SECTION 7 19 SCOPE
719.01.01 Materials Covered. This specification covers the types and quality of riprap and riprap bedding.
REQUIREMENTS
719.02.01 General. Material for riprap and riprap bedding shall be hard, durable, angular in shape; resistant to
weathering and water action; free from overburden, spoil, shale, and organic material; and shall meet the gradation requirements specified. Control of gradation will be by visual inspection. If directed, provide 2 samples of material of a least 5 metric ton (5.5 ton) each, meeting the gradation specified. Provide one sample at the construction site, which may become part of the finished work . Provide the other sample at the quarry. These samples will be used as a frequent reference for judging the gradation of the material supplied. Resolve any difference of opinion between yourself and the Engineer by dumping and checking the gradation of 2 random truck loads of material . Provide mechanical equipment, a sorting site, and labor needed to assist in checking the gradation. PHYSICAL PROPERTIES AND TESTS
719.03.01 Stone for Riprap . This stone shall conform to the following requirements:
RIPRAP GRADATIONS mm (in.) CLASS DESIGNATIONS Percent Passing by Mass 150 300 400 550 700 900 100 ..................... 250 (10) ............. 500 (20) ............ 750 (30) ............ 1000 (40) ........... 1200 (48) .......... 1500 (60) 70-85 .................... 225 (9) .............. 450 (18) ............ 675 (27) ............. 900 (36) ............ 1125 (45) .......... 1350 (54) 35-50 .................... 150 (6) .............. 300 (12) ............ 450 (18) ............. 600 (24) ............. 750 (30) ............ 900 (36) 5-15 ...................... 50 (2) ................ 125 (5) .............. 175 (7) ............. 300 (12) ............. 450 (18) ............ 600 (24) 0-5 ....................... 25 (1) ................. 50 (2) ................ 75 (3) ............... 150 (6) ............... 200 (8) ............. 300 (12) Source Requirement Tests Test Method Requirements Percentage of Wear, 500 Rev . ................................ ..................... AASHTO T96 ............................................ 45% Max. Specific Gravity ................................ ................................ .................. Nev. T104 .............................................. 2.5 Min. The largest dimension of a single riprap stone shall be no larger than 3 times the smallest dimension. Rounded stone or boulders will not be accepted. Shale and stone with shale seams are not acceptable.
719.03.0 2 Aggregate for Riprap Bedding. This aggregate shall conform to the following requirements:
CLASS 150 RIPRAP BEDDING CLASS 300/400 RIPRAP BEDDING Sieve Size Percent Passing by Mass Sieve Size Percent Passing by Mass 25 mm (1 in.) .............................. 100 150 mm (6 in.) .............................. 100 16 mm (5/8 in.) ............................ 70-85 125 mm (5 in.) ............................. 70-85 9.5 mm (3/8 in.) ............................ 35-50 75 mm (3 in.) .............................. 35-50 6.3 mm (1/4 in.) ............................. 5-15 25 mm (1 in.) ............................... 5-15 4.75 mm (No. 4) ............................. 0-5 12.5 mm (1/2 in.) ............................ 0-5 CLASS 550/700 RIPRAP BEDDING CLASS 900 RIPRAP BEDDING Sieve Size Percent Passing by Mass Sieve Size Percent Passing by Mass 250 mm (10 in.) ............................. 100 500 mm (20 in.) ............................. 100 225 mm (9 in.) ............................. 70-85 450 mm (18 in.) ............................ 70-85 150 mm (6 in.) ............................. 35-50 300 mm (12 in.) ............................ 35-50 50 mm (2 in.) .............................. 5-15 125 mm (5 in.) .............................. 5-15 25 mm (1 in.) ............................... 0-5 50 mm (2 in.) ............................... 0-5 Source Requirement Tests Test Method Requirements Percentage of Wear, 500 Rev. ................................ ..................... AASHTO T96 ............................................ 45% Max. Specific Gravity ................................ ................................ .................. Nev. T104 .............................................. 2.5 Min. SECTION 720 GUARDRAIL MATERIALS SCOPE
720.01.01 Materials Covered. This specification covers the quality and kind of material used in the
construction of guardrail. REQUIREMENTS
720.02.01 Certificates. Furnish 2 certified copies of mill test reports showing the chemical and physical
characteristics from each heat from which metal is used. Rail members, bolts, nuts, and other fittings shall be interchangeable with similar parts regardless of source. PHYSICAL PROPERTIES AND TESTS
720.03.01 Rail Members. The beam -type members, comprised of rail members and end or terminal pieces,
shall conform to AASHTO M180, Type I, Class A, except galvanize after fabrication.
720.03.02 Fittings. All bolts, nuts, washers, and other fittings for beam -type guardrail shall be galvanized steel
meeting AASHTO M180. All bolts, nuts, and washers shall be 16 mm (5/8 in.) size. Bolts shall be button- head style and nuts shall be hexagonal. Bolts and nuts shall be coarse- threaded [11 threads per 25 mm (1 in.)], with nuts tapped oversize not to exceed 0.8 mm (1/32 in.). Outside dimensions of boltheads, nuts, and washers shall have the following minimums: boltheads, 32 mm (1 1/4 in.); nuts, 24 mm (15/16 in.); and washers, 38 mm (1 1/2 in.). Splice bolts shall be 32 mm (1 1/4 in.) in length, and post connection bolts shall be of lengths required to fit the post dimension and extend beyond the tightened nuts thereon within limits of 6 to 13 mm (1/4 to 1/2 in.). Provide washers, 3 mm (1/8 in.) thick, for use under nuts on all post bol ts, and under any nut which has a width of less than 27 mm (1 1/16 in.). Bolts for guardrail to barrier rail and guardrail to bridge rail connections shall be of lengths required to fit the dimension and extend beyond the tightened nuts thereon within lim its of 6 to 13 mm (1/4 to 1/2 in.). Galvanize fittings according to Section 715.
720.03.03 Guardrail Anchor Hardware. Provide cable and fitting for guardrail anchors that conforms to
AASHTO M30, Class C, for Type II cable. Galvanize all fittings according to AASHTO M111.
720.03.04 Metal Guardrail Posts. Metal posts shall be of structural steel conforming to ASTM A36 and
galvanized according to AASHTO M111.
720.03.05 Wood Guardrail Post. Wood posts and blocks shall be rough or surfaced to the dimensions shown
in the plans and shall conform to Section 718.