The contractor must also ensure the construction of adequate returns and keys at the ends. <>/XObject<>/Properties<>>>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> 1 0 obj These products can be used in areas where they meet the local agency requirements. "QamV(Z3VL> US 160NW resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids. 0000000871 00000 n Rock mesh slope protection is a technique to control rockfalls . If the rock layer is shown as 7 inches thick, comply with grading shown in the following table: If the rock layer is shown as 5 inches thick, comply with the grading shown in the following table: If the rock layer is shown as 4-inches thick, comply with grading shown in the following table: Granular material must contain at least 90 percent crushed particles when tested under California Test 205. For combination slope/bench systems in TYPE A soil and a trench depth of less than 8 feet, the steepest maximum allowable slope is 53 degrees from the horizontal. Review Section 4-90, Concrete, of this manual for details about concrete production. These supersede the previous Caltrans Riprap Sizes. the contract cost database using the most recent year of data. The plans indicate the minimum depths of foundations. Place a highly permeable and appro-priately sized geotextile filter fabric on the prepared slope following the manufacturer's recommendations. When shotcrete is to be used, review Section 4-53, Shotcrete, of this manual. If extensive slope protection problems are anticipated or encountered during construction, refer these to the design engineer and the project manager, who may in turn obtain the advice of the Caltrans Bank and Shore Protection Committee.. Contract Cost Data Project Details. Cold storms bringing wind, rain and low-elevation snow heavy at times are forecast through early March. Angular shaped rock may be used on any planned slope. BMP040 "rock slope protection (no fabric)" as applicable. US Fabrics is proud to serve the geotextile needs of the State of Califronia, including: Los Angeles, San Diego, San Jose, San Francisco, Fresno, Sacramento, Long Beach, Oakland, Bakersfield, Anaheim, Santa Ana, Riverside, Stockton, Chula Vista, Fremont, Irvine, San Bernardino, Modesto, Oxnard, Fontana, Moreno Valley, Glendale, Huntington Beach, Santa Clarita, Garden Grove, Santa Rosa, Oceanside, Rancho Cucamonga, Ontario, Lancaster, Elk Grove, Palmdale, Corona, Salinas, Pomona, Torrance, Hayward, Escondido, Sunnyvale, Pasadena, Fullerton, Orange, Thousand Oaks, Visalia, Simi Valley, Concord, Roseville, Santa Clara, Vallejo, Victorville, El Monte, Berkeley, Downey, Costa Mesa, Inglewood, Ventura, West Covina, Norwalk, Carlsbad, Fairfield, Richmond, Murrieta, Burbank, Antioch, Daly City, Temecul and all other areas of California. Standard contract items and descriptions for Caltrans projects. Erosion Control Fabrics featured here have been used in a wide range of applications including slope stabilization, sediment containment, runoff filtration, home protection, and vegetative regrowth. For Type R, F, or Common stone riprap, provide Type 2 filter fabric when shown on the plans. Start by choosing whether your patio is a **single rectangle** or if it has a different shape, in which case you. Slope Protection consists of rock, concrete, or concreted rock or slope paving ROCK SLOPE PROTECTION ROCK SHOULD DEMONSTRATE Stability: Angular shapes may be used on any planed slope Durability: Resist degradation and have a durability of 52 minimum (Caltrans) Consistency: Product is the same load after load. 3 0 obj Fabric must be RSP fabric that complies with the class shown in the following table: Rock must be cobble, gravel, crushed gravel, crushed rock, or any combination of these. Refer to Section 4-96, Geosynthetics, of this manual for guidelines for inspecting and accepting rock slope protection fabric. Manufacturers information can be found at: Also, ensure the contractor does not drop rock into place; otherwise, cracking or breaking may occur. (b) Paving fabric specification requires a minimum mass of 4.1 sy/oz. For details about concrete production, review Section 4-90, Concrete, of this manual. Broken-concrete slope protection consists of placing broken concrete from job site locations identified within the contract. endobj Geosynthetic Bond Breaker (Call for product. Your search for great running gear starts and ends with us. com routes make excellent running trails for serious runners and casual joggers, alike. For RSP Classes I thru VIII, use Class 8 RSP-fabric which has lower weight per unit area and it also has lower toughness (tensile x elongation, both at break) than Class 10 RSP-fabric. Erosion control is an important element of successful slope protection. <>stream Concrete canvas (CC) has the potential to become a widely used slope protection material owing to advantages such as flexibility, fast construction with low labor costs, and quick strength development. Draw Down Device, Temporary Access Bridge (1 of 2, PDF only), Temporary Access Bridge(2 of 2, PDF only), Temporary Access Culvert (1 of 2, PDF only), Temporary Access Culvert (2 of 2, PDF only), Onsite Concrete Washout Structure (1 of 2, PDF only), Onsite Concrete Washout Structure (2 of 2, PDF only), If you are experiencing difficulty accessing these details or if there are anyquestions, please contact the Sediment, Stormwater & Dam Safety Program at (410) 537-3543 or by email (Amanda.Malcolm@maryland.gov, National Human Trafficking Hotline - 24/7 Confidential. There are three material gradation requirements based on required rock layer thicknesses. /Filter/FlateDecode To respond to the different problems associated with instability of rock faces, Geofabrics also has a broad range of independently verified rockfall mitigation systems. You may check the size of rock by roughly measuring the size and converting the volume to mass. Roll size is 15'x300 Equivalent to Mirafi 1120NC or Skaps GT112 (Click here for spec) The color shall be black unless otherwise specified in the contract documents. Refer to Section 4-96, Geosynthetics, of this manual for guidelines on inspecting and accepting rock slope protection fabric. Complete the Patio or Walkway 6. The method for placing rock will either be Method A or Method B, whichever the contract designates, as discussed in Section 4-7203A, Rock Slope Protection, of this manual. HToL[U?Ayb:V;%Y48{RMLIlq&+J[mNN?J;A? Check to ensure that slopes and foundation areas are graded and compacted to specified tolerances. The contract will identify the designated method. This section provides guidelines for inspecting slope protection for work specified under Section 72, Slope Protection, of the Standard Specifications. /Type/ExtGState endobj To ensure the success of Method A, ensure that the bearing of rocks from one to the other follows specifications and that the use of chinking rocks is limited to filling voids. These products were developed to meet specific agency (DOTs, MTOs, etc.) 2019-07-30T13:47:33-04:00 Decide whether an adequate number has been provided for the particular installation. main search page where you can specify additional parameters. California Department of Transportation K@^9t% OZ$Mb Ne#^/_*Zw;*T_]k. (You may enter part of the word or the whole phrase). Caltrans requires the use of these new RSP gradations starting August 1st, 2016 in new projects and those not yet at 30 percent PS&E stage. Before placement of the broken concrete, inspect the material and be sure the reinforcement has been removed flush to the surface of concrete. construction contract standards page. (For large riprap, consider a four inch layer of sand to protect the . are available to meet BABA (Build America, Buy America) requirements. endobj KEwAx{N*$J }COpU?s{bs. <>stream To provide the desired cleanliness, the contractor may need to sluice the rock or facing. 1, METHOD B) (TON), ROCK SLOPE PROTECTION (NO. Please enable JavaScript in your browser. If you have any questions about the consistency of the gabions, you may also order the unit weight to be verified during the course of the work. When rock slope protection fabric is required for either method, ensure the contractor places the fabric before placing the rock slope protection. For measurement and payment, do the following: Chapter 1 - Caltrans Construction Organization, CalOES: Power Outage and Fire Recovery Resources. Provide filter fabric in accordance with DMS-6200, Filter Fabric. For protection stone riprap, provide Type 2 filter fabric unless otherwise shown on the plans. There are three material gradation requirements based on required rock layer thicknesses. All items. The maximum height of the vertica l lower portions 3.5 feet. 2019-07-30T13:44:04-04:00 %PDF-1.4 Benchmark inspection of sampling and testing of rocks. When evidence exists that the foundation depth is inadequate, obtain both the design and hydraulics engineers concurrence with a change order to deepen the foundation. Copies of these details are made available below in both Adobe Portable Document Format(PDF) and AUTOCAD Drawing (DWG) file formats. Copyright Maryland.gov. The equilibrium soil-to-geotextile system that allows for adequate movement of a liquidin the plane of the geotextile over the service lifetime of the application. Slope protection structures are to be used where concentrated water will cause excessive erosion on existing and/or recent cut and fill slopes. Note any changes that may have occurred between the preliminary design studies and the start of construction. rock slope protection fabric (class 8) 591200 rock stain: 780450 rock stain: 720110 small-rock slope protection: 192032 structure excavation (rock slope protection) (engmet) Barrier Landscape Edging & Paver Edging 6'/8. Products with a are available to meet BABA (Build America, Buy America) requirements. Mirafi 135N, 140NL and 140NC are lighter weight versions of Mirafi 140N . 2, METHOD B) (TON) (ENGMET), ROCK SLOPE PROTECTION (NO. (800) 518-2290, Providing the most comprehensive geosynthetic lines in the industry. Testing must follow the frequencies shown in Section 6-1, Sample Types and Frequencies, of this manual. conforming to the requirements of 710-03 Vinyl Coated Steel Fence Fabric, Class A Wire Diameter, except color. Ensure the timber spacers are of the required material and spaced as planned. There are three material gra requirements based on required rock layer dation thicknesses. Erosion Control Blankets Wattles help slow water runoff and reduce soil erosion. Resident engineers should be familiar with the material contained in Chapters 870, Bank ProtectionErosion Control, and 880, "Shore Protection," of the Highway Design Manual. Erosion control devices provide direct protection to the soil surface therefore, are considered one the best measures for preventing erosion. Flat or needle shaped rock must not be used unless the individual rock thickness is greater than 0.33 times the length. Mirafi N-Series nonwoven polypropylene geotextiles are used for soil separation, drainage in Transportation, Building Site, and Water Infrastructure projects such as subsurface drainage, permanent erosion control and roadway separation applications. (see Riprap Slope Protection Worksheet). The challenge was to construct a new taxiway over areas that were built on tidal flats and land reclaimed from Boston Harbor. Temporary structures shall be left in place until adequate vegetation and the permanent . Slope protection is usually needed to protect the upstream slope against erosion due to wave action. The concrete slope protection method consists of paving the embankment with portland cement concrete. Source: Caltran Highway Design Manual, Chapter 870 If using geotextile fabric, place on the smoothed foundation, overlap the edges at least 12 inches and secure with anchor pins spaced every three feet along the overlap. The contract plans will designate the required rock layer thickness for each location. Use the size and composition of yarn that is recommended by the fabric manufacturer. /OPM 1 All rights reserved. The State of Maryland pledges to provide constituents, businesses, customers, and stakeholders with friendly and courteous, timely and responsive, accurate and consistent, accessible and convenient, and truthful and transparent services. You can also lay bags of sand along problem areas in your landscape to keep soil from washing away and to redirect water. Class E Revetment Erosion Stone or Class E Revetment Erosion Stone or A A Engineering Fabric Ditch Bottom 2' 2' Anchor Slot W 6'' min. 1 0 obj AASHTO is typical mass of 4.1 sy/oz.. JavaScript is required to use content on this page. Values shown are based on Table 873.3A dimensions and an assumed specific gravity of 2.65. 4-7203C Small-Rock Slope Protection The small-rock slope protection method consists of excavating and backfilling the footing trench, placing rock slope protection fabric as shown, and placing small rocks on the slope. Geotextiles have been in use for thousands of years dating back to the Egyptian Pharaohs. Review contractors verification of unit weight of rock-filled gabions. Provide galvanized guide rail cables a minimum 19 mm in diameter, consisting . Maximum slope 1.5:1 horiz:vert, (67% or 34) or flatter, and is limited to slopes < 30' of uninterrupted length. The equilibrium soil-to-geotextile system that allows for adequate movement of a liquid across the plane of the geotextile with limited soil loss over the service lifetime of the application. >> (b) Paving fabric specification requires a minimum mass of 4.1 sy/oz. 9 0 obj L Earth Compacted Fabric Engineering 6'' 1'-0'' centers Staples at 6'' 2'' 6'' (Rock Splash Basin) TYPE 4 1 2 (Rock Slope Protection) TYPE 5 Staples at 12 inch centers.
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