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HomeMy WebLinkAboutPermit Building 2000-1-17 (2) >:" ~ '~ A/v1Bte~I/J8 - / li ~A'. ,.J lpsi .i:fl:;:~:: Engineering. Consulting. Testing January 17, 2000 Mr. Ron Sather , . City of Springfield Dept. of Public 'Works 225 North 5th Street , . Springfield, Oregon 97477 Subject: Arilbleside Meadows Subdivision 3l5IStreet, Springfield, Oregon PSI Project No. 722-90227 Dear Mr. Sather: ~' 0'\'\1213747.. C) '\ ' , ;S-7e ,,<b ' . ~ (0 ....&' ~ .:7 ~ ~ ,YJ' ~ \-) ~,~ ~ C'l %~ N \ ~ .5 ~o rt,~ C'6. :t~ ?eZL'Z91/:> As requested by Glenn Ling of Ling and Associates, we have completed a general geotechnical evaluation . of the subsurface soils for lots 81 to 172 of Ambleside Meadows Subdivision. The subject lots are anticipated to contain one or two stol)' single-family hoines. Home construction will typically consist of wood framed structures w.ith crawl spaces within the living areas and slabs on grade within the garages. EXIsting lot grading ranges from nearly level to slopes on the order of 15 percent and steeper. Generally, the 'grades become steeper at the south end of the project. ' , Our, scope of work included performing a limited subsurface exploration, laboratol)' testing and an engineering analysis. It should be noted that PSI's services have previously been retained to provide full time inspection of any structural fill placement occurring within the subject lots. Subsurface Exploration At the time .of our subsurface exploration, most of the site grading to prepare the lots for sale had been completed. The subsurface exploration, consisted of excavating 5 test pits within the house lots with a trackhoe and observing open trenches parallel and adjacent to streets. Locations of the test pits are indiCated on the Test Pit Location Map attached. Specific soil units encountered in the test pits are briefly discussed below. FilI- dark brown silty clay, moist to wet, organics, non-structural, observed some small cracks (generally less than 3/16" wide) when allowed todl)' indicating modera~e potential for shrink- swell. ' Siltv clav - dark brown to light brown to mottled orange, moist, soft to vel)' soft, organics, observed some small cracks (generally less than 3/16" wide) when allowed to dl)' indicating moderate potential for shrink-swell. Clav - light brown to light grey, moist, finn to soft, observed large cracks (up to approximately 1" wide) when allowed to dry indicating high potential for shrink-swell. Clavevsand - mottled orange to grey, moist, hard. Professional SelVice Industries. Inc.' 6032 N, ~utter Circle, Suite 480, PO, Box 17126' Portland, OR 97217' Phone 50-3;289.1778' Fax 5031289.1918 ~, ("';. , '~ PSI File No, 722-90227 January 17, 2000 2 The observed subsurface description is of a generalized nature to highlight major subsurface stratification features and material characteristics. The test pit logs included in this report should be reviewed for, specific information at individual test pit locations. The stratifications shown on the test pit logs represent the conditions only at the actual test pit locations., Variations may occur and should be expected between test pit locations. The stratifications represent the approximate boundary between subsurface materials and the actual transition may be gradual. Laboratory Testing Selected samples of the' subsurface soils were returned to our laboratory for further evaluation to aid in classification of the materials. The laboratory evaluation consisted of visual ,and textural examinations, moisture content determinations, gradation analysis and Atterberg Limits testing. Consolidation-swell tests were performed on the dark brown sandy lean clay (sometimes referred to as "granular clay" in our field inspection reports). The sandy lean clay soil was tested because it is predominantly the soil found within the upper 2 to 3 feet of the lots. Based on visual observation of the, underlying sandy fat clay and fat clay with. sand soils, we visually determined them to be highly expansive and did not perform cohsolidation-swell testing. The sandy lean clay soil was remolded at two different moisture contents--below optimum--and percent compaction prior to testing. The results of the consolidation-swell tests indicate that sandy lean clay is moderately expansive when near optimum moisture content, 26.5 percent ,(when compacted to 93 percent of a Standard Proctor, ASTM 0698). At 26.5 percent moisture and 93 percent compaction, the sample required a confining pressure of 1,500 psf to offset its propensity to swelL A second test conducted at IS percent moisture content and 90 percent compaction, resulted in a required cbnfining pressure of 2,500 psf. . " Conclusions and Recommendations I The following issues will influence lot development. 1. Non-structural sandy clay fill has been spread loosely inconsistently throughout the lots. Some portions of the fill contain a significant amount of organics, including topsoil and grass sod. This material is not appropriate for supporting building foundations or slabs on grade and should be removed in its entirety within the limits of the foundation and slab on grade~ On January 10, 2000 Mike Dewey of PSI documented the following summary of estimated non-structural fill on the lots. It should be noted that the depths of fill may vary significantly from what is reported below. Additionally, lots not mentioned below may also contain non-structural fill that was hot visually apparent. A. Lots 81-90: L to 4 feet of non-structural fill. B. ' Lots 94- 105: I to 2-1/2 feet of non-structural filL C. Lots 111-116: 1 to 3 feet of non-structural filL D. Lots 122-124: up to 1 foot of non-structural fill; , E. ,Lots 144-145: 6 to 8 feet of strip pings and sod stockpiled within the swale that borders the lots. Note that this is anticipated to be outside of the building pads but should be confirmed during pad construction. : F. Lots 146- I 54: 'l2 to 1 foot of non-structuraHilL ~ ~~ .' PSI File No. 722-90227 January 17, 2000 3 G. Lot 155: approximately 1 foot of non-structural fill placed on unstripped original , grade.. , ' ,J H/ L.nrS /)0 -/01- {J(P~ -Fl'2- Iy.fl~ 1'1f1/{; r/i( wI Mjq--s' of 2.. ' Because it is highly likely there is buried non-structural fill on some lots that PSI is not aware of, it is imperative that PSI explore the subgrade soils down to the native undisturbed soils withi!l each lot prior to foundation construction. 2. Expansive soils were generally encountered within ,the upper 7 feet of the test pits. The expansive soils, when allQwed to dry and hydrate, will experience significant shrinking and heaving. The expansive soils, if allowed to .repeatedly change moisture content during the wet and dry seasons, will negatively impact the performance of the house foundations and slabs on grade. We do not recommend constructing foundations and slabs on grade without implementing preventative measures. In order to protect the expansive soils from repeated moisture content change, we recommend that footings bearing on expansive soils be overexcavated and replaced with at least 12 inches of crushed stone structural fill (i.e.% or 1-1(2 inch minus) compacted to at least 95 percent of ASTM 0698. Additionally, we recommend that fmis~ grade adjacent to the exterior portion of the footings and slabs be at least 2 feet higher than the expansive bearing soils. This is to provide a buffer from environmental changes that could cause the expansive soils to dry and hydrate. It will be imperative that the 2-foot buffer of landscape soil be compacted to a firm condition to reduce the infiltration of water at the surface. During foundation construction, water should not be allowed to collect in foundation excavations, on floor slab areas, or on prepared subgrades of the construction area either during or after construction. Undercut or excavated areas, should be' sloped toward one comer to facilitate .removal of any collected rainwater, groundwater, or surface runoff. Additionally, the expansive clay soils should not be allowed to dry out during excavation, We suggest providing a granular surface cover 6 to 12 inches of 14" minus crushed stone immediately after exposing the expansive soils, and no later than the same working day. Positive site drainage and foundation drains should be provided to reduce infiltration of surface water around the perimeter of the building and beneath the floor slabs. The permanent grades should be significantly sloped away from the' building areas and surface drainage should be collected and discharged such that water is not pennitt~d to infiltrate the backfilland floor slab areas of the residence, , ' All crawl spaces should be provided with a low-point crawl space drain connected to the storm sewer or approved disposal system (outlet). All areas of the crawl space should be graded to drain to the low-point drain. All crawl space areas should be ,covered with a visqueen moisture barrier. The low-point drain should be lower than the elevation of the visqueen moisture barrier. ' , , If the expansive material is used as structural fill" it should be compacted at least 2 to 3 percent above optimum moisture content as determined by the Standard Proctor method, ASTM 0698. The moisture content of the fill material should be uniform. Care should be taken not to overcompact the material-90 to 95 percent compaction as detennined by ASTM 0698 is recommended. The above recomme'ndations are general in nature and should ,not be implemt;:nted without retaining PSI to observe individual lot subgrade conditions prior to foundation construction. . We anticipate that a test pit will need tp be excavated within the crawl space of the building pad to confirm the presence and depth .;l4, ~' ..;'. PSI File No. 722-90227 January 17, 2000 4 of non-structural fill and expansive soils. At that time, PSI will determine' if the recommendations contained in this report are appropriate for specific lots. If we can be of further aSsistance, please call Troy Hull in our Portland office at (503) 289-1778 or Brian Currier in our Springfield pfficeat (541) 746-9649. . Respectfully Submitted, Professional Service Industries, Inc. C;;:1LQfl for. I EXPIRES: 6/30 6' i~-~ .~--~~ ~.,'J Tr()~. ,~u II, tI;:.:~,\ \ rroJect:E~~er ,,I Charles R. Lane, P .E. , Senior Geotechnical Engineer TMJ:I:tmh , Cc: Glenn Ling, Ling and Associates Miles Breadner, Breadner Parker and Associates Ltd. Brian Currier, PSI-Springfield Attachments: Test Pit Location Map Test Pit Logs Laboratory Testing Results General Notes , S:\~hared\groups\704\geo eval\72290227 j l.~~;l Information ~..,. .'1bBuildQn Engineering. Consulting. Testing April 27, 2000 Mr. Brian Taylor Brian Taylor Construction 2318 North 320d Street Springfield, Oregon 97477 Subject: Pad Completion Letter AmbJeside Me9dow!I, Lot # 24 Springfield, Oregon " Dear Mr. Taylor: Professional Service Industries, Inc. (PSI) has completed a house pad subgrade evaluation at the above referenced lot. The foundation sub grade soils within the house pad area were visually classified as orang ish brown to gray clayey sand with weathered bedrock. The house pad area was probed with a Yz inch diameter soil probe and appeared finn at the time of our site visit. Moisture content tests were taken at various locations throughout the house pad. The moisture contents tested were approximately 28 percent. Based on previous testing perfonned on the soil type, the moisture content test taken is acceptable for this type of potentially expansive soil. The contractor then placed approximately 4 inches of crushed aggregate, granular fill over the house pad area to achieve final grade and compact the material. The crushed aggregate, granular fill visually appeared to be well compacted at the time of our site visit. Additionally, we recommend that finished grade adjacent to the exterior portion of the footings and slabs be at least 2 feet higher than the expansive bearing soils. This is to provipe a buffer from environmental changes that could cause the expansive soils to dry and hydrate. It will be imperative that the 2-foot buffer of landscape soil be compacted to a finn condition to reduce the infiltration of water at the surface. During foundation construction, water should not be allowed to collect in foundation excavations, on floor slab areas, or on prepared sub grades of the construction area either during or after construction. Undercut or excavated areas should be sloped toward one comer to facilitate removal of any collected rainwater, groundwater, or surface runoff. . "",j Positive site drainage and foundation drains should be provided to reduce infiltration of surface water around the perimeter of the house and beneath the floor slabs. The penn anent grades . should be significantly sloped away from the house building areas and surface drainage should be collected and discharged such that water is not pennitted to infiltrate the backfill and floor slab areas of the residence. Professional Service Industries, Inc.. 1040A Shelley 51.. Springfield. OR 97477. Phone 5411746-9649. Fax 5411746.7163 ~ .... Apri127,2000 Page 2 "'. All crawl spaces should be provided with a low-point crawl space drain connected to the stonn sewer or approved disposal system (outlet). All areas of the crawl space should be graded to drain to the low-point drain. All crawl space areas should be covered with a visqueen moisture barrier. The low-point drain should be lower than the elevation of the visqueen moisture barrier. Based upon our observations, the house pad subgrade appears to have been constructed in general accordance with industry standards for lightly loaded (1,000 pounds per square foot or less) foundation loads typical for this type of construction. If you have any questions regarding this report, please feel free to contact us at 746-9649. Respectfully Submitted, PROFESSIONAL SERVICE INDUSTRIES, INC. ~~ EXPIRES: 6/30 0 I . Brian Currier, E.I.T. Staff Engineer Troy Hull, P.E. Project Engineer Single Family and Duplex Construction Most Commo'h.ly Missed Items , SPRINOF'ELD ."'..'}2-1:'I;II..itj~I=l"JII.'I;",.<1'J.-';' A, ~~ DEVELOPMENT SERVICES ..... t(f 225 FIFTH STREET " ' SPRINGFIELD, OR 97477 This sheet is attached for your convenience. Included are many often missed requirements of the building codes, Springfield inspection staff will check for these itemS as well as all other requirements of the codes, There may also be items marked in red on the plans approved by the City that will be verified by the inspectors, When structural engineering accompanies plans, the inspector will also verify that detailing, Complete requirements of the code can be found in the 1998 State of Oregon Edition of the 1.I.nternational Qnearr~~::::j:~~~~:~I:i~~~~~o~;~~:~:.;umber,ins~:~:~~~~:c~~tj~~~.~:e~:::~:~~;=~~;~~.3;~3~~~.. . _ ._.~~=--'_.'.~=~-,,~.I BUILDING PLANNING I. Provide ventilation in every habitable room by means of operable exterior openings equal to at least 5% of the floor area of the room, Exception: Provide a mechanical ventilation system capable of producing 0.35 air changes per hour in the room, [303.1] 2, Bathrooms shall have exterior glazed openings of not less than 3 sq ft., half of which must be able to open, or a venting system capable of five air changes per hour. Vent to outside. [303.3]. . 3. Habitable rooms shall have a ceiling height of not less than 7' for at least 50% of their required floor area, [305,1] 4, Provide a minimum of 30" wide x 21" deep space in front of all water closets, [307,2] 5. Provide laminated, tempered, or heat-strengthened glass for all glazing located in door ~ssemblies, railings, tub and shower enclosures, or within a 24" arc of a door. Exception: Glazing in tub and shower enclosures and near doors need not be tempered if located at least 60" above the adjacent floor or drain inlet. [308.4] . 6, Openings between the garage and residence shall be equipped with either solid wood doors not less than I 3/8" in thickness or 20- minute fire-rated doors. [309,1] , 7. The garage shall be completely separated from the residence and its attic area by means of 112" gypsum board or the equivalent applied to the garage side. [309.2] 8. Garage and carport floors shall be sloped to drain liquid toward a drain or the main vehicle entry door. [309,3] 9, Provide operable egress windows in each bedroom with a minimum net clear opening of5.7 sq, ft, (Min. 5 sq, ft, when sill is located within 44" of adjacent exterior grade.) Least net open height: 22"; least net open width: 20"; maximum sill height: 44". [310.1,1 ] 10. Enclosed accessible space under stairs shall have walls and soffits protected on the enclosed side with 1/2" gypsum board or equ ivalent. [314.8] ] I. Minimum hallway width 36" finish wall to finish wall. [3 I 4,1] 12, A minimum 3' x 3' landing is required on each side of an egress door, maximum 1-112" below the top of the threshold. [312] Exceptions: I, At the top of a flight of stairs, provided the door does not swing over the stairs. 2, At required exit door, shall not be more than 8" below the top of thresh hold when the door swings in.[312] ] 3. Min. stairway headroom 6'- 8"; Min, Riser 4"; Max. Riser: 8"; Min, Tread: 9"; Min, clear' width above handrail: 36", [314] 14. Provide means to illuminate both interior and exterior stairways including landings and treads, [303.4] ] 5, Provide a continuous handrail on at least one side of stairways of more than three risers, I 114"_ 2-5/8" cross-sectional dimension with a gripping surface and no sharp corners, 30" to 38" above the nosing of the tread, with a minimum 1-1/2" clearance to the wall, [315,1 & 315.2] 16. Open sides of stairs with a total rise of more than 30" above the floor or grade below shall have guardrails not less than 34" in height measured vertically from the nosing of the treads. Intermediate rails shall be spaced so that they do not allow passage of an object 5" or more in diameter, [315.3,315.4] 17, Porches, balconies, or raised floor surfaces located more than 30" above the floor or grade below shall have guardrails, minimum 36" in height, with intermediate rails which do not allow passage of an object 4" or more in diameter, [315.3, 315.4] 18, Required exit door shall be a side-hinged door and not less than 3' in width and 6'8" in height.[311.3] 19, Provide 5/8" Type 'X' gypsum board, or equivalent one hour assembly, each side of duplex party wall, anq extend to roof sheathing.[320,]] ., 20, All habitable rooms and area shall be provided with a permanent approved heat source capable of maintaining a temp, of 68 degrees F. at a point 3' above the floor.[303,6]' , FOUNDA TJON/GRADlNG 21, Gravel or other structural fill deeper than 4" which is placed to support foundations must be inspected during placement and compaction by a special inspector. Provide copies of special inspection reports to the City inspector. 22, Concrete shalrbe 5~ 7% air entrained'with a minimum compressive strength of: a) 2500 psi for qasernent walls and foundations not exposed to weather and for basement slabs and interior slabs on grade (except garage slabs);' b)3060 psi for basement, foundation and exterior walls and other vertical work exposed to weather; c) 3000 psi for carport and garage floor slabs and for porches and steps exposed to weather. [402.2 and Table 402,2] 23, Minimum footing sizes shall be as follows: [Table 403,1.1] Supporting I floor and a roof: 12" wide*, 6" thick, 6" thick stem wall- 2 floors and a roof: 15" wide'!- 7" thick, 8" thick stem wall 3 floors and a roof: 18" wid~ 8" thick, 10" thick stem wall " *When load bearing capacity of soil is 1000psf, 18" wide footing is r~quired for 1 story, 23" for 2 story, 27 for 3 story 24, Footings shall be m in imum 12" below grade. [403,1] Stem walls shall extend at least 6" above finished grade, [403,1.3] 25, The sill plate or floor system shall be anchored to the foundation with minimum lI2" diameter bolts, embedded at least 7" inches into concrete or masonry, spaced at 6'-0" on center maximum with at least two bolts per plate and one bolt within 12" of ends or corners. [403.1,5] 26. Foundation drainage shall be provided around foundations enclosing habitable or usable space below grade. [405.1] 27, Columns and posts shall be anchored to prevent lateral displacement. Exception: Columns less than 4' in height, bearing on a pier or footing within a crawl space that is enclosed by a continuous foundation wall need not be restrained at the bottom end. [408.3] 28, Provide 12" clearance to grade from underside of girders and beams and 18" clearance to grade from underside of joists or provide pressure treated wood, [322.1] 29. Provide 3" min, bearing for girders entering masonry or concrete, with 1/2" air space on tops, sides and ends. [502.4, 322,1] 310, Provide access to all underfloor areas: 18" x 24" minimum. [409,2] , , 3 I, Provide underfloor ventilation equal to I square foot for every 150 feet. One vent is required within 3' of each corner. Vents shall have corrosion-resistant wire mesh or equivalent with the least dimension being lI8". Underfloor ventilation may be reduced to 1 II 50.0 of the crawl space area where 6 mil. black polyethylene sheeting or other approved ground cover is installed.. [409.1] 312, Provide 6 mil. black polyethylene ground cover, lapped 12" at joints and extending 12" up foundation walls, in all crawl spaces where underfloor insulation is installed, [C401.9.2] 313, Provide 55# rolled roofing or 6 mil. black polyethylene over 4" clean sand, gravel, or crushed rock beneath all concrete floor slabs, [505,2,3,C40 \,9,2] , 34, The grade away from foundation walls shall fall a minimum of 6" within the first 10', [40 J .3] Where there is evidence that surface water does not readily drain or that groundwater table can rise to within 6" of the finished grade at the building perimeter, an approved drainage system shall be installed. [409.4] 35, Slopes for permanent cuts or fills shall not be steeper than 2 units horizontal to I unit vertical. Exception: Steeper slopes may be permitted when a soils investigation report containing data to justify such slopes is approved by the City. [40] .6] 316, Sealing required between wall and floor, between floor and foundation to prevent air leakage into building envelope.[C40 1.8,2] 317, Ground under building shall be sloped to a low point, and an underfloor drain installed to provide positive drainage from the area under the building,[409.4- B.O.] (continued on back) I WALLS & ROOFS 38. Gypsum J:>oard used as shower and bathtub ceral)lic tile backing shall be water-resistant. All cut or exposed edges, including those at wall intersections, shall be sealed as recommended by the manufacturer. [702.4,2]. 39. Masonry veneer anchors may support 22/3 square feet of veneer, maximum, and shall attach to continuous #9 wire.[703,7] 40, Flash all exterior doors, windows and horizontal wood trim, [703,8] , 4 I. Provide bracing at all gable end walls exceeding 14 feet in length, [See standard City of Springfield details for approved bracing methods.] , 42, Nalls and staples must not be consistently over driven beyond tlush with the sheathing surface, 43, Shear wall nailing or stapling must remain exposed for inspection and approval. 44, Truss Engineering must be on job site at framing inspection, for all type trusses used, [502,10; 802.11] 45, Trusses shall not bear on partition walls unless so designed. [30 I, I] 46. Enclosed attics and rafter spaces shall be provided with cross ventilation. Net ventilating area shall be not less than 1/150 of the' attic area. Exception: Net ventilating area may be reduced to 1/300 when at least 50% and not more than 80% of the ventilators are located at least 3' above the eave or cornice vents or when an approved vapor barrier is installed on the warm side of the insulation. Provide a I" minimum air space above insulation and baffle at eave or soffit vents. [806, E40 1,2,1] 47, A readily accessible attic access framed opening not less than 22" x 30'" shall be provided to any attic area having a clear height of over 30", [807.1] , 48, Roof coverings shall comply with the general requirements of Chapter 8 and the specific requirements of each section based upon type of material: a) asphalt shingles [903]; b) slate shingles [904]; c) metal [905]; d) tile, clay or concrete shingles [906]; e) built-up roofing [907]; f) wood shingles [908]; g) wood shakes [909]. 49. RoOf storm drains shall be provided to collect and discharge storm drainage to an approved drainage system,[80 1,3] 50, End walls to be step tlashed or to manufacturers specs,[903.3] FIREPLACES 51. See requirements in Chapter 10 for masonry chimneys and fireplaces, Factory built fireplaces shall be installed according to their listing and the manufacturer's installation instructions, 52, Solid fuel burning masonry fireplaces shall be provided with an outside air inlet, at least 6 sq, In. (3" in diameter). The inlet shall be closeable (dampered) from the building interior. Duct shall be non-combustible and continuous from the interior to the exterior of the building, The inlet shall be located near, or on the tloor, within 24 inches of the fireplace or appliance. [1006,3-1006.4] MECHANICAL & PLUMBING 53. Heating and cooling appliances located in a garage or other area where they may be subject to mechanical damage shall be suitably guarded against such damage. (Protection is typically provided by concrete filled pipe bollards,) [1307,3, 3310,3] 54, Appliances which generate a glow, spark or tlame capable of igniting tlammable vapors and are located in the garage shall be installed with the burners, burner ignition devices or heating elements and switches minimum 18" above the tloor level. [1307,3, 3310, I] 55. Fuel burning warm air furnaces and water heaters shall not be installed in a room designed to be used as a storage closet. Furnaces or water heaters located in a bedroom or bathroom shall be installed in a sealed enclosure such that combustion air will not be taken from the living space. Direct vent units are not required to be installed within an enclosure. [1402,1, 3309] 56. Combustion air must be provided for all fuel burning appliances except direct vent units, [2001.1 to 2001.5] 57, Provide access to attic furnace (22" x 30") or undertloor furnace (30" x 30"), Provide a permanent electric outlet located near the furnace and I ighting fixture controlled by a switch at the passageway opening. [1401.6-140 1.7] 58, The maximum amount of water used by new plumbing fixtures: a) toilets: 1.6 gal. per tlush; b) shower heads: 2.5 GPM; c) interior faucets: 2,5 GPM [3202] 59. Minimum shower compartment: 1,024 sq, in,; shall also be capable of encompassing a 30" circle [3210.3]. 60, Showers and tub-shower combinations shall be equipped with control valves of the pressure balance, the thermostatic mixing, or the combination pressure balance/thermostatic mixing valve type with maximum mixed water setting of 120 degrees farenheight. [3215 ] 61. Equipment used for heating water shall be protected by combination pressure and temperature relief valves. [3408,3] 62, Water heaters shall be anchored to resist horizontal movement. (i,e. earthquake strapping) [3310.5] 63, Storm water drains located within 5' of a building may be Schedule 40 ABS or Schedule 40 PVC installed per installation standard IA. [3501.1.2] 64, Clothes dryer ducts shall terminate outside the building. Max length is 25', reduce 2.5' for each 45deg. elbow.[ 180 1.3] 65. Warm air furnaces shall not be installed in a room designed to be used as a closet.[ 1402.1] ELECTRICAL 66. RESIDENTIAL ELECTRICAL PLANS ARE NOT REVIEWED PRIOR TO PERMIT ISSUANCE" All electrical work shall comply with current codes and will be field-inspected for compliance, 67, Provide grounding electrode at electrical service, consisting of (or connected to) a minimum 20' length of 1/2"diameter steel reinforcement in footings, [4108.1,2] 68. GFCI protection required for receptacles in outdoor locations, garages, unfinished basements, bathrooms, where serving counter- top surfaces in kitchens, and when within 6' of wet-bar sinks, [4402] 69, Provide an approved smoke detector in each sleeping room, outside of each separate sleeping area, and on each additional story of the dwelling. All detectors shall be interconnected and shall provide an alarm audible in all sleeping areas, Smoke detectors shall be iocated minimum 3' upstream of air ducts, [316,1] 70, All smoke detectors shall receive their primary source of power from the permanent built-in wiring, with battery back-up in case power is interrupted. Exception for remodels: hardwiring and interconnection is required only if other remodeling considerations require removal of the appropriate wall and ceiling coverings to facilitate wiring. [316,1.1,3] 6.2] 7 I. Recessed light fixtures installed in cavities intended to be insulated shall be labeled as suitable for being installed in direct contact with insulation (IC rated). [4503,5] 72. Electrical outlets and approved 'wall fixtures in the fire separation wall shall not be located back to back. Use metal boxes no larger than 16 sq. inches placed in separate stude spaces for the 2 dwelling units,[320,2] ENERGY CONSERVATION 73, Provide approved vapor barrier installed on the warm side (in winter) of insulation at all unventilated exterior walls, tloors, and ceilings enclosing conditioned space; [C40 1.9.1] 74. PATH I Insulation requirements: (Section C401 for alternative insulation paths,) Exterior Walls: R-21, Basement Walls: R-15, Undertloor: R-25, Slab Floor Edges: R-15, Flat Ceilings: R-38, Vaulted Ceilings: R-30 (max, 50% oftloor area), Main Entry Door (max, 24sf): U'f;0.S4, Other Exterior Doors: U=0.20, Windows: U=0.40, Skylights (max, 2% pf tloor area): U=O,50, Forced Air Ducts: R-8. [Table C40 1.1 (I)] 75. Alterations within ar).existing building envelope may use the minimum component insulation requirements: Exterior Walls: R-15, Basement Walls: R-15, Undertloor: R-21, Slab Floor Edges: R-l 0, Flat Ceilings: R-38, Vaulted Ceilings: R- 21, Exterior Doors:~=O,54, Windows & Skylights: U=O,65, Forced Air Ducts: R-8, [C I 0 1.2.3, Table C40 1.1 b Footnote C] _..------------------------------------~---------------..,------------------------------------------------------------------------------------------------------------------...------------------------ --- Reminders for the Builder: I The approved building Ptlrmit plans must remain at the construction site and available to city inspectors at all times, 2 Construction must be corilpleted in compliance with the approved plans and specitications, Proposed changes must be approved b~ the City, 3, All permits expire) 80 days after issuance if no inspections have been called tor orno activity has commenced on the project , Most inspections can be provided on the same week ~ay, if the inspection request is made prior to 7 a.m. t ,,~\'" V Ambleside Meadows Subdivision - 1st Addition Excavation and Foundation requirements for new structures on individual lots (Draft) The geotechnical information prepared for this subdivision revealed moderate to high soil expansion characteristics for the subrgrade and much of the fill material used on the sites. Some sites have documented compacted fill using native or imported fill materials. Other sites have undocumented fill or fill materials that are inappropriate or are not properly compacted, while still other sites have little or no information regarding fill or original grades. The geotechnical information for the subdivision contains recommendations that address the varying site conditions. The information is contained in a letter addressed to the City of Springfield, issued by PSI Engineering Consultants dated January 17, 2000. A copy of the letter is attached: The following criteria will be used by the City of Springfield for residential construction projects on lots located within the subdivision. A licensed design professional (engineer or architect) shall review the soil conditions on each lot to determine the extent of excavation (verifying the removal of unsatisfactory materials) and to determine the quantity and type of compacted fill required within the building "foot print" and to specify the method of compaction (the geotechnical information for the subdivision recommends that footings bearing on expansive soils be overexcavated and replaced with at least 12" of crushed rock structural fill with proper compaction - i.e., 95% of ASTM D698). Each site is required to maintain constant optimum moisture content within the excavated area' under and around the building. The licensed design profession/al shall establish and verify methods to be used by the contractor/owner to insure moisture stability within that area. ( (The geotechnical report recommends providing a minimum of 6-12 inches of %" minus crushed rock cover immediately after exposing the expansive soils to prevent drying of the exposed soil, and recommends establishing a finish grade adjacent to the building at least 24" above the expansive bearing soils.) Moisture stability of the subgrade shall be) established the same day as the excavation, and verified by the design professional'. The design professional shall also direct the contractor/owner how to maintain a constant'subgrade moisture level within the construction area throughout the project and thereafter (footing drains, etc., where required). The crawl space area shall be sloped to a low point drain below the surface of the gravel or the plastic moisture barrier at one corner of the crawl space. Water shall not be allowed to collect in the foundation area or on the prepared subgrades either during or after construction. The licensed design professional shall verify that approved positive drainage' is provided' from the excavated area at the time of excavation. Connection to storm drains or curb and gutter shall be done prior to ., 'l" ........=-..' completing th~excavation/fill for the building pad. \ Underfloor drains shall not be cdhnectea"to roof storm drain lines unless approved by the licensed professional'. The licensed design professional ~hall submit a report of his observations, ~~~~""-',/~;~, .; , ~ recommendations and verifications to the City for approval prior to allowing fhe placement of foundation concrete in forms. The report shall include the following: 1.1i\ Date the evaluation was made. 2, Location evaluated (Le., address or tax lot and the area of the site evaluated). " 3:' Acknowledgment of receipt of the geotechnical information referenced above. A statement indicating the depth and width of the excavation and the engineered fill necessary to assure stable moisture content for the proposed foundation. S!' A statement whether perforated perimeter foundation drains are required' to maintain moisture stability (Submit a drawing for the desigr) of any perimeter foundation drains required by the design professional). 6~ Specifications for the placement, compaction and testing of the engineered fill.' Specifications for any foundation steel required by the Design professional that is not shown on the foundation drawings for the building. 8.' A statement that the design professional witnessed placement and compaction of the engineered fill and approved it for construction Eor provide a separate report by a special inspection firm - includirig compaction tests). 9.' A statement that the design professional observed required moisture stability procedures that were accomplished before any changes occurred in the moisture content of the subgrade.- A statement that the design professional has observed and approved the installation of the required low-point drain and identifying where the drain is located at the building and where it terminates (must be to an approved location, Le.- street gutter, storm sewer, sump. pump & discharge line, etc). A statement that the site, as prepared, is adequate to maintain a constant moisture consistency in the subgrade and is adequate to support the f proposed structure. , . 4. 7. I 10. 11. The report shall contain the stamp and original signature of the licensed design professional. . NOTE 1: A separate report from the design professional may be submitted for the required low-point drain (item #9), but it must be submitted to and approved by the City prior to requesting post and beam 'inspection. Note 2: Site exavation and backfill information for several of the lots is available from field reports prepared by PSI, the geotechnical consulting firm. A copy of the field reports is available for review in the Springfield City Hall Offices, Building Permits Section.