Complete Specification All of the specification paragraphs are generic in their descriptions and there is never any need to change those descriptions as they apply to all installations. If you have accepted our explanations and like our wording, your specification would appear exactly as it is shown bellow in the PDF document. The paragraph sections…
Blower Minimum Deflection Guide When blowers are 60 HP (45kw) or larger, select deflection requirements for next larger span. A minimum of 2.5”(65mm) should be used unless larger deflections are called for on the chart or these fans are located in the lowest sub-basement or on a slab on grade.
Specification Selection Guide To make a selection using the Specification Selection Guide click here to view all specifications. NOTES: 1. Minimum deflection called for in this specification are not ‘nominal’ but certifiable minimums. The 0.75”(19mm), 1.5”(38mm), 2.5”(64mm), 3.5”(89mm), and 4.5”(114mm) minimums should be selected from manufacturers nominal 1”(25mm), 2”(50mm), 3”(75mm), 4”(100mm) and 5”(125mm) series respectively.…
Typical Isolator Schedule Filled In The information for the vibration isolation specification columns is found in the Specification Selection Guide. You need only reference the type of equipment and fill in the appropriate specification letters and deflections based on the floor span in the equipment’s location. In the given example we are assuming that the…
Specification Writing All of the specification paragraphs are generic in their descriptions and there is never any need to change those descriptions as they apply to all installations. If you have accepted our explanations and like our wording, your specification would appear exactly as shown here. The paragraph sections are in the format of the American…
MOLDING ISOLATION BEARINGS The following pictures will give you a better idea of the process of manufacturing isolation bearings. Norman J. Mason President, Mason Industries, Inc.
SPRING ISOLATORS Not all problems can be solved with rubber isolation pads. On page 2 we have indicated that the cut off point for rubber bearings is about 5.5 Hz. This would mean that the incoming frequency should not be lower than 16.5 Hz just to maintain the traditional but often unsatisfactory 90% theoretical efficiency.…
Noise and vibration isolators are used to prevent the downward transmission of vibration from a machine to a structure, the upward transfer from the structure to a sensitive machine or to isolate a complete building from ground vibration. Ground vibration may be generated by above ground or under ground passenger or freight trains, or heavy…
ARCHITECTURAL CEILING HANGERS Floating Floors remain the most effective way of reducing sound transmission and vibration from the floor above. However, there are many situations where a floating floor is impractical or not economically feasible, so an isolated ceiling becomes the practical choice. There are two types of ceilings. There are the simple acoustical tile…
