MasterFormat: 2020
Download this Porous Pavement System Specification for   WORD | WORD-Canadian | WP | RTF | TEXT
Find over 500 more construction specifications | Arcat.com
         
Presto Geosystems Porous Pavement System
 
         
SECTION 32 12 00
 
         
POROUS PAVEMENT SYSTEMS
 
         
 
         
Copyright 2019 - 2022 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** Presto Geosystems; Geoweb Soil Stabilization System.
This section is based on the products of Presto Geosystems, which is located at:
670 N. Perkins St. P. O. Box 2399
Appleton, WI 54912-2399
Toll Free Tel: 800-548-3424
Tel: 920-736-1336
Fax: 920-738-1222
Email: request info
Web: http://www.prestogeo.com
[ Click Here ] for additional information.
PRESTO GEOSYSTEMS partners with architects and engineers to offer a full range of solutions for creating long-lasting porous pavements and solving challenging soil stabilization problems. The GEOBLOCK grass pavers and GEOPAVE® gravel pavers deliver durable, low-maintenance, permeable options to support any loading requirement and manage stormwater on-site. The GEOWEB® 3D soil stabilization system provides benefits in diverse environmental design applications including permeable pavements, slope erosion control, channel, and shoreline protection, vegetated MSE retaining walls and surface protection applications. The GEORUNNER® and GEOTERRA® systems are strong, yet light-weight construction mats ideal for site access and 40-70 percent more economical than timber or heavy HDPE mats. Presto offers free project evaluation service.
 
          PART 1GENERAL
 
          1.1SECTION INCLUDES
          ** NOTE TO SPECIFIER ** Delete any paragraphs below not applicable to project.
 
          A.Porous Pavement Systems. (GeoBlock) (GeoBlock5150) (GeoPave)
 
          1.2RELATED SECTIONS
          ** NOTE TO SPECIFIER ** Delete sections below not relevant to this project; add others as required.
 
          A.Section 31 20 00 - Earth Moving.
 
          B.Section 33 46 13.13 - Foundation Drainage Piping.
 
          C.Section 32 10 00 - Bases, Ballasts, and Paving.
 
          D.Section 32 39 33 - Artificial Rock Fabrications.
 
          E.Section 32 90 00 - Planting.
 
          F.Section 32 92 13 - Hydro-Mulching.
 
          1.3REFERENCES
          ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
          A.American Association of State Highway and Transportation Officials (AASHTO):
          1.AASHTO - Chapter 5, Aggregate Specifications and Requirements.
 
          B.American Society of Testing and Materials (ASTM):
          1.ASTM D1693 - Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics.
          2.ASTM F1951 Standard Specification for Determination of Accessibility of Surface Systems Under and Around Playground Equipment.
 
          C.CBR - California Bearing Ratio Method.
 
          D.U.S. Green Building Council, LEED Building Design and Construction (BD+C) Version 4.0 Rating System. (LEED v4.0)
          ** NOTE TO SPECIFIER ** Select one of the following two Presto Geosystems System Description paragraphs for the product required and delete the one not required.
 
          1.4SYSTEM DESCRIPTION (GEOBLOCK OR GEOBLOCK5150)
 
          A.Porous pavement system provides vehicular and pedestrian load support over grass areas, while protecting grass from harmful effects of traffic.
 
          B.Major Components of the Complete System Include:
          1.Porous pavement units.
          2.Engineered base support soil.
          3.Selected topsoil.
          4.Selected vegetation.
          5.Steel anchors, if required.
 
          C.Both the porous pavement units and base support soil, if required, work together to support imposed loading.
 
          D.Both the porous pavement units and topsoil contribute to vegetation support.
 
          1.5SYSTEM DESCRIPTION (GEOPAVE)
          ** NOTE TO SPECIFIER ** Edit and delete portions below not relevant to this project; add others as required. Vehicles should be limited to vehicles with a maximum tire pressure of 90 psi.
 
          A.Porous pavement system creates a structural framework to stabilize open-graded aggregate for aggregate surfaces, or an aggregate/topsoil engineered infill for vegetated surfaces.
 
          B.Increases bearing strength and provides a permeable load support structure for vehicular or pedestrian traffic loading requirements using porous aggregate or engineered infill material.
 
          C.When vegetated, protects grass from harmful effects of occasional traffic.
 
          D.Major Components of the Complete System include:
          1.GeoPave porous pavement units.
          2.GeoPave U-CLIP connectors.
          3.Porous aggregate or aggregate/topsoil engineered base, if required.
          4.Porous aggregate or aggregate/topsoil engineered infill.
          5.GeoPave SNAP delineators.
          ** NOTE TO SPECIFIER ** Delete surface option not required.
 
          E.Aggregate Surface: GeoPave porous pavement units, aggregate infill, and aggregate base support materials, if required, work together to support imposed loading.
 
          F.Vegetated Surface: GeoPave porous pavement unit, aggregate/topsoil engineered infill and aggregate/topsoil engineered base support soil, if required, work together to support imposed loading, and contribute to vegetation support.
 
          1.6SUBMITTALS
 
          A.Submit manufacturer's shop drawings in accordance with Section 01 30 00 - Administrative Requirements including manufacturer's product data, general laying pattern and anchoring.
 
          B.Product Data: Submit manufacturer's product data including printed installation instructions and methods for maintaining installed products.
 
          C.Shop Drawings: Submit manufacturer's shop drawings including laying pattern and anchoring.
          ** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.
 
          D.LEED Submittals: Provide documentation of how the requirements of Credit will be met:
          1.List of proposed materials with recycled content. Indicate post-consumer recycled content and pre-consumer recycled content for each product having recycled content.
          2.Product data and certification letter indicating percentages by weight of post-consumer and pre-consumer recycled content for products having recycled content.
 
          E.Certificates: Submit the following prior to the start of work.
          1.Product certificates signed by the manufacturer certifying material compliance of polyethylene used to make porous paving units.
          2.ISO Certification certifying manufacturer's quality management system is currently registered to ISO 9001:2015 quality standards.
          ** NOTE TO SPECIFIER ** Delete installer and Manufacturer's field representative qualifications if not required
          3.Qualifications certifying installer experience in the installation of Porous Pavement Systems.
          4.Qualifications of Manufacturer's field representative certifying field representative experience in the installation of Porous Pavement Systems.
          5.Manufacturer's Warranty Certificate.
 
          F.No material will be considered as an equivalent to the porous pavement unit specified herein unless it meets all requirements of this specification, without exception. Manufacturers seeking to supply equivalent material must submit records, data, independent test results, samples, certifications, and documentation deemed necessary by the Engineer to prove equivalency. The Engineer shall approve or disapprove other Manufacturers materials in accordance with the General Conditions after submission and review of provided information. All substitute materials submitted shall be subject to independent lab testing at the contractor's expense.
 
          1.7QUALITY ASSURANCE AND CONTROL
 
          A.Porous Pavement System shall be provided from a single Manufacturer for the entire project.
 
          B.The Manufacturer's Quality management system shall be certified and in accordance with ISO 9001:2015. Substitute materials submitted shall provide a certification that the manufacturing process is part of an ISO program. Certification is required specifically stating that their testing facility is certified and in accordance with ISO. An ISO certification for the substitute material will not be acceptable unless it is proven it pertains specifically to the manufacturing operations.
 
          C.The Manufacturer shall provide certification of compliance to all applicable testing procedures and related specifications upon the customer's written request. Request for certification shall be submitted no later than the date of order placement. The Manufacturer shall have a minimum of 20 years' experience producing porous pavement systems.
 
          D.Specifier Note: Delete requirement for pre-installation meeting if not required.
 
          E.Pre-Installation Meeting: Prior to installation of any materials, conduct a pre-installation meeting to discuss the scope of work and review installation requirements. The pre-installation meeting shall be attended by all parties involved in the installation of the porous pavement system.
 
          F.Specifier Note: Delete the next three paragraphs if Manufacturer's Field Representative is not required.
          1.Manufacturer shall provide a qualified field representative on site at the start of construction to ensure the system is installed in accordance with the Contract Documents.
          2.Manufacturer's field representative shall have a minimum of 5 years installation experience with the specified products in the specified application.
          3.Manufacturer of any substitute materials to be used shall certify that a representative can meet the above criteria and will be on site for initial construction start up. Manufacturers other than the specified porous pavement system will be required to provide proof the representative meets these qualifications.
 
          1.8DELIVERY, STORAGE, AND HANDLING
 
          A.Deliver materials to site in manufacturer's original, unopened containers and packaging, with labels clearly identifying product name and manufacturer.
 
          B.Storage: Store materials in accordance with manufacturer's instructions. Protect all materials from damage and out of direct sunlight.
 
          C.Handling: Protect materials during handling and installation to prevent damage.
 
          1.9WARRANTY
          ** NOTE TO SPECIFIER ** Contact the Porous Paving System manufacturer for additional details.
 
          A.The Manufacturer warrants each porous pavement unit that it ships to be free from defects in materials and workmanship at the time of manufacture. The Manufacturer's exclusive liability under this warranty or otherwise will be to furnish without charge to the original f.o.b. point a replacement for any section which proves to be defective under normal use and service during the 10 year period which begins on the date of shipment. The Manufacturer reserves the right to inspect any allegedly defective section to verify the defect and ascertain its cause.
 
          B.This warranty shall not cover defects attributable to causes or occurrences beyond the Manufacturer's control and unrelated to the manufacturing process, including, but not limited to, abuse, misuse, mishandling, neglect, improper storage, improper installation, improper alteration, or improper application.
 
          C.In no event shall the Manufacturer be liable for any special, indirect, incidental, or consequential damages for the breach of any express or implied warranty or for any other reason, including negligence, in connection with the porous pavement system.
 
          PART 2PRODUCTS
 
          2.1MANUFACTURERS
 
          A.Acceptable Manufacturer: Presto Geosystems, which is located at: 670 N. Perkins St. P. O. Box 2399; Appleton, WI 54912-2399; Toll Free Tel: 800-548-3424; Tel: 920-736-1336; Fax: 920-738-1222; Email: request info; Web: http://www.prestogeo.com
          ** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
          B.Substitutions: Not permitted.
 
          C.Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
 
          2.2POROUS PAVING UNITS
          ** NOTE TO SPECIFIER ** SelectGeoBlock®, GeoBlock®5150, or GeoPave from the following paragraphs and delete paragraphs not applicable. GeoBlock® or GeoBlock®5150 provides pedestrian and vehicular load support over grassed areas with appropriate engineered base of topsoil/aggregate mix. Vehicles should be limited to vehicles with a maximum tire pressure of 90 psi.
 
          A.GeoBlock Units:
          1.Base Materials:
          a.Polyethylene: Up to 100 percent recycled materials.
          b.Color: Ranges from dark shades of gray to black.
          c.Color Uniformity: Uniform color throughout all units in pallet.
          d.Chemical Resistance: Superior.
          e.Carbon Black for Ultraviolet Light Stabilization: 1.5 to 2.0 percent by weight through addition of a carrier in accordance with ASTM D1693.
          2.Performance Properties:
          a.Empty unit minimum crush strength at 70 degrees F (21 degrees C) shall be 420 psi (2,900 kPa).
          b.Sand-filled unit minimum crush strength at 70 degrees F (21 degrees C) shall be 5,980 psi (41,285 kPa).
          c.Flexural modulus at 70 degrees F (21 degrees C) shall be 35,000 psi (240,000 kPa).
          d.Unit minimum deflection without breakage when units supported at 40 inches (0.50 m) centers at 70 degrees F (21 degrees C) shall be 1.0 inches (25 mm).
          e.Wall compressive strength (simulated tire area loaded) shall be 420 psi (2,900 kPa) when tested using circular plate, 6.5 inches (165 mm) in diameter, and loaded to failure.
          f.Wall compressive strength (full porous pavement unit loaded) shall be 138,240 lbsf (615 kN) when tested using full single unit loaded to failure via flat plate.
          g.Equivalent elastic stiffness shall be 48,000 lbs-sq inches (140 N-sq m) when tested using simply supported porous pavement unit loaded to 1 inch (25 mm) deflection.
          h.Joint shear strength shall be 20,000 lbsf (89.0 kN) when tested using direct shear of tabular connection using special apparatus.
          3.Dimensions:
          a.Nominal Width: 20 inches (0.5 m).
          b.Nominal Length: 40 inches (1.00 m).
          c.Nominal Depth: 1.2 inches (30 mm).
          d.Nominal Coverage Area: 5.3 sq ft (0.50 sq m).
          e.Nominal product weight: 4.7 lbs (2.1 kg).
          f.Cells per Unit: 182 cells.
          1)Nominal Cell Size: 2.25 by 2.25 inches (57 by 57 mm).
          g.Top Open Area per Unit: 88 percent.
          h.Bottom Open Area per Unit: 56 percent.
          i.Interlocking Offset Tabs: No interlocking offset tabs on the edges of units.
 
          B.GeoBlock 5150:
          1.Base Materials:
          a.Polyethylene: Up to 100 percent recycled materials.
          b.Color: Ranges from dark shades of gray to black.
          c.Color Uniformity: Uniform color throughout all units in pallet.
          d.Chemical Resistance: Superior.
          e.Carbon Black for Ultraviolet Light Stabilization: 1.5 to 2.0 percent weight through addition of a carrier in accordance with ASTM D1693.
          2.Performance Properties:
          a.Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 420 psi (2,900 kPa).
          b.Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 7,058 psi (48,734 KPa).
          c.Flexural Modulus at 70 degrees F (21 degrees C): 35,000 psi (240,000 kPa).
          d.Minimum Deflection without breakage when units supported at 40 inch (0.50 m) centers at 70 degrees F (21 degrees C): 1.0 inch (25 mm).
          e.Wall Compressive Strength (Simulated Tire Area Loaded): 420 psi (2,900 kPa) when tested using circular plate, 6.5 inches (165 mm) diameter, loaded to failure.
          f.Wall Compressive Strength (Full Porous Paving Unit Loaded): 138,240 lbsf (615 kN) when tested using full single unit loaded to failure via flat plate.
          g.Equivalent Elastic Stiffness: 48,000 lbs-sq inches (140 N-sq m) when tested using simply supported porous paving unit loaded to 1 inch (25 mm) deflection.
          h.Joint Shear Strength: 20,000 lbs-force (89.0 kN) when tested using direct shear of tabular connection using special apparatus.
          3.Dimensions:
          a.Nominal Width by Length: 20 by 40 inches (0.5 by 1.0 m).
          b.Nominal Depth: 2 inches (50 mm).
          c.Nominal Coverage Area: 5.3 sq ft (0.50 sq m).
          d.Cells per Unit: 72.
          e.Cell Size: 3.1 by 3.2 inches (79 by 81 mm).
          f.Top Open Area per Unit: 87 percent.
          g.Bottom Open Area per Unit: 41 percent.
          h.Interlocking Offset Tabs: 12 tabs per 40 inches (meter). Tab system on all edges of unit.
          ** NOTE TO SPECIFIER ** GeoPave with aggregate or an aggregate/topsoil engineered infill provides a permeable, stabilized surface for vehicular and pedestrian load support.
 
          C.GeoPave Units:
          1.Base Materials:
          a.Polyethylene: Up to 100 percent recycled materials.
          b.Color: Ranges from dark shades of gray to black.
          c.Color Uniformity: Uniform color throughout all units in pallet.
          d.Chemical Resistance: Superior.
          e.Carbon Black for Ultraviolet Light Stabilization: 1.5 to 2.0 percent by weight through addition of a carrier in accordance with ASTM D1693.
          2.Performance Properties:
          a.Empty Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 175 psi (1,202 kPa).
          b.Aggregate or Aggregate/Topsoil Infilled Unit Minimum Crush Strength at 70 degrees F (21 degrees C): 5,160 psi (35,625 kPa).
          c.Empty Unit Wall Compressive Strength (Simulated Loaded Tire Area): 175 psi (1,202 kPa).
          1)Test Procedure: Full single unit loaded to failure via 9 inches (228.6 mm) flat plate.
          d.Aggregate or Aggregate/Topsoil Filled Unit Wall Compressive Strength (Simulated Tire Area Loaded): 138,240 lbsf (615 kN).
          1)Test Procedure: Full single unit loaded to failure via 9 inches (228.6 mm) flat plate.
          3.Dimensions:
          a.Nominal Width by Length: 20 inches (0.50 m).
          b.Nominal Length: 40 inches (1.0 meter).
          c.Nominal Depth: 2.0 inches (50 mm).
          d.Nominal Coverage Area: 5.38 sq ft (0.50 sq m).
          1)Cell Size (small cell): 3.25 by 3.25 inches (83 by 83 mm).
          2)Cell Size (large cell): 3.25 by 6.50 inches (83 by 165 mm).
          e.Nominal Weight per Unit: 7.6 lbs (3.4 kg).
          f.Top of Panel Open Area: 90.5 percent.
          g.Bottom of Panel Open Area: 32.6 percent.
          h.Bottom Mesh Openings: 0.25 by 0.25 inches (6.35 by 6.35 mm).
          4.GeoPave U-Clip Connectors: 12 gauge G90 zinc plated steel locking clip with internal barbs to connect two adjacent GeoPave units. No other connection device shall be used.
          ** NOTE TO SPECIFIER ** Delete GeoPave delineator if not required
          5.GeoPave SNAP Delineators: Fabricated of UV-resistant polymer with a diamond plate, non-skid pattern on the surface. SNAP Delineators are connected with locking tabs designed to fit in the GeoPave porous pavement square or rectangular cells.
 
          PART 3EXECUTION
 
          3.1EXAMINATION
 
          A.Before beginning installation, verify site conditions are as indicated on the Drawings.
 
          B.Ensure that structure and adjacent hard-surfaced paving work is completed before installing porous pavement system.
 
          C.Notify the Architect/Engineer if site conditions are not acceptable. Do not begin preparation or installation until unacceptable conditions have been corrected.
 
          3.2PREPARATION
 
          3.3Specifier Note: If required, specify the number of days required for the on-site manufacturer's field representative. Delete paragraph if not required.
 
          A.Field Representation:
          1.On-site time for installation assistance by the Manufacturer's field representative shall be ____ days with one trip. All travel and expense costs for Manufacturer's field representative installation assistance shall be included in the base bid price.
          ** NOTE TO SPECIFIER ** Coordinate following paragraphs with work provided by others.
 
          B.Subgrade:
          1.Prepare subgrade and install porous pavement system in accordance with the Drawings and Manufacturer's instructions.
          2.Subgrade Preparation:
          a.Excavate and shape foundation soils as indicated on the Drawings.
          b.Ensure foundation soil meets minimum strength requirements through proof rolling or other conventional method and is approved by the Engineer. If unacceptable foundation soils are encountered, excavate, and replace with suitable quality material as directed by the Engineer.
          c.Specifier Note: Delete this section if a geotextile separation layer is not required.
          d.Install geotextile separation layer on prepared surfaces ensuring required overlaps are maintained and outer edges of the geotextile are buried in accordance with the Manufacturer's recommendations and sub grade CBR.
          ** NOTE TO SPECIFIER ** Delete base preparation paragraph if not required.
 
          C.Base Preparation GeoBlock or GeoBlock 5150:
          ** NOTE TO SPECIFIER ** The strength of the porous pavement system is determined, in part, by the support provided by the topsoil/aggregate engineered base. Consult Presto Geosystems GeoBlock® Design and Construction Overview for engineered base details and thickness recommendations.
 
          D.Proper topsoil/aggregate engineered base materials will promote vegetative growth and provide required structural support. If the topsoil is not present within the engineered base, grass growth may be impaired. Vegetated surfaces should be designed for infrequent or occasional traffic.
          1.Install base as specified. Verify engineered base is installed in accordance with porous pavement system Manufacturer's instructions.
          2.Coordinate base installation and preparation with subdrains specified in Section 33 46 13.13 - Foundation Drainage Piping.
          3.If required, install the specified sub-drain and outlet according to construction drawings.
          4.Place engineered base to a depth of ___ inches (___ mm) as indicated on the Drawings.
          5.Place engineered base open graded crushed rock having an AASHTO No. 5 or similar designation homogenously blended with topsoil.
          a.Ensure aggregate portion of base is free from fines and has 30 percent or more void-space when compacted.
          b.Particle size should range in size from 0.375 to 1.0 inch (9.5 to 25 mm).
          c.Add and blend topsoil before placement equal to void percentage in aggregate.
          d.Pulverized topsoil portion shall equal to 33 percent of the total volume and be added and blended to produce a homogenous mixture prior to placement.
          e.Compact the mixture to the Architect/Engineer's specifications.
          6.Constrain the edges of the base appropriately to prevent movement.
          ** NOTE TO SPECIFIER ** Delete base preparation paragraph if not required.
 
          E.Base Preparation GeoPave:
          ** NOTE TO SPECIFIER ** The strength of the porous pavement system is determined, in part, by the support provided by the aggregate or aggregate/topsoil engineered base. Consult Presto Geosystems' GeoPave® Design and Construction Overview for base details and thickness recommendations. The Engineer shall design the base to ensure stability of the open graded material.
 
          F.A minimum of 2 inches (50 mm) of base material is generally recommended for drainage even if not required by design for load support. Additional base depth may be added if required over a low-permeable base or to function as a storm water detention/retention layer.
 
          G.For vegetated systems, proper aggregate/topsoil engineered base materials will promote vegetative growth and provide required structural support. If the topsoil is not present within the engineered base, grass growth may be impaired. Vegetated surfaces should be designed for infrequent or occasional traffic with a maximum H-10 loading.
          1.Install base as specified. Verify base is installed in accordance with porous paving system Manufacturer's instructions.
          2.If required, place the geotextile separation layer as specified in the contract documents between the natural ground and the specified base.
          3.If required, install the specified sub-drain and outlet according to contract documents.
          ** NOTE TO SPECIFIER ** Specifier Notes: The following applies to aggregate systems. Complete the base depth section. Delete the following items if the surface will be vegetated.
          4.For aggregate systems, place aggregate base to a depth of ___ inches (___ mm), or as specified in the contract documents.
          a.Base shall be an open graded crushed aggregate with a particle range from 0.375 inch to 1.0 inch (10 mm to 25 mm) and a fine content less than 5 percent.
          b.Compact the aggregate to the Engineer's specifications. After compaction, the surface shall be uniform with no protrusions from larger aggregate particles.
          ** NOTE TO SPECIFIER ** Specifier Notes: The following applies to vegetated systems. Complete the base depth section. Delete the following items if the surface will be aggregate.
          5.For vegetated systems, place aggregate/topsoil engineered base to a depth of ___ inches (___ mm), or as specified in the contract documents.
          a.Place engineered base of open graded crushed aggregate homogenously blended with pulverized topsoil and a void component generally containing air and/or water.
          b.Ensure aggregate portion of base is free from fines and has a known percentage void-space of 30 percent or greater when compacted. Particle size should range in size from 0.375 inch to 1.0 inch (10 mm to 25 mm), with a D50 of 0.5 inch (13 mm).
          c.Add and blend topsoil before placement equal to void percentage in aggregate.
          d.The pulverized topsoil portion shall equal 33 percent of the total volume and be added and blended to produce a homogenous mixture prior to placement.
          e.Compact the mixture to the Engineer's specifications.
          f.Constrain the edges of the base appropriately to prevent movement.
          ** NOTE TO SPECIFIER ** Delete article if not required.
 
          3.4POROUS PAVEMENT INSTALLATION (GEOBLOCK OR GEOBLOCK 5150)
 
          A.Install and infill porous pavement units in accordance with porous paving system manufacturer's instructions.
          1.Ensure all adjacent hard-surfaced paving work is completed before installing the porous pavement system.
          2.Units are capable of bearing load immediately after placement, once fully installed and the base depth is appropriate to support the loading. Porous pavement units can be driven on with no infill necessary. No barriers are required to prevent passenger cars and trucks or construction equipment from driving on porous pavement units during installation.
 
          B.Installing Porous Pavement Units:
          ** NOTE TO SPECIFIER ** Edit the following paragraphs as required for paving pattern.
          1.Place units with square hole to ground.
          2.Lay units is the following pattern:
          ** NOTE TO SPECIFIER ** Select bond pattern required and delete paragraphs not required.
          a.Install unit pattern as indicated on the Drawings.
          b.Standard running bond bricklayer pattern for pedestrian access lane or one-direction vehicular driveway applications.
          c.Herring bone pattern for large area with multi-directional traffic flow.
          3.For bricklayer pattern, place units with long direction of unit perpendicular to direction of traffic.
          4.Develop staggered herringbone pattern by using half units made by field cutting a full unit.
          5.Field cut units to custom fit contours and around obstructions. Edge restraints are required to create a closed "cell" that can be infilled. Alternatively, offset the GeoBlock units such that the coverage approximates the corner or curve feature. Edge restraints are required.
          6.Place first row of GeoBlock porous pavement units against a single stationary edge, when available. If the units are placed between two perpendicular stationary edges, allow for potential thermal expansion of the units by keeping the units away from the stationary edge.
          7.Slide units together so interlocking tab joint is fully engaged. Units shall not protrude above desired surface elevation.
          ** NOTE TO SPECIFIER ** Specify units to be fixed in place during the installation process if construction traffic may cause movement of the units during installation.
          8.The plastic has a relatively high rate of thermal expansion. Joint separation could occur and rejoining of separated units may be required. Once a healthy turf is developed, the root system will provide all necessary anchoring of the system.
          9.Prevent units from shifting during installation with placement of one of the following:
          a.Temporary wood stakes or permanent metal stakes through holes in the GeoBlock units.
          b.Thread-forming tapping screws through perimeter interlocking tabs. Install 2 to 4 screws on the long side and 1 to 2 screws on the short side. Refer to the GeoBlock Application and Installation Overview or consult Presto Geosystems for details.
          ** NOTE TO SPECIFIER ** Anchoring may be required when placing the GeoBlock® porous pavement units on a slope (5-10 percent maximum). Stake length is generally 12 inches (305 mm) or longer depending on the slope, subgrade CBR and loading requirement. Edit the anchor length as required. Delete this section if anchoring is not required.
 
          C.Anchoring of Porous Pavement Units:
          1.Place anchors in accordance with the manufacturer's recommendations.
          2.Anchor units in-place after installation of all the units within the defined area.
          3.Anchor Porous Pavement units with 0.5 inch (13 mm) No. 4 rebar or wood stakes to prevent movement of the units.
          4.Anchor length shall be 12 inches (300 mm) or as specified by the Engineer.
          5.Anchoring spacing shall be as indicated on the Drawings.
          6.Drive anchors through holes in the Porous Pavement units along the perimeter as required
 
          D.Infilling Porous Pavement Units:
          1.Infill units with pulverized topsoil immediately after units are installed.
          a.Runoff Coefficient is dependent upon the actual site conditions and GeoBlock porous pavement system infill material.
          b.Runoff Coefficient at 2.5 in/hr (64 mm/hr) rainfall shall be 0-0.15.
          c.Typical runoff coefficients range from 0 to 0.15 for sandy and clay soils, respectively.
          d.The actual run-off coefficient shall be based on site conditions, engineering judgment and the integrated effect of the drainage area.
          2.Spread topsoil infill uniformly over units to a level even with the top of the cell wall.
          3.Use spreading methods to prevent over-compaction of cell infill.
          4.Overfilling the cells is not recommended since vehicular loading will cause undesirable compaction of the topsoil.
          5.Broom or rotary sweep the infilled surface to remove the top portion of topsoil infill from the GeoBlock cells, so it has a meniscus appearance. Final topsoil placement should be slightly below the level of the GeoBlock cell wall.
          6.If final vegetation is sod, the GeoBlock porous pavement units shall be under-filled by sod depth to allow room to seat or press sod into GeoBlock porous pavement units.
          7.Topsoil: As specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
          ** NOTE TO SPECIFIER ** Delete article if not required.
 
          3.5POROUS PAVEMENT INSTALLATION (GEOPAVE)
 
          A.Install and infill units in accordance with porous paving system manufacturer's instructions.
          1.Verify that all adjacent hard-surfaced paving work is completed before installing porous pavement system.
          2.GeoPave units are capable of bearing load immediately after placement and once fully connected with UCLIPs. GeoPave porous pavement units can be driven on with no infill necessary. No barriers are required to prevent passenger cars and trucks or construction equipment from driving on the GeoPave porous pavement units during installation
 
          B.Installing Units:
          1.Place units with mesh bottom to ground.
          2.Lay units is the following pattern:
          ** NOTE TO SPECIFIER ** Select bond pattern required and delete paragraphs not required.
          a.Install unit pattern as indicated on the Drawings.
          b.Offset pattern for pedestrian access lane applications.
          c.Standard running bond bricklayer pattern for pedestrian and one direction access lane applications. Place units with long direction of unit perpendicular to direction of traffic.
          d.Herringbone pattern for large area with multi-directional traffic flow.
          3.For bricklayer pattern, place units with long direction of unit perpendicular to direction of traffic.
          4.Develop staggered herringbone pattern by using half units made by field cutting a full unit.
          5.Field cut units to custom fit contours and around obstructions. Edge restraints are required to create a closed "cell" that can be infilled. Alternatively offset the GeoPave units such that the coverage approximates the corner or curve feature. Edge restraints are required.
          6.Abut adjoining units to form the specified laying pattern. Units shall not protrude above desired surface elevation.
          7.Secure adjoining units together using the U-CLIP connection device. A total of 12 U-CLIPS are required for each unit. U-CLIPS shall be set in place by hammer in the half-wall locations such that adjacent sections have horizontally level profiles. U-CLIP locations are four on each unit long side and two on each unit short side.
          8.Place first row of GeoPave porous pavement units against a single stationary edge, when available. If the units are placed between two perpendicular stationary edges, allow for potential thermal expansion of the units by keeping the units away from the stationary edge.
          ** NOTE TO SPECIFIER ** Anchoring may be required when placing the GeoPave units on a slope of 5-10 percent maximum. Stake length is generally 12 inches (305 mm) or longer depending on the slope, subgrade CBR and loading requirement. Delete paragraph if not required.
 
          C.Anchoring of Units:
          1.Units shall be anchored in-place after installation of all the units within the defined area.
          2.Anchor units with 0.5 inch (13 mm) No. 4 rebar to prevent movement of the units.
          3.Anchor length shall be 12 inch (300 mm) or as specified by the Engineer.
          4.Anchors shall be placed per Manufacturer's recommendations.
          5.Drive the anchors through the GeoPave porous pavement unit cell-wall vent holes either in the middle of the units or along the perimeter as required.
          ** NOTE TO SPECIFIER ** Delineators may be required by local agencies for visual identification of parking spaces, drive lanes, center lines or other delineation. Delete the following items if delineation is not required.
 
          D.GeoPave SNAP Delineators:
          1.Insert GeoPave SNAP delineators into the GeoPave unit's square or rectangular cells to mark delineation.
          2.GeoPave SNAP delineators are placed after installation of the GeoPave porous pavement units and before installation of the infill material.
          a.If the SNAP delineators are desired after infill placement, infill may be removed with a vacuum to allow insertion of delineators at select locations.
          3.Place density of the GeoPave SNAP delineators to meet visual and local agency requirements.
          ** NOTE TO SPECIFIER ** The following applies to aggregate systems. Delete the following items if the infill will be topsoil/aggregate for vegetation.
 
          E.Infilling Units - Aggregate Systems:
          1.Infill units with specified aggregate fill.
          2.The aggregate infill shall be a well-graded 0.375 inch to 0.5 inch (10 mm to 13 mm) open graded crushed angular stone with a fine content less than 5 percent.
          a.Runoff Coefficient is dependent upon the actual site conditions and GeoPave porous pavement system infill material.
          b.For aggregate areas, typical run-off coefficients range from 0 to 0.15 for sandy and clay soils, respectively.
          c.The actual run-off coefficient shall be based on site conditions, engineering judgment and the integrated effect of the drainage area.
          3.Spread aggregate infill uniformly over the units with a skid steer, small tractor, or small loader. Overfill the cells to allow for settlement of the infill. Overfill height shall be determined by the size of the infill material.
          4.Hand rake the aggregate to assure that the aggregate fill is at the top of the cell walls.
          ** NOTE TO SPECIFIER ** The following applies to vegetated systems. Delete the following items if the infill will be aggregate.
 
          F.Infilling Units - Vegetated Systems:
          1.Infill units with the specified aggregate/topsoil engineered infill.
          2.The aggregate/topsoil engineered infill shall consist of a homogenous mixture consisting of:
          a.A clear-stone/crushed rock having an AASHTO No. 5, or similar designation blended with
          b.Pulverized topsoil and
          c.A void component generally containing air and/or water.
          3.This homogenous mixture will promote vegetative growth and provide required structural support. The aggregate portion shall have a particle range from 0.375 inch to 0.5 inch (10 mm to 13 mm). The percentage void-space of the aggregate portion shall be at least 30 percent. The pulverized topsoil shall equal 33 percent of the total volume and be added and blended to produce a homogenous mixture prior to placement.
          a.Runoff Coefficient is dependent upon the actual site conditions and GeoPave porous pavement system infill material.
          b.For vegetated areas, typical run-off coefficients range from 0.10 to 0.35 for sandy and clay soils, respectively.
          c.The actual run-off coefficient shall be based on site conditions, engineering judgment and the integrated effect of the drainage area.
          4.Spread aggregate/topsoil engineered infill uniformly over units to a level even with the top of the cell wall.
          5.If final vegetation is sod, the GeoPave porous pavement units shall be under-filled by 1.0 inch (25 mm) to allow room to seat or press sod into GeoPave porous pavement units.
          6.Use spreading methods to prevent over-compaction of the infill.
          7.Topsoil and Seed: As specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
 
          3.6ABOVE GROUND, POST-INSTALLATION DELINEATION
          ** NOTE TO SPECIFIER** With vegetated systems, once healthy turf has been established, the cell wall structure will have minimal visibility when good turf-maintenance practices are followed. Delineation may be desirable to create greater visibility for those using the access lanes.
 
          A.Above Ground Post-Installation Delineation: Delineate the installed porous pavement system with the following method:
          1.Above-ground curbing.
          2.Shrubbery or vegetation.
          3.Perimeter lighting.
          4.Delineation markers.
 
          3.7SEED AND GRASSING (GEOBLOCK OR GEOBLOCK 5150)
 
          A.Finish in accordance with Manufacturer's instructions.
          ** NOTE TO SPECIFIER ** Delete seeding or sodding, whichever is not required. Specify sod for areas where immediate use is desired.
 
          B.Seeding:
          1.The seed mix shall be as shown on the drawings or as specified in the Contract Documents.
          2.Follow good seeding, fertilizing, and watering procedures for turf establishment based on regional practices as specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
          3.Seed shall conform with the requirements of the governing authority for seeding and restrictions on noxious weed seed.
 
          C.Sodding:
          1.The sod shall be free from netting material, and as specified in the Contract Documents.
          2.Sweep out topsoil from the GeoBlock units to allow room to seat the sod. Remove enough topsoil so that the crown of the sod is recessed slightly below the top of the cell after pressing the sod in place, and so the bottom of the sod is in contact with the topsoil.
          3.Install sod free from netting materials. The sod shall consist of dense, well-rooted growth of permanent and desirable grasses, indigenous to the locality where it will be installed.
          4.Press sod into partially emptied cells using a roller or other suitable equipment.
          5.Follow recommended watering procedures to ensure healthy sod growth.
          6.Sodding: As specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
 
          3.8FINISHING (GEOPAVE)
 
          A.Finish in accordance with Manufacturer's instructions.
          ** NOTE TO SPECIFIER ** Delete seeding or sodding, whichever is not required or delete both. Seeding and Sodding apply only to vegetated systems and should be deleted for aggregate systems. Specify sod for areas where immediate use is desired.
 
          B.Seeding:
          1.The seed mix shall be as shown on the drawings or as specified in the contract documents.
          2.Follow good seeding, fertilizing, and watering procedures for turf establishment based on regional practices as specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
          3.Seed shall conform with the requirements of the governing authority for seeding and restrictions on noxious weed seed.
          4.Increase water frequency when free draining base materials are used.
 
          C.Sod:
          1.The sod shall be free from netting material, and as specified in the contract documents.
          2.Ensure units are under-filled to allow room to seat the sod.
          3.Install young sod free from netting materials. The sod should consist of dense, well-rooted growth of permanent and desirable grasses, indigenous to the locality where it will be installed.
          4.Press sod into partially emptied cells using a roller or other suitable equipment and follow normal watering procedures.
          5.Sod: As specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
 
          3.9MAINTENANCE
 
          A.Maintain grass in accordance with manufacturer's instructions and as specified in Section 32 92 13 - Hydro-Mulching Manufacturers of Turfs and Grasses.
          ** NOTE TO SPECIFIER ** Lawn Care applies only to vegetated systems and should be deleted for aggregate systems.
 
          B.Lawn Care: Normal turf care procedures should be followed, including de-thatching and aerating. Some equipment may slightly scar or cut the GeoBlock wall structure during some operations but will not affect overall structural integrity of the system.
          ** NOTE TO SPECIFIER ** Snow Removal applies to climates where snow removal is required. When deeper ground freeze occurs, the system functions as a typical hard pavement surface. If a sharp metal plow-blade comes in direct contact with the surface during plowing, any portion of the GeoBlock® porous pavement system that protrudes above the normal surface level could be damaged or removed by the blade.
 
          C.Snow Removal: Remove snow using one of the following basic procedures:
          1.Metal edged plow blade a minimum of 1.0 inch (25 mm) above surface during plowing operations.
          2.Plow blade with a flexible rubber edge.
          3.Plow blade with skids on the lower outside corners so the plow blade does not come in contact with the units.
          ** NOTE TO SPECIFIER ** Edit the following paragraph to suit the level of Field Quality Control required. Coordinated with the requirements of Section 01 45 16.13 - Contractor Quality Control Delete entirely if not required.
 
          3.10FIELD QUALITY CONTROL
 
          A.Provide Field Quality Control in accordance with the requirements of Section 01 45 16.13 - Contractor Quality Control
 
          B.Manufacturer shall provide a qualified field representative on site to ensure the system is installed in accordance with the Contract Document and as follows:
          1.Attend Preinstallation meeting.
          2.Provide certification of compliance to all applicable testing procedures and related specifications.
          ** NOTE TO SPECIFIER ** Specify the number of days and number of trips required for the on-site manufacturer's field representative.
          3.On-site time for installation assistance by the Manufacturer's field representative shall be ____ days with ___ trips.
 
         
END OF SECTION