HomeMy WebLinkAbout02920.pdf BICKFORD OF CARMEL, IN 12/12/2012
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SECTION 02920 – TURF & GRASSES
PART 1 – GENERAL
1.1 SUMMARY
A. Section Includes:
1. Seeding: See Construction Documents for limits of seeding.
2. Sodding: See Construction Documents for limits of sodding.
1.2 DEFINITIONS
A. Finish Grade: Elevation of finished surface of planting soil.
B. Manufactured Soil: Soil produced off-site by homogeneously blending mineral soils or sand
with stabilized organic soil amendments to produce topsoil or planting soil.
C. Planting Soil: Native or imported topsoil, manufactured topsoil, or surface soil modified to
become topsoil; mixed with soil amendments.
D. Subgrade: Surface or elevation of subsoil remaining after completing excavation, or top surface
of a fill or backfill immediately beneath planting soil.
E. Subsoil: All soil beneath the topsoil layer of the soil profile, and typified by the lack of organic
matter and soil organisms.
1.3 SUBMITTALS
A. Product Data: For each type of product indicated.
B. Certification of grass seed.
1. Certification of each seed mixture for turfgrass sod.
C. Product certificates.
D. Planting Schedule: Indicating anticipated planting dates for each type of planting.
1.4 QUALITY ASSURANCE
A. Installer's Field Supervision: Require Installer to maintain an experienced full-time supervisor
on Project site when planting is in progress.
B. Topsoil Analysis: Furnish soil analysis by a qualified soil-testing laboratory.
1. Report suitability of topsoil for lawn growth. State-recommended quantities of nitrogen,
phosphorus, and potash nutrients and soil amendments to be added to produce
satisfactory topsoil.
1.5 DELIVERY, STORAGE, AND HANDLING
A. Sod: Harvest, deliver, store, and handle sod according to requirements in TPI's "Specifications
for Turfgrass Sod Materials" and "Specifications for Turfgrass Sod Transplanting and
Installation" in its "Guideline Specifications to Turfgrass Sodding." Deliver sod in time for
planting within 24 hours of harvesting. Protect sod from breakage and drying.
1.6 MAINTENANCE SERVICE
A. Initial Lawn Maintenance Service: Provide full maintenance by skilled employees of landscape
Installer. Maintain as required in Part 3. Begin maintenance immediately after each area is
planted and continue until acceptable lawn is established.
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PART 2 – PRODUCTS
2.1 SEED
A. Grass Seed: Fresh, clean, dry, new-crop seed complying with AOSA's "Journal of Seed
Technology; Rules for Testing Seeds" for purity and germination tolerances.
B. Seed Species: State-certified seed of grass species, as follows with not less than 95 percent
germination, not less than 85 percent pure live seed, and not more than 0.5 percent weed seed:
1. 95% - Turf-Type Fescue & 10% - Hybrid Bluegrass
2. Or approved equal.
2.2 TURFGRASS SOD
A. Turfgrass Sod: Complying with TPI's "Specifications for Turfgrass Sod Materials" in its
"Guideline Specifications to Turfgrass Sodding." Furnish viable sod of uniform density, color,
and texture, strongly rooted, and capable of vigorous growth and development when planted.
B. Turfgrass Species: State-certified seed of grass species, as follows with not less than 95 percent
germination, not less than 85 percent pure live seed, and not more than 0.5 percent weed seed:
1. 95% - Turf-Type Fescue & 10% - Hybrid Bluegrass
2. Or approved equal.
2.3 TOPSOIL
A. Topsoil: See plans and details for specifications.
2.4 INORGANIC SOIL AMENDMENTS
A. Lime: ASTM C 602, agricultural limestone containing a minimum of 80 percent calcium
carbonate equivalent and as follows:
1. Class: T, with a minimum of 99 percent passing through No. 8 sieve and a minimum of
75 percent passing through No. 60 sieve.
B. Sulfur: Granular, biodegradable, containing a minimum of 90 percent sulfur, with a minimum of
99 percent passing through No. 6 sieve and a maximum of 10 percent passing through No. 40
sieve.
C. Iron Sulfate: Granulated ferrous sulfate containing a minimum of 20 percent iron and 10
percent sulfur.
D. Aluminum Sulfate: Commercial grade, unadulterated.
E. Agricultural Gypsum: Finely ground, containing a minimum of 90 percent calcium sulfate.
F. Sand: Clean, washed, natural or manufactured, free of toxic materials.
2.5 ORGANIC SOIL AMENDMENTS
A. Compost: Well-composted, stable, and weed-free organic matter, pH range of 5.5 to 8;
moisture content 35 to 55 percent by weight; 100 percent passing through 1-inch sieve; soluble
salt content of 5 to 10 decisiemens/m.
B. Manure: Well-rotted, unleached, stable or cattle manure containing not more than 25 percent
by volume of straw, sawdust, or other bedding materials; free of toxic substances, stones,
sticks, soil, weed seed, and material harmful to plant growth.
C. Wood Derivatives: Decomposed, nitrogen-treated sawdust, ground bark, or wood waste; of
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uniform texture, free of chips, stones, sticks, soil, or toxic materials.
2.6 FERTILIZER
A. Bonemeal: Commercial, raw or steamed, finely ground; a minimum of 4 percent nitrogen and
10 percent phosphoric acid.
B. Superphosphate: Commercial, phosphate mixture, soluble; a minimum of 20 percent available
phosphoric acid.
C. Commercial Fertilizer: Commercial-grade complete fertilizer of neutral character, consisting of
fast- and slow-release nitrogen, 50 percent derived from natural organic sources of urea
formaldehyde, phosphorous, and potassium in the following composition:
1. Composition: 1 lb/1000 sq. ft. of actual nitrogen, 4 percent phosphorus, and 2 percent
potassium, by weight.
D. Slow-Release Fertilizer: Granular or pelleted fertilizer consisting of 50 percent water-insoluble
nitrogen, phosphorus, and potassium in the following composition:
1. Composition: 20 percent nitrogen, 10 percent phosphorous, and 10 percent potassium,
by weight.
2.7 MULCHES
A. Straw Mulch: Provide air-dry, clean, mildew- and seed-free, salt hay or threshed straw of
wheat, rye, oats, or barley.
B. Compost Mulch: Well composted, stable, and weed-free organic matter, pH range of 5.5 to 8;
moisture content 35 to 55 percent by weight; 100 percent passing through 1-inch sieve; soluble
salt content of 2 to 5 decisiemens/m.
C.
2.8 PLANTING SOIL MIX
A. Planting Soil Mix: Topsoil mixed with the soil amendments and fertilizers in the quantities per
the results of the topsoil analysis.
PART 3 – EXECUTION
3.1 LAWN PREPARATION
A. Newly Graded Subgrades: Loosen subgrade to a minimum depth of 4 inches. Remove stones
larger than 1 inch in any dimension and sticks, roots, rubbish, and other extraneous matter and
legally dispose of them off Owner's property.
1. Thoroughly blend planting soil mix off-site before spreading or spread topsoil, apply soil
amendments and fertilizer on surface, and thoroughly blend planting soil mix.
2. Spread planting soil mix to a depth of 12 inches but not less than required to meet finish
grades after light rolling and natural settlement. Do not spread if planting soil or
subgrade is frozen, muddy, or excessively wet.
a. Reduce elevation of planting soil to allow for soil thickness of sod.
B. Unchanged Subgrades: If lawns are to be planted in areas unaltered or undisturbed by
excavating, grading, or surface-soil stripping operations, prepare surface soil as follows:
1. Remove existing grass, vegetation, and turf. Do not mix into surface soil.
2. Loosen surface soil to a depth of at least 8 inches. Apply soil amendments and fertilizers
according to planting soil mix proportions and mix thoroughly into top 6 inches of soil. Till
soil to a homogeneous mixture of fine texture.
3. Remove stones larger than 1 inch in any dimension and sticks, roots, trash, and other
extraneous matter.
4. Legally dispose of waste material, including grass, vegetation, and turf, off Owner's
property.
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C. Finish Grading: Grade planting areas to a smooth, uniform surface plane with loose, uniformly
fine texture. Grade to within plus or minus 1/2 inch of finish elevation. Roll and rake, remove
ridges, and fill depressions to meet finish grades. Limit finish grading to areas that can be
planted in the immediate future.
D. Moisten prepared lawn areas before planting if soil is dry. Water thoroughly and allow surface
to dry before planting. Do not create muddy soil.
E. Before planting, restore areas if eroded or otherwise disturbed after finish grading.
3.2 SEEDING
A. Do not broadcast or drop seed when wind velocity exceeds 5 mph. Evenly distribute seed by
sowing equal quantities in two directions at right angles to each other.
B. Sow seed at a total rate of 5 to 8 lb/1000 sq. ft.
C. Rake seed lightly into top 1/8 inch of soil, roll lightly, and water with fine spray.
D. Protect seeded areas by spreading straw mulch. Spread uniformly at a minimum rate of 2
tons/acre to form a continuous blanket 1-1/2 inches in loose depth over seeded areas. Spread
by hand, blower, or other suitable equipment.
1. Anchor straw mulch by crimping into soil with suitable mechanical equipment.
2. For slopes exceeding 3:1 stabilize as noted on plans.
3.3 SODDING
A. Lay sod within 24 hours of harvesting. Do not lay sod if dormant or if ground is frozen or
muddy.
B. Lay sod to form a solid mass with tightly fitted joints. Butt ends and sides of sod; do not stretch
or overlap. Stagger sod strips or pads to offset joints in adjacent courses. Avoid damage to
subgrade or sod during installation. Tamp and roll lightly to ensure contact with subgrade,
eliminate air pockets, and form a smooth surface. Work sifted soil or fine sand into minor
cracks between pieces of sod; remove excess to avoid smothering sod and adjacent grass.
1. Lay sod across angle of slopes exceeding 1:3.
2. Anchor sod on slopes exceeding 1:3 with or steel staples spaced as recommended by
sod manufacturer but not less than 2 anchors per sod strip to prevent slippage.
B. Saturate sod with fine water spray within two hours of planting. During first week after planting,
water daily or more frequently as necessary to maintain moist soil to a minimum depth of 1-1/2
inches below sod.
3.4 LAWN MAINTENANCE
A. Maintain and establish lawn by watering, fertilizing, weeding, mowing, trimming, replanting, and
other operations until Substantial Completion. Roll, regrade, and replant bare or eroded areas
and remulch to produce a uniformly smooth lawn. Provide materials and installation the same
as those used in the original installation.
C. Mow lawn as soon as top growth is tall enough to cut. Repeat mowing to maintain specified
height without cutting more than 1/3 of grass height. Remove no more than 1/3 of grass-leaf
growth in initial or subsequent mowings.
3.5 SATISFACTORY LAWNS
A. Satisfactory Seeded Lawn: At end of maintenance period, a healthy, uniform, close stand of
grass has been established, free of weeds and surface irregularities, with coverage exceeding
90 percent over any 10 sq. ft. and bare spots not exceeding 5 by 5 inches.
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B. Satisfactory Sodded Lawn: At end of maintenance period, a healthy, well-rooted, even-colored,
viable lawn has been established, free of weeds, open joints, bare areas, and surface
irregularities.
C. Use specified materials to reestablish lawns that do not comply with requirements and continue
maintenance until lawns are satisfactory.
END OF SECTION