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• Residential J EI 154 • Co • Weatherization JB INSULATION MPA • Shelving /Accessories "Your Insulation Specialist Since 1979" ED N � • Firestopping CEV I JUN 17ZU REVISED INSULATION SUBMITTAL CITY OFTIGARD BRIAN PAULTZ BUILDING DIVISION 13270 Menlor Lane Permit No. MST 2006 -00104 Spray Foam N.C.F.I. 4" Closed Cell Foam at roof With R -13 fiberglass batt Average R- Value: 38 Thank you. 5/13/08 FILE COPY 14255 SW Galbreath Drive • Sherwood, Oregon 97140 • Office 503.625.9700 • Fax: 503.625.9730 Federal I.D. # 87- 0572162 • Contractors Board # 127440 Permit # MST2006 -00104 13270 Men lor Lane, Tigard Brian Pautz 2x8 14 guage metal joist average b inch c.c. spray foam 5/8 inch sheathing x/10 O ' '�� VW. '1/►1■. .,�. D Total R value equal to R -38 Value VIII.. vb., / - , ��11 ./ / O Fiberglass Batt. ,,:` l t� j 41 No r----- ESR -1615 ES REPORTTM Reissued April 1, 2008 This report is subject to re- examination in one year. ICC Evaluation Service, Inc. Business/Regional Office • 5360 Workman Mil Road, Whittier, California 90601 • (562) 699 -0543 Regional Office • 900 Montclair Road, Suite A, Birmingham, Alabama 35213 • (205) 599 -9800 WNW. I cc- eS.orq Regional Office 4051 West Flossmoor Road, County Club Hills, Illinois 60478 ■(708)799 -2305 DIVISION: 07— THERMAL AND MOISTURE PROTECTION 3.2 Surface- burning Characteristics: Section: 07210 — Building Insulation The insulation, at a maximum thickness of 4 inches (102 mm) and a nominal density of 2 pcf (32 kg /m has a flame - spread REPORT HOLDER: index of less than 25 and a smoke - developed index of less than 450 when tested in accordance with ASTM E 84. NCFI POLYURETHANES Thicknesses of up to 8 inches (203 mm) for wall cavities and POST OFFICE BOX 1528 12 inches (305 mm) for ceiling cavities are recognized based MOUNT AIRY, NORTH CAROLINA 27030 on room corner fire testing in accordance with NFPA 286, (336) 789 -9161 when covered with minimum 1 / 2 -inch-thick (13 mm) gypsum www.ncfi.com board or an equivalent thermal barrier complying with, and Roger.morrisonPncfi.net installed in accordance with, the applicable code. EVALUATION SUBJECT: 3.3 Thermal Transmission R- values: The insulation has thermal resistance R- values, at a mean INSULSTAR SPRAY APPLIED POLYURETHANE temperature of 75'F (24 °C), as shown in Table 1. INSULATION 3.4 Aldocoat 757 Intumescent Coating: 1.0 EVALUATION SCOPE Aldocoat 757 intumescent coating is manufactured by Aldo Products Company and is a water -based latex coating with Compliance with the following codes: specific gravity of 1.4. Aldocoat 757 is supplied in 5- gallon • 2006 International Building Code (IBC) (19 L) pails and 55- gallon (208 L) drums and has a shelf life of six months when stored in a factory- sealed container at • 2006 International Residential Code (IRC) temperatures between 40 °F (4.5 °C) and 90 °F (32 °C). • 2006 International Energy Conservation Code (IECC) 4.0 INSTALLATION • Other Codes (see Section 8) 4.1 General: Properties evaluated: InsulStar insulation must be installed in accordance with the • Surface- burning characteristics manufacturer's published installation instructions and this report. The manufacturer's published installation instructions • Physical properties and this report must be strictly adhered to, and a copy of the • Thermal resistance instructions must be available at all times on the jobsite during • Attic and crawl space installation installation. 2.0 USES InsulStar insulation must be spray - applied on the jobsite using a volumetric positive displacement pump as identified in InsulStar insulation is used as a medium - density thermal the NCFI application manual. The InsulStar R component insulating material and has been evaluated for use in Type V- must not be stored at temperatures below 65 °F (18 °C) or B construction (IBC) and dwellings under the IRC. Under the above 85 °F (29 °C). InsulStar must not be used in areas that IRC, the insulation may be used as a vapor retarder, or as an have a maximum in- service temperature greater than 180 °F air - impermeable insulation when applied in accordance with (82 °C). The foam plastic must not be used in electrical outlet this report. or junction boxes or in direct continuous contact with water. 3.0 DESCRIPTION The InsulStar insulation, with a maximum nominal thickness of 8 inches (203 mm) for wall cavities and 12 inches (305 mm) 3.1 General: for ceiling cavities, must be separated from the interior of the InsulStar is a spray - applied cellular polyurethane foam plastic building by an approved thermal barrier of 0.5 -inch (12.7 mm) insulation that is installed in cavities of roofs, ceilings, floors, gypsum wallboard or an equivalent 15- minute thermal barrier crawl spaces and stud wall assemblies. The foam plastic is a complying with and installed in accordance with the applicable two- component, closed -cell, one -to- one -by- volume spray foam code. Within an attic or crawl space, installation must be in system with a nominal density of 2 pcf (32 kg /m InsulStar accordance with Section 4.2. insulation may be used for application to wood, metal, 4.2 Attics and Crawl Spaces: concrete, masonry and gypsum board surfaces. InsulStar insulation liquid components are supplied in nominally 55- 4.2.1 Application with a Prescriptive Ignition Barrier: gallon (208 L) drums, labeled as "A" component or "R" When InsulStar insulation is installed within attics or crawl component. spaces where entry is made only for service of utilities, an REPORTS" are not to be construed as representing aesthetics or any other attributes not specifically addressed, nor are they to be construed as an endorsement ofthe subject ofthe report or a recommendation for its use. There is no warranty by ICC Evaluation Service, Inc., express or implied as to any finding ANSI:. - or other matter in this report, or as to any product covered by the report. Y ANSI ken.. Moon 1410010 CLATtICATION Copyright m 2008 Page 1 of 3 Page 2 of 3 ESR -1615 ignition barrier must be installed in accordance with IBC 5.2 InsulStar insulation and Aldocoat 757 intumescent Section 2603.4.1.6 or IRC Sections R314.5.3 and R314.5.4, coating must be installed in accordance with the as applicable. The ignition barrier must be consistent with the manufacturer's published installation instructions, this requirements for the type of construction required by the evaluation report and the applicable code. The applicable code, and must be installed in a manner so that the instructions within this report govern if there are any foam plastic insulation is not exposed. InsulStae insulation as conflicts between the manufacturer's published described in this section may be installed in unvented attics in • installation instructions and this report. accordance with IRC Section R806.4. 5.3 InsulStar insulation must be separated from the interior 4.2.2 Application without a Prescriptive Ignition Barrier: of the building by an approved 15- minute thermal barrier, Where InsulStar insulation is installed in accordance with as described in Section 4.1, except when installation is Section 4.2.2.1, the following conditions apply: in attics and crawl spaces as described in Section 4.2. • Entry to the attic or crawl space is only to service utilities, 5.4 InsulStar insulation must be protected from the weather and no heat - producing appliances are permitted. during application. • There are no interconnected basement or attic areas. 5.5 InsulStar insulation must be applied by installers certified by NCFI Polyurethanes. • Air in the attic is not circulated to other parts of the 5 . 6 Use of InsulStar insulation in areas where the building. probability of termite infestation is "very heavy" must be • Ventilation of the attic or crawl space is provided in in accordance with IBC Section 2603.8 or IRC Section accordance with the applicable code, except when air- R320.5, as applicable. impermeable insulation is permitted in unvented attics in 5.7 Jobsite certification and labeling of the insulation must accordance with Section R806.4 of IRC. comply with IRC Sections N1101.4 and N1101.4.1 and 4.2.2.1 Application with Intumescent Coating: In attics, IECC Sections 102.1.1 and 102.1.11, as applicable. InsulStar insulation may be spray - applied to the underside of 5.8 InsulStar insulation at a 1 ( 33.3 mm) thickness roof sheathing or roof rafters, and /or vertical surfaces; and in or greater is a vapor retarder as defined in IRC Section crawl spaces, InsulStar insulation may be spray- applied to R202 and IECC Section 202. the underside of floors and /or vertical surfaces as described in this section. The thickness of the foam plastic applied to the 5.9 InsulStar insulation is produced in Mount Airy, North underside of the top of the space must not exceed 10 inches Carolina, and Clearfield, Utah, under a quality control (254 mm). The thickness of the foam plastic applied to vertical program with inspections by Construction Materials surfaces must not exceed 6 inches (152 mm). The foam Technologies (M -709). . plastic must be covered with a minimum nominally 10 -mil 6.0 EVIDENCE SUBMITTED (0.25 mm) wet film thickness of the Aldocoat 757 intumescent coating described in Section 3.4. The Aldocoat 757 6.1 Data in accordance with ICC -ES Acceptance Criteria for intumescent coating must be applied over the InsulStare Spray - applied Foam Plastic Insulation (AC377), dated insulation in accordance with the coating manufacturer's October 2007. instructions and this report. Surfaces to be coated must be 6.2 Reports on room corner fire tests in accordance with dry, clean, and free of dirt, loose debris and any other NFPA 286. substances that could interfere with adhesion of the coating. The Aldocoat ® 757 coating is applied with a medium -size nap 6.3 Reports on air leakage tests in accordance with ASTM roller, soft brush or conventional airless spray equipment at a E 283. rate of 0.75 gallon per 100 square feet to obtain a 6.4 Reports on water vapor transmission tests in accordance recommended minimum dry film thickness of 7.5 mils (0.19 with ASTM E 96. mm) [10 wet mils (0.25 wet mm)]. The coating must be applied 7.0 IDENTIFICATION when ambient and substrate temperatures are within a range of 50 °F (10 °C) to 90 °F (32 °C), and requires a 24 -hour curing Components of the InsulStar insulation are identified with the time. InsulStar insulation may be installed in unvented attics manufacturer's name (NCFI Polyurethanes), address and as•described in this section in accordance with IRC Section telephone number; the product trade name (InsulStar use R806.4. and application instructions; the density; the flame - spread and smoke - development indices; the evaluation report number 4.2.3 Use on Attic Floors: InsulSte insulation may be (ESR - 1615); and the name of the inspection agency (PRI installed exposed at a maximum thickness of 12 inches (305 Construction Materials Technologies LLC). mm) between joists in attic floors. The InsulStar insulation must be separated from the interior of the building by an Aldocoat 757 intumescent coating is identified with the approved thermal barrier. The ignition barrier in accordance manufacturer's name (Aldo Products Company, Inc.) and with IBC Section 2603.4.1.6 and IRC Section R314.2.3 may address; the product trade name (Aldocoat 757); use be omitted. instructions; and the name of the inspection agency (PRI Construction Materials Technologies LLC). 5.0 CONDITIONS OF USE 8.0 OTHER CODES The InsulStar insulation described in this report complies with, or is a suitable alternative to what is specified in, those 8.1 Evaluation Scope: codes listed in Section 1.0 of this report, subject to the The products recognized in this report have also been following conditions: evaluated in accordance with the following codes: 5.1 This evaluation report and the manufacturer's published • BOCA National Building Code /1999 (BN BC) installation instructions, when required by the code • 1999 Standard Building Code (S BC) official, must be submitted at the time of permit application. • 1997 Uniform Building CodeTM'(UBC) Page 3 of 3 • ESR -1615 • 8.2 Uses: 2602.4, as applicable. The ignition barrier must be consistent See Section 2.0, except the product has been evaluated for with the requirements for the type of construction equired by Type 5-B (BNBC), Type VI (SBC) and Type V -N (UBC). the applicable code, and must be installed in a manner so that the foam plastic insulation is not exposed. 8.3 Description: 8.4.2 Use on Attic Floors: InsulStar insulation may be See Section 3.0. installed exposed at a maximum thickness of 12 inches (305 8.4 Installation: mm) between joists in attic floors. The InsulStar insulation must be separated from the interior of the building by an See Section 4.0 except the wording of Section 4.2.1 should be approved thermal barrier. The ignition barrier in accordance replaced with the wording of Section 8.4.1 and the wording of with BNBC Section 2603.4.1.4, SBC Section 2603.5.1.6, and Section 4.2.3 should be replaced with the wording of Section UBC Section 2602.4 may be omitted. 8.4.2. • 8.5 Conditions of Use: 8.4.1 Application with a Prescriptive Ignition Barrier: When InsulStar insulation is installed within attics or crawl The InsulStar! insulation described in this report complies spaces where entry is made only for service of utilities, an with, or is a suitable alternative to what is specified in, those ignition barrier must be installed in accordance with BNBC codes listed in Section 8.1 of this report, subject to the Section 2603.4.1.4, SBC Section 2603.5.1.6, or UBC Section conditions noted in Sections 5.1 through 5.9. TABLE 1— THERMAL RESISTANCE (R- VALUES) • THICKNESS (inches) I R- VALUES (°F.ft /Btu) ASTM C 518 TESTED VALUES 1 6.4 4 25 CALCULATED R-VALUES 2 13 3 19 • 3.5 22 4.75 30 5 32 6 38 7 45 7.5 48 8 51 9 57 10 64 • 11 70 11.5 73 12 76 For SI: 1 inch = 25.5 mm; 1 °F.ft /Btu = 0.176 110 °K.m 'Calculated R- values are based on tested K- values at 4 -inch thickness. { NCR POLYURETHANES , ; „;'u X Division of Barnhardt Mfg. Co. P. O. Box 1528 • Mount Airy, NC 27030 P O L Y U R E T H A N E S 800.346.8229 www.NCFLcom TECHNICAL DATA SHEET Doc 144 NCFI SPRAY FOAM SYSTEM 11 -012 DESCRIPTION: NCFI 11 -012 is a two component, one -to -one by volume, self - adhering, seamless, high insulating efficiency spray applied rigid polyurethane foam system. NCFI 11 -012 has been designed for use where Building Codes specify 25 Flame Spread and less than 450 Smoke Density per ASTM E -84. This NCR system has been formulated with HFC -245fa as the blowing agent. This NCFI system has been formulated with an anti- microbial ingredient to inhibit growth of molds that may affect this product. NCFI 11 -012 is suitable for use in the NCFI InsulStar ® and InsulBloc ® insulation systems. DISTINGUISHING CHARACTERISTICS: TYPICAL PHYSICAL PROPERTIES: • High R -Value Core Density 2.0 pcf • Zero ODP • Excellent Moisture Vapor Transmission Compressive Strength 29 psi Resistivity • High Yields Moisture Vapor High Closed Cell Content 1.8 permin • Hi 9 Transmission • Good Dimensional Stability • Meets ASTM E -84, FS <25, SD <450 Closed Cell Content . >90% at 2 inch Thickness R value © 1 inch 6.4 • @3.5 inch 22 For proper use of this NCFI insulating material refer to the NCFI Application Information and any of the Maximum Service 180 °F following codes or guides: Temperature 2 inch • International Building Code, (IBC), Chapter 26 Flammability, ASTM E -84 Flame Spread <25 • International Residential Code (IRC) Section Smoke Dev <450 R314 and R806 Note: The above values are average values ob- • API Fire Safety Guidelines for Use of Rigid tained from laboratory experiments and should Polyurethane and Polyisocyanurate Foam lnsu- serve only as guide lines. Free rise core density lation in Building Construction (AX230) should not be confused with overall density. Over- all densities are always higher than free rise core densities and take into account skin formation, thickness of application, environmental conditions, etc. Polyurethane products manufactured or produced from this liquid system may present a serious fire hazard if improperly used or allowed to remain exposed or unprotected. The character and magnitude of any such hazard will depend on a broad range of factors, which are controlled and influ- enced by the manufacturing and production process, by the mode of application or installation and by the function and usage of the particular product. Any flammability rating contained In this literature is not intended to reflect hazards presented by this or any other material under actual fire conditions. These ratings are used solely to measure and describe the product's response to heat and flame under controlled laboratory conditions. Each person, fum or corporation engaged in the manufacture, production, application, installation or use of any polyurethane product should carefully determine whether there is a potential fire hazard associated with such product in a specific usage, and utilize all appropriate precau- tionary and safety measures. ,44. ori - / 6 1 "/ / 3 7e fr/e /--- 1:1 ECEI VED Page 1 of 4 Roadway Improvement System J UN j 7 200. *•.- - • . - f : — ; , • fl rir 1 811117k,... 111= 41= -- mr - PF=e .01WIIIIIM■111111■11 TENSAR EARTH TECHNOLOGIES, INC www.tensarcorp.corn 1-800-TENSAR-1 Pautz Residence Gravel Driveway Washington County, Oregon, United States Project Reference: 675-1 Project Description Gravel driveway to residence at 13270 SW Nienlor lane. Driveway to support 60,000 lb fire truck with maximum point (wheel) load of 12,500 lbs. Dual rear axles each carry 25,006 lbs. Fri axle carries 10,000 lbs. DESIGNER Alder (:1.‘otechnical Service 3910 NE inn, Ave FILE COP y Portland, ()refl.on 97212, United States ATTN: .101111 CL/1111111:2h/11n, (TT: 503-2S2-74S2 (TF.I.,) :503-2S2-7402 1- X) alders.!eo ■- <s This document was prepared using SpectraPave2 Version 2 17 Developed by Tensaf Earth Technologies, Inc Copyright 1998 • 2006, All Rights Reserved. Alder Geotechnical Services 3910 NE 10 Avenue Portland, Oregon 97212 Phone 503.282.7482 Fax 503.282.7402 aldergeo @teleport.corn November 9, 2006 Project No. 675 -1 Mr. Brian Pautz 9685 SW Carriage Way Beaverton, Oregon 97008 STRUCTURAL EVALUATION OF GRAVEL DRIVEWAY FOR FIRE TRUCK SUPPORT 13270 SW MENLOR LANE WASHINGTON COUNTY, OREGON Dear Mr. Pautz: As requested, I have evaluated the structural support capacity of your existing gravel driveway. The purpose of my work was to determine whether the existing gravel thickness was adequate for supporting fire truck traffic. This letter presents my recommendation that the existing minimum gravel thickness of 4 inches be increased by 2 inches to provide a minimum gravel thickness of 6'/2 inches along the entire driveway. My engineering calculations are also attached for reference. Shallow test pits were dug through the existing gravel pavement at four locations along the approximately 1,000 -foot long driveway. The thickness of gravel in each pit was 4, 4, 6, and 10 inches. The subgrade soils in all four pits consisted of undisturbed, brown, native silts. Static cone penetrometer measurements in each test pit indicated that the undrained shear strength ranged between about 1,000 and 4,000 psf (7 and 28 psi). Based on these measurements, the required thickness of gravel to support a 60,000 -pound emergency vehicle and a 12,500 -pound point (tire load) calculated using the design method of Giroud (2004) The analyses are attached. The results indicate that the crushed gravel should be a minimum of 6 inches thick based on the existing soil conditions and the assumed loading. It is recommended that 2 inches of additional gravel be placed on driveway to increase the minimum gravel thickness to 6 inches. 1 Giroud, J.P. (2004). "Design Method for Geogrid- Reinforced Unpaved Roads. I. Development of Design • Method." Journal of Geotechnical and Geoenvironmental Engineering, Vol. 130, No. 8, pp. 775 -86. • Subgrade Improvement Calculation Page 2 of 4 Design Methodology The aggregate fill thicknesses determined in the Results section below are based on the methodology prescribed in Giroud and Han (2004). The design method is intended for the calculation of the required unbound aggregate layer thickness for unpaved roads constructed on weak subgrades. Validation of the thicknesses achieved for pavement sections reinforced with Tensar biaxial geogrids using this method were achieved through calibration with several sets of test data including the results obtained from work undertaken in the pavement test facility at North Carolina State University (Gabr, 2001). Design Parameters a) Trafficking Requirements ' -t �- � Property Value / 1, t 1—') _ ern — Axle Load (kips) 25 r Tire Pressure (psi) 80 `� 1.9K Axial Passes (Each) MEE Maximum Rut Depth (in) 3.0 t b} Pavement Soil Properties �4- Property Value Aggregate Fill CBR ( %) 20 • Field Subgrade CBR ( %) 3 rThr--- o _ S rte, sty t C ` 4 This document was prepared using SpectiaPave2 Version 2 17 Developed by Tensar Earth Technologies, Inc. Copyright 1998 - 2006, All Rights Reserved Subgrade Improvement Calculation Page 3 of c) Geosynthetic Properties IN4 ( . 1 b &11-- • Parameter BX1100 BX129.&' ' Integrally Irirally Geogrid type formed, single fled, single layer , . layer • Rib shape Rectan/ Rectangular/ visrare square Rib thickness (in) z % r 0.03 0.05 Aperture stability modulus ' (m -N /degree) 0.32 0.65 • Junction efficiency (9'lo) 90 90 . . Aperture dime ions (in) - Machine ' ction 1.0 1.0 - Cross chine 1.3 1.3 J T , sadiustrnent factor 1.0 1.0 } r Results Required Aggregate Fill Thickness (in) 70 _..-- • 60 - Legend I Unr enforced J - 50 - - - -- - -_ -... .__ 1 - - -- -- Ten�ar BX1100 TenarBX1200 . { I 40 o l { 30 i- 1) .._. -. j.... F 0 c ,`4 l '1 v • v . \ o 1 0 = 00 0.5 1.0 1.5 20 25 3.0 3 5 4.0 ietd Subgrade CBR ( %) This document was prepared using SpectraPave2 Version 2.17 Developed by Tensar Earth Technologies, inc. Copyright 1998 - 2006, All Rights Reserved • Subgrade Improvement Calculation Page4of4 Aggregate Fill Thickness Savings Aggregate Fill Thickness (in) Aggregate Fill Thickness Savings Geosynthetic —r's — (in) • Calculated Required F (in) ( %) Unreinforced 5.22 6 r N/A N/A • — — �_._ - -- 4 --- -- -- - - -4-. __ _ — _ __2 • . - References 1. Gabr M. (2001) • Cyclic plate loading tests on geogrid reinforced roads. Research report to Tensar Earth Technologies Inc., N.C. State University 2. Giroud, J.P., and Han, J. (2004) Design method for geogrid - reinforced unpaved roads: Part 1 — Development of design method ASCE Journal of Geotechnical and Geoenvironmental Engineering 3. Giroud, J.P., and Han, J. (2004) Design method for geogrid - reinforced unpaved roads: Part I( — Calibration and applications ASCE Journal of Geotechnical and Geoenvironmental Engineering E ti L 0 P F This document was prepared using SpecraPave2 Version 2 17 Developed by Tensar Earth Technologies, Inc Copyright 1998 - 2006, All Rights Reserved. .. . , Ippl.,01,5,.: Mgv 1: iggWpgm A K I, a t, !YavwfltWes:. ; S:wl0WWnNI,VigAMVi iaw .,,,,,,. ,,ti all,„Guide?ifortEstinfatingsSubgradeSOJIAtrengtbsitFirte4rpmq0A904i,?,kaw- , timated Consistency by: Test by: Correlates to: •. Standard Dynamic Cone Penetrometer Shear Strength, Penetration ; (in./blow) c Li I R Value . 'eel Equipment/Visual lest (blows/ft.) , rSC,SM, SP CL i CH 1 (psi/ 1 tts0 1 .‘, ‘,- Man standing sinks J l I ._ 2 - -- -- ..: 1.7 <0.125 I - 3 inches -------- Man walking sinks a l ii)tt ') _ 3 i --- - - - - 1.,. - 3.D 0.125 - 0.25 <0.36 a i - - 3 inchos i \ . . ium Man walking sinks , 4 -8 - 2-- 2,6 - 3.5 - 69 a25 - 0.50 0.36 - 2.5 R - - I inch ' ;tiff Pickup truck ruts 8- 15 > 3.9 1 2.6 - 1.8 - 6.9 - 13.9 0.50- 1.0 2.5 - 6.8 1. - 1/2 - 1 inch 1_ .00dcki dump tnick I v Stiff 1 5 - 30 19 - 1 . 1 1 . 8 - 1 . 3 -.- 4.3 13.9 - 27.8 1.0 - 2.0 6.8 - 15.5 .-■ ruts - 1 - 3 inches onificant ruts from la rd Insi > 30 1 .2 - 1.1 1.3 - 0.9 4.3 - 2.1 ...- 1 7.8 > 2.0 > 15.5 loaded dump truck a , rk'n,:k , .' Atte! l'ortI,Ind ( t'rnctit A:.....00mion, I I. Duronl literaturv.' and \Ic( arthv, 1),3.■. id 1 , 1 , : , ,•11.rt.:).; m!-, kle, ;i1)1:,..: ,m,r i o1 ,101,1it. 197 ; Icr,.. Wchor, 1'er,on..11 t of1mm.miLahi,1120o1 , pi_ j',. citR c,,,,,•(,,i /1,, TO 2! Gloct, .tor (),.,, I Po,c1Prort ' Van 1111 ct a \i-11kr 12S ‘ La VIELLE GEOTECHNICAL, PC 2313 NE Alameda R EJEIVED Portland Oregon 97212 (503) 287 -0511, Fax 282 -7671 March 15, 2008 JUN 1 7 2008 Our ref: 04- 1943.001 Brian Pautz CITY OF TIGARD 9685 SW Carriage Way BUILDING DIVISION Beaverton, Oregon 97008 / ST � ,Uv (' —00 JO f RE: CONSTRUCTION MONITORING — ROCKERY WALLS 13270 SW MENLOR LANE TIGARD, OREGON In accordance of your request we have completed our monitoring of the rockery walls. The site is located at 13270 Southwest MenIor Lane, in Tigard, Oregon. Our observations and conclusions are presented below. The 2 rockery walls and the driveway ramp were constructed by stacking two to 3 foot diameter boulders against a cut face. These walls were designed for a maximum height of 10 feet above the surrounding grade. The areas in front and above of the wall were designed to be horizontal. Calculations for design of the wall are attached. The boulders were fresh black basalt. The boulders were stacked to create a wall face with an inclination of 1H:4V (horizontal: vertical). A perforated plastic pipe, 4 inches in diameter was installed behind in the lowest row of boulders. In our opinion the contractors completed the construction of the two rockery walls and the driveway ramp wall in substantial accordance with the project rockery wall designs and specifications. Sincerely, fv 1 LaVIELLE GEOTECHNICAL PC �`� r Craig C. LaVielle, PE/GE " �` Principal \ ';? ' P FILE 10 FOOT - Rockery Wall Design Calculations 04- 1943.001 13270 SW Menlor Lane, Tigard, Or. . _._... all Ht. Above Grade; 101feet (H) Unit Weight Basalt Boulders, pcf 140,pcf _ Surcharge: 0 :Boulders Size = Minimum 2ft diam Phi Angle: 32 degrees Soil Cohesion: 0 psf Retained Soil = Med Stiff Clay Silt Soil Unit Weight: 125 pcf (wt) Embedment Depth 0.5 feet (Ed) ... . batter of Wall Face: 4H:1V 14 degrees : Back Slope: _ Horizontal Rockery Wall Rotation: ' Ka for a 14 degree slope face 0,31 NAVFAC DM -7.2 pg.66 Resultant: :Pa = KaWt(H +Ed) ^2/2 = 2,136.09 lbs. Moment Arm: feet Ar = 1/3 H = 3.50 ft Driving Forces PaAr = ' 7,476.32 :ft -Ibs :Resisting Forces: wt(H +Ed)wd(H /4) = 11,576.25 ft -Ibs. Factor of Safety Against Over Turning = PaAr /RF = 1.55 OK Rockery Wall Sliding:: ,Soil Passive Case: ; Kp = •tan ^2(45 +phi /2) = 100.00: :Pp = (WtEd ^2 /2Kp) 1,562.50lbs. Soil Friction Coefficient: ' Fc < tan (friction angle) 0.5 Base Friction: (H +Ed)wt(width)Fc = 2,205.00: :Total Slidng Resistance at Base of Wall: Pp +Fb = 3,767.50,Ibs, ;Factor of Safety Against Sliding: P +Fb /Resultant = 1.76 OK i I Sliding Between 1st & 2nd Boulders: Boulder to Boulder Soil Friction Coefficient: Fc < tan (friction angle) 0.6' i ...... : Base Friction:..... Hwt(width)Fc = 462.00' Resultant w/ Surcharge Acting _ : _ .. ........ .......:....................... ........................ g... Act � on 1st Boulder 7 7.50 • Factor of Safety Against Sliding: _...__..-. y A gai ain_..... SSliding: (Fb) /Resultant = 1 5.96:OK • I • / ,�`i 1 �;, ry i 7 i • • • ROCK SIZE SCHEDULE (See note 3 below) ROCKERY WALL DESIGN D (FT) MIN. WT. (LBS.) TYPICAL SIZE (IN.) MAXIMUM WALL HEIGHT (H) = 9 FEET -near level backsiope 1 000 2a X 18 X 12 8 FEET-4 taII2H:1V backsiope • • 3 1,600 32 X 24 X 17 D is distance from base 24 X 23 X 23 of boulder to top of wall 5 2400 40 X 28 X 20 (D = H for toe boulder) 36X27X23 7 4.000 54 X 34 X 24 48X36X26 LEVEL TO 2H:1V MAX. SLOPE 9 5,000 60 X 48 X 36 • 72 X 42 X 30 DRAWING NOT TO SCALE COMPACTED SILT OR Elongate CLAY SOIL (12 TO ap B oulder V`~ D {varies) 18 INCHES THICK) II, ,�o• '°v °•v% °'" STABLE TEMPORARY CUT • 1:,c•-• • (SLOPE ANGLE VARIES) 4 +1 �o•�, . • 060 4 "-0 CRUSHED AGGREGATE LIGHTLY COMPACTED IN 12 INCH LIFTS c " 0.35H = r Toe Boulde 4 " -0 OR 1 1/2" -0 CRUSHED • AGGREGATE WITH NO MORE THAN 7% 5-ft min length FINES PASSING THE NO. 200 SIEVE, 12 IN. MIN. �.". >... LIGHTLY TAMPED i. "�♦ ".poi' ?!;, :. 1 41 ® 1 3 INCH MIN. DIAM. PERFORATED MIN. KEYWAY PLASTIC PIPE ADS HIGHWAY GRADE CONSTRUCTION NOTES: WIDTH = 0.75H OR EQUIVALENT 1. Keyway subgrade and embedment should be verified by GeoPacific Engineering, Inc. For walls supporting fill, an engineered fill should be overbuilt and then trimmed back so that the wall is constructed against a stable excavated face of compacted engineered fill 2. Rocks should have a cubical, tabular, or semi- rectangular shape that roughly matches the space created by the previous rock course. Rocks should be laid flat with the long dimension oriented perpendicular to the wall and extending towards the excavation face. Rocks should be staggered such that each rock bears on at least two rocks below and vertical joints are discontinuous Rock placement and wall integrity should be checked (by builder) by lightly hammering on the top of each rock with excavator bucket. 3. Minimum rock sizes for a level backfill condition should be determined using the ROCK SIZE SCHEDULE above, where D is the distance • from the base of the rock to the top of the wall. Rocks should be no smaller than 650 lbs. For sloping backfill, rocks should be 50% larger than the smallest size. 4. Voids greater than 6 inches wide where there is no contact between adjacent rocks should be chinked with a small rock. 5. Backfill behind the rocks should consist of a minimum 12- inch -wide sheet of 4 " -0 crushed aggregate with no more than 7% fines passing the U.S. Standard No 200 sieve. Backfill should be placed in 12 inch lifts and lightly compacted to an unyielding state as each course of rocks is placed. 6. Structures supported above the wall should either be at least 1.6H horizontal from the front base of the wall or footings deepened as determined by a geotechnical.engineer. This detail is applicable to the subject project only and should not be used for other projects. 7. 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