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- „ 5639� !continued from page 7) ensure that the root 3ystem is welI established.Seeding allows provides for;ood drainage at the surface and makes the firelane or total customization of plant selection and eliminates possible con- parking area not onIy sa.fer but more durable.Do a site inapection tamination of the root zone&om clay based or high peat content when the ba�e is installed to ensure the depths aze accurate and sod,both problems with high use areas. drainage is effec�ve. 92%Root Area and 100°/a 6rass Coverage Base Course Desiqn Our installations are hard to find because they are invisible! Calculating the depth and composition of materiaIs for the base With so little plas�ic near the crown of the grass, the blades of course incorporates the same design criteria as for other pavements: grass are aot smashed by product. Roat development is not inter- • load bearing capacity of native(or filli subsoil rupted from spreading laterally.The rings are sttong and rigid, • plasticity or impact of moisiure on keeping grass root systems protected strength and longevity from harm.The roats grow directly • &ost heave potential �� downward aad deeply into the sandy • traffic load, frequency and�or duration. , � � , ' c��,� .� gravel base course. Grass pave2 b y �� y `�� ` Invisible Structures is,by faz,the best +r ' � � ��. i�s n��w}1"tl�y^Sd�.�,� .,p�l 1/•' Sample Base Course Depths �; , �;}�4 y�; �� ,�� �'",�/.,s�i4 r .k N„ .{. -r -+,�a. �i Passible"Iivin�'paving surface �oµ r f't r ti , � P l e a s e c o n s u l t w i t h a s o i l s e n g i n e e r S�. � r•�t�� : � desi ed b a landsca e architect. .'�t�� ,��,�. � :� �:�• r �. ...a;;;r;�r:v:;.,.,� :.{:;� � Y P for site-specific base requirements. „a��' " ��v;� � Generall , �� y the depth that is used under �`'{`' Grasspave2 Uniqueness asphalt will be the reuuirement under • Large roils for fast installatian — 10 GrassDay�2. Goif carts and pedestrian to 225 mZ traffic may require aothing over sandy DupantCenw,lrvbrS,fA—Frred�pmbnmtt�ngof • 92°lo root area for best grass grawth gravel soils,and just 2"to 4"(5-10 cm) 6rasspavezwlthsan�B!ledringstadetermioestabiUryof • Strong rigid rings that conform to over very weak soils.Cars usually need oatr(ggers when(adaerwar ezcmded Bduw;F�nione undulating terrain with 4"to 8"(10-20 cm). Buses,trucks,and fire f�ON'�►1�Q��narr�edth�/anduapingand Q�ble grid between rings trucks can easily require 8"to 12"(20-30 softtn�theappmronaofthls bullAing. • 100�o recycled post-consumer plastic cm)or more.The use of geotextiles, , g � q grow — polymer,fertiIizer,soil though not required,below the base will amendment provided &ee prevent integration with subsoils and is :,� � • Rolls can be cut and shaped with strongly advised in areas of clay or silt '�;: ' ;.�I;�;;,' Pruning shears soils and &�ost heave. _:,;�; CSI Grants Spedfiwtion Number Fil(ing Grasspave2 with Topsoi! on9sPoroasPavin9- Recognition by CSI !S Utiwis2 has helped establish Iegitimacy to the Remember that we are building a road- porous(grass and gravel)paving indus- way with grass as the surface.hlaintaining poroaity for air and tries.Now we can aIl agree on 02795!As designers expand their water movement is very impoxtant.�Vhen organic,clay or silt use aad acceptance of porous paving,the industry will grow. particles are in the rings,compaction can take place within ttre small cells, defeating the structure, and restricting accesa by air Creativity With Hard Surface Pavers and water to roots. Growing grass in 3and over a sandy gravel Ideas include:Cambine GrasspaveZ with flush paths,pads or mark• road base is more difficult to get established, but borticulturally ers of concrete in a frelane fQr pedestrian traffic,desi;n elements and atructurally it works!If rufi�should appear in a finished ar deIineatioa;use brick pathways through the grass;fill the rings installation,topsoil haa been used either under the rings or within ��other plant materials such as daisies and ground cocers;lay ihe rings,contrary to our installation instruc�ions. strips of eoncrete to define parldng area3,eapecially handicapped parking;checkerboards of grass and pavers or other patterns to Seeding GrasspaveZ Is Popular be e�joyed�om high-rise offices;design of compaay Iogos in the In California and other temperate climate zoaes many of our pazking lots or firelanes with polymer-bound colored stone;nanow instaIlations are seeded. Waiting for a period of two mowings will residential streets with guest parking on grass shoulders.