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Plans } OFFICE COPY LIABILITY The City of Tigard and its employees shall not be responsible for discrepancies which may appear herein. VALIDITY OF PERMIT THE ISSUANCE OF A PERMIT BASED ON CONSTRUCTION Address shall be posted DOCUMENTS AND OTHER and Visible from street. DATA SHALL NOT PREVENT THE CODE OFFICIAL FROM REQUIRING THE CORRECTION OF ERRORS. ORSC 105.4 Final inspection approval is required prior to occupancy. Approved plans cha.!! be on lob s!!2. CITY OF TIGARD REVIEWED FOR,CODE COMPLIANCEApproved* ' t OTC: ( J Permit#: ty $12o2O — 06234 Address: `- 0\t5 3 SW Prly-f Suite#: 131 >: Date: $/17/ZD?-fl 1 r All GA file no.'s are from the 2009 edition. OFFICE COPY 2" x 6" interior walls: GA file no. WP3660 (load bearing) will be followed for 1. between the kitchen and laundry/closet 2. between the bedroom and living area or fireplace/chimney and 3. between the laundry/closet and fireplace/chimney. Since the bottom plate sits on a 6.5" tall concrete foundation wall, a 'IA" bead of fire-rated construction adhesive will be applied at 2" from the bottom and sides to adhere it to the concrete (where nails cannot be used). Where the 2x6 wall in the bedroom meets the back side of the original cement block fireplace there is a gap that extends up to the second level. To fireblock this space according to R1003.19, sheet metal will span the 2-4" gap between the 2x6 wood framed wall and the back and side of the concrete block fireplace/chimney. Mineral wool will be placed on top of the sheet metal at no closer than 2" from the fireplace/chimney and a fire rated caulk will be used to seal the sheet metal to the concrete blocks (see images). GA FILE NO. WP 3660 GENERIC 1 HOUR FIRE GYPSUM WALLBOARD,WOOD STUDS One layer cis"type X gypsum wallboard applied at right angles to each side of 2 x 6 wood studs 16"o.c.with 2'!4"Type S or W drywall screws 7"o.c. Vertical joints staggered 16"o.c.,horizontal joints staggered 24"o.c.,on opposite sides. Tested at 5,156 lbs per stud or 100 percent of design load.(LOAD-BEARING) {, H Thickness: 6N4" Approx Weight: 8 psi \ )� Fire Test ITS J99-22441.2,10-99 V V Contact the manufacturer for more detailed information on proprietary products. Fire-rated caulk Mineral wool with 2" gap to y( concrete blocks - :t::flg Concrete 2x6 block wall fireplace/ chimney 2"x6" and 2"x4" interior walls (non-load bearing) 1. shared walls with garage and 2. bathroom interior walls. The garage wall that backs the kitchen closet/pantry is 2x4. The garage wall that backs the laundry/closet and bathroom is 2x6 with an additional 2x4 wall built on the ADU side to run utilities and give more depth for insulation. Bays are filled with 3" rockwool insulation. The %" type X gypsum will be placed on the 2x4 walls per GA file no WP 3243 opposite side. Since the garage walls already have IA" sheetrock that will not be removed, an additional %" type X will be placed on top of the existing drywall with either green-glue or 1lb mass loaded vinyl sheets for additional sound protection. Otherwise the GA file no WP3243 will be followed. Garage side (build-up on existing ''/2 gypsum wallboard): GA FILE NO. WP 3360 GENERIC 1 HOUR 45 to 49 FSTC FIRE SOUND GYPSUM WALLBOARD,WOOD STUDS Base layer 3k"gypsum wallboard or gypsum veneer base applied parallel to each side of 2 x 4 wood studs 16"o.c.with 5d coated nails, 1314"long,0.082"shank.7/32"heads,12" o.c. Face layer s/e"type X gypsum wallboard or gypsum veneer base applied parallel to z f each side with 6" wide strips of lanunabng compound combed along edges and intermediate studs and 6d finish nails, 2"long, 0.0915" shank, 0.135" heads driven at 45°angle 24"o.c.at intermediate studs Joints staggered 16"o.c.each layer and side. (LOAD-BEARING) Thickness: 53/2" Approx. Weight B psf Fire Test: UC, 2-4-65 ��\ Field Sound Test:ACl 7-1152004a, 12-21-64 • ADU side: OPPOSITE SIDE: One layer 5/s"type X gypsum wallboar ura-veneer.basa)applied parallel or at right angles to studs with 6d cement coated nails, 171s"long,0.0915"shank, 15lsi' heads, T'o_c. Vertical joints staggered 16" on opposite sides. (LOAD-BEARING) Floor to Ceiling: GA file no. FC 5120 best matches our floor-ceiling structure except that 1. we have 2x12 wood joists, not 2x10 as listed here, 2. we will be using 3" rockwool insulation batts friction fit into the 16" o.c. bays in addition to 3" glass fiber insulation batts to completely fill the bays and 3. we will be installing 5/8" type X gypsum wallboard instead of We might also add llb MLV just to decrease the sound transmission further. The resilient channel and MLV is UL tested from Trademark SoundProofing (www.tmsoundproofing.com) and an image of the assembly is pasted below. GA FILE NO. FC 5120 GENERIC 1 HOUR 50 to 54 STC WOOD JOISTS,GYPSUM WALLBOARD,RESILIENT CHANNELS, FIRE SOUND GLASS FIBER INSULATION T_"7_ One layer 1/2 type X gypsum wallboard or gypsum veneer base applied at right angles to resilient furring channels 24"o.c.with 1"Type S drywall screws 8"o.c at ends and 12" .� o.c.at intermediate furring channels.Gypsum board end joints located midway between continuous channels and attached to additional pieces of channel 64'long with screws `' 8"o c Resilient furring channels applied at right angles to 2 x 10 wood joists 16"o_c - -. with 6d coaled nails, ltls' long, 0.085"shank, 114"heads, two per joist Wood joists supporting s/e'interior plywood with exterior glue subfioor and ale"particle board,1.5 psf. 31/f glass fiber insulation batts,0.7 pcf,friction fit in joist cavities supported alternately Approx.Ceiling every 12"by wire rods and resilient furring channels. Weight 2 psf Sound tested with carpet and pad and with insulation stapled to joists. Fire Test: FM FC-181,8-31-72 Sound Test G&H OC-3MT,10-13-71 IIC&Test (73C&P) G&H OC-3MT,10-13-71 Resilient ' '.----- -_-.---_---;-'( Trademark SOIJIlDPR00FIf1G Direct Fix to Wood Stud with 1 LB Mass Loaded Vinyl Construction: • 5/8" Gypsum Board - 1/8" 1 LB (LIL Listed) Mass Load Vinyl • 2"xL"Wood Stud, 24" OC R-19 Insulation, 5.5" Cavity, Fully Filled • RS1C-1 Clips, 68" OC ---- • Drywall Furring Channel, 24"DC ---.-- • 5/8" Gypsum Board Fire Rating: 1 Hour Exterior walls: Interior details from GA file no. WP8109 will be followed. The exterior is not within 10' of another structure and therefore only the interior side will be a 1 hour rated assembly (the exterior instructions will not be followed). Description of the structure of our exterior walls (image below): There is a 36" tall, 8" wide stem wall with a 2x6 top plate and then a 60" tall 2x4 wall sitting on top (double top plate). On the outside, there is plywood sheathing before the siding (1970s fiberboard/hardboard lap). On the interior there is a 2x3 non-structural wood framed wall sitting just inside the concrete stem wall separated by 6mm plastic for a moisture barrier. • This 2x3 wall continues from the concrete slab-on-grade subfloor up the full height to the ceiling. 23/32" plywood with 6" pieces covering the seams fill the gaps at the ceiling between the 2x3 and 2x4 exterior wall. 23/32" plywood or 2x6 horizontal bracing at 4' high ties the 2x4 and 2x3 walls together. At least every 10' horizontally, 23/32" plywood will be used to fireblock the upper gap between the 2x4 exterior wall and the 2x3 wall. 3" rockwool insulation is in the bays of the 2x4 exterior walls. 3" fiberglass batt insulation will be added to the 2x3 walls (stapled in). 5/8" fire-rated X gypsum will be applied per GA file no. WP8109 to the interior side of the 2x3 wall. GA FILE NO. WP 8109 PROPRIETARY' 1 HOUR FIRE GYPSUM PANEL PRODUCTS, FIBER-CEMENT SIDING,WOOD STUDS EXTERIOR SIDE: Base layer 5/s' proprietary type X gypsum sheathing or glass mat gypsum substrate applied parallel to 2 x 4 wood studs 16" o.c. with 15/4" galvanized ", roofing nails 4"o_c_at vertical joints and 7"o.c.at intermediate studs and top and bottom plates- Joints of gypsum sheathing may be left untreated- Face layer 1/e proprietary fiber-cement siding fastened through sheathing to studs. 3112 unfaced glass fiber fiction fit in stud space. INTERIOR SIDE: One layer 5/8"proprietary type X gypsum wallboard,glass mat gypsum Thickness: 51/8" substrate, water-resistant gypsum backing board, or gypsum veneer base applied Approx. Weight: 9 psf parallel or at right angles to studs with 6d coated nails, 17/s" long, 0.0915"shank, lie Fire Test: See WP 3510 heads, 7"o.c.(LOAD BEARING) (UL R3501-47,-48,9-17-65, PROPRIETARY GYPSUM PANEL PRODUCTS UL Design 29 UL R-7319-129, 7-22-70, American Gypsum Company LLC - 5/s"FireBloc®Type X UL Design U314) 5/3"Exterior Sheathing Type X CertainTeed Gypsum Inc. - 5/a"ProRoc®Type X Gypsum Panels 5/s"GlasRoc®Sheathing Type X Gypsum Panels Georgia-Pacific Gypsum LLC - 5/8"DensAmror Plus®Fireguard® Interior Guard 5/s" DensGlass Gold®Fireguard® Lafarge North America Inc. - 5/a"Firecheck®Type X 5/8" Firecheck®Sheathing Type X National Gypsum Company - 5/s"Gold Bond®Brand FIRE-SHIELD® Gypsum Board - 5/s'Gold Bond®Brand FIRE-SHIELD® Gypsum Sheathing PABCO Gypsum - 5/8'FLAME CURB®Type X - 5/0"Exterior Gypsum Sheathing Type X Temple-Inland - 5/3"Type X 5/8"Type X Sheathing 23/32" plywood with backed seams. Fitted tightly against both top-plates. 2x4 wall with a / double top plate 2x3 wall with rockwool insulation and vertical blocking 23/32" plywood or type X fire-rated gypsum to fill gap between walls every 10', evenly spaced along each wall. 2x6 topped with a 2x4 double bottom plate %" type X gysum 8" Concrete Zig foundation stem wall Concrete slab-on-grade subfloor irimmTh "- Rockwool insulation friction fit in 2x3 walls with � studs a maximum of 16" o.c. Penetrations/unusual spaces: Any electrical boxes will be steel or other 1-hr fire-rated approved material with a gap no larger than ''Vs" from the wall. Any boxes on the opposite side of the same wall will be separated by at least 24" and fire blocked using 2" nominal lumber and rockwool insulation friction fitted and/or stapled in the bay. Electrical panels or wall heaters will be fire blocked using 2" nominal lumber within 24". Any gaps (less than created by cables or telephone wires penetrating the assembly will be sealed evenly with 1-hr fire-rated caulking. Any gaps between '/2" and 1" will be evenly filled with 1-hr fire-rated foam. The dryer vent ducting penetrating through the ADU wall into the garage will be made from 26 gage sheet metal and will not open into the garage space. The %" gap between the wall and the ducting will be sealed with 1-hr fire-rated caulking. The ducting will run along the garage wall, secured by metal strapping, and vent through the exterior wall of the garage, adhering to a '/e" gap between the wall and sealed with the same fire-rated caulking. Under stairs space is accessible and so will have walls and soffits of%" X-rated gypsum. Recessed lighting above the kitchen will maintain the 1-hr fire-rated assembly with a 1-hr fire-rated approved protective box, as installed by the electrician. The bathroom exhaust fan/light ducting/vent (Air King LEDAK8OH) and microwave exhaust ducting/vent will penetrate the membrane, but will have blocking on the non-vented side with 2" nominal lumber and the joist cavity will be lined with X rated gypsum to the exterior wall. Any joints in the gypsum will be sealed with 1/2" bead of fire-rated caulking. The ceiling X-rated gypsum on the ceiling will be within 1/2" of the box and sealed with a fire-rated caulking. Mineral wool will be fit around the duct in the joist bay. OFFICE COPY RECEIVED JUL 2 0 202(} Narrative that demonstrates how the proposal meets all applicable approval criteria,: .. F TIUARD regulations, and development standards. Also functions as a description of the pERlq51 DIVISION complement scaled drawings. Applicant: Gail Kent Number of units: 1 Type of unit: Internal Size: 576 sf according to City of Tigard (total of home is just over 1,700sf) Height: N/A (Internal ) Setbacks: N/A (Internal) Entrance: The door is on the east side of the house, 90 degrees from Murdock St. This is on the same side as the front door to the home. A path will extend from the parking area to the front door with a pad at least 36" * 36" at the front door (at minimum equal to the width of the door) within 1.5 vertical inches from the threshold and even with the outside grade and approaching pathway and the interior flooring. Exterior door will be covered from the elements by the current 6 foot overhang already on the top level of the house and nothing will encroach upon the 3 foot square exterior or interior landing within 8 vertical feet. Parking: There will be at least one off-street parking spot provided for the ADU on asphalt and additional parking on gravel, still off-street. Building Permit: An ADU building permit with additional mechanical, electrical, plumbing permits will be requested to accomplish the work as laid out in the plans. Scaled Site Plan with existing home and driveway showing the location of ADU within the home is provided. (3/16" = 1') 3(s " Scaled Floor Plan ()= 1' scale): 1. Dimensions shown on plans 2. Rooms identified on plans 3. Existing entry door (36" x 80") and window types and sizes (all vinyl, double pane, Cascade windows, 36" high, horizontal sliding with screens; width shown in plans) 4. Locations of carbon monoxide/smoke detectors shown in plans. Will be hard-wired by the electrician. 5. Existing walls shown, no new walls planned 6. Ceiling height is 96" in all spaces. 7. Thermal insulation: the space was already heated and insulated. The existing insulation will not change. Current wall insulation is 3" R-13 rockwool in the wall cavities. We will add rigid foam board at an R-value of 5-7.5 to the concrete stem walls (3' tall). Ceiling cavities will be filled with 2" rockwool batts to reduce sound transmission and fiberglass insulation batts at$ E IR-13 for additional heat insulation. 8. Key: Anything colored in green on the floor plans will be new to the space and anything purple will be modified/moved. If a color change was not able to be applied, a note will be made on the plans with these details. Due to this being an internal ADU and that the mechanical support structure will not change (roof, walls, etc.) I confirmed with the City that we do not need elevation drawings, roof slope, joist cross-sections, etc. Dwelling Unit Separation. Dwelling units will be separated by a 1-hour fire resistant rated assembly (vertical and horizontal); horizontal assemblies will be supported by 1-hour fire resistant rated construction. The only openings in the support walls to the first level of the main residence will be the exterior door and vinyl double-pane windows. The current garage door, which is 1 %" thick solid wood and not hollow, will remain in place. The ADU has a separate exterior entrance. We will be hiring electrical and plumbing contractors who will be able to follow the 1-hour fire rated assembly special requirements per the Oregon Residential Specialty Code. The floor-ceiling assembly will also have an aire-borne sound transmission class rating of 45 when tested in accordance with ASTM E90 and impact insulation class (IIC) rating of not less than 45 when tested in accordance with ASTM E492. Room Sizes: The living room and bedroom will have a floor area of not less than 70 square feet, and shall not be less than 7 feet in any horizontal dimension. Ceiling Heights: All habitable rooms will have a ceiling height of at least 7 feet. Most rooms will be 8 feet. Light and Ventilation. All habitable rooms shall have glazed openings of not less than eight percent of the room's floor area, and a minimum openable area to the exterior of four percent of the room's floor area. The living room has glazed openings of 27.8 square feet. With the total living room at 154.5 square feet, this amounts to 18%. The openable area in the living room for just the windows is 11.77 square feet, which is 7.6%. The bedroom has 16.63 square feet of glazed openings in a total area of 153.5 square feet, amounting to 10.8%. The openable area in the bedroom is 7.11 square feet in 153.5 square foot room, which is 4.6%. Emergency Egress. The bedroom has a window that opens directly to the exterior without any key or special knowledge. It stands at 48 inches high now and so will be moved down to 44 inches high to be in line with egress regulations. The egress openings in both the bedroom and the living room are 7.1 square feet each, with an egress clear opening of 32 inches by 32 inches. There is the additional egress door in the living room. Doors. The ADU has a side-hinged exit door that is 36" wide and 6'8" high. Next to the door is a 48" wide window. Smoke and Carbon Monoxide Alarms. The ADU and primary dwelling unit shall be equipped with hard wired smoke/carbon monoxide alarms. '. . Energy Conservation. The basement space was previously heated, so the SBC energy efficiency requirements do not apply. The exit door and one front window will meet the SBC energy efficiency requirements. The ceiling will have avil5gteinsulation added and the framed walls R-13t.R t. re rnu i r . Electrical Systems. The ADU will have access to the electrical service panel in the laundry room. The electrical work will be performed by a licensed electrical contractor. Electrical to be modified will include the addition of an electrical panel in the laundry/utility space that will control the ADU unit so as to be accessible to the ADU resident and have a 30" minimum clear space for access. In addition to the panel, new electrical outlets will be installed to adhere to code and run new appliances in the kitchen (fridge/freezer, range, microwave/exhaust hood, and dishwasher, wall plugs, and lighting), new electrical will be run to the north wall to accommodate the new ductless heat pump (living room), new electrical will be run to the bathroom and bedroom for wall heaters, and new electrical will be run to the current fireplace to install an electric fireplace insert (with heat, ventless). Heating/Cooling Systems. The ADU will have a separate heating/cooling system with separate climate controls with no ducting. A heating system will be installed that will keep habitable areas at or above 68 degrees fahrenheit (ductless heat pump and wall heaters). Plumbing Systems. The ADU and primary dwelling unit will be served by a common potable water and sanitary sewer system. The ADU will have access to a plumbing shut off(bedroom closet next to water heater), and a 3-inch sanitary building drain (cleanout exists in the garage (west side of ADU-to-garage door and one will be place at the end of the line under the bathroom sink). The sewer will only serve two water closets total (1 main residence, 1 ADU) and those were already functioning. Plumbing work will be performed by a licensed plumbing contractor. The additional plumbing fixtures do not require upsizing of the water meter. The worksheet from the City Utility Billing Division was completed for water meter information. Plumbing to be added will include the addition of a sink with attached dishwasher and disposal for the kitchen and a new exterior hose bib. Address: 10153 SW Murdock Street, Tigard, OR 97224 (new, approved, recorded with Washington County) Landscaping: A yard already exists outside of the unit and will be used by any renters.