PUBLIC WORKS STANDARD DETAILS

Transcription

1 PUBLIC WORKS STANDARD DETAILS

2 SUBSTANTIAL EFFORT HAS BEEN MADE TO ENSURE THE INFORMATION CONTAINED IN THESE STANDARDS IS ACCURATE. HOWEVER, THE CITY OF BRADENTON BEACH CANNOT ACCEPT RESPONSIBILITY FOR ANY ERRORS OR OVERSIGHTS IN THE USE OF THE MATERIAL OR IN THE PREPARATION OF THE ENGINEERING PLANS. THIS PUBLICATION IS INTENDED FOR USE BY PROFESSIONAL PERSONNEL COMPETENT TO EVALUATE THE SIGNIFICANCE AND LIMITATIONS OF ITS CONTENTS AND BE ABLE TO ACCEPT RESPONSIBILITY FOR THE APPLICATION OF THE MATERIAL IT CONTAINS. THE DESIGNER MUST RECOGNIZE THAT NO HANDBOOK OR CODE CAN SUBSTITUTE FOR EXPERIENCED ENGINEERING JUDGEMENT. SOME OF THE RECOMMENDATIONS ARE UNDER FURTHER REVIEW AND MAY BE UPDATED LATER. USERS OF THESE STANDARDS ARE ENCOURAGED TO OFFER COMMENTS TO CITY OF BRADENTON BEACH PUBLIC WORKS DEPT ON THE CONTENTS OF THIS PUBLICATION AND SUGGESTIONS FOR CHANGES IN FUTURE EDITIONS. THESE STANDARDS ARE UNDER CONSTANT REVIEW AND ARE SUBJECT TO CHANGES APPROVED BY THE DIRECTOR OF PUBLIC WORKS. THE DIRECTOR OF PUBLIC WORKS SHALL INTERPRET THESE STANDARDS, AS NEEDED, FOR APPLICATION AND RESOLUTION OF CONFLICTS. NOTE: ALL CONSTRUCTION AND STANDARDS REFERENCED WITHIN SHALL MEET OR EXCEED F.D.O.T. ROADWAY AND TRAFFIC DESIGN STANDARDS (LATEST REVISION) AND F.D.O.T. STANDARD SPECIFICATIONS FOR ROAD AND BRIDGE CONSTRUCTION (LATEST REVISION), UNLESS OTHERWISE NOTED. CITY OF BRADENTON BEACH PUBLIC WORKS DEPT REV.BY DATE DATE OF ADOPTION DISCLAIMER SHEET

3 LEGEND REAR ALLEY WITH CITY DRAINAGE FACILITY OR CANAL PL = PROPOSED AS PER APPROVED PLANS = AS-BUILT ELEVATION PL = PROPERTY LINE INFILTRATION TRENCH H.P. = HIGH POINT = FLOW = EASEMENT C L = C L OF SWALE = EXISTING POOL EXIST. FINISH FLOOR E E ADJACENT STRUCTURE DRIVEWAY E EASEMENT PL INFILTRATION TRENCH PROPOSED DWELLING FINISH E FLOOR EASEMENT GARAGE FLOOR DRIVEWAY INFILTRATION TRENCH PL EASEMENT VACANT OR DEVELOPED LOT EASEMENT CULVERT CL CITY INFILTRATION SYSTEM PL CULVERT CL CITY INFILTRATION SYSTEM LC STREET NAME C L (HIGH POINT) PL ESMNT. LINE VARIES SETBACK VARIES FINISHED FLOOR EL. 6" MIN. 4 1 MAX 8" MIN. INFILTRATION TRENCH PER CITY STANDARD DETAIL CROSS SECTION E-E LTB NTS CITY OF BRADENTON BEACH PUBLIC WORKS STANDARD DETAIL 1.02

4 MATCH EX. GRADE 1-3 INCH MEDIUM WASHED SHELL OR RECYCLED CONCRETE (NO. 57 STONE EQUIV.) INSTALL FILTER FABRIC (MIRAFI N SERIES FABRIC OR EQUIV) ON BOTH SIDES OF TRENCH AND WITHIN TOP 4-6". TOP SURFACE MAY BE 89 ROCK (PEA GRAVEL), RIVER ROCK OR OTHER PERVIOUS LANDSCAPE MATERIALS AS APPROVED BY PUBLIC WORKS DEPARTMENT TYPICAL INFILTRATION TRENCH NTS OVEREXCAVATE TO WATER LEVEL OR UNTIL CLEAN SAND IS ENCOUNTERED AND BACKFILL TRENCH WITH CLEAN SAND OR SHELL

5 MATCH EX. GRADE AT PROPERTY LINE 6" DEPTH COMMERCIAL GRADE #57 STONE 12" DEPTH COMMERCIAL GRADE # 57 STONE (TESTED TO A 40% VOID (SSD)). INSTALL FILTER FABRIC (MIRAFI N SERIES FABRIC OR EQUIV) ON BOTH SIDES OF TRENCH AND BELOW TOP LAYER OF STONE OVEREXCAVATE TO WATER LEVEL OR UNTIL CLEAN SAND IS ENCOUNTERED AND BACKFILL TRENCH WITH CLEAN SAND OR SHELL LIMESTONE BASED 57 ROCK NOT ALLOWED WITHIN AREAS DIRECLTY CONNECTED TO PIPES AND OUTFALLS TO SARASOTA AND TAMPA BAY. RECYCLED CONCRETE SHALL BE USED IN THOSE LOCATIONS. HEAVY DUTY INFILTRATION TRENCH NTS LTB NTS CITY OF BRADENTON BEACH PUBLIC WORKS STANDARD DETAIL 1.04

6 12' MINIMUM WIDTH AT BACK OF DRIVE 3' MIN. MITERED END SECTIONS 4:1 SLOPE 6" CONC 12' WIDTH W/ MIN. 6"x6" #10 MESH 1' MIN. 6" MIN. RCP 15" MINIMUM EQUIVALENT DIAMETER 24' MINIMUM, PLUS MITERED END SECTIONS TYPICAL DRIVEWAY VARIABLES: C.M.P. WILL NOT BE ALLOWED WITHIN THE RIGHT-OF-WAY. R.C.P. WILL REQUIRE A MINIMUM 6" OF COVER BENEATH BOTTOM OF DRIVEWAY, FOR A TOTAL OF 1' OF COVER. HDPE PIPE IS ACCEPTABLE IN LIEU OF RCP. ALTERNATIVE DRIVEWAY MATERIALS MAY BE UTILIZED AND/OR REQUIRED IN ACCORDANCE WITH THESE STANDARDS IN LIEU OF OR IN ADDITION TO DRIVEWAY CULVERT BASED ON PUBLIC WORKS REVIEW. NOTE: 1) GRADES AND LOCATIONS MUST BE REVIEWED AND APPROVED BY PUBLIC WORKS FOR ALL PIPE INSTALLATIONS 2) ACTUAL REQUIRED PIPE DIAMETER WILL BE BASED ON THE FLOW RATE REQUIRED TO PASS THROUGH PIPE SO AS NOT TO IMPOUND WATER UPSTREAM. 3) PIPE SIZE TO BE DETERMINED AND APPROVED BY PUBLIC WORKS.

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8 WEDGE MILL EXIST. ASPHALT NEW ASPHALT TO MATCH EXIST. 25' WEDGE MILL EXIST. ASPHALT NEW ASPHALT TO MATCH EXIST. 25' C 18" W 18" OVERLAY ASPHALTIC CONCRETE TYPE S-III WITH PRIME COAT (SEE (13)) BASE CRUSHED CONCRETE BASE ASPHALT SAWCUT SAWCUT EXISTING ASPHALT H BACKFILL TYPE S-I OR TYPE S-III 18" SELECT MATERIAL DIA. VARIES D 18" 18" A. CRUSHED CONCRETE BASE SHALL BE A MINIMUM OF 8" THICK AND A MINIMUM OF "W" IN WIDTH, OR GREATER, WHERE DISTURBED AREA IS GREATER THAN "W" FROM EQUATION: W=(2 X H) + D + (2 X 18"). SAND ASPHALT BASE WILL BE AN ACCEPTABLE ALTERNATE. B. BACKFILL, AASHTO M SHALL BE PLACED IN LAYERS NOT TO EXCEED 6", EACH LAYER WILL BE THOROUGHLY TAMPED AND/OR ROLLED TO 98% OF MODIFIED PROCTOR MAXIMUM DENSITY (AASHTO T-180). NON-SHRINK, HIGH SLUMP, 1,500 PSI CONC. BACKFILLL MAY BE USED AS AN ALTERNATIVE IF APPROVED BY TRANSPORTATION DEPARTMENT. C. SELECT MATERIAL, AASHTO M , SHALL BE PLACED ON BOTH SIDES OF THE PIPE SIMUTANEOUSLY, COMPACT AREA UNDER HAUNCHES OF THE PIPE W/ MECHANICAL TAMPERS, AND THROUGHOUT THE REMAINDER OF THE SELECT MATERIAL. D. ASPHALTIC CONCRETE FRICTION COURSE, SHALL BE THE SAME DEPTH AND TYPE AS EXISTING OR A MINIMUM OF ONE INCH, WHICHEVER IS GREATER. C = W+36 E. "H" = THE DEPTH FROM TOP OF PIPE TO THE CENTERLINE OF THE ROAD (MINIMUM OF 36") MINIMUM OF 30" UNDER FLOWLINE OF SIDE DITCHES. F. RESTORE EXISTING SIGNAGE & MARKING WITH THERMOPLASTIC PER F.D.O.T. STANDARDS. LTB NTS CITY OF BRADENTON BEACH PUBLIC WORKS STANDARD DETAIL 1.012

9 18" 1' SAWCUT EXIST. PAVEMENT AND REMOVE PROPOSED OVERLAY * PROPOSED ASPHALT (MATCH EXIST.) EXIST. BASE EXIST. SUB-BASE ** PROP. BASE (MATCH EXIST. OR GREATER) AS PER STANDARDS ** PROP. SUB-BASE (MATCH EXIST. OR GREATER) EXIST. ASPHALT * NOTE: LIMITS OF OVERLAY - EDGE OF PAVEMENT TO EDGE OF PAVEMENT AND 25' BEYOND LIMITS OF CONSTRUCTION. ** NOTE: CONNECTION TO OLDER (SUBSTANDARD THICKNESS) ROADS MAY REQUIRE THICKER PROPOSED BASE AND SUB-BASE TO MEET CURRENT STANDARDS. SIGNAGE AND MARKING PLAN SHALL ACCOMPANY CONSTRUCTION PLAN. ROAD CONNECTION DETAIL N.T.S. LTB NTS CITY OF BRADENTON BEACH PUBLIC WORKS STANDARD DETAIL 1.013

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11 Reduce the amount of impervious surface proposed for your project. This will reduce the amount of runoff produced after a rain storm (water quantity). (Did you know that a 1/4 inch of rainfall on a 2,000 ft 2 roof produces 312 gallons of runoff?) Efforts to reduce the amount of impervious and areas where alternative design and construction techniques or alternative construction materials will be used should be described in the application and shown on the plans where possible. Ways to reduce the amount of impervious surface can include, but are not limited to: Reducing the size of the home. Reducing or eliminating concrete decks such as pool decks or patios. Using pea gravel or paving stones to construct sidewalks and other external walkways instead of solid concrete. Constructing the driveway with two wheel tracks with grass in the middle instead of solid concrete or asphalt. See Figure 2a. Figure 2a. (Source: Google Images.) Construct the driveway using gravel (not limerock) instead of solid concrete or asphalt. See Figure 2b. Figure 2b (Source: Google Images.) Construct the driveway using paving stones with grass in between instead of solid concrete or asphalt. See Figure 2c. Figure 2c (Source: Google Images.) DEP-WMD AH Volume I Design Aids Guidelines for SFR June 19, 2013 DA 2-1

12 Construct the driveway with gravel, pavers, or wheel tracks and invert the crown, or center line of the driveway so that runoff flows toward the middle and not to the outside edges. See Figure 2d. Figure 2d. Example driveway cross section. (Note: scale is exaggerated.) As much as possible, direct stormwater runoff from rooftops and other impervious surfaces onto grassed areas or into rain gardens, landscaping and flower beds. Doing this will slow down the runoff allowing some of it to percolate into the ground or evaporate into the air, which will reduce the chances of causing offsite flooding. Efforts to minimize and redirect stormwater runoff to grassed or landscaped areas should be described in the application and shown on the plans to the extent possible. Please see Figures 3a and 3b, below. Figure 3a. Roof gutter down spout draining onto a concrete driveway Figure 3b. Roof gutter down spout draining onto grass Fill material to be used for the house pad and/or driveway must be clean (without rubbish or vegetative material) and it should drain well. Specifications for the fill material to be used in the project should be included in the supporting information submitted with the permit application. The pre-development drainage patterns must be maintained as much as possible. Adding vegetated swales and/or buffer strips to intercept and direct runoff to pre-development locations may be necessary. Please see figures 4a and 4b, below, for an example: DEP-WMD AH Volume I Design Aids Guidelines for SFR June 19, 2013 DA 2-2

13 Full Exfiltration System Galvanized steel or PVC screen fastened over inlets Geotextiles brought up to curb and cut off flush with surface of AquaPave Curb/edge restraint with cut-outs for overflow drainage Overflow pipe(s) - diameter, location and quantity vary with design; locate away from vehicular traffic Outfall pipe(s) sloped to storm sewer or stream 50mm (2") 100mm (4") AquaPave 5mm (1/4") clear crush open-graded Bedding Course Inbitex Geotextile 20mm (3/4") clear crush open- graded aggregate Upper Sub-base 250mm (10") 63mm (2-1/2") clear crush open-graded aggregate Lower Sub-base (commonly referred to as rail ballast) AP SC1000 Woven Geotextile on bottom and sides of open-graded base All conversions from Metric to Imperial are approximate. Illustrations are not to scale. Optional SC Intergrid as specified by Engineer A paving system we can all live with

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