1043 existing delineation as necessary, excavation, backfill and compaction, and disposal of surplus or unusable materials. The accepted quantities of reconstruct guardrail with new posts, blockouts, and hardware, measured as provided above, will be paid for at the contract unit price, complete in place, including all new posts, blockouts, and hardware, new guardrail delineation, removal of existing delineation as necessary, excavation, backfill and compaction, and disposal of surplus or unusable materials. The accepted quantities of reconstruct guardrail transitions, guardrail terminals, and end anchors, measured as provided above, will be paid for at the contract unit price, complete in place, including new guardrail delineation, removal of existing delineation as necessary, excavation, backfill and compaction, and disposal of surplus or unusable materials. Payment for reconstructing end anchors will include all costs for providing and installing new foundation tubes. The contractor will be paid in accordance with the provisions of Subsection 109.04 of the specifications for furnishing new posts, blockouts, rail elements or hardware to replace components deemed by the Engineer unsuitable for reuse, or to supplement insufficient existing quantities for reconstructing the various types of guardrail, or for constructing the various types of guardrail from salvage. Reconstruct guardrail does not include stockpiling or relocating guardrail. Guardrail requiring stockpiling or relocating will be compensated under two separate bid items:
906- 1 Description: The work under this section shall consist of furnishing all materials and constructing new cattle guards or reconstructing existing cattle guards at the locations shown on the project plans or designated by the Engineer, in accordance with the details shown on the plans and the requirements of these specifications. 906- 2 Materials: 906- 2.01 Concrete: Concrete shall conform to the requirements of Section 1006 of the specifications for Class B concrete. TABLE OF CONTENTS INDEX 1044 906- 2.02 Steel: Reinforcing bars and structural steel shall conform to the requirements of Section 1003 and Section 1004 of the specifications, respectively. ASTM A570, Grade 40 steel may be used as an alternate to ASTM A36 for the fabrication of cattle guard grill rails. 906- 2.03 Fencing: Fence posts and braces shall conform to the requirements of Sections 902 and 903 of the s pecifications. 906- 2.04 Backfill: Backfill material shall conform to the requirements of Subsection 203- 5 of the specifications. 906- 2.05 Wood: Wooden shims shall conform to the requirements shown on the plans. 906- 3 Construction Requirements: Excavation and backfill shall be in accordance with the requirements of Subsection 203- 5 of the specifications. Completed cattle guards shall be well drained. Cattle guards shall be cast -in-place or, at the option of the contractor, may be precast units. A list of approved precast units may be found on the Department’s Approved Products List (APL), available on the internet from the Arizona Transportation Research Center (ATRC), through its PRIDE program. The use of precast cattle guards shall be limited to roadway locations with maximum longitudinal grades of 6 percent. Precast units shall be installed to match the roadway centerline profile grade and the roadway cross- slope. Cattle guards shall be constructed in accordance with the details shown on the plans in reasonably close conformity to the lines and grades established or shown on the project plans. All fence and steel gates required shall be constructed as specified under Section 902 or 903 of the specifications, as applicable. Painting of structural steel shall be in accordance with the requirements of Section 610 of the specifications. Structural steel shall be painted with one coat of primer (Paint No. 1) in accordance with Secti on 1002 of the specifications. Painting of fence posts and gates shall be in accordance with the requirements of Section 902 or 903 of the specifications, as applicable. TABLE OF CONTENTS INDEX 1045 Existing cattle guards designated on the project plans for reconstruction shall be di smantled to the extent required and in such a manner as to preserve all materials or portions of the existing structure that are acceptable for use in the reconstructed structure. All removed concrete shall be disposed of in accordance with the requirements of Subsection 202- 3.03(A) of the specifications. Cattle guards to be reconstructed shall be constructed as specified herein, except that the materials required shall be salvaged to the extent possible from the existing cattle guards designated on the pl ans to be reconstructed or removed. Steel angles providing a bearing surface for each grille unit of a roadway cattle guard and wooden shims under railroad cattle guards shall be set to the required elevations with sufficient accuracy that no rocking under load of a grille unit or tread assembly can be observed and that no gap greater than 1/32 inch exists between any pair of bearing surfaces when the unit or assembly is not under load and is not spiked, welded or otherwise held in place. The fabrication and connections of grille units, angle units, and other steel elements shall conform to the requirements of Section 604. Either H-10 or H -20 loading will be designated on the project plans. 906- 4 Method of Measurement: Cattle guard, and reconstruct cattle g uard will be measured as a unit for each structure. Cattle guards consisting of a different number of grille units, different "H" loadings, different widths, or being new instead of reconstructed will be measured separately. 906- 5 Basis of Payment: The accepted quantities of cattle guards and reconstruct cattle guards, measured as provided above, will be paid for at the contract unit price each, complete in place, including excavation, structure backfill, structural steel, reinforcing steel, grilles, concrete, painting, wood shims and concrete slabs where required. Payment for fence or gates will be made as specified under Section 902 or 903 of the specifications, except that posts and braces attached to the cattle guard shall be considered as included in the cost of the cattle guard. TABLE OF CONTENTS INDEX 1046 SECTION 907 DAMPPROOFING AND WATERPROOFING CONCRETE SURFACES: 907- 1 Description: The work under this section shall consist of furnishing all materials and dampproofing concrete surfaces or waterproofing concrete structures and joints at the locations shown on the project plans and in accordance with the requirements of the plans and these specifications. 907- 2 Materials: 907- 2.01 General Requirements: The materials furnished by the contractor to dampproof or waterproof concrete structures as shown on the plans shall conform to the requirements of this section unless otherwise specified on the project plans or in the Special Provisions. Certificates of Compliance conforming to the requirements of Subsection 106.05 of the specifications shall be submitted. All materials shall be delivered in the original packages bearing the manufacturer's brand and label. The manufacturer’s label and/or the Certificate of Compliance shall state that the fabric has been saturated with asphalt. Fabrics saturated with coal -tar pitch are not acceptable. Materials shall be delivered on the work site a sufficient time before they are to be used to permit testing and analyzing, if required by the Engineer. The fabric shall be stored in a dry place, and the r olls shall not be stored on end. 907- 2.02 Prime Coats: An asphalt primer conforming to the requirements of ASTM D41 shall be used. 907- 2.03 Mop Coats: An asphalt which conforms to the requirements of ASTM D449 Type III, shall be used for the mop coats. 907- 2.04 Fabric: The fabric shall be bituminized cotton fabric conforming to the requirements of ASTM D173. The fabric shall be saturated with asphalt. TABLE OF CONTENTS INDEX 1047 907- 3 Construction Requirements: 907- 3.01 General: Bituminous coats shall not be applied in wet weather nor when the ambient temperature is below 50 degrees F. Concrete shall be dry and clean before the prime coat is applied. If bituminous material is used for curing, it may also serve as a priming coat, except that additional primer may be necessary before application of the mop coat. The material for mop coats shall be heated as necessary to aid application, but not above 350 degrees F. The bitumen shall be heated in kettles equipped with armored thermometers, and stirred frequently. Primer shall be allowed to cure properly before applying the mop coat. The primer shall be applied without heating at the approximate rate of 1 gallon per 100 square feet of surface with a three - or four -knot roofing brush. If asphalt primer is too thick to allow easy brushing, the material may be thinned by the addition of a small quantity of gasoline or naphtha. Work shall be so regulated that at the end of the day all fabric that has been applied will have received a mop coat. Concrete surfaces not to be dampproofed or waterproofed shall be protected from the spilling or otherwise marring of the surface with the bituminous materials. 907- 3.02 Dampproofing: Concrete surfaces to be dampproofed shall be given an asphalt primer and an asphalt mop coat. Each coat shall be applied uniformly, fully covering the surface, and shall be thoroughly worked into the surface. After the primer has cured, the mop coat shall be applied at the rate of approximately 50 pounds per 100 square f eet of surface to obtain a thickness of approximately 5/64 inch for the dampproof coating. Within the areas to be treated, all expansion or construction joints that are not protected with metal seals and which will be covered with earth in the completed st ructure shall be protected with a single layer or strip of bituminized cotton fabric not less than 12 inches wide. The fabric shall be laid evenly over the joints and in a fresh mopping of asphalt. The fabric shall be pressed into place and shall be smooth and free of creases. Joints in the fabric shall lap 12 inches. After placing, the fabric shall be sealed with a mop coat. TABLE OF CONTENTS INDEX 1048 Sections dampproofed shall be protected against mechanical injury and high temperature as soon as possible after application and until final acceptance of the work. 907- 3.03 Membrane Waterproofing:
Waterproofing may be used in conjunction with slab protection, sheet metal seals or other protective devices. Surfaces of concrete to be waterproofed shall be smooth and free from projections which might injure the waterproofing membrane. The surfaces shall be cleaned of dust, dirt, grease and loose particles or any foreign substances and shall be dry prior to placing waterproofing. The use of compressed air may be r equired in order to remove dust and loose dirt from corners and joints. Damp surfaces may be dried by covering with a layer of hot sand. The sand shall remain in place one or two hours, after which it shall be removed from enough surface to allow the wor k to proceed. After the surfaces of concrete to be waterproofed have been thoroughly cleaned and prior to the first hot mop coat, one coat of primer shall be applied. The primer shall be thoroughly worked into the concrete to give a uniform coating.
Two - or three- ply membrane waterproofing, as specified on the project plans, shall be applied after the primer has cured. Two -ply membrane waterproofing for the protection of footing construction joints or other designated areas shall consist of two layers of bituminized cotton fabric and three mop coats, placed alternately over the concrete surface previously treated with one coat of primer. Three- ply membrane waterproofing for the protection of decks and sides of structures or other designated areas shall consist of three layers of bituminized cotton fabric and four mop coats, placed alternately over the concrete surface previously treated with one coat of primer. The layers of the treated cotton fabric shall be laid so that all edges will lap at least 2 inches. The line of lap shall in every case be broken with that of the preceding layer of membrane. Each strip shall be laid in a fresh hot mop coat and when the specified number of layers has been laid, the entire surface shall be mopped. If practicable, the laying of the fabric shall begin at the lowest part of the surface to be waterproofed. The surface shall be completely covered with a heavy mop coat before the strip of fabric is put down. The mopping shall be so done that ther e will be no air bubbles, pockets or spots where the surface shows TABLE OF CONTENTS INDEX