B
HomeLibrariesCopilotSearchProjectsBookmarks
FeedbackHelp Desk
Libraries
Building Codes
Code LibraryIBC — BuildingIRC — ResidentialIFC — FireIPC — PlumbingIMC — MechanicalIFGC — Fuel GasIECC — EnergyNEC — ElectricalModel Codes
Specifications
CSI SpecificationsDOT SpecsTransit SpecsUSACE
Standards
TransportationRailroadFire SafetyAccessibilityStructural
Tools & References
DiagramsAssembliesProductsCalculatorsChecklistsPermits
PricingLog in
Incidental Construction (600-699)

679SLAB STABILIZATION

PA · 2026 Standard SpecificationsBook pages 733735View official source ↗

Weight Minimum % Max % Weed Seed Seeding Rate lb/1000 yd2 (lb/acre) Purity Germination Formula L Clear Zone Mix 48.0 ( 240) Total Hard Fescue mixture (Festuca longifolia ). A combination of improved certified varieties with no one variety exceeding 50% of the total Hard Fescue component 55 97 85 0.10 26.4 ( 132) Creeping Red Fescue ( Festuca rubra ) (Improved and Certified 35 97 85 0.10 16.8 ( 84) Annual Ryegrass ( Lolium multiflorum ) 10 95 90 0.10 4.8 (24) Formula N Conservation Mix * 8 (40.0) Total Nursery crops Oats ( Avena sativa ) (Spring) 75 97 85 0.10 6 (30) Cereal Rye ( Secale cereale ) (Fall) 75 97 85 0.10 6 (30) Permanent Species Purple Top ( Tridens flavus ) 2.5 80 70 0.20 0.2 (1.0) Little Bluestem ( Schizachyrium scoparium ) 6.25 85 70 0.20 0.5 (2.5) Canada Wildrye ( Elymus canadensis ) 1.25 85 70 0.20 0.1 (0.5) Switchgrass ( Panicum virgatum ) 0.625 80 60 0.20 0.05 (0.25) Indiangrass 0.625 80 60 0.20 0.05 (0.25) Roundseed Panicgrass ( Panicum sphaerocarpum ) 1.25 - - - 0.1 (0.5) Black -eyed Susan ( Rudbeckia hirta ) 4 80 60 0.20 0.32 (1.6) Ox-eye Sunflower ( Heliopsis helianthoides ) 2.5 - - - 0.2 (1.0) White Avens ( Geum canadense ) 0.25 - - - 0.02 (0.1) Common Milkweed ( Asclepias syriaca ) 0.75 - - - 0.06 (0.3) Partridge Pea ( Chamaecrista fasciculata ) 2.5 - - - 0.2 (1.0) Showy Tick -trefoil ( Desmodium canadense ) 2.5 - - - 0.2 (1.0) Formula P Pollinator Conservation Mix * 8 (40.0) Total Nursery crops Oats ( Avena sativa ) (Spring) 75 97 85 0.1 6 (30) Cereal Rye ( Secale cereale ) (Fall) 75 97 85 0.1 6 (30) Permanent Species Little Bluestem ( Schizachyrium scoparium ) 3.75 85 70 0.2 0.3 (1.5) Switchgrass ( Panicum virgatum ) 1.25 80 60 0.2 0.1 (0.5) Black -eyed Susan ( Rudbeckia hirta ) 2.875 80 60 0.2 0.23 (1.15) Ox-eye Sunflower ( Heliopsis helianthoides ) 1.25 - - - 0.1 (0.5) Foxglove Beardtongue ( Penstemon digitalis ) 1.25 - - - 0.1 (0.5) Lanceleaf Coreopsis ( Coreopsis lanceolata ) 1.25 - - - 0.1 (0.5) Partridge Pea ( Chamaecrista fasciculata ) 0.95 - - - 0.076 (0.38) Dense Blazing Star ( Liatris spicata ) 0.25 - - 0.02 (0.1) Purple Coneflower ( Echinacea purpurea ) 0.75 - - - 0.06 (0.3) Wild Bergamot ( Monarda fistulosa ) 1.25 - - - 0.1 (0.5)

Weight Minimum % Max % Weed Seed Seeding Rate lb/1000 yd2 (lb/acre) Purity Germination Butterfly Milkweed ( Asclepias tuberosa ) 0.375 - - - 0.03 (0.15) Common Milkweed ( Asclepias syriaca ) 0.625 - - - 0.05 (0.25) Swamp Milkweed ( Asclepias incarnata ) 0.5 - - - 0.04 (0.2) Wild Senna ( Senna hebecarpa ) 0.5 - - - 0.04 (0.2) Showy Tick -trefoil ( Desmodium canadense ) 0.5 - - - 0.04 (0.2) Purple Top ( Tridens flavus ) 2.5 80 70 0.2 0.2 (1) Golden Alexander ( Zizia aurea )

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 733735 of 1,522.