w <br />Q= <br />L <br />Q� <br />�2C) <br />a? <br />E <br />C� <br />z <br />Q <br />M <br />�7 <br />w Cje <br />m <br />0 <br />� <br />F O <br />V/ <br />L <br />�Q <br />0 <br />A+ <br />W <br />> <br />Ill a� <br />o <br />< o <br />L <br />>LU <br />Q <br />0 <br />ao w <br />z <br />QUUo <br />a Q <br />L� <br />U <br />� <br />o <br />00 <br />J J (n o <br />wF <br />w <br />a 2 :5 < <br />z> <br />L <br />o <br />Q =� <br />wz <br />az <br />Q <br />WU <br />o� <br />W <br />z L o N <br />7 <br />LULU <br />LU <br />1 1 <br />w <br />O Ii ( pp <br />� a <br />PROJECT #: 1827 <br />DRAWN BY: AT <br />CHECKED BY: ST <br />BLDG C - ROOF WEST <br />II,,n A23bU <br />PERMIT SET 10/09/2020 <br />w <br />Q <br />z <br />w <br />J_ <br />LL <br />1 <br />BUILDING C <br />