2025 STANDARD SPECIFICATIONS FOR CONSTRUCTION AND MATERIALS CATEGORY 900 MATERIALS SECTION 918 — TRAFFIC BARRIERS
918.00 Certification
The manufacturer shall furnish certification as specified in TC-1.03.
918.01 Traffic Barrier W-Beam/Thrie-Beam
M 180, Type II or VI for rail elements and end treatments. Coat galvanized rail and end treatment elements designated for fusion bonded polyester powder coating as specified in Section 465. Galvanized rail and end treatments to be fusion bonded powder coated shall be fabricated and have holes punched prior to being hot dipped galvanized.
918.02 Traffic Barrier Posts
A36 for steel and M 111 for galvanized coating. Coat galvanized post elements designated for fusion bonded polyester powder coating as specified in Section 465. Galvanized posts to be fusion bonded powder coated shall be fabricated and have holes punched prior to being hot dipped galvanized.
918.03 Hardware for Traffic Barriers
M 183 for quality of steel and M 232 for galvanized coating.
918.04 Timber Rail and Posts
M 168.
918.05 Wire Rope
Federal Specification RR-W-410, Type I, General Purpose, Class 2, 6 by 19, improved plow steel, fiber core. The individual wire strands shall have a zinc coating of 0.8 oz/ft 2 when tested according to T 65. 919 — GEOTEXTILES 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