613.01 Description. This item shall consist of the construction
of reinforced concrete wingwalls and aprons and the attachment of a shop fabricated steel grate according to these spec ifications and in conformity with the type, locations, design, dimens ions, lines, and grades shown on the plans, or as directed.
613.02 Materials. (a) The concrete shall comply with
Section 802 for Class S concrete or Section 501 for paving concrete. The maximum allowable slump shall be 4" (100 mm). The maximum water/cement ratio shall not be exceeded. The Department will perform all acceptance sampling and testing at the frequencies shown for Contractor acceptance samplin g and testing in Subsection 802.06.
b.Reinforcing steel shall comply with Section 804.
c.Structural steel shall comply with Section 807.
d.Steel pipe for grates and bolts shall comply with S ection 807. Steel pipe for grates shall be "Standard Weight" pi pe complying with ASTM A 53 National Standard Pipe. Bolts, nuts, and washers shall comply with ASTM A 3 07, Grade A or AASHTO M 314, Grade 36, and shall be gal vanized according to AASHTO M 232 or ASTM B695, Class 40 or 50. After galvanizing, the nuts shall be free running o n the bolts.
613.03 Construction Requirements. Except as otherwise
provided, the methods employed in performing the wo rk shall comply with the applicable requirements of the foll owing: 451 (a) Concrete shall be placed, finished, and cured accor ding to Section 802. Concrete shall not be placed until th e Engineer has inspected the forms and the placement of reinforcin g steel or frames.
b.Reinforcing steel shall be placed according to Sect ion 804.
c.Structural steel shall be placed according to Secti on 807.
d.Bolts shall be installed according to Section 807. Welded steel grates shall be welded with 1/4" (6 mm ) fillet welds according to Subsection 807.26. Steel grates and angles shall be hot-dip galvanized according to AASHTO M 111 after fabrication and punching. Field galvanizing shall be allowed as directed by the Engineer only t o repair small areas damaged during installation.
613.04 Method of Measurement. Steel Grate Assemblies will
be measured by the unit of the size and type design ated on the plans. Each unit will be a complete grate assembly for one end of a pipe culvert.
613.05 Basis of Payment. Work completed and accepted and
measured as provided above will be paid for at the contract unit price bid per each for Steel Grate Assembly of the Type designated, which price shall be full compensation for furnishi ng materials; for excavation, forming, mixing, placing, curing, and f inishing; for backfill; for furnishing and placing steel grate pa nels; and for all labor, equipment, tools, and incidentals necessary to complete the work. Payment will be made under: Pay Item Pay Unit __" (__mm) Steel Grate Assembly (Type___) Each
Source: , Edition.