619.05 Basis of Payment.
Payment for detectable warning surfaces shall include preparation of the u nderlying surface, labor, equipment, tools, and incidentals necessary to complete the work. Payment for curb ramps shall include all excavation, subgrade preparation, grading, making transitions in the curb and gutter, construction of joints, and for all l abor, equipment, tools, and incidentals necessary to complete the work.
b.Payment will be made under Item No .: 618— A Concrete Sidewalk, ____ inch(es) {mm} Thick - per square yard {square meter} 618— B Concrete Driveway, ____ inch(es) {mm} Thick - per square yard {square meter} 618— C Detectable Warning Surface - per square foot {square meter} 618— D Curb Ramp – per square yard {square meter} PIPE CULVERT END TREATMENTS
619.01 Description.
This Section shall cover the work of constructing a pipe culvert end treatment in accordance with these specifications and the plan details, at the locations shown on the plans or directed. Unless specified otherwise on the plans or in the proposal, the Contrac tor may, for the required end treatment, either furnish and install a prefabricated pipe culvert concrete end section or construct a slope paved headwall, all in accordance with plan details and these specifications. Class 1 shall designate those end treat ments which do not require a grate. Class 2 shall designate those end treatments which do require a grate.
619.02 Materials.
All materials furnished for use shall conform to the appropriate requirements of Section 614 ; Division 800, Materials ; the plan det ails; and the following: Concrete end sections shall comply with the requirement shown by plan details and Section 850 for Class 3 pipe except that the three -edge-bearing test will not be required. Concrete end sections with metal sleeves shall comply with the provisions noted above. The metal sleeve shall comply with the appropriate provisions of Articles 850.02 and 850.03. Metal sleeves used in conjunction with coated and/ or paved invert pipe shall be coated using the same coating, with the exception of paved invert, used in the pipe culvert to which the sleeves are attached. In lieu of the bituminous coating, the Contractor may substitute a polymeric coating meeting the requirements specified in Item 850.02(c)2. Safety grates, when required, shall be fabricated in accordance with plan details.
619.03 Construction Requirements.
a.Excavation and Backfill . All excavation involved shall be in accordance with the provisions of the Sections for the type pipe involved and Section 214. Backfilling shall be as specified under Sections 210, 214 and the applicable Pipe Culvert Section.
b.Installation of End Treatments. When prefabricated end sections are used, they shall be installed and securely affixed to the pipe line as shown on the plans or directed, all in conformity with the established lines and grades for the structure. When slope paved headwalls are used, they shall be constructed as shown on the plans.
619.04 Method of Measurement.
The number of end treatments measured for payment will be the actual nu mber of end treatments of the designated size and class, complete in place, on each designated pipe culvert.
619.05 Basis of Payment.
a.Unit Price Coverage . The ordered and accepted pipe culvert end treatment of the designated class for each size and appropriate type of pipe to which the end treatment is attached, measured as noted above, will be
620.01 Description.
paid for at the contract unit price bid for the end treatment. Such price shall be full compensation for the furnishing of all materials and the installation and construction thereof, except for the items of Structure Excavation and Foundation Backfill, necessary for the complete construction of the end treatment, and for all labor, tools, equipment, and incidentals necessary to complete the work.
b.Payment will be made under Item No .: 619-A ___ inch {mm} * Pipe End Treatment, Class ____ - per each 619-B ___ inch {mm} Span, ___ inch {mm} Rise * Pipe End Treatment, Class ____ - per each * Specify Roadway or Side Drain. SECTION 620 MINOR STRUCTURE CONC RETE
620.01 Description.
This Section shall cover the work of constructing minor concrete structures such as pipe culvert headwalls, inlets and junction boxes, concrete steps, coping walls, and other miscellaneous items. All of which shall be constructed in accordance with the details shown on the plans and these specifications to the lines and grades established by the plans or directed.
620.02 Materials.
All materials furnished for use shall conform to the requirements o f Division 800, Materials, and the following: Section 501 Structure Concrete Section 502 Reinforcing Steel
620.03 Construction Requirements.
a.General . The concrete mix used for minor structure work shall be Class A concrete unless otherwise provided by plan details, all in accordance with the appropriate provisions of Section 501.
b.Excavation and Backfill . Excavation and backfill shall be in accordance with the provisions of Sections 210 and 214.
c.Forming and Placing of Concrete . Construction, forming, placing, etc. of the structures shall be in accordance with the requirements given in Section 501 .
d.Finishing and Curing . Attention is directed to the requirement given in Section 501 that all surfaces receive a Class 1 surface finish and that all exposed surfaces receive a Class 2 surface finish, unless otherwise specified in the proposal or by plan requirements. In order to permit proper surface finishing, forms may be removed as soon as the concrete has set sufficiently that for m removal will not damage the green concrete, but in no event less than 12 hours after completion of the placing. Immediately after the pouring operations, surfaces not covered by forms shall be covered with one of the curing materials specified in Section 830. Immediately after the removal of the forms, the surface finishing operations noted in S ection 501 shall commence, and the curing operations continued for at least 72 hours after the finishing operation, using one of the curing materials specified in Section 830 and the related curing method required with the material used. Failure to apply the initial surface finish or perform the curing operation as noted herein shall be just cause for rejection of the concrete. Removal and replacement of rejected co ncrete shall be at no additional cost to the Department.
e.Concrete Surface Tolerances. The finished concrete shall be within reasonably close conformity to the lines, grades, and dimensions shown on the plans or directed, and free from objectionable cav ities or projections.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 502–502 of 934.