_GP2_Specs_Final.pdf

SPECIFICATIONS

Renovate Eco-Parking

International Institute of Tropical Forestry

Rio Piedras, Puerto Rico

US Forest Service 1720 Peachtree Road, NW, Suite 876 South

Atlanta, GA 30309-2405

Prepared By:

GUILLERMO APONTE, MAY 2023

SECTION 321243

POROUS FLEXIBLE PARKING SURFACE

(Formerly 02795 Porous Paving)

PART 1 GENERAL

1.1 SECTION INCLUDES

A.

Porous flexible parking surface.

1.2

Deleted

1.3 REFERENCES

A. ASTM F 1951-08 Standard Specification for Determination of Accessibility of Surface Systems Under and

Around Playground Equipment.

B. ASTM D 638-10 Standard Test Method for Tensile Properties of Plastics C. ASTM C 33 Standard Specification for Concrete Aggregates D. AASHTO M6 Standard Specification for Fine Aggregate for Hydraulic Cement Concrete

1.4

SYSTEM DESCRIPTION

A. Grasspave2 Porous flexible parking surface is the basis of design. Provide vehicular and pedestrian load support for grass areas, while protecting grass roots from harmful effects of traffic.

B. Major Components of the Complete System

1. Porous flexible parking surface units assembled in rolls.

2. Engineered sand and gravel base course.

3. Porous flexible parking surface manufacturer’s soil amendment and fertilizer.

4. Sand fill or USGA greens mix.

5. Selected grass from seed or hydroseeding/hydro-mulching.

6. Selected topsoil (only for seeded installation).

7. Mulch (needed only for seeded or hydroseeded installations).

C. The Porous flexible parking surface grass paving units, sand, and base course work together to support imposed loading.

D. The Porous flexible parking surface grass paving units, soil amendment and fertilizer, and sand fill contribute to vegetation support.

1.5 SUBMITTALS

A. Submit a variety of shade tolerant grass species, from which Contracting Officer will select and approve.

B. Shop Drawings: Submit design detail showing proper cross-section.

C. Samples: Submit manufacturer's sample of Porous flexible parking surface 10” x 10” section of Porous flexible parking surface material, and manufacturer’s soil amendment and fertilizer.

D. Installation Instructions: Manufacturer’s printed installation instructions. Include methods for maintaining installed products.

E. Certificates:

1. Manufacturer signed certificate stating the product is made in the USA.

2. Submit Material Certificates for base course and sand (or USGA mix) fill materials

3. Product certificates signed by the manufacturer certifying material compliance of polyethylene used to make Porous flexible parking surface units.

4. ISO Certificate certifying manufacturer’s quality management system is currently registered to ISO 9001:2008 quality standards.

F. Substitutions: No material will be considered as an equivalent to the Grasspave2 unit specified herein unless it meets all areas of this specification without exception. Manufacturers seeking to supply what they represent as equivalent material must submit records, data, independent test results, samples, certifications, and documentation deemed necessary by the Contracting Officer to prove equivalency.

G. Manufacturer’s Material Certification: Product manufacturers shall provide certification of compliance with all applicable testing procedures and related specifications upon written request. Request for certification shall be submitted by the purchasing agency no later than the date of order placement.

H. Product manufacturers shall also have a minimum of 10 years’ experience producing products for Porous flexible parking surfaces.

I. Manufacturer Quality Certification: ISO Certification certifying manufacturer’s quality management system for its Porous flexible parking surface system is currently registered to ISO 9001:2008 quality standards.

Any alternate materials submitted shall provide a certification that their Porous flexible parking surface manufacturing process is part of an ISO program and a certification will be required specifically stating that their testing facility is certified and in accordance with ISO.

1.6 DELIVERY, STORAGE, AND HANDLING

A. Store products in manufacturer’s unopened packaging until ready for installation.

B. Protect Porous flexible parking surface units/rolls from damage during delivery and store rolls upright, under tarp, to protect from sunlight, when time for delivery to installation exceeds one week.

C. Store grass seed and manufacturer’s soil amendment and fertilizer in a dark and dry location D. Handling: Protect materials during handling and installation to prevent damage

1.7 MAINTENANCE SERVICE

A. Installer responsible for maintenance of grass plants – water/irrigation, fertilizing, mowing – for one growing season. DO NOT AERATE. Follow manufacturer’s Porous flexible parking surface Maintenance requirements.

B. System to be maintained by Contractor until grass is firmly established and accepted by Contracting Officer.

1.8 Project Conditions

A. Maintain environmental conditions within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.

B. Do not begin installation of porous pavements until all hard surface paving adjacent to porous pavement areas, including concrete walks and asphalt paving, is completed.

C. Install turf when ambient air temperatures is at least 55 degrees F (13 degrees C).

D. In cold weather, do not use frozen materials or materials mixed or coated with ice or frost, and do not build on frozen base or wet, saturated, or muddy subgrade.

E. Protect partially completed paving against damage from other construction traffic when work is in progress.

F. Adequately water sod or grass seed to assure germination of seed and growth of root system.

G. Grass coverage on the sand-filled Porous flexible parking surface rings must be completed within one week: See Part 3 Execution.

H. DO NOT DRIVE, PARK ON, or use Porous flexible parking surface system for two or three mowing cycles until grass root system has matured (about 3 to 4 weeks for sod or 6 to 8 weeks for seeded areas). Any barricades constructed must still be accessible by emergency and fire equipment during and after installation.

1.9 LIMITED WARRANTY

A. Contractor warrants that all products furnished will be free from defects in material and/or workmanship.

B. This warranty shall be extended for a period of five (5) years following the date of shipment.

C. Defective materials shall be refurnished under this warranty, at no charge, excluding re-installation costs.

PART 2 PRODUCTS

2.1 MANUFACTURERS

A. Acceptable Manufacturer: Invisible Structures, Inc., which is located at: 3510 Himalaya Rd. Suite 200 ;

Aurora, CO 80011; Tel: 303-233-8383; Web: www.invisiblestructures.com.

B. Substitutions: Must be approved by the Contracting Officer.

2.2 POROUS FLEXIBLE PARKING SURFACE (GrassPave2 is the basis of design) A. Composition:

1. Manufactured in the USA.

2. High density polyethylene (HDPE): 100 percent recycled materials.

3. Color: black

4. Color Uniformity: Uniform color throughout all units rolls.

5. Carbon Black for ultraviolet light stabilization.

6. Grass seed and manufacturer’s soil amendment and fertilizer.

B. Performance Properties:

1. Maximum Loading Capability: 15,940 psi (2.29 million psf, 109,906 kPa) when filled with sand.

2. Wheelchair Access testing for ADA Compliance: Passing ASTM F 1951-08.

3. Wheelchair Access testing for ADA Compliance: Passing Rotational Penetrometer testing.

4. Tensile strength, pull-apart testing: 458 lbf/in from ASTM D638 Modified.

5. System Permeability (Grasspave2, sand, base course): 2.63 to 38.55 inches of water per hour.

6. Effective Imperviousness (E.I.): 10%.

C. Dimensions (individual units are assembled and distributed into rolls):

1. Roll area: From 108 sq ft (10 sq m) to 538 sq ft (50 sq m), in 108 sq ft (10 sq m) increments.

2. Roll Widths: From 3.3 ft (1 m) to 8.2 ft (2.5 m), in 1.6 ft (0.5 m) increments.

3. Roll Lengths: From 32.8 ft (10m) to 65.6 ft (20 m), in 3.3 ft (1 m) increments.

4. Roll Weights: From 41 lbs. (19kg) to 205 lbs. (93kg), in 41 lbs. (19 kg) increments.

5. Unit Nominal Width by Length: 20 inches by 20 inches (0.5 m by 0.5 m) or 40 inches by 40 inches

(1 m by 1 m).

6. Nominal Depth: 1 inch (2.5 cm) – for rolls and individual units.

7. Unit Weight: 18 oz (510 g) or 5 lbs. (2.27 kg).

8. Volume Solid: 8 percent.

2.3 SYSTEM MATERIALS

A. Base Course: Sandy gravel material from local sources commonly used for road base construction

(recycled materials such as crushed concrete or crushed asphalt are NOT acceptable).

1. Conforming to the following sieve analysis and requirements:

a. 100 percent passing sieve size 1 inch (25 mm).

b. 80-100 percent passing sieve size 3/4 inch (19 mm).

c. 60-80 percent passing sieve size 3/8 inch (9 mm).

d. 40-60 percent passing sieve size #4.

e. 25-40 percent passing sieve size #10.

f. 5-25 percent passing sieve size #40.

g. 0-5 percent passing sieve size #200.

2. Provide a base course material nearly neutral in pH (range from 6.5 to 7.2) to provide adequate http://www.invisiblestructures.com/

Notes: Use grass species resistant to wear by traffic generally a Zoysia, Fescue, or Bermuda types in southern climates. Check with local sod and seed suppliers for preferred mixtures. Parking applications require greatest wear-resistant species possible, generally available only by seed or hydroseeding/hydro-mulching. Submit a variety of shade tolerant grass species, from which Contracting Officer will select and approve.

root zone development for turf.

3. Material may be either "pit run" or "crusher run." Avoid using clay- b a s e d crusher run/pit run.

Crusher run material will generally require coarse, well-draining sand conforming to AASHTO M6 to be added to mixture (20 to 30 percent by volume) to ensure long-term porosity.

4. Alternative materials such as crushed shell, limerock, or crushed lava may be used for base course use, provided they are mixed with sharp sand (20 to 30 percent) to ensure long-term porosity and are brought to proper compaction. Without added sand, crushed shell and lime rock set up like concrete and become impervious.

5. Alternative size and/or composition of base course materials should be submitted to Invisible Structures, Inc. (Manufacturer) for approval.

B. Sand Fill for Rings and Spaces Between Rings: Clean sharp sand (washed concrete sand). Choose one of the following:

1. Coarse, well-draining sand, such as washed concrete sand conforming to AASHTO M6 or ASTM C-33.

2. United States Golf Association (USGA) greens, section - sand mix “The Root Zone Mixture.”

C. Turf Conditioner:

1. Manufacturer’s soil amendment and fertilizer.

2. NO SUBSTITUTIONS.

D. Grass

1. Seed: Use seed materials, of the preferred species for local environmental and projected traffic conditions, from certified sources. Seed shall be provided in containers clearly labeled to show seed name, lot number, net weight, % weed seed content, and guaranteed % of purity and germination. Pure Live Seed types and amount shall be as shown on plans.

a. Mulch – needed only for hydroseeding: Wood or paper cellulose commercial mulch materials compatible with hydroseeding operations. Mulch depth according to mulch manufacturers’ recommendation. DO NOT use mulch of straw, pine needles, etc., because of their low moisture holding capacity.

b. Topsoil – needed only for seeding, recommended for hydroseeding: Obtain specified topsoil for a light “dusting” (no more than ½” or 13mm) above rings filled with sand for seeding germination.

PART 3 EXECUTION

2. 1 INSPECTION

A. Examine subgrade and base course installed conditions. Do not start porous paving installation until unsatisfactory conditions are corrected. Check for improperly compacted trenches, debris, and improper gradients.

B. Start of installation constitutes acceptance of existing conditions and responsibility for satisfactory performance. If existing conditions are found unsatisfactory, contact Contracting Officer or designated representative for resolution.

3.2 PREPARATION

A. Subgrade Preparation:

1. Verify subgrade in accordance with porous paving system manufacturer's instructions.

Proper subgrade preparation will enable the Porous flexible parking surface rolls/units to connect properly and remain level and stationary after installation.

2. Excavate area allowing for unit thickness, the engineered base depth (where required), and 0.5 inch (1.25 cm) for depth of sod root zone or topsoil germination area (when applicable).

3. Provide adequate drainage from excavated area if area has potential to collect water, when working with in-place soils that have poor permeability.

4. Ensure in-place soil is relatively dry and free from standing water.

5. Uniformly grade base.

6. Level and clear base of large objects, such as rocks and pieces of wood.

B. Base Preparation:

1. Verify engineered base (if required) is installed in accordance with porous paving system manufacturer’s instructions.

2. Place engineered base in lifts not to exceed 6 inches (150 mm), compacting each lift separately to 95 percent Modified Proctor.

3. Leave 1 inch (2.5 cm) of depth below final grade for porous paver unit and sand fill and 0.5 inch (1.25 cm) for depth of sod root zone or topsoil germination area (when applicable).

3.3 SOIL AMENDMENT AND FERTILIZER INSTALLATION

A. Spread manufacturer’s soil amendment and fertilizer mix provided (spreader rate = 4.53 kg per 100 m2 (10 lbs. per 1076 ft2) evenly over the surface of the base course with a hand-held, or wheeled, rotary spreader.

B. The manufacturer’s soil amendment and fertilizer mix should be placed immediately before installing the Porous flexible parking surface units/rolls.

3.4 POROUS FLEXIBLE PARKING SURFACE INSTALLATION

A. Install the Porous flexible parking surface units by placing units with rings facing up, and using snap-fit connectors, pegs and holes, provided to maintain proper spacing and interlock the units. Units can be easily shaped with pruning shears or knife. Units placed on curves, slopes, and high traffic areas shall be anchored to the base course, using 40d common nails with fender washer, as required to secure units in place. Tops of rings shall be between 6 mm to 13 mm (0.25" to 0.5") below the surface of adjacent hard-surface pavements.

B. Install sand in rings as they are laid in sections by "back-dumping" directly from a dump truck, or from buckets mounted on tractors, which then exit the site by driving over rings already filled with sand. The sand is then spread laterally from the pile using flat bottomed shovels and/or wide "asphalt rakes" to fill the rings. A stiff bristled broom should be used for final "finishing" of the sand. The sand must be "compacted" by using water from hose, irrigation heads, or rainfall, with the finish grade no less than the top of rings and no more than 6 mm (0.25") above top of rings.

3.5 INSTALLATION OF GRASS

A. Grass coverage on the sand-filled rings must be completed within one week. Sand must be re-installed and leveled, and Porous flexible parking surface checked for integrity if rings become exposed due to wind, rain, traffic, or other factors.

1. Preferred method: Hydroseeding/hydro-mulching - A combination of water, seed and fertilizer are homogeneously mixed in a purpose-built, truck-mounted tank. The seed mixture is sprayed onto the site at rates shown on plans and per hydroseeding manufacturer's recommendations. Coverage must be uniform and complete. Following germination of the seed, areas lacking germination larger than 20 cm x 20 cm (8" x 8") must be reseeded immediately. Seeded areas must be fertilized and kept moist during development of the turf plants. ). DO NOT DRIVE ON SYSTEM:

Hydroseeded/hydro-mulch areas must be protected from any traffic, other than emergency vehicles, for a period of 6 to 8 weeks, or until the root system has penetrated and established well below the Porous flexible parking surface units.

B. Adequately water sod or grass seed to assure germination of seed and growth of root system.

3.6 PROTECTION

A. Seeded areas must be protected from any traffic, other than emergency vehicles, for a period of 4 to 8 weeks, or until the grass is mature to handle traffic.

B. Sodded areas must be protected from any traffic, other than emergency vehicles, for a period of 3 to 4 weeks, or until the root system has penetrated below the Porous flexible parking surface units.

3.7 FIELD QUALITY CONTROL

A. Remove and replace segments of Porous flexible parking surface units where three or more adjacent rings are broken or damaged, reinstalling as specified, so no evidence of replacement is apparent.

B. Perform cleaning during the installation of work and upon completion of the work. Remove all excess materials, debris, and equipment from site. Repair any damage to adjacent materials and surfaces resulting from installation of this work.

3.8 MAINTENANCE

A. Maintain grass in accordance with manufacturer’s instructions and as specified by manufacturer.

B. Lawn Care: Normal turf care procedures should be followed, including de-thatching.

C. DO NOT AERATE. Aerator will damage the Porous flexible parking surface units. Aeration in not necessary in a sand root zone.

END OF SECTION