1 0 obj 0000002313 00000 n Properly designed and planted vegetative covers play 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. If the slope is steeper than 2:1, do not use rounded boulders and cobbles. YOU MUST NOTIFY US FABRICS BEFORE RECEIVING PRICING. 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. Review contractors verification of unit weight of rock-filled gabions. =w (j($M/!bMbo,iDjQL1{L! Thishandbook includes new and revised details for the various practices that are used in the development of erosion and sediment control plans. Be sure to consult your local project engineer or construction professional about the rock sizing and particular . with a minimum of 50% of the stones . 2, METHOD B) (CY) (ENGMET), ROCK SLOPE PROTECTION (NO. Mirafi 1100N, 1120N and 1160N are heavy weight nonwoven geotextiles for more severe or extremely harsh conditions, such as rip-rap and revetment applications. are available to meet BABA (Build America, Buy America) requirements. (a) Exception: US 250NW is 5 pounds short on "grab breaking load" for Sediment Filter Bags. Contact your local TenCate Geosynthetic representative for the proper use and specification of these products. If the rock contains an excess of fines or inadequate voids, the desired results may be impossible to obtain. EZw5'dr=`j+2\8:U.|V,%)~h/X8ps endobj 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. 5 0 obj The following common types of slope protection are covered in this section: Other protective devices are used in conjunction with highway construction, and when used, they are included in the contracts special provisions. | Conditions of Use | Privacy Policy This article studies the mechanical properties and stability of CC slope protection by comparing it with conventional material (shotcrete). There are three material gra requirements based on required rock layer dation thicknesses. You may be trying to access this site from a secured browser on the server. Project Details For EA 04-0A0204 ITEM NUMBER 729011 ROCK SLOPE PROTECTION FABRIC (CLASS 8) Bid Opening Date (mm-dd-yyyy): 04-21-2021 District-County-Route-Postmile: 04-SON-1-R15./R15.7 Quantity: 220 SQYD Unit Price: $21.50 Total Price: Type of work: REALIGN ROADWAY When changes are made, maintain records of details, depths, heights, and other dimensions, and enter these on the as-built plans. cIP=L ?L-o'OfE;9'WgIBdysw>vOo#g 8L3f*7Mnd*3cdLy&v~;6s8;)9Q"SE8a+3/>svm^}+7Ea8IG01nY5y7mxJ]X9sGjv][ppYdv r=0EVPTO(Xam -j9 WYY5:F"l9o&l:dyg^0GXoZgm[\H2#RrlXpZd`CAlwE.Sz.BuTiqT;E@m3I~`km&yeF 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. To provide the desired cleanliness, the contractor may need to sluice the rock or facing. Check to ensure that slopes and foundation areas are graded and compacted to specified tolerances. Mirafi 135N, 140NL and 140NC are lighter weight versions of Mirafi 140N . Shop Lowe's for solutions to control erosion on slopes, as well. The maximum height of the vertica l lower portions 3.5 feet. RSP-fabric Type of geotextile and quality requirements per Section 96 Rock Slope Protection Fabric of the Standard Specifications. /Length 5601 3 0 obj When shotcrete is to be used, review Section 4-53, Shotcrete, of this manual. 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 slope protection is paid by weight, refer to the discussion of weighing and metering procedures in Section 3-902E, Weighing Equipment and Procedures, of this manual. All items. For maximum effect, both components must be integrally planned prior to road construction. When exposed aggregate slope paving is specified, ensure any concrete set retarders are used in accordance with manufacturer instructions. Before placement of the broken concrete, inspect the material and be sure the reinforcement has been removed flush to the surface of concrete. Check the area to be protected to ensure that the required expansion joints are in place. Links to important documents and pages can be found below the chart. 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. Graniterock has a 101-year history of providing high quality products and service. 0000013368 00000 n To respond to the different problems associated with instability of rock faces, Geofabrics also has a broad range of independently verified rockfall mitigation systems. Soil Stabilization Matting - Slope Application, Perm. Copyright 2023 TenCate Geosynthetics Americas. 0000014231 00000 n Benchmark inspection of sampling and testing of rocks. Geotextiles. 0000008331 00000 n /OP true stream 0000007052 00000 n Geotextiles have been in use for thousands of years dating back to the Egyptian Pharaohs. Natural Resources & Energy Infrastructure, Energy - Power Generation - Renewables - Solar, Energy - Power Generation - Renewables - Wind. US 160NW is a nonwoven needlepunched geotextile made of 100% polypropylene staple filaments. Please enable JavaScript in your browser. endobj <>/XObject<>/Properties<>>>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> trailer << /Size 489 /Info 438 0 R /Root 464 0 R /Prev 989742 /ID[<23d8c9b814a334ef8bf252da6b923edc><23d8c9b814a334ef8bf252da6b923edc>] >> startxref 0 %%EOF 464 0 obj << /Pages 445 0 R /Type /Catalog >> endobj 487 0 obj << /S 1440 /Filter /FlateDecode /Length 488 0 R >> stream 3. % Mirafi 140N is a lightweight non woven geotextile that meets AASHTO M288 Class 3 geotextiles for separation and subsurface drainage. When specified, ensure coloring is added to the concrete. 1, METHOD B) (TON), ROCK SLOPE PROTECTION (NO. Place a layer (six inch minimum) of Contract Cost Data Project Details. The contract plans will designate the required rock layer thickness for each location. the contract cost database using the most recent year of data. requirements. If your 20'x10' patio is to have a 6" base, then you should excavate a total area of 21' (20' +6" +6") by 11' (10' +6" +6"). concreted-rock slope protection (1/2 t, class vii, method b) (ton) 723215 concreted-rock slope protection (1/4 t, class v, method b) (cy) 723220 concreted-rock slope protection (1/4 t, class v, method b) (ton) 729011 rock slope protection fabric (class 8) 729012 rock slope protection fabric (class 10) 750020 rigid rail fall protection system In 2007, the FAA approved construction of a new center field taxiway (Taxiway Mike) to alleviate airfield congestion. Technical Support available for assistance. 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. <>stream Testing must follow the frequencies shown in Section 6-1, Sample Types and Frequencies, of this manual. 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. Decide whether an adequate number has been provided for the particular installation. Temporary structures shall be left in place until adequate vegetation and the permanent . Observe construction to ensure the contractor does the placing, finishing, and curing as specified. endobj Values shown are based on Table 873.3A dimensions and an assumed specific gravity of 2.65. Your search for great running gear starts and ends with us. Angular shaped rock may be used on any planned slope. The Standard Specifications provide two methods of placement for this type of protection: Method A and Method B. endobj Start by choosing whether your patio is a **single rectangle** or if it has a different shape, in which case you. At the start of gabion placement, require the contractor to verify the minimum unit weight of the gabions to ensure it meets specifications. 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. >> Mirafi N-Series nonwovens combine high water flow rates, high soil interaction and durability while providing excellent soil particle retention. Mirafi N-Series Product Description Sheet. 3, METHOD B) (TON), STRUCTURE EXCAVATION (ROCK SLOPE PROTECTION) (ENGMET). TAR_%R5Wa%*x4ux-x5d1c iU:v9b!KXGcFK 1fN2 t K! 0000004014 00000 n 0000000928 00000 n 2019-07-30T13:47:33-04:00 Intermediate, or B dimension (i.e., width) where A dimension is length, and C dimension is thickness. application/pdf Cold storms bringing wind, rain and low-elevation snow heavy at times are forecast through early March. %PDF-1.4 Ensure that the contractor performs concrete finishing as specified and that the slope paving is cured by one of the specified methods. The method is particularly adaptable to locations where high-velocity flow is not detrimental, but desirable, and the hydraulic efficiency of smooth surfaces is important.
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