AASHTO M196-16 pdf free download
AASHTO M196-16 pdf free download.Corrugated Aluminum Pipe for Sewers and Drains.
7.3.2. All rivets shall be driven cold in such a manner that the sheets shall be drawn tightly together throughout the entire lap. The center of a rivet shall be no closer than twice its diameter from the edge of the sheet. The distance between the centerlines of the two rows of rivets. where two rows are required, shall not be less than 38 mm. All rivets shall have neat, workmanlike, and full hemispherical heads or heads of a form acceptable to the purchaser, shall be driven without bending, and shall completely fill the hole.
7.4. Helical Lock Sea,ns—The lock seam for Type I pipe shall be formed in the tangent element of the corrugation profile with its center near the neutral axis of the corrugation profile. The lock seam for Type IA pipe shall be in the valley of the corrugation, shall be spaced not more than 760 mm apart, and shall be formed from both the liner and the shell in the same general manner as Type I helical lock seam pipe. The lock seam for Type lR pipe shall be formed in the flat zone of the pipe wall, midway between two ribs.
7.4.1. The edges of the sheets within the cross section of the lock seam shall lap at least 4.0 mm for pipe 250 mm or less in diameter and at least 7.9 mm for pipe greater than 250 mm in diameter, with an occasional tolerance of—lO percent of lap width allowable. The lapped surfaces shall be in tight contact. The profile of the sheet shall include a retaining offset adjacent to the 180-degree fold (as described in T 249) of one sheet thickness on one side of the lock seam, or one-half sheet thickness on both sides of the lock scam, at the fabricator’s option. There shall be no visual cracks in the metal, loss of metal-to-metal contact, or excessive angularity on the interior of the 180-degree fold of metal at the completion of forming the lock seam. The lock seam shall be mechanically staked (indented) at periodic intervals, or otherwise specially constructed to prevent slippage.
7.4.2. Specimens cut from production pipe normal to and across the lock seam shall develop the tensile strength as provided in Table 4, when tested according to T 249. For Type IA pipe, the lock seam strength shall be as tabulated based on the thickness of the corrugated shell.
9.2. Requirements—Coupling bands shall be fabricated to lap on an equal portion of each of the pipe sections to be connected. The ends of the bands shall lap or be fabricated to fonn a tightly closed joint upon installation. Coupling band thickness shall conform to the requirements in Table 10. based on the sheet thickness of the pipe lobe connected, except as provided in Sections 9.2.1 and 9.2.2. The band width shall be not less than as shown in Table 11. The bands shall be connected in a manner approved by the purchaser with suitable aluminum or galvanized steel devices, such as angles, or integrally or separately formed and attached flanges, bolted with bolts as described in Section 6.4; bars and straps; wedge lock and straps; or lugs. Coupling bands shall be fastened with the following size of bolts: pipe diameters 450 mm and less—M 10 diameter; pipe diameters 525 mm and greater—M 12 diameter.AASHTO M196-16 pdf download.
