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Specifications si T o 2 aezi' - Orr - 0/ 7 7 S /_ v.VD K 3 P SEE JUNE 21, 2004, LETTER FOR MISCELLANEOUS BOULDER WALL DESIGN AND GRADING RECOMMENDATIONS. FALL PROTECTION NOT SHOWN; HOWEVER, OWNER SHALL CONSIDER FALL PROTECTION FOR TALL BOULDER WALLS.. Embed bottom row of boulders at least 1 foot below lowest adjacent grade. Bottom row should have a minimum boulder base width of 3 feet. Install geotextile over the drainrock blanket before placing topsoil, if any, over drainrock. Also, place geotextile up against 1/4H:1V fine- grained soil cutbank if w Crushed Rock re, :..,jr concrete slab /patio or w j pavement structure or footing 10: ' is adjacent to boulder wall. CO ' ; _ :` �∎ However, call Geotechnical 0o ' ' 12 •! A'�! Engineer first in order to ���t t! ' / \i • %� determine the effect of . ...:... o I L!1!� surcharge on the boulder I!! wall. - EN ' L 1/4H:1V INSTALL 4 -INCH PERFORATED DRAIN PIPE WITHIN CRUSHEDROCK DRAIN BLANKET (MINIMUM 12 INCHES THICK) AND CONNECT PIPE TO STORM DISPOSAL SYSTEM NOTES: 1. USE 1 -1/2 TON STONES (ABOUT 3 TO 4 FEET IN DIAM ETER, NOT ROUND), 2. USE CRUSHED DRAIN ROCK (TYPICAL SIZE OF 2 TO 4 -INCH, IN DIAMETER,WITH LITTLE, IF ANY, FINE SAND /SILT FRACTION), 3. EXCAVATEAND CREATE SLIGHT INWARD AND NOT TO SCALE -=- s - -• 1 - DOWNWARD SLOPED BENCH(NOT GREATER THAN = r "-.' " ° , FIVE DEGREES 'FROM HORIZO YAL)'IN'FIRM NATIV'E:`:'-- - BE/ir4 �f Oregon IF`4 �J�. ® 1M, C� , , 4, SOIL BELOW TOPSOIL/EXISTING FILL. CALL FOR SITE VISIT PRIOR TO PLACING FIRST ROW OF TYPICAL BOULDER WALL . BOULDERS. CROSS -SECTION (0 to 6 -foot height) 4. SELECT BOULDERSTO FIT "SNUGLY ". BREAK COMPACTED FILUNATIVE SOIL ROUND BOULDERSTO CREATE FACES TO AID THE JUNE, 2004 W -1878 FITTING PROCESS. DO NOT BUILD BOULDER WALL WEST COAST GEOTECH, VERTICALLY. Geotechnical Consultants FIG. 1 West Linn, Oregon SEE JUNE 21, 2004, LETTER FOR MISCELLANEOUS BOULDER WALL DESIGN AND GRADING RECOMMENDATIONS. FALL PROTECTION NOT SHOWN; HOWEVER, OWNER SHALL CONSIDER FALL PROTECTION FOR TALL BOULDER WALLS.. Embed bottom row of boulders at least 1 foot below lowest adjacent grade. Bottom row should have a minimum boulder base width of 4 feet. Use two stones wide, if necessary, to obtain minimum boulder width. Install geotextile over the drainrock blanket before placing topsoil, if any, over 1 /4H:1V drainrock. Also, place I-- Crushed Rock reIF14 r geotextile up against Lu L ri ,,,h S ; j1 fine- grained soil cutbank if 1\ V ��,,,,� ♦ , concrete slab /patio or co 0 .�,,,,•.;, ► ,ij� pavementstructureorfooting F- ' :" _ �, is adjacent to boulder wall. 41 I1 � ! ' l�!" . However, call Geotechnical 1--. J;Ol(+ Engineer firstin order to ��`�� d etermine the effect of i„:,`..� surcharge on the boulder 1/4H:1 V wall. INSTALL 4 -INCH PERFORATED DRAIN PIPE WITHIN CRUSHEDROCK DRAIN BLANKET (MINIMUM 12 INCHES THICK) AND CONNECT PIPE TO STORM DISPOSAL SYSTEM NOTES: 1. USE 1 -1/2 TON STONES (ABOUT3 TO 4 FEET IN DIAMETER,NOT ROUND), 2. USE CRUSHED DRAIN ROCK(TYPICAL SIZE OF 2 TO 4 -INCH, IN DIAMETER,WITH LITTLE, IF ANY, FINE SAND /SILT FRACTION), 3. EXCAVATE AND CREATE SLIGHT INWARD AND NOT TO SCALE ...,. _', � - --DOWNWARD-SLOPED BENCH(NOTGREATER THAN. • �._•..� - F- = w _ _ BEVLANff O�FF1`C� "S�II�LC�IN �, "° •. :..- - - FIVE DEGREES "'FROM`HORIZONTALIIN "FIRM; NATIVE., ..,�- ...,_...,....u.,,_. -� .., .:.....:.Y SOIL BELOW TOPSOILIEXISTING FILL. CALL FOR T Oregon SITE VISIT PRIOR TO PLACING FIRST ROW OF TYPICAL BOULDER WALL . BOULDERS. CROSS - SECTION (7 to 8 -foot height) 4. SELECT BOULDERSTO FIT "SNUGLY ". BREAK COMPACTED FILL/NATIVE SOIL ROUND BOULDERSTO CREATE FACES TO AID THE JUNE,2004 W -1878 FITTING PROCESS. DO NOT BUILD BOULDER WALL WEST COAST GEOTECH, VERTICALLY. Geotechnical Consultants FIG. 2 West Linn. Oregon APPENDIX A BOULDER WALL CALCULATIONS Boulder Wall Stability Calculations Pg 1 of 3 Project: Bevland Office I West Coast Geotech, Inc. Project Number: W -1878 Date: 6/19/2004 I 6 (Wall Height (feet) Figure 1: 0 to 6 feet Properties of Boulder Wall and Retained Soil 3 Boulder Diameter (feet) 1.25 Boulder Weight (tons) Number of Stones in Cross Section 1 Number of Stones in Bottom Row 1 Number of Stones in Second Row Number of Stones in Third Row Number of Stones in Fourth Row Number of Stones in Fifth Row Number of Stones in Sixth Row Weight of Crushed Rock Behind Wall Width of Crushed Rock Blanket (feet) Unit Weight of Crushed Rock (pcf) 22.66667 Wall /Soil Friction Angle (2 /3)Internal Friction Angle 0 Angle of Backslope (Degrees) Batter of Base (x Hor.: 1 Vert.) Ka= 0.282715 34 Internal Friction Angle of Retained Soil (degrees) 120 Unit Weight of Retained Soil (pcf) 0.5 Coefficient of Friction at base of wall (mu) 6000 Ultimate Soil Bearing Pressure (psf) Surcharge ( (Total Surcharge Pressure (psf) Additional Horizontal Force on Wall Additional Horizontal Force (pounds) Height from bottom of wall to Horizontal Force (feet) 1.68767 FS(sliding) FS >1.5? Yes 35.62932 FS(overturning) FS >2? Yes 2.55187 FS(toe soil bearing) FS >1? Yes 2351.217 Q(min) Q(min)>0? Yes 633.9993 Average Contact Pressure psf 9.463733 FS(ave. soil bearing) FS >3? Yes • Boulder Wall Stability Calculations Pg 2 of 3 Project: Bevland Office ( West Coast Geotech, Inc. Project Number: W -1878 Date: 6/19/2004 ( 6 Wall Height (feet) Calculation Page #1 Weight Moment Row Height x x1 =x +d /2 Count? W1 W 1'`x1 5000 8161.122 6th row 16.5 0.727234 2.227234 0 0 0 5th row 13.5 0.595009 2.095009 0 0 0 4th row 10.5 0.462785 1.962785 0 0 0 3rd row 7.5 0.330561 1.830561 0 0 0 2nd row 4.5 0.198336 1.698336 1 2500 4245.841 Bottom 1.5 0.066112 1.566112 1 2500 3915.28 2.526117 Batter of Wall (deg) 0.044075 Row Height x x2 =x1 +d Count? W2 W2 *x2 0 0 6th row 16.5 0.727234 5.227234 0 0 0 5th row 13.5 0.595009 5.095009 0 0 0 4th row 10.5 0.462785 4.962785 0 0 0 3rd row 7.5 0.330561 4.830561 0 0 0 2nd row 4.5 0.198336 4.698336 0 0 0 Bottom 1.5 0.066112 4.566112 0 0 0 Row Height x x3 =x2 +d Count? W3 W3 *x3 0 0 6th row 16.5 0.727234 8.227234 0 0 0 5th row 13.5 0.595009 8.095009 0 0 0 4th row 10.5 0.462785 7.962785 0 0 0 3rd row 7.5 0.330561 7.830561 0 0 0 2nd row 4.5 0.198336 7.698336 0 0 0 Bottom 1.5 0.066112 7.566112 0 0 0 Row Height x x4 =x3 +d Count? W4 W4 *x4 0 0 6th row 16.5 0.727234 11.22723 0 0 0 5th row 13.5 0.595009 11.09501 0 0 0 4th row 10.5 0.462785 10.96279 0 0 0 3rd row 7.5 0.330561 10.83056 0 0 0 2nd row 4.5 0.198336 10.69834 0 0 0 Bottom 1.5 0.066112 10.56611 0 0 0 Row Height x x5 =x4 +d Count? W5 W5 *x5 0 0 6th row 16.5 0.727234 14.22723 0 0 0 • 5th row ' 13.5 0.595009 14:09501 0 : • . .,- ,_.....p 4th row ........ 10.5 0.462785 13.96279 0 . ....... ..0 0 . - _ _. _ -- 3rd row 7.5 0.330561 13.83056 0 0 0 2nd row 4.5 0.198336 13.69834 0 0 0 Bottom 1.5 0.066112 13.56611 0 0 0 • Boulder Wall Stability Calculations Pg 3 of 3 Project: Bevland Office West Coast Geotech, Inc. Project Number: W -1878 Date: 6/19/2004 I 6 (Wall Height (feet) Calculation Page #1 Weight Moment Row Height x x6 =x5 +d Count? W6 W6 *x6 0 0 6th row 16.5 0.727234 17.22723 0 0 0 5th row 13.5 0.595009 17.09501 0 0 0 4th row 10.5 0.462785 16.96279 0 0 0 3rd row 7.5 0.330561 16.83056 0 0 0 2nd row 4.5 0.198336 16.69834 0 0 0 Bottom 1.5 0.066112 16.56611 0 0 0 5000 Total Weight (Ib) 8161.122 Total Moment (lb -ft) 1666.667 Total Weight per lineal foot of wall (Ib) 1.632224 Centroid Distance from toe (feet) Xc 2 Centroid Distance for Active Pre. Yp 25.19278 Wall Friction Angle #DIV /0I Backslope Angle 0.282715 Coefficient of Friction Rankine 1.559193 1 1 0.687303 0.559193 0.440807 Active Pressure 610.6642 P(total) =0.5 * k * UN.WT * (H) "2 + Ps *k *H 235.3312 F(wall)= P(total)sin d 1901.998 N =W + F(wall) Sliding 950.9989 F(resisting) =N (mu) lb 563.498 F(driving) = P(total)cos d lb 1.68767 FS(sliding) Note: FS >1.5? Overturning 1221.328 0 0 5280.613 M(resisting)= Xc W cosw + (Base)P(total)sin d lb -ft - 148.2098 M(applied)= [Yp[P( total ) - Pscosw- P(add)cosw] +Hcosw /2* lb -ft Pscosw +h(add)cosw *P(add)cosw]cosd 35.62932 FS(overturning) Note: FS >2? Soil Bearing 2351.217 Z55187 FS( bearing )= Q(allowable) /Q(max) Note: FS >1? = 1.354274 a =[ M(applied) - M(resisting)] /N "+ Base /2 feet • 633.9993 contact pressure psf - 1083.218 Q(max) =(N /(base)) *(1 +6e /Base) 2351.217 Q(min) =(N /base)) *(1 -6e /Base) Note: Q(min)>0? Boulder Wall Stability Calculations Pg 1 of 3 Project: Bevland Office West Coast Geotech, Inc. Project Number: W -1878 Date: 6/19/2004 ( 8 (Wall Height (feet) Figure 2: 7 to 8 feet Properties of Boulder Wall and Retained Soil 3 Boulder Diameter (feet) 1.25 Boulder Weight (tons) Number of Stones in Cross Section 1 Number of Stones in Bottom Row 1 Number of Stones in Second Row 1 Number of Stones in Third Row Number of Stones in Fourth Row Number of Stones in Fifth Row Number of Stones in Sixth Row Weight of Crushed Rock Behind Wall Width of Crushed Rock Blanket (feet) Unit Weight of Crushed Rock (pcf) 22.66667 Wall /Soil Friction Angle (2 /3)Internal Friction Angle 0 Angle of Backslope (Degrees) Batter of Base ( x Hor.: 1 Vert.) Ka= 0.282715 • 34 Internal Friction Angle of Retained Soil (degrees) 120 Unit Weight of Retained Soil (pcf) 0.5 Coefficient of Friction at base of wall (mu) 6000 Ultimate Soil Bearing Pressure (psf) Surcharge Total Surcharge Pressure (psf) Additional Horizontal Force on Wall Additional Horizontal Force (pounds) Height from bottom of wall to Horizontal Force (feet) 1.456599 FS(sliding) FS >1.5? No, but close enough 14.51199 FS(overturning) FS >2? Yes 3.555653 FS(toe soil bearing) FS >1? Yes 1687.454 Q(min) Q(min)>0? Yes 972.7889 Average Contact Pressure psf 6.167834 FS(ave. soil bearing) FS >3? Yes Boulder Wall Stability Calculations Pg 2 of 3 Project: Bevland Office I West Coast Geotech, Inc. Project Number: W -1878 Date: 6/19/2004 I 8 (Wall Height (feet) Calculation Page #1 Weight Moment Row Height x x1 =x +d /2 Count? W1 W1 *x1 7500 12737.52 6th row 16.5 0.727234 2.227234 0 0 0 5th row 13.5 0.595009 2.095009 0 0 0 4th row 10.5 0.462785 1.962785 0 0 0 3rd row 7.5 0.330561 1.830561 1 2500 4576.402 2nd row 4.5 0.198336 1.698336 1 2500 4245.841 Bottom 1.5 0.066112 1.566112 1 2500 3915.28 2.526117 Batter of Wall (deg) 0.044075 Row Height x x2 =x1 +d Count? W2 W2 *x2 0 0 6th row 16.5 0.727234 5.227234 0 0 0 5th row 13.5 0.595009 5.095009 0 0 0 4th row 10.5 0.462785 4.962785 0 0 0 3rd row 7.5 0.330561 4.830561 0 0 0 2nd row 4.5 0.198336 4.698336 0 0 0 Bottom 1.5 0.066112 4.566112 0 0 0 Row Height x x3 =x2 +d Count? W3 W3 *x3 0 0 6th row 16.5 0.727234 8.227234 0 0 0 5th row 13.5 0.595009 8.095009 0 0 0 4th row 10.5 0.462785 7.962785 0 0 0 3rd row 7.5 0.330561 7.830561 0 0 0 2nd row 4.5 0.198336 7.698336 0 0 0 Bottom 1.5 0.066112 7.566112 0 0 0 Row Height x x4 =x3 +d Count? W4 W4 *x4 0 0 6th row 16.5 0.727234 11.22723 0 0 0 5th row 13.5 0.595009 11.09501 0 0 0 4th row 10.5 0.462785 10.96279 0 0 0 3rd row 7.5 0.330561 10.83056 0 0 0 2nd row 4.5 0.198336 10.69834 0 0 0 Bottom 1.5 0.066112 10.56611 0 0 0 Row Height x x5 =x4 +d Count? W5 W5 *x5 0 0 6th row 16.5 0.727234 14.22723 0 0 0 • .. :- 5th row :. • 13.5 0.595009 14.09501 • 0 :,, ,.:. O. ,. . , 0 :. .. ... -,,, :: , .. ., 4th row`; '.. , , 10.5 0.462785 1196279 0 ,- '::..0 , .:.0 . , : , ., ,., ' .._, �....: , ._ _ , : , , . ,- 3rd row 7.5 0.330561 13.83056 0 0 0 2nd row 4.5 0.198336 13.69834 0 0 0 Bottom 1.5 0.066112 13.56611 0 0 0 • Boulder Wall Stability Calculations Pg 3 of 3 Project: Bevland Office I West Coast Geotech, Inc. Project Number: W -1878 Date: 6/19/2004 I 8 (Wall Height (feet) Calculation Page #1 Weight Moment • Row Height x x6 =x5 +d Count? W6 W6 *x6 0 0 6th row 16.5 0.727234 17.22723 0 0 0 5th row 13.5 0.595009 17.09501 0 0 0 4th row 10.5 0.462785 16.96279 0 0 0 3rd row 7.5 0.330561 16.83056 0 0 0 2nd row 4.5 0.198336 16.69834 0 0 0 Bottom 1.5 0.066112 16.56611 0 0 0 7500 Total Weight (lb) 12737.52 Total Moment (lb -ft) 2500 Total Weight per lineal foot of wall (lb) 1.698336 Centroid Distance from toe (feet) Xc 2.666667 Centroid Distance for Active Pre. Yp 25.19278 Wall Friction Angle #DIV /0! Backslope Angle 0.282715 Coefficient of Friction Rankine 1.559193 1 1 0.687303 0.559193 0.440807 Active Pressure 1085.625 P(total) =0.5 * k * UN.WT * (H)A2 + Ps *k *H 418.3666 F(wall) = P(total)sin d 2918.367 N =W + F(wall) Sliding 1459.183 F(resisting) =N (mu) lb 1001.774 F(driving) = P(total)cos d lb 1.456599 FS(sliding) Note: FS >1.5? Overturning 2895.001 0 0 5098.236 M(resisting)= Xc W cosw + (Base)P(total)sin d lb -ft - 351.312 M(applied)= [Yp[P( total ) - Pscosw- P(add)coswj +Hcosw /2* lb -ft Pscosw+h(add)cosw*P(add)coswlcosd 14.51199 FS(overturning) Note: FS >2? Soil Bearing 1687.454 3.555653 FS( bearing )= Q(allowable) /Q(max) "' Note: FS >t?- "' °' - 0.367328 e= M a lied M resistin /N + Base /2 feet 972.7889 contact pressure psf 258.1238 Q(max) =(N /(base)) *(1 +6e /Base) 1687.454 Q(min) =(N /base)) *(1 -6e /Base) Note: Q(min)>0? !.a RECE • U 3 2° CITY of TIGARD t BUILDNGDI T1T 0 N ®� 1 x m r. CO Dm NmN g NX O • o _o - I g ® x Cn U) \ O y 0 ITI o+� z n x r— �\a 1 ® 1 � 1 11 N c! O O z l e 0 mxm(7 N - l�Z N a- I Z N m > t D DN' Z = 0 P C —1_, = 0 C) D r rn II 8/3/04 o BEVELAND OFFICE BUILDINGS SITE PERMIT #s SIT2004 -00015 & SIT2004 -00014 "Building & Designing Fine Living & Work Space Since 1988" 12439 S.W. 22nd Ave. ® Lake Oswego, Oregon 97035 o Voice 503.293.1226 • Fax 503.293.1536 • www.diversifiedconst.com m CCB# 0103025 0 N -n z { m m 6' -0 MIN. i r r 2 ._ 0 , m 0 —I at r 1 Z L J OO A 2rn N 0 b mSY2 O X X (nN X A N N 1 N D UI D^ m � � - I D m ®off p 1 g I A 4r-13.§1. NZ Z? rn v x Dy . A ®x r• C1 D y = N \ to O -i 2 ON O _ Z inv Z O U, CI 3. r rn w u 1 8/3/04 q BEVELAND OFFICE BUILDINGS SITE PERMIT #s SIT2004 -00015 & SIT2004 -00014 "Building & Designing Fine Living & Work Space Since 1988" 12439 S.W. 22nd Ave. • Lake Oswego, Oregon 97035 • Voice 503.293.1226 • Fax 503.293.1536 • www.diversifiedconst.com • CCB# 0103025