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Resolution 5639
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Reso 0001-7499
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Reso 5600 - 5699 (April 25, 2007 - December 3, 2007)
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Resolution 5639
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(continued from page 7) <br />provides for good drainage at the surface and makes the firelane or <br />parking area not only safer but more durable. Do a site inspection <br />when the base is installed to ensure the depths are accurate and <br />drainage is effective. <br />Base Course Design <br />Calculating the depth and composition of materials for the base <br />course incorporates the same design criteria as for other pavements: <br />• load bearing capacity of native (or fill) subsoil <br />• plasticity or impact of moisture on <br />strength and longevity <br />• frost heave potential <br />• traffic load, frequency andor duration. <br />Sample Base Course Depths <br />Please consult with a soils engineer <br />for site-specific base requirements. <br />Generally, the depth that is used under <br />asphalt will be the requirement under <br />Grasspave2. Golf carts and pedestrian <br />traffic may require nothing over sandy <br />gravel soils, and just 2" to 4" (5-10 cm) <br />over very weak soils. Cars usually need <br />4" to 8" (10.20 cm). Buses, trucks, and fire <br />trucks can easily require 8" to 12" (20.30 <br />cm) or more. The use of geotextiles, <br />though not required, below the base will <br />prevent integration with subsoils and is <br />strongly advised in areas of clay or silt <br />soils and frost heave. <br />Filling Grasspave2 with Topsoil <br />Is Unwise <br />Remember that we are building a road- <br />way with grass as the surface. Maintaining porosity for air and <br />water movement is very important. When organic, clay or silt <br />particles are in the rings, compaction can take place within the <br />small cells, defeating the structure, and restricting access by air <br />and water to roots. Growing grass in sand over a sandy gravel <br />road base is more difficult to get established, but horticulturally <br />and structurally it works! If ruts should appear in a finished <br />installation, topsoil has been used either under the rings or within <br />the rings, contrary to our installation instructions. <br />5639 <br />ensure that the root system is well established. Seeding allows <br />total customization of plant selection and eliminates possible con- <br />tamination of the root zone from clay based or high peat content <br />sod, both problems with high use areas. <br />92% Root Area and 100% Grass Coverage <br />Our installations are hard to find because they are invisible! <br />With so little plastic near the crown of the grass, the blades of <br />grass are not smashed by product. Root development is not inter- <br />rupted from spreading laterally. The rings are strong and rigid, <br />Dupont Center, Irvine, U —Fre department testing of <br />Grostpavez with sand -filled dogs to determine stability of <br />outriggers when ladderwar extended Below. rirelane <br />shown years later. Grass enhanced Me landscaping and <br />softened the appearance of this building. <br />Seeding Grasspave2 Is Popular <br />In California and other temperate climate zones many of our <br />installations are seeded. Waiting for a period of two mowings will <br />keeping grass root systems protected <br />from harm. The roots grow directly <br />downward and deeply into the sandy <br />gravel base course. Grasspave2 by <br />Invisible Structures is, by far, the best <br />possible "living" paving surface <br />designed by a landscape architect. <br />Grasspave2 Uniqueness <br />• Large rolls for fast installation — 10 <br />to 125 m2 <br />• 92% root area for best grass growth <br />• Strong rigid rings that conform to <br />undulating terrain with <br />flexible grid between rings <br />• 100% recycled post -consumer plastic <br />• Hydrogrow — polymer, fertilizer, soil <br />amendment provided free <br />• Rolls can be cut and shaped with <br />pruning shears <br />CSI Grants Specification Number <br />0179SParousftng — Recognition by CSI <br />has helped establish legitimacy to the <br />porous (grass and gravel) paving indus- <br />tries. Now we can all agree on 02795! As designers expand their <br />use and acceptance of porous paving, the industry will grow. <br />Creativity With Hard Surface Pavers <br />Ideas include: Combine Grasspave2 with flush paths, pads or mark- <br />ers of concrete in a firelane for pedestrian traffic, design elements <br />or delineation; use brick pathways through the grass; fill the rings <br />with other plant materials such as daisies and ground covers; lay <br />strips of concrete to define parking areas, especially handicapped <br />parking; checkerboards of grass and pavers or other patterns to <br />be enjoyed from high-rise offices; design of company logos in the <br />parking lots or frelanes with polymer -bound colored stone; narrow <br />residential streets with guest parking on grass shoulders. <br />
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