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Plans .44 5T76v6 -/ev r p FC � Re: Alternative Crawl Space Ventilation for Gabriel Woods subdivision �� •.. � << .�. MAR Attn: Mark C U LD2? G D +'ViSt^N Due to the foundation vent limitations on the interior units here at Gabriel Woods not allowing us to provide the adequate amount of crawl venting we have had Roth Heating and Cooling provide Humidistat fans for these crawl spaces. By using a 6" 150 CFM placed in the crawl with 6" ducting running from the foundation vents in the back to the front crawl space, this 150 CFM fan will replace the 1950 Cubic feet of air space 4.6 times an hour and will be able to pull air from all areas of the crawl space. The fan is also wired with a humidistat sensor that will gauge the humidity of the crawl space and function as needed. We have also provided the fan with a troubleshooting line that runs to the ga- rage where a red sensor light will turn on if ever needed to indicate that the fan is not functioning prop- erly. The following are the Lot numbers, Addresses and Permit numbers for all homes that require this me- chanical Ventilation: 'Lot 2: 13865 SW Anna Ct. MST 2006- 100444- Tligarol Lot 3: 13852 SW Anna Ct. MST 2006 - 10045x' Lot 6: 13819 SW Anna Ct. MST 2006 -10048 4 Lot 7: 13807 SW Anna Ct. MST 2006-100494- - - FT ti Lot 12: 13804 SW Anna Ct: MST 2006- 10052 / Lot 13: 13814 SW Anna Ct. MST 2006 - 10053'x' Lot 14: 13826 SW Anna Ct. MST 2006 - 10054 A V Lot 17: 11472 SW Lomax Terr. MST 2006- 10057k" Lot 18: 11480 SW Lomax Terr. MST 2006 -10058 } Lot 19: 11488 SW Lomax Ten. MST 2006 - 10059 Lot 22: 11489 SW Rebecca Ten. MST 2006 - 10062+ Lot 23: 11481 SW Rebecca Ten. MST 2006- 10063F Lot 24: 11475 SW Rebecca Ten. MST 2006-10064f Thank you, Brad Miller Project Manager INTEX Custom Homes • ROTH Kory MacGregor HEATING & COOLING 'esld•rr Craw] Ventilation for Gabriel Woods 1950 cubic ft. air space in crawl 150 cfrn fan with humidistat will change out air in crawl 4.6— times an hour crawl ventilation provided by Roth Heating and Cooling M2d<-. MAR I � � Cl ry 2007 el 14 City of Tigard r( ti Flans Pate 3.151a7 • 0 • Cor orate Hcaequaners • P.U. Box 7F: • 6.94C 5 Anderson Road Canby, 9 %0+3 o�. 503.766.: 2eS • F a. 503 2.36.3474 • CO3 14003 Centre, Oregon Branch. 2939 AN H.e, De >ert D :ive- Prm._vil'e. Oie3on 977 i4 Mobile :a: 945.1513 c o tE.0 ^OL :2665; ww�w.roth�ho:K. con 09/21/2006 16:16 5P ^972093 CUSTOM BIZ SOLUTIONS PAGE 01/0 `` , , c Noun roil SEP 2 1 RE� PACIFIC NORTHWEST ENGINEERING, INC. September 07, 2006 City of Tigard Building Dept. Re: Gabriel _Woods . SW #22 Dear Sirs, I have reviewed the design criteria for the above named project with regards to the change in SW # 22. Enclosed are the new calculations for SW # 22. SW # 22 is 12.33 ft. long. The force on this wall is 2,132 lb making the shear (force/length) 173 plf (pounds per lineal foot) and having a hold -down requirement of only 185 lbs. Under these conditions it was within the parameters to use 1 /z" drywall (on both sides of the wall) with 6d nailing @ 4" / 8" O.C. on the edges and in the field respectively, with only 16d nails @ 12" O.C. in the bottom plate to hold down the wall. Due to the fact that the drywall was not installed as per requirement, there are two options that would not require shortening the shear -wall. (Shortening the shear -wall would then significantly change the shear value and the hold -down requirement) The first option would be to sheet both sides of the bathroom/laundry room wall with one layer of 1 /2" drywall and one side of the master closet with 2 layers of 1 /2" drywall. The bathroom/laundry room uses 6d nails with 4" and 8" spacing at the edge and field respectively. The master closet, however requires 7d nails at the same (4" and 8") spacing. The second option would require one side of the wall (on the laundry room/ master closet side - full length) to be sheeted with 7/16" O.S.B. This would be nailed with 8d nails at 6" and 12" spacing on the edge and in the field respectively. �, *p PRp�� If you have any questions please feel free in calling me. CD N G 1 N SA Thank Y , — . . ' ip I • ■ . ■ A •. , ORE o' ,. k El lingson,'i' E. 'i �'{ Y \db a President .. i 6 . • <-1' cmvon o.DARR nrnaxo.nx 5 E : , \j EXP. .2 -07 4242 Silver Falls Dr. N., Silverton, OR. 97381 ph # (503) 873 -3184 fax # (503) 873 -3907 P.E. # 13,676 09/21/2006 16:16 5035972093 CUSTOM BIZ SOLUTIONS PAGE 02/02 HOLDDOWNS HOLDDOWN EQUATION: T= (v) (h) (L) — (L) (0.5) (L.09,) (w) (reduction) -. (L) (0.5) (h) (w,, (# stories) L SHEARWALLS SW22 unit shear, v 173 lb/lineal foot wall height, h 8 feet length, L ... 12.33 feet joist width, Lmb 38 feet load from joists above, w 10 psf wall weight, w,,� 8.4 psf controlling load (reduction) wind it stories 1 REQ'D HOLDDOWN, T= 185 lb SHEARWALL SCHEDULE NAILING ` HOLD -DOWNS ANCHOR LENGTH POST NOT SW # SHEETING -- EDGE/FIELD (SIMPSON) (FEET) 22 1/2" DRYWALL 6d 4"18" 16d NAILS @ 12" O.C. ' 12.33 1 - 2X NOTE "A" NOTE A: MUST SHEET ONE SIDE (MASTER CLOSET) WITH 2 LAYERS OF DRYWALL AND BOTH SIDES OF THE BATHROOM/LAUNDRY ROOM WALL(SEE DETAILED LETTER) OR SHEARWALL. SCHEDULE NAILING HOLD -DOWNS ANCHOR LENGTH POST NOTES SW* SHEETING EDGE/FIELD ( SIMPSON) (FEET) 22 7/16" O.S.B 8d 6" / 12" 16d NAILS © 12" O.C. 12.33 1 - 2X NOTE "A" NOTE A: MUST SHEET ONE SIDE (FULL LENGTH) WITH 1 LAYER OF O.S.B. intex -5plex.xis.xls Kory MacGregor ROTH President g HEATING & COOLING Ventilation for any unit with inadequate ventilation Roth Heating and Cooling will install a 200 CFM fan which will ventilate the crawl space. The crawl space is approximately 1,100 cubic ft. divided by 200 cubic feet per minute. This fan will change the air out 10 times an hour. - 1 1 4 i' 1 big's 616 4 6,,arL Y11/1 — Cam, & �z •. . Corporate Headquarters • P.O. Box 1265 •6990 5. Anderson Road • Canby, Oregon 97013 Ph. 503.266.1249 • Fax: 503.266.3478 - CC34 14008 www.roth- heat.corn