The lower support curb shall be a formed channel fabricated of heavy gauge galvanized steel with a continuous 1-1/2 inch x 1-1/2 inch (38 mm x 38 mm) nominal wood nailer attached to the isolation support pedestals. Support of the RTU by weather seal attachment bolt heads is not permitted. The upper support rail shall consist of a structural channel with sufficient elevation above the spring to preclude interference with the rooftop equipment and permit access to inspect the isolation system after placement of the rooftop equipment. The upper support rail shall provide continuous structural support for the rooftop equipment and shall be designed to provide isolation against casingradiated vibration in the rooftop equipment housing and structure borne vibration from rotating and mechanical equipment in the rooftop package.
The isolation curb shall consist of an upper support rail with supply and return duct supports on which the equipment and duct openings rest and a lower support curb which is attached to the roof structure, separated by free-standing, unhoused, laterally stable steel springs. The vibration isolation curbs shall be complete assemblies designed to resiliently support equipment at the specified elevation and shall constitute a fully enclosed air- and weather-tight system. where motion due to wind loads must be minimized.Įasyflex Model EFRSI Seismic Control Restrained Spring Isolators are recommended as a noise and vibration isolator for mechanical equipment located near critically quiet areas when the equipment to be isolated has significant changes of weight during maintenance operations and for equipment subjected to seismic events, external forces, or high wind loads.All rooftop air-handling units shall be supported by vibration isolation curbs as manufactured by Kinetics Noise Control. Easyflex Model EFRSI Spring Isolators are recommended for the isolation of vibration produced by equipment carrying a large fluid load which may be drained, such as boilers and chillers, and specially for the isolation fo cooling towers, air-cooled condensers, etc. Custom isolators with higher deflection and greater load capabilities are also available. EFRSI isolators are available with deflections upto 2" (50 mm) and with load capacities to 5,000 kg. To assure stability, the springs have a lateral spring stiffness than 1.2 times the rated vertical stiffness and are designed to provide a minimum of 50% overload capacity. Holes are provided in all isolators for bolting to the structure and to the supported equipment. Spring elements are complete with internal noise isolation pads and have an adjusting and leveling bolt as a part of the top load plate assembly.
Restrained spring isolators free#
The housings also provide a constant free and operating height to facilitate installation. Floor Lift Slab Mount – Spring (Jack Up – Spring)Įasyflex Model EFRSI Seismic Control Restrained Spring Vibration Isolators consist of free-standing, large diameter, laterally stable steel springs assembled into welded steel housing assemblies fabricated to limit vertical movement of the isolated equipment if equipment loads are reduced or if the equipment is subjected to large external forces such as a seismic events.Floor Lift Slab Mount – Rubber (Jack Up – Rubber).
Stainless Steel Braided Pump Connectors With Flanges.Stainless Steel Braided Pump Connectors With Threaded Connections.Flexible Connector Fan Coil & AHUs Type EFFCUC.Stainless Steel Pump Connectors Type EFMHPC.Stainless Steel Braided Pump Connectors With Grooved Connections.580 PSI High Pressure Reinforced Metallic Expansion Joints.
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