Cable Rope: all cable rope shall be galvanized ¾ inch diameter, 3x7 wire rope construction meeting AASHTO m30 type I class a coating, except the breaking strength minimum shall be 39,000 pounds. The wire rope shall be prestretched during manufacturing to exhibit a minimum modulus of elasticity of 11,805,090 pounds/inch2 after pre-stretching. Posts: Posts shall be the socketed version and shall be fabricated from materials meeting astm a-36 or greater steel and galvanized after fabrication to a-123. any required welding shall be performed by a certified welder in accordance with wAWS d1.1. Posts shall be domestic hotrolled mild steel, or cold-formed from hot-rolled mild steel. a fitting gasket, profiled to fit tightly around each post, shall be provided to prevent debris from entering the socket. Fittings: only swaged fittings shall be provided. field installed, galvanized-steel fittings (i.e. turnbuckles and splices) shall be one-inch diameter. factory applied or stainless steel fittings shall be per the manufacturer’s specifications. Fully fitted ropes shall develop a minimum breaking load (mbl) of 36800 pounds. threaded terminals shall be right hand or left handed m24 x 3 pitch to ansi b 1.13m. The body of the threaded terminal shall provide a minimum of 6 inches wire rope engagement depth. Threaded terminals shall be either stainless steel or galvanized, after processing, to ASTM A-153. Turnbuckles: turnbuckles (i.e. rigging screws) shall be threaded to accept the fitting described above. turnbuckles may be either the open or closed body type (with two inspection holes to determine threaded rope terminal penetration). The turnbuckles shall allow for a minimum of 6 inches of penetration from each end. turnbuckles shall develop minimal tensile loads without yielding to 36,800 pounds and shall be galvanized after threading to ASTM A-153 or stainless steel. Mechanical anchor fittings: fittings shall be provided at the anchor termination of each cable rope and shall be of the same type as used in the connection to the turnbuckles. The fittings shall develop minimal tensile loads of the entire wire rope of 36,800 pounds without yielding, shall be capable of release and reuse, and shall be galvanized after threading to ASTM A-153. End Terminals: end terminals shall be NCHRP Report 350 compliant, meeting test level 3 (tl-3) requirements, and having an FHWA letter of acceptance. each of the four cable ropes of the system shall have separate anchors connections to the terminal end section. end anchors shall be fabricated from materials meeting ASTM A-36 and galvanized after fabrication to a-123. All welding shall be performed by a certified welder in accordance with aws d1.1.
