10-68 C111/A21.11. Insertion valves shall have a minimum design working water pressure
of 200 psi .
2.Pipe-Seated Insertion Valves Use a pipe- seated insertion valve composed of a tapping sleeve assembly and a valve bonnet. Use ductile iron or Type 304 stainless steel tapping sleeve type bodies. Use either the split sleeve type with mechanical joint ends or the full circle type with double seals. Manufacture the outlet flange to mate with the bonnet. For buried service use insertion val ves with non- rising stems, 2 inch square operating nuts, O -ring seals and which open by turning counterclockwise. Insertion valves shall have a minimum design water pressure of 200 psi. Coat iron bodies and bonnets at the factory with an epoxy in conformance with AWWA C210 or AWWA C213.
E.Plug Valves Use plug valves which conform to AWWA C517. Provide mechanical joint ends conforming to AWWA C111/A21.11 . 1036 -8 SLEEVES, COUPLINGS AND MISCELLANEOUS
A.Tapping Sleeves Use ductile iron or Type 304 stainless steel tapping sleeves pressure rated at 200 psi. Use either the split sleeve type with mechanical joint ends or the full circle type with double seals. Manufacture the outlet flange to mate with the tapping valve flange.
B.Transition Sleeves and Couplings Use sleeve type couplings for transitioning between plain ends of different pipe types. Manufacture couplings in conformance with AWWA C219 for a rated working pressure of 200 psi. Coat the coupling at the factory with an epoxy in conformance with AWWA C210 or AWWA C213. 1036 -9 SERVICE LINE VALVES AND FITTINGS Use corporation stops and curb stops of all bronze material and high -pressure construction conforming to AWWA C800. Use tapping saddles of high- pressure construction, shaped to conform to the pipe and in conformance with AWWA C800. Use high- pressure fittings manufactured in conformance with AWWA C800. 1040 -1 BRICK Use clay or shale brick that meets ASTM C62 or ASTM C216 for Grade SW, except as otherwise provided herein . Use brick of uniform standard commercial size, with straight and parallel edges and square corners that are burned hard and entirely true, free from injurious cracks and flaws, tough, strong and have a clear ring when struck together. The sides, ends and faces of all brick shall be pl ane surfaces at right angles and parallel to each other. Brick of the same manufacturer shall not vary more than ± 1/16 inch in thickness, ± 1/8 inch in width and ± 1/4 inch in length. Concrete brick may be used instead of clay or shale brick when designat ed in the plan s or in the specifications. Concrete brick shall meet ASTM C55 for Grade S -II except that the absorption of brick used in minor drainage structures shall not exceed 10 pcf .
10-69 1040 -2 Concrete Building Block
Use concrete building block from sources that participate in the Department ’s Solid Concrete Masonry Brick/Unit QC/QA Program . A list of these sources in North Carolina and adjoining states is available from the Materials and Tests Unit in Raleigh. Use concrete building block that meets ASTM C90. Block shall be pink in color and substantially free from chips and cracks. Use solid concrete block instead of clay brick for minor drainage structures that meet ASTM C139 except that the nominal dimensions shall be 4 inches x 8 inches x 16 inches . Concrete block for block manholes shall meet ASTM C139. 1040 -3 CONCRETE PAVING BLOCK Use concrete paving block from sources that participate in the Department ’s Solid Concrete Masonry Brick/Unit QC/QA Program. A list of these sources in North Carolina and adjoining states is available from the Materials and Tests Unit in Raleigh. Use concrete paving block that meet ASTM C139 , except that the nom inal dimensions shall be 4 inches x 8 inches x 16 inches . The block shall have a uniform surface color and texture. 1040 -4 SEGMENTAL RETAINING WALL UNITS Use segmental retaining wall (SRW) units from sou rces that participate in the Department ’s Solid Concrete Masonry Segmental Retaining Wall Units QC/QA Program . A list of these sources in North Carolina and adjoining states is available from the Materials and Tests Unit in Raleigh. Use freeze- thaw durabl e SRW units when noted in the contract . Unless required otherwise in the contract, provide SRW units with a vertical straight face and a concrete gray color with no tints, dyes or pigments. Do not begin unit production until sample SRW units of the type, face and color proposed for the project are approved by the Engineer . Use SRW units that meet ASTM C1372 except for Table 1040- 1 requirements.
A.Weight loss for 4 of 5 specimens after 150 cycles in water . 1040 -5 CEMENT Portland cement shall meet Article 1024 -1. Masonry cement shall meet ASTM C91. 1040 -6 HYDRATED LIME Hydrated lime shall meet ASTM C207 for Type N. 1040 -7 MORTAR SAND Mortar sand shall meet Article 1014 -1, except it shall meet the gradation requirements for No. 4S sand shown in Table 1005- 2. 1040 -8 WATER Water shall meet Article 1024 -4. 36 TABLE 1040 -1 SRW UNIT REQUIREMENTS Property Requirement Test Method Compressive Strength for SRW Units 4,000 psi min ASTM C140 Compressive Strength for Freeze -Thaw Durable SRW Units 5,500 psi min ASTM C140 Absorption 5% max ASTM C140 Durability for Freeze -Thaw Durable SRW Units 1% maxA ASTM C1262
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 484–485 of 857.