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HomeMy WebLinkAbout07/01/1997, C-2 - SUBMITTAL OF ENGINEERING STANDARDS FOR ADOPTION. jcouncil °-; , Iyq7 acEnba Report -% CITY OF SAN LUIS OBISPO FROM: Michael D. McCluskey,Public Works Direc " Prepared by: Barbara Lynch,Civil Engineef SUBJECT: Submittal of Engineering Standards for Adoption. RECOMMENDATION: Adopt Resolution Approving Engineering Standards for Construction Projects. DISCUSSION: From time to time staff reviews the standard drawings used in constructing facilities. Changes to these standards are made if wan-anted. The standard drawings are made a part of city projects and provided to the public to use in their projects. The City's Engineering Standards are used in conjunction with the California State Standard Drawings. Our standards reflect work which is unique to the City or not adequately addressed by the State. It is important that the City Council approve all standards used in projects. The act of Council approval allows the City protection under the law from future claims of damage that may be attributed to the improvements constructed using these standards. The legal term for this protection is "Design and Plan Immunity." In 1995 the Council adopted Resolution No. 8413 approving the Engineering Standards. At the same time, Council adopted Resolution No. 8414 authorizing the City Engineer to make minor changes to the Standards without Council approval. This allows quicker response to changing conditions. Staff has recently created new standards and modified some of the existing standards. Out of a current total of 120 standards, 25 were modified. The changes reflect modifications of current practice and state-of-the-art techniques in the design and construction of facilities, and combining of standards. Combining of some standards reduced the number of standards to be maintained by 21, while providing the same information. Of the 25 modified, staff felt that 4 were significant enough to bring to the Council for adoption, in part because they will have some impact on private development. Typical of the types of new items added to the standards are: well metering, bus turnouts, and fire protection devices. Significant revisions to the standards for adoption are: revised parking and driveway standards to provide more room for trees, requiring a Fire Department Connection and monitoring device at fire hookups and requiring contractors rather than staff to perform manhole testing. The revised standards and some of the new standards have been in use over the last year on individual City projects, receiving Council approval as part of the approval of plans and specifications. This has improved clarity and consistency during construction. CONCURRENCES: The Utilities Department has reviewed all new and revised standards pertaining to utility work Public Works Department staff have done the same. Al-/ i MCAL MPACTS: No sigpificant fiscal i npgcts are foreseen. Attachment§: Resolution New and Significantly:revised standards COWPkte Eagineering.Standar&amavailable in.the,Council.Office for inspection �19ss_mmroussli+sgs161ynchlatydoaVdopt me sl_a v7_aoe. RESOLUTION NO. (1997 Series) A RESOLUTION OF TBE COUNCIL OF THE CITY COUNCIL OF SAN LUIS OBISPO APPROVING ENGINEERING STANDARDS FOR CONSTRUCTION PROJECTS AS PREPARED BY TBE ENGINEERING DIVISION OF THE PUBLIC WORKS DEPARTMENT WHEREAS, the Engineering Division of. the Public Works Department is responsible for periodically updating the Engineering Standards, and WHEREAS, the Engineering Standards are necessary to ensure that public works facilities are designed and constructed to minimum acceptable standards to protect the health, safety and welfare of the public, and WHEREAS, legally adopted Engineering Standards are necessary to provide "design and plan immunity" thereby protecting the City from possible liability, and WHEREAS, the Engineering Division has completed a revision of the current Engineering Standards, NOW, THEREFORE, BE IT RESOLVED that the City Council of the City of San Luis Obispo, California hereby: 1. Approves the City Engineering Standards attached hereto marked Exhibit "A" , to be included in a booklet prepared by the Engineering Division of the Public Works Department setting forth City Engineering Standards for design and construction of public works projects. 2 . Authorizes the Public Works Department to prepare and 6014 3 . Authorizes the City Engineer to make minor modifications to the Engineering Standards under the provisions of Resolution No. 8414 (1995 Series) . Upon motion of seconded by and on the following roll call vote: AYES: NOES: ABSENT: the foregoing Resolution was passed and adopted this day of 1997 . MAYOR ALLEN SETTLE ATTEST: CITY CLERK APPROVED AS TO FORM: T TT ME ........... Oi� pb ,�40' AI Arz I -,r1g. I Id IN. Nol Zj W ZA rry SS ROM --.,0 - 'MM®R &P.Rgl PE� 5R, I Foy Z- R"M M"i tlpI. -1 1 —50 '41 'MS zi V1.h 1.5,01, 1 "0, IF, 'Mi-it--N-o "'N'- -ji HIM RM" -i+rwq:` 1�+•N ve•+,�(.-�"N ip�+�� � F'�r'Y'w'Xk -7y+. i o-+, tt r`�,.�'s•:�F"^SSy .e. A f i. '�9`•? +4A..�,e. c tit .2"` Ya�'r;.� ' t' > �s .� gg - M1,51R.,WE I'lIl 0��V`cs-M, -4,*1 , � of ,Cl" Y- � � o-:.: -'� `J(:.4�a�ip�^�3 rk R�,�-7 v .<.�"`•.F�"�..t' Z. -t�II 11:11s, 11i 111111!!111'IIII!jI BUS POCKET DIMENSIONS FOR BUSES 2.6 METERS WIDE AND ELEVEN (11 ) TO TWELVE (12) METERS LONG 11 FEEDER LINE, ONE BUS — 18 9 TRUNK LINE, TWO BUSES — 31 roadway sidewalk BUS PADGN O FEEDER LINE, ONE BUS and TRUNK LINE, TWO BUSES BUS STOPPOST SIGN& 31 g BUS PAD "P" SIGN POST & BUS STOP SIGN TRUNK LINE, TWO BUSES (Intersecting Road or Driveway as Entrance) Z z W U ZU F ` C NOTES: ®I 1 . Reinforce 3m wide bus pad within �I O R_8 AQ pocket due to bus weight. 200mm R=s ID concrete with #10 @ 500mm o.c. - — — — reinforcing. 150mm A.B. Class 2. � L1 L2 L2 L1 2. Curb height 200mm maximum due to needed clearance for wheelchair L lift operation. 3. See Engineering Standards #4030 & L L1 L2 I A e C D E #4110 for Curb, Gutter and Sidewalk. 11 1.2 1.1 2.6 2.5 0.1 4. See Engineering Standard #4910 for 9 2.0 1.5 1 2.6 2.3 0.3 sawcutting existing PCC. 5. See Engineering Standard #7220 for REVERSE TAPER — GEOMETRICS "P" Sign Post. DIMENSIONS IN METERS UNLESS OTHERWISE NOTED. APPROVED BY CITY ENGINEER DATE Limy of WagQgp�lil . 1 san CONCRETE REVISIONS BY APP DATE 1 u�s BUS POCKET New St¢nd¢rd JDL WAP 6-97 L OB'SPO June 1997 Edition 4920 d-62-4 STANDARD CONFIGURATION ALTERNATE CONFIGURATION (must be approved by the Utilities Department) WELL WELL 3WTERAMETER BUILDING BUILDING ox SERVED I SERVED REMOTE READER ROW SIDEWALK WATER METER BOX General Notes: Construction Notes: All commercial buildings served by public sewer and private well For properties receiving water from both a private well and the shall have the well metered for the purpose of assessing sewer public em, on approved charges• installed the serie on ectofnatopt�ention devise shall be public system. The well meter shall consist of a conventional meter set in the The proposed location of the water meter and remote reader public right of way in accordance with City Engineering shall be approved by the City Utilities Department prior to Standards. With prior written approval of the Utilites Engineer, installation. a meter set near the well with a remote reader mounted to the building or other permanent structure will be allowed. The meter and related facilities shall be installed in accordance with applicable City Standards. The meter box shall be set with The Property owner shall pay all fees established for these the long dimension parallel to the curb to differentiate them purposes. from other meters. The Property owner shall execute a Private Well Metering A conduit and pull rope shall be installed in accordance with the Agreement with the City for ongoing operation, maintenance, NEC and City Specifications and Standards. The conduit shall inspection, calibration, and repair or replacement of the well enter the water meter box in such a manner as to not interfere meter and related City facilities. with the installation, removal, and inspection of the meter. The conduit shall be stubbed up at the building and secured to the If a property receives water from both the public system and a building at no less than two locations. Both ends of the conduit private well, the customer will pay a sewer charge based on shall be capped with a slip cap, not welded or glued. usage from both meters and a water charge based on usage from the public system meter. A space shall be provided to allow the remote reader to be The City shall own, operate and maintain the meter, remote securely mounted at 1.5 m above grade. reader and associated wiring. All other facilities shall be the All work shall be performed by an appropriately licensed responsibility of the property owner. contractor with the exception of the meter set, pulling of remote read wires, and installation of a remote read unit which will be completed by City crews with a 48 hour notice. N. Curb stop Sidewalk o Remote reader Angle meterr stop mor Caller Meter box gH.amr�wire Water meter Per NEC 1 5m 19mm Conduit Meter box Schedule 60 90 sweep Customer valvennection d conduit Per NEC 90 sweep SEE Eng. Std. 6210 FOR DETAILS APPROVED BY CITY ENGINEER DATE crc r Of REVISIONS BY APP DATE san WELL METERING Lws New Standard BL WAP 4-97 OB'SpO April 1997 Edition /6240 6:-J-7 • e a • • a a a SSE c c The bypass shall be as C D a I close to the Liu meter body as feasible. ❑ o O L liez 9 ° METERS a O Q y e e C e e a e e © © o a NOTES: METERS (Centered in vault A MINIMUM OF 8 PIPE DIAMETERS OF STRAIGHT METERS TO BE SUPPORTED AS SHOWN PIPE MUST PRECEED THE INLET FLANGE Compound meters with 50mm bypass: QA Service Saddle — Jones J797, CC x 200mm Hersey Model MCT II — 80 to 150mm QB Isolation Volve — Gate valve, resilient seated Hersey Model MCT — 200mm with fully encapsulated gate, FL x MJ Sensus Model SRH — 80 to 150mm © Corp Stop — 50mm, Jones J1944 Badger — 80 to 150 mm QO Ball valve — 50mm, Jones J1900W Turbine meters with 50mm bypass: QE Copper tubing — 50mm, type K. soft, Turbine be used only with written supported at 300mm intervals Y Y permission from Utilities Engineer) t�F 1/4 bend — sweat x sweat Hersey Model MHR — 80 to 250mm with approved strainer © Sensus Series W — 80 to 250mm with approved strainer MIP x sweat Badger Record All II — 80 to 250mm with approved strainer Q Union Q FIP x sweat Fire Service Assemblies with 50mm bypass Hersey detector water meter Model MFMII — 80 to 250mm Q See Engineering Standard #6270. Sensus Compact Fire Line Assemblies — 100 to 250mm PCC pod with jacks — .05 cubic meters set to grade 150mm of 19mm loose aggregate APPROVED BY CITY ENGINEER DATE cityOf IQ1111111111�11 san WATER METER REVISIONS BY APP I DATE A LUIS WITH UNMETERED BYPASS New Standard BL WAP 5-97 80 mm & larger SR BL 1 6-97 OBISPO June 1997 Edition 6250 METER VAULTS Meter Size Meter Type Vault Type Vault Cover 5C°O Vault Size mm mxm 200 to 250 Compounds, Turbines & Brooks Products 800 Spring assisted hinged 3 x 1.8 Fire Service Assemblies Series or approved cover with reading lid equal 150 Compounds, Turbines & Brooks Products 800 Spring assisted hinged 2.4 x 1.8 Fire Service Assemblies Series or approved cover with reading lid equal 75 to 100 Compounds, Turbines & Brooks Products#757 Spring assisted hinged 1.5 x 2.1 Fire Service Assemblies or approved equal cover with reading lid NOTES: • Where spring assisted covers with a reading lid are not available,multiple covers with a reading lid may be substituted. The multiple lid shall be rated for single person lifting. • Vault covers shall be either pedestrian rated for sidewalk areas or traffic rated for driveway and street areas. • Vault covers shall be a minimum of 10 mm thick steel with lift mechanism. • Vault cover shall be furnished with a reading lid. • Vault covers shall have a non-slip surface. • Spring assisted vault cover lids shall bolt down. Multiple lids shall not be bolt down. • Vaults shall be positioned in relation to the face of curb as shown in Eng. Std 6430. 1PPROVED BY CITY ENGIITEER DATE � III IIIII����� Illi METER VAULTS REVISIONS, /� 80 to 250 mm New Standard ` n� 0 C+'y � ` Us ompo May 1997 Edition 6270 A02- f 600 mm 45C 900 mm min. Tnir. — ax. Exterior wall PVC or equal spacer to provide 50 mm clearance between riser E & concrete slab 17;�l1E 1LlI EaIFIIFIIIJI d•• 50 mm min. IIIIII III—IILI IJI11-111 I `III minIII-111—IILIII^I' o » �F�FI IF I I —I IF I I L—III=11 L—�rI�I I FI I1�11=I I='c'r— E d =14I� �IIII�n I-IILIIE11Wrap pipe with (2) layers of o11" �I . . , IIrIFI�I II I-1 ' plastic tape (min. 3mm) "-"'— .II II D. I. spool (height as required) to o Tiffin IFI I" E -- �I=111=11 C11 ITi=il=li IICI�ri=llCnr...—,n_In Locator tape from street valve E to sprinkler riser 00 300 mm min sand cover Stainless steel bolts or coat all rn expospd ,polts & threads with Henrys 204 plastic roof cement d =1,or an approved equal. • I=11 =1I F . 100 mm sand bed '• III=1 - .. �... . . . . . . . ... •: .' ^• . 111=111- 1II I—III 111- =1 1 1-=11 q P. C. thrust block as required I 1=111=I F'I 11= II III=III D. I. spool length as required UL listed Flanged Coupling Adapter fitting (PVC to D. I.) or an approved equal UL Ilisted fire main class 200 PVC or on approved equal Fire line shall be tested in accordance with the Section 76, "WATERLINES" of the City Standard Specifications. NO CONNECTION MAY BE MADE UNTIL WATER SAMPLES HAVE BEEN TESTED AND APPROVED. APPROVED BY CITY ENGINEER DATE My or immmmoolom SdYl FIRE MAIN REVISIONS BY APP DATE , 1>�S Building Connection New Standard SR WAP 5-97 OBa ISPO May 97 Edition 6590 �,Z/D An approved break-away pod-lock. or changable combination tock (Keys or combination to be located O fire sprinkler riser & Knox box.) Break-away metal caps or brass caps. 600 mm min. - 3 m max. conduit connector 90' FDC face towards street or fire lane (2) FDC connections< 1890 Lpm IJS. Xst�d)post indicator valve > 1890 Lpm provide (4) FDC Stainless steel band clamp for E support of conduit to PIV or O approved equal. o m UL listed tamper device wit I U. L fisted single check assembly tamper proof screws. E Min 100 mm dia. or larger DJ. spool 19mm min. liquid tight conduit. m wrap pipa with (21 layers of UPC listed m plastic tape min mm thickness or coat with Henrys #204 plastic roof u�i E cement or approved equal. IB Min. bury fine per manufacturer - 19mm sch 40 PVC rigid conduit D.I. to for low voltage 750 mm min. - 900 mm min. Transition fitting mechanical joint O panting or driveways to PVC as regwrc . < - Sand bedding.fill�too `mm mlTl.. FR I ..^'�.� 'longe Coupling aper ifte Min. 100 mm dia. class 200 PVC for fire main use. Min. 100 mm dia. Class 200 Flange tea PJC for fire mein use. Concrete thrust block Locating tape to building riser UL listed single check assembly w/ 2 testing plug, Fl i Fl from street valva. Coat all exposed bolts & threads w/ Henry's (1204 19mm min. gehl 40 rigid wirincondg plastic roof cement or an ed equal. for low voltage Tiro alarm wiring P aPPrm' q fisted for wet location. PIV AND FDC LOCATIONS MUST BE APPROVED BY FIRE DEPARTMENT APPROVED BY CITY ENGINEER DATE My I Or 'Iy POST INDICATOR VALVE REVISIONS BY APP DATE , & FIRE DEPT. CONNECTION New Standard SR WAP 5-97 lul VBIC„O May 97 Edition 6580 ��a minimum ht 300mm above highest R outlet or water level. IJjM fF - 600mm METER max 3.Om Max. PRESSURE VACUUM BREAKER For irrigation only For potable water only, 19 to 50 mm NOTES: 1. Use GI pipe and fittings. Resilient seated shut off valves and test cocks are required. 2. The mechanical backflow prevention assembly shall be installed subject to the approval of the County of San Luis Obispo Cross Connection Inspector. Any deviation from this standard.must receive approval prior to installation. 3. All mechanical backflow prevention assemblies approved by the County Cross Connection Inspector for installation at the service connection have been evaluated and approved by the Foundation for Cross—Connection Control and Hydraulic Research, University of Southern California. These assemblies are only approved for the horizontal orientation, unless specifically evaluated and approved by the local Health Department for other orientations. Check with the local Health Department. 4. Choice of type of backflow prevention assembly, i.e. reduced pressure principle or double check valve assembly, will be based on the degree of hazard as evaluated by the County Cross Connection Inspector. 5. No connections or tees are allowed between the meter and the assembly. APPROVED BY CITY ENGINEER DATE CTLY Of REVISIONS BY APP DATEm BACKFLOW ASSEMBLY New Standard BL WAP 5-97 =t2 JUIS Pressure Vacuum Breaker OBISPO May 1997 Edition 6570 e-sem SYMBOLS: ® Reflector ® Z- Hydrant � 530m d 0 E3 F� E3 100 mm a (typ) 5_30 m ® y >30 m --! >30 m TWO WAY STREET ®I ONE WAY STREET NOTES: A. Reflectors shall be 2—way blue reflective markers and shall conform to the standards set forth for reflective morkers by the State of California Department of Transportation. B. Reflectors shall be set on the hydrant side of the centerline. C. When hydrants are within 30m of an intersection, a marker shall be placed on the cross street as well. D. Reflectors shall be set behind the pedestrian crossing area at an intersection. E. Reflectors shall be cemented to the pavement in accordance with the requirements of Section 85, PAVEMENT MARKERS' of the State of California Department of Transportation Standard Specifications. APPROVED BY CITY ENGINEER DATE Cmy of REVISIONS BY APP I DATE '011110011 san HYDRANT REFLECTOR New Si=dwrd BL WAP 11-96 IDIS OBISpo November 1996 Edition 7920 C-s-✓3 ^' ` •tom. '' .a� 4`"�"�y�,n;�, ��ytG ��c y � ,m ti_,�/� >y�'t'N.'.y�77''���;r r r��,. f :� ."�,`rs'r� � .K 4� ��� { �.'�� °.r�a' 'v.;,,,Yr�,j�� 4' V •��h�,rbi':� .,t �.>W r�i;sj�i' r6 '� � .y.. 'r��o�� � %�': �r'��r!'� 7 x,�trr ' $ •,va�to#:. 4 }:r y�w�����y�q�g,r. x i Y��;!1� '�, �� S,. ��I.�.¢��K��� 1 "h` r 1 +� +No�...'r -Sl r ° "r - ♦ a v7t' i v�.. -yt T k � ^L. �' '�y �.. 'L�,. :�.�, aa�i-w.�e 'S..Zk[h[�1��ar 'y�t ���G t„ t�,^".}eS� ��5v� S° r r� 'n �cv'�S '�," t ..'�w-• v '��. r r A -* a�a5 i` 3'C }'i � '�, f ✓`; w�'(rC �y s Ga 1'� ��Q .� r� e. �l. +a �y 'C S,.'., -. �f .q. .f R• � "�v r,• �r�y1Y�.j Y4Fir .l' ti�v,�p t I rJ' 7 d f"p1 } �.✓ ! a::j(.C'Sj�'iY'...tYl". r �� .�f 0 l+. 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Screening "- L In Large Parking Lots: Any parking lot with more than six parking spaces adjoining a street shall have the street frontage screened with a 1 meter (minimum) high wall, fence, hedge consisting of 20 liter or larger plants, or landscaped berm. The area between such screen and the street shall be landscaped. 2. Near Residential Development: A panting lot on a site adjacent to a residential development or next to a residential zone shall be screened by a solid 2 meter high wall,fence,or an existing mature hedge. L Landscaping 1. Planting Area Placement: In all parking lots planting areas shall generally be provided after each six parking spaces in any row and at the ends of each row of parking spaces in order to encourage the use of trees in parking areas. Landscape areas shall have a minimum dimension of 12 meters; except, those area with trees shall have a minimum dimension of 2.4 meters. Landscape areas shall be defined by concrete curbing designed to minimise damage to pavement caused by irrigation of landscaping. Landscape areas defining ends of rows shall extend to the minimum inside tum radius, shall not conflict with an aisle or back-up area, nor be less than 12 meters in width. (Exceptions to this provision may be granted by the Community Development Department or the Architectural Review Commission.) 2. Planting Arrangement: In order to prevent large expanses of pavement, parking lots shall have at least 5 percent of their surface devoted to landscaping(exclusive of setbacks)arranges in an appropriate and effective manner. Additional landscape area may be required by the Community Development Department or the Architectural Review Commission. 3. Maintenance: In all zones, required street yard areas shall be landscaped and perpetually maintained All landscape planting shall be maintained and dead plants shall be replaced as necessary. Drought tolerant planting must be used in accordance with the city's landscape standards for water conservation. 4. Irrigation: Drought tolerant planting must be used in accordance with the citys landscape standards for water conservation. Landscape areas shall have a permanent underground irrigation system_ Irrigation shall provide uniform precipitation for overhead areas and adequate water to maintain healthy plants. Check valves are required at the toe of all slopes to prevent low head drainage. \PPROVED BY CITY ENGINEER DATE �IIIIIIIIIIIIIIIII IIIIII 1111111 PARKING AND DRIVEWAY MEREM=1 STANDARDS REVISIONS: C'Y�1 10 J-/ S ` AS INDICATED IN BOLD LwS OBISPO Ma=ch 1997 Edition 2010 page 4 F�p/C m face towam�adYs�fan Irma or strsot SIZE Mac PAD to pod lack & chain bat so pfom�mot�kaecapmar cow' Masa or equal t00mm 68Smm 2.srn & chain batwmn OS&Y valves lacked FOC can be used up to 1990 L/minuts. 1T3_01. 760mm 2.7m N aper Position. For each 950 L over odd an an FDC. 200rmm 640mm 10m pipe drainage signage 250mm 915inm 111M Tamper device for mon9mtng eeeh os&Y valve. Ali fittings & rlmre should be UL listed single ductile bon pipe (eternally ammant 9nned for fire service). 8 unetlon box with HEIGW 150 mm die. (Clam 200) or larger R I Ctannisor proof screws Min. 75 mm flex liquid light 150 mm conduit seared to bots. 100 mm ' 19mm min. Sch. 40 rigid Bond for law "Hoge fire alarm wiring Ibted for wet kxas8on. WATER MAIN E F ; Meter---// eter 600 mm Customer valve mse` 3.0m coat an baits & fhraoda NOTES: come""°�Pprom Plastic fad cammt or an a 1. Up to 100mm, use GI pipe and fittings. Resilient seated shirt off valves and test cocks are required. O.S.&Y. gate valve with fully encpsulated 2. For 19mm and 50mm lines, the customer valve in resilient seat — Dresser, Kennedy or approved the water meter box shall be eliminated. equal conforming to latest edition AWWA standard C509 3. The mechanical backflow prevention assembly shall be ® U.S.C. approved double detector check valve installed subject to the approval of the County of San flow preventer assembly with 19mm back Luis Obispo Cross Connection Inspector. Any deviation non—valved bypass meter assembly. from this standard must receive approval prior to installation. © All risers and above ground mainline fittings 4. All mechanical backflow prevention assemblies shall be flange type. approved by the County Cross Connection Inspector for ® PCC pad 300mm minimum around risers, installation at the service connection have been Class 3. evaluated and approved by the Foundation for Cross—Connection Control and Hydraulic Research, ® MJ x Flange adaptor University of Southern Colifomia. These assemblies are only approved for the horizontal orientation, unless ® PCC thrust blocks, Class 3. specifically evaluated and approved by the local Health Department for other orientations. Check with the local Health Department. 5. Choice of type of backflow prevetion assembly, i.e. reduced pressure principle or double check valve ANY MODIFICATION TO FIRE DEPARTMENT assembly, will be based on the degree of hazard as REQUIREMENTS MUST HAVE WRITTEN evaluated by the County Cross Connection Inspector. APPROVAL FROM THE FIRE DEPARTMENT. 6. No connections or tees are allowed between the MAY BE USED IN LIEU OF SEPARATE meter and the assembly. DOUBLE CHECK ASSEMBLY 7. No wye strainers are allowed before the No. 2 shut AND DETECTOR CHECK IN SERIES. off valve. APPROVED BY CfIY ENGINEER DATE Moor DOUBLE CHECK DETECTOR CHECK with FDC REVISIONS BY APP I DATE MAE San S BACKFLOW PREVENTER eau Requirements SR WAP 5-97 mob-28 lulOBI 100 to 250 mm FDC SR WAP 5-97 �� May 97 Edition 64200 d-J 16 COVER: Manhole frame and cover shall have a 600 mm clear opening and a sealed blind pickhole (SBF-1900 or approved equal). The cover shall be lettered "SANITARY SEWER The inside of the frome shall be grouted with non—shrink grout. ADJUSTMENT TO GRADE: Adjust to grade per City Engineering Standard #6040. COLLAR: Collar shall be constructed per City Engineering Standard #6040. CONE: Cone shall be concentric end conform to the requirements for risers. Eccentric cones may be used only in special cases with the prior written approval of the Utilities Engineer. '.r17 MANHOLE RISERS: E E Manhole risers shall be precast concrete conforming to ASTM C-478, and 600 mm E a shall have o 150 mm min. wall thickness with minimal reinforcements. Manholes shall be 1.2 m in diameter unless the size and/or number of inlet(s) and outlet(s) warrants the use of a 1.5 m diameter manhole. Ln E °i JOINTS: E Joints shall be set with butyl rubber sealant (RUB—R—NEK). Inside of joints c shall be grouted with non—shrink grout. 0 Co BASE: Manhole base shall be precast reinforced Class 3 concrete with extended base and conform to the requirements for manhole risers. All pipe connections Y shall be cored to fit flexible connectors (KOR—N—SEAL or equal) either by c manufacturer or contractor using approved equipment. The precast base shall m be bedded on a minimum of 150 mm of well graded crushed rock over native material that is either undisturbed or compacted to 95%. u d In Crushed Rock Sieve Analysis c 100% Passing 25 mm m e 90-100% Passing 19 mm u 20-55% Passing 9.5 mm o c 0-10% Passing 4.75 Asm E 0-5% Passing 2.36µm Z 0 INVERT: m o 0 Invert shall be completed in a single pour using Class 3 concrete with steel m trowel finish. Any change in direction shall be a fixed radius curve extending from the inlet wall t0 the outlet wall. Inside surface of invert and area between pipe connection and channel shall be free from gaps, holes and sharp edges. All inlets shall be designed and installed such that the top of A pipe elevations match as much as possible. TESTING: The manhole shall be inspected and the contractor shall vacuum—test the manhole prior to placement of backfill, and again after backfill is completed and cover is set at grade. The Contractor shall give the City 48 hours notice prior to testing the manhole. The Contractor shall block the flexible connectors against the manhole walls during :�X the vocuum test. Should the manhole fail the lest. it will be the Contractor's responsibility to make •a a•° a %0 whatever repairs ore necessary to make the manhole pass the vacuum test. .•qe. °e A $0 8 o The Contractor shallP erform the test as follows: ���� �~ \ ��'^'^������� �• All inlets to the manhole will be plugged, a test head will be placed in the top of the manhole and a seal inflated to seal off the manhole. A vacuum of 254 mm of mercury will be drawn on the manhole, and a time measured for the vacuum to drop to 229 mm of mercury. The manhole shall pass the test if the time for the 150 mm 1.2 m or 1.5 m vacuum drop meets or exceeds the value (in seconds) from the following table: min. ES Manhole Diameter a o f Depth 1.2 m 1.5 m E °� o E a O 150 mm 1.2 m 10 sec. 13 sec. N E 1.8 15 20 2.4 20 26 3.0 25 33 3.6 30 39 4.3 35 46 SECTION A—A 4.9 40 52 5.5 45 59 6.0 50 65 APPROVED BY CITY ENGINEER DATE city Of REVISIONS BY APP DATE 11AL Sa►1 SEWER MANHOLE Contractor Vac Test SR BL 10-96 LUIS Metric Conversion SR BL 7-96 �B1SPO October 96 Edition `6610 n , COVER: Manhole frame and cover shall have a 600 rr. clear opening and a seoled blind E a. pickhole (SBF-1900 or approved equal). Tne cover shall be lettered 'SANITARY E 600 mm SEWER". The inside of the frome shall be grouted with non-shrink grout. ADJUSTMENT TO GRADE: 7E Adjust to grade per City Engineering Stanc:•: #6040. E COLLAR: 0o Collar shall be constructed per City Enginee•n; Standard #6040. m CONE: Cone shall be concentric and conform t-, the requirements for risers. Eccentric cones may be used only in special cases with the prior written approval of the Utilities Engineer. Z MANHOLE RISERS: O Manhole risers shall be precast concrete conforming to ASTM C-478, and X a 1.2 m shall have a 150 mm wall thickness with minimal reinforcements. Manholes Shall be 1.2 m in diameter unless the s;ie and/or number of inlet(s) am and outlet(s) warrants the use of o 1.5 m ciorneter manhole. o JOINTS: Joints shall be set with butyl rubber section; (RUB-R-NEK). Inside of joints rn m PROVIDE W shall be grouted with non-shrink grout. SMOOTH 150 mm a TRANSIT1DN + ' BASE: Manhole base shall be precast reinforced Gass 3 concrete with extended base rA 150 mm _ and conform to the requirements for manhole risers. All pipe connections IN. shall be cored to fit flexible connectors ('F.OR-N-SEAL or equal) either by manufacturer or contractor using approved equipment. The precast base shall be bedded on a minimum of 150 mm of well graded crushed rack over native material that is either undisturbed or compacted to 95%. Crushes Rock Sieve .analysis 100% Passing 25 mm A 90-100% Passing 19 mm icy 20-55% Passing 9.5 mm 0-10% Passing 4.75 Am TYPE 'A' DROP INLET INVERT: 0-57. Passing 2.30 Am Invert shall be completed in a single pour using Class 3 concrete with steel trowel finish. Any change in direction she:' `_e a fixed radius curve extending from the inlet wall to the outlet wall. Inside surface of invert and area PIPE LENGTHS CAN between pipe_ connection and channel sh-'i be free from gaps, holes and VARY DEPENDING ON sharp edges. All inlets shall be designed on- installed such that the top of MATCH HOF AMOUNT OF DROP pipe elevations match as much as Possible. TOPSPIPES TESTING: E The manhole shall be inspected and the contractor shall vacuum-test the manhole E^ 15D mm prior to placement of backfill, and again otter backfill is completed and cover is m i 1 A — MIN. set at grade. I The Contractor shall give the City 48 hours nctice prior to testing the manhole. The Contractor shall block the flexible connecters against the manhole walls during ='f - the vacuum test. Should the manhole fail the lest, it will be the Contractor's responsibility to make whatever repairs ore necessary t0 make the manhole pass the vacuum test. The Controctor shall perform the test as fo!:o.s: All inlets to the manhole will be plugged, a les: read will be placed in the top of the manhole and o seal inflated to seal off the r.,-nhole. A vacuum of 254 mm TYPE 'B' DROP INLET of mercury will be drawn on the monho:e, and c time measured for the vacuum to drop to 229 mm of mercury. The manhole sine:, pass the test if the time for the vacuum drop meets or exceeds the value (in seconds) from the following table: 150 mm 1.2 m or 1.5 m Manhole Diameter IN. Depth 1.2 m 1.5 m f.! 1.2 m 10 sec. 13 sec. e1.E. is 20 100 mm MIN. 2.4 20 26 3.0 25 33 3.6 30 39 4.3 35 46 150 mm 1 mm 4.9 40 52 SECTION A—A 5.5 45 59 6.0 50 65 TYPE "B" SHALL BE USED ONLY WHEN AMOUNT OF DROP IS TOO LITTLE FOR TYPE "A" APPROVED 13Y CITY ENGINEER DATE CCCy Of REVISIONS BY APP DATE li san SEWER Metric conversion SR BL 7-96 SAMMMA1 US DROP MANHOLE Contractor Vac Test SR I BL 10-96 OBIS"O October 96 Edition 6620 1-