JP Specialties Waterstop Fittings
Testing has shown that the majority of waterstop failures are caused when the waterstop must make directional changes. This is because directional changes, or fittings as they are commonly known, require special tools and skills that are not generally required for welding the straight edges of waterstops. Consequently, the fittings are either made wrong (edge welding); there is no tensile strength in the welds; the material is charred, burnt or otherwise contaminated; or the worker's lack of experience causes unreliable welds. Shop Made Fittings are machine welded using an XLT-2000 Waterstop Splicing Table. JP Specialties invented the XLT-2000 and retains the patent on the technology. The XLT-2000 applies force evenly, creating monolithic, homogeneous and contaminant-free welds.
Why Specify Shop Made Fittings?Shop Made Fittings are recognized and specified worldwide by major engineering firms. The U.S. Army Corps of Engineers also specified Shop Made Fittings in the July, 1995 revision of CEGS Section 03250. Shop Made Fittings are specified because they work. Edge welding waterstop seriously compromises the integrity of any project. Even the limited movement of concrete during the coefficient of expansion and contraction can be too much for edge welded waterstop. The edge welded waterstop lacks the proper tensile strength and does not maintain the characteristics of the parent material (bulb or rib continuity). Consequently, the waterstop often tears at the most critical junction: the change of direction. Since all waterstops are designed to act as a continuous, fluid-tight diaphragm which fluids (generally water) traverse, the structure that uses edge welded waterstop will naturally leak, as fluids migrate to any tears in the weld and pass through to the other side of the joint. Structures that use Shop Made Fittings will significantly reduce these waterstop failures. The tensile strength of the weld will be at least 80% of the parent material. Continuity of the bulbs and ribs shall be maintained across the weld. In other words, the waterstop will perform as intended and last the life of the structure.
Why Use Shop Made Fittings?JP Specialties certified welding crew can efficiently manufacture large quantities of top-quality Shop Made Fittings with speed on our exclusive XLT-2000 Waterstop Splicing Tables. Therefore, we are able to pass the savings on to the end user: the contractor. Besides saving money, the contractor who uses Shop Made Fittings will save time. A standard flat cross has twelve cuts and seven welds. By using Shop Made Fittings, all of the cuts and three of the welds will be eliminated. The number of welds can be further reduced by using modules.
What are Shop Made Fitting Modules?Modules are custom Shop Made Fittings that are delivered to the jobsite as a complete unit, rather than a collection of parts. For example: a box culvert with a longitudinal joint would typically require four vertical ells and two flat crosses. Even with Shop Made Fittings this would be sixteen butt welds (straight edge to straight edge) for the contractor in the field. With proper dimensions from building plans, JP Specialties will manufacture entire box culvert modules. In the box culvert example conveyed above, using modules, only four butt welds remain to be done in the field. Modules work best when they are specified by the engineer during the design phase of the project, but they can also be used effectively during the construction phase with close collaboration between JP Specialties and the contractor. JP Specialties can clearly interpret project plans during any phase of construction and render how Shop Made Fittings or modules will improve the quality of your structure and save you money.
How Much Do Shop Made Fittings Cost?Shop Made Fittings can be supplied at a cost savings to the contractor on most jobs, when compared to the time and labor necessary to fabricate the Waterstop in the field. Providing Shop Made Fittings will not only be more cost effective, but will ensure a timely installation, thus saving costly delays. In addition, our Shop Made Fittings will enhance your ability to meet stringent hydraulic tests required by engineers.
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Waterstops for Environmental Compliance of Liquid Tight Concrete Structures is a targeted course of instruction and professional development for engineering firms engaged in the design of chemical, industrial, and environmental projects such as secondary containment of hazardous waste, industrial waste water, ozone contractors, and others. The course is technical in nature and describes waterstop's role in fluid-proofing concrete joints, chemical resistant polymers and steels, and state and federal regulations of compliance.
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