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7/2011 <br />15060 - 5 <br />Use of this type of restraint is restricted to underground mechanical joint or push on joint <br />applications and in general may not be used above grade or as a substitute for flanged joints. A ny <br />above grade applications will require submission of shop drawings of the piping system where they <br />are utilized and may require design by a Florida registered Professional Engineer. <br /> <br />In any mechanical joint or push on joint underground piping system of 30-inch nominal diameter <br />and below this type of restraint may be utilized as design or field conditions dictate. <br />In sizes 36, 42 and 48-inch the prior written permission of the Engineer is required. In instances <br />where written permission cannot be immediately obtained, verbal permission will be allowed but is <br />to be confirmed in writing on the first business day following the substitution. If this type of restraint <br />is used without permission or if permission is denied, the Contractor making the substitution shall <br />be solely responsible for all costs, both direct and indirect, of immediately correcting the restraint <br />system to the satisfaction of the Engineer. <br /> <br />It is recognized that flange adapters of this type form a useful tool for adjusting lengths of flanged <br />pipe runs in instances such as runs with a large number of deflections where it is almost impossible <br />to predict all lengths correctly. Therefore, a very restricted number of these joint s will be allowed in <br />instances where it can be clearly shown to the satisfaction of the Engineer that they are necessary. <br />This application is restricted to 20-inch nominal diameter and below. Further, this use shall be <br />designed in and shall not be made as a field substitution. In all instances flange adapters shall be <br />rated for a minimum working pressure of 250 psi with a minimum safety factor of 2:1. In no case <br />will these flange adapters be used as a general substitute for standard flanged joints. <br /> <br />The Department absolutely reserves the right to require other forms of restraint where in the <br />opinion of the Engineer the use of this form of restraint is not in the best interest of the Department <br />and his decision shall be final. <br /> <br />The Megalug restraint systems manufactured by EBAA Iron Sales, Eastland Texas, will be <br />considered the standard of quality for comparison purposes and if the Department has any doubts <br />as to the durability, quality or ability to restrain of a proffered substitute, the entity offering the <br />substitute shall bear the entire burden of proving this equality to the complete satisfaction of the <br />Engineer. Other manufacturers producing this type of restraint system shall submit data with their <br />shop drawings showing that their restraint system has been in the marketplace for a minimum of <br />three years in this country. <br /> <br />Each thrust-resistant mechanical joint or push on joint made up with this type of restraint and the <br />pipe and fitting of which it is a part, shall be designed to withstand an axial thrust from an internal <br />pipeline pressure of at least 150 psi at bulkhead conditions without reduction because of its <br />position in the pipeline nor for support from external thrust blocks. <br /> <br />This type of joint restraint shall not be used above grade except as previously specified nor shall it <br />be used as a carrier pipe within a casing. This type of restraint shall not be used with tape wrapped <br />pipe or with too great a coating thickness on the exterior of the pipe. <br /> <br /> Restrained Push-on Joints (Single Gasket Non-Gasket Restrained) <br /> <br />Restrained joints in pipe and fittings shall be of the single gasket push-on type, and shall conform <br />to all applicable provisions of ANSI/AWWA Standard C111/A21.11-00, except that gaskets for pipe <br />and fittings shall be neoprene, where so specified, and the following requirements: <br /> <br />Thickness of the pipe barrel remaining at grooves cut, if required in the design of restrained end <br />joints, shall not be less than the nominal wall thickness of equal sized non-restrained pipe as