Technical Resource Guide_WEB_BEL25-D-516650 - Page 22 of 84

22 | belgard ® product installation guide | belgard.com | 877-235-4273 Compacted Dense-graded Aggregate Base, minimum 8" thick. Asphalt or cement treatment base can be used over weak or saturated subgrade soils. 1" Bedding Layer, conforming to ASTM C33 with maximum 1% passing the No. 200 Sieve. Geotextile separation fabric on entire bottom and sides of aggregate base Plastic or metal edge restraint with ½” dia x 12” long galv steel anchoring pin Belgard Turfstone Topsoil Infill Compacted Subgrade. Prepare according to recommendations in the geotechnical report. Base extends minimum 12" beyond grid perimeter Design Notes: 1. Cross section as shown is suitable for light vehicular applications, including parking lots, emergency access or residential driveways. 2. Depth of aggregate base subject to site specific conditions (traffic loading, soil conditions, groundwater levels, climatic conditions). 3. An edge restraint for all Turfstone applications is required. Commercial vehicular applications should utilize a 6" wide concrete curb for containment. This drawing is for illustrative purposes only and should not be used for construction without the signature of a registered professional engineer. Scale: Drawn by: Date: Drawing number: belgard.com 877-235-4273 Belgard Grid Paving Detail N.T.S. PCC Turfstone Installation Guidelines Turfstone is a concrete grid pavement used to create "green" pathways capable of supporting infrequent vehicular traffic. Turfstone is an acceptable solution for emergency access lanes and occasional fire truck loading if properly designed. The minimum dense-graded aggregate base thickness should be 8”. Open-graded aggregate is not recommended. The following additional design and installation recommendations are suggested for any Turfstone project: • Slope applications should be limited to 8:1 or 12.5% for vehicular applications. • Subgrade shall be compacted to 95% of standard Proctor density. • Base shall be dense-graded aggregate in accordance with local road base criteria and shall be compacted to 98% standard Proctor density. • A drainage geotextile should be installed to separate the subgrade from the base material and side walls. • A 1" thick leveling sand bed shall be used to set the Turfstone grid units with a nominal joint spacing between 1/8" and 1/4". The units should not be touching each other. • Infill typically consists of topsoil. Irrigation is recommended to establish and maintain healthy grass cover. Sweep topsoil into the joints and voids and vibrate until completely filled. Topsoil should be re-applied if needed after initial consolidation. Aggregate infill instead of topsoil may be suitable in some applications. • Grass infill should not be exposed to tire traffic until it is well established. • An edge restraint for all Turfstone applications is required.