Bases and Rails
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Fan and Motor Bases Type M, WF, GS and K
Vibration attenuation is dependent on base rigidity as well as isolator deflection. If a base becomes distorted because of weight distribution, belt pull or the torque introduced by a direct drive, the equipment will wear out more quickly and vibrate excessively because of the loss of alignment. Some of the symptoms are flapping belts, bouncing motor ends, noisy bearings and in extreme cases the fan wheel rubbing against the fan housing. Base resonance is another difficulty that can result from poor frame construction. If base members are light and long they will tend to resonate at low frequencies that may be sympathetic or close to the operating speeds of the fan or motor....
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Damping Compound Type MDC-10
Sheet metal surfaces transmit noise by vibrating at sound frequencies. Taking the ìringî out of these surfaces by applying MDC-10 Damping Compound substantially reduces noise transmission. Treatment is particularly effective on ductwork and roofdecks....
Steel Weights and Steel & Concrete Weights
STEEL?WEIGHTS?and?STEEL?&?CONCRETE?WEIGHTS?FOR?6"?and 10" BMK?(BOLTED MODULAR CONCRETE) BASES
Fan and Motor Technical Info. and Weights of KSL Bases
FAN AND MOTOR TECHNICAL INFORMATION AND WEIGHTS OF KSL BASES FOR FANS AND MOTORS....
Steel Channels with Double Deflection Neoprence Mountings
Type RND rails are structural steel channels furnished with double deflection neoprene mountings bolted to the web. All metal mount-ing parts are neoprene covered to avoid corrosion and provide a bottom friction surface. They need not be bolted to the floor but bolt holes are provided for those areas where bolting down is specified...........
Curb Mounted Rooftop Equipment Bases
CMAB Curb Mounted Aluminum Bases are an excellent one inch (25mm) deflection tool for isolating the noise and vibration generated by rooftop equipment from the occupied space below......
Bases For: Pumps, Blowers, Compressors, HVAC Units, etc.
Many years ago, we reduced the cost of concrete bases by introducing KIP mountings. These mountings are nailed to the inside of the contractorís wooden forms to provide side openings for the springs that elevate the base and isolate the equipment. KIP bases are structurally successful as the rigidity and strength of any base is dependent on the depth and the reinforcing, and not on the perimeter steel.
Rooftop Spring Curb
Mason Industries Rooftop Spring Isolation Curb (RSC) is the state of the art in rooftop unit (RTU) vibration control. By incorporating springs with 3/4î, 11/2î or 21/2î minimum specified deflection into a structural steel curb, Mason gives the systems designer freedom to locate equipment for maximum efficiency without undue concern for noise and vibration transmission....
Seismic Rooftop Spring Curb
In 1984 we introduced our RSC Rooftop Spring Curb incorporating 3/4î(19mm), 1 1/2î(38mm) or 2 1/2î (64mm) deflection springs. In 1994 we introduced our SRSC Seismic Rooftop Spring Curb. The SRSC has anchorage pre-approval ìOPAî number OPA-0207 from the Office of Statewide Health Planning and Development (OSHPD) in the state of California attesting to the maximum horizontal and vertical load ratings. These load ratings were achieved by destructive testing of full sized curbs, under the supervision of an independent consulting engineering firm.......
Sound Solutions
(Reprinted From SoundTrack) One of the most difficult problems which confronts HVAC mechanical engineers is the problem of controlling noise and vibration from rooftop units. Rooftop units are usually prepackaged, self-contained, air conditioning or refrigeration units which are mounted on top of the roof (air conditioning units are usually mounted on a factory built or site built curb). Rooftop units are common in warehouse, low-rise office, and retail structures, but they can also be found in hospitals, schools, and other commercial buildings.....
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