HomeMy WebLinkAbout2818-Portland-MZ-Base-EL-CR201-A3-CR201 2RS.1RIGHT
2818.300
ATTIC VENT SCHEDULE
CR2012-CAR REAR ENTRY ROOFAREA 'A'ROOFAREA 'B'ROOFAREA 'C'
ATTIC AREA (SF)1359 498
TOTAL NET FREEVENTED AREA REQ.652 IN2 239 IN2
LOW - REQUIRED (*)326 IN2 120 IN2
LOW - ACTUAL w/EAVE VENTS (**)
336 IN2
12 EAVEVENTS
140 IN2
5 EAVEVENTS
LOW - ACTUAL w/CONTINUOUSVENTED SOFFITS (**)
330 IN2
33 LINEARFEET
120 IN2
12 LINEARFEET
HIGH - REQUIRED (*)326 IN2 120 IN2
HIGH - ACTUAL w/
POT VENTS (***)336 IN2
6 VENTS 122 IN2
2 VENTS
HIGH - ACTUAL w/CONT. RIDGE VENTS(***)
342 IN2
19 LF 126 IN2
7 LF
* REQUIRED NET FREE VENTED AREA IS CALCULATED BY MULTIPLYINGTHE ATTIC AREA (FT2) BY 1/300 AND THEN MULTIPLYING BY 144
(CONVERTING FT2 TO IN2). 50% OF TOTAL NET FREE VENTED AREA ISREQUIRED NEAR THE RIDGE (HIGH) AND 50% IS REQUIRED AT THE SOFFIT(LOW). WHEN BOTH (HIGH) & (LOW) AREN'T PROVIDED, THE REQ'D NET
FREE AREA IS 1/150 OF THE ACTUAL AREA INSTEAD.
** ACTUAL NET FREE VENTED SOFFIT AREA IS CALCULATED BY DIVIDINGTHE REQUIRED (LOW) AREA BY THE MFRS STATED ACTUAL VENTED NETFREE AREA PER VENT: LOW OPT 1: EAVE VENTS = 28.0 IN2/VENT (OR) LOW OPT 2: CONT. VENTED SOFFITS = 10.0 IN2/LINEAR FT
*** ACTUAL NET FREE VENTED RIDGE AREA IS CALCULATED BY DIVIDINGTHE REQUIRED (HIGH) AREA BY THE MFRS STATED ACTUAL VENTED NETAREA PER VENT: HIGH OPT 1: POT ROOF VENTS = 61.0 IN2/VENT (OR) HIGH OPT 2: CONT. RIDGE VENTS = 18.0 IN2/LINEAR FT
~ 24' - 6 3/4''
CRAFTSMAN 201
Roof Shingles, per spec
6" Fasia Board, per spec
6" Rake Board, per spec
Roof Shingles, per spec
6" Fasia Board, per spec 6" Rake Board, per spec
3060 3060
4020
3053
6" Fasia Board, per spec
6" Rake Board, per spec
Roof Shingles, per spec
3060
2040
3060
30533053
3060 3060
3053
3053
3053
3060306030603060
3053 3053305330533053
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