2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 900 MATERIALS SECTION 919 — GEOTEXTILES
919.01 Geotextile Requirements
Geotextiles used on Administration projects shall participate in the National Transportation Product Evaluation Program (NTPEP) and conform to the Contract Documents and MSMT 732 . Geotextiles shall be manufactured from fibers consisting of long chain synthetic polymers, composed of a minimum 95 percent by weight of polyolefins or polyesters, and formed into a stable network so the filaments or yarns retain their dimensional stability relative to each other, including selvages. Geotextiles used on Administration projects shall conform to the following: GRAB STRENGTH lb PUNCTURE STRENGTH lb PERMITTIVITY sec-1 APPARENT OPENING SIZE, MAX mm TRAPEZOID TEAR STRENGTH *** lb MARYLAND APPLICATION CLASS TYPE OF GEOTEXTILE D4632 D6241 D4491 D4751 D4533 NONWOVEN 160 310 0.50 0.43 55TYPE I WOVEN, MONOFILAMENT 250 495 0.50 0.43 90 NONWOVEN 160 310 0.20 0.25 55SD TYPE II WOVEN, MONOFILAMENT 250 495 0.20 0.25 90 NONWOVEN 200 430 0.70 0.43 80TYPE I WOVEN, MONOFILAMENT 250 620 0.70 0.43 90 NONWOVEN 200 310 0.20 0.25 55TYPE II WOVEN, MONOFILAMENT 250 495 0.20 0.25 90 NONWOVEN 200 220 0.10 0.22 40 PE TYPE III WOVEN, MONOFILAMENT 250 370 0.10 0.22 70 NONWOVEN 160 310 0.20 0.30 80SE WOVEN 250 495 0.20 0.30 90 ST WOVEN 300* 600 0.05 0.15** 110 F WOVEN 200 450 0.05 0.60 75 NONWOVEN 200 450 1.1 0.21 80 E WOVEN, MONOFILAMENT 370 900 0.28 0.21 100 Note 1: All property values in the above table are based on minimum average roll values in the weakest principal direction except for apparent opening size. Note 2: The ultraviolet stability shall be 50 percent after 500 hrs of exposure for all classes, except Class F, which shall be 70 percent (D4355). *15 percent elongation for silt fence and monofilament woven geotextile in Machine Direction 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS **This is a MINIMUM apparent opening size, not a maximum. ***Machine Direction Contact the Office of Materials Technology’s Soils and Aggregate Technology Division for approval of geotextiles used for reinforcement applications.
919.02 Seam and Overlap
D4884. Geotextiles joined by sewing shall conform to the following:
a.Either “J” or “Butterfly” type seams joined with a lock stitch.
b.Tensile strength requirements when tested across the seam. (c) Thread used for seaming shall be of equal or greater durability than the geotextile itself.
919.03 Securing Pins Or Staples
Minimum 10 in. length and designed to securely hold the geotextile in place during construction. 920 — LANDSCAPING MATERIALS 2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 900 MATERIALS SECTION 920 — LANDSCAPING MATERIALS
920.01 Soils
Topsoil, Subsoil, and Bioretention Soil Mix shall conform to requirements of this section. Soils shall be sampled, tested and approved by the Soils and Aggregates Technology Division of the Office of Materials Technology, or by other approved tests or laboratories. Soils shall be amended as specified by the Nutrient Management Plan (NMP).
920.01.01 Existing Topsoil and Salvaged Topsoil.
a.Existing Topsoil. Existing topsoil is the surface material of existing landscaped areas on SHA property that will be used for seeding or other landscape construction without excavation or significant grading.
b.Salvaged Topsoil. Salvaged topsoil is the surface material of existing landscaped areas on SHA property that will be used for seeding or other landscape construction after being excavated, stockpiled, and placed in designated areas.
c.Composition. Existing topsoil and salvaged topsoil shall conform to the following: COMPOSITION - EXISTING TOPSOIL & SALVAGED TOPSOIL TEST PROPERTY TEST METHOD TEST VALUE AND AMENDMENT Prohibited Weeds — Free of live stems or roots of Shattercane, Johnsongrass, Canada Thistle, Bull Thistle, Plumeless Thistle, Musk Thistle, Common Reed and Japanese Knotweed when inspected before transportation. Debris — 1.0% or less by weight of cement, concrete, asphalt, crushed gravel or construction debris when inspected. Sieve Size Passing by Weight Minimum % 2 in. 100 No. 4 90 Grading Analysis R-58 No. 10 80 Particle % Retained by Weight Size mm Minimum Maximum Sand 2.0 – 0.050 15 77 Silt 0.050 – 0.002 80 Textural Analysis T-88 Clay less than 0.002 Combined Silt and Clay 23 30
Source: Maryland Standard Specifications for Construction and Materials, 2025 Edition. Pages 1017–1018 of 1,113.