Floating Floor Structural Test PURPOSE OF TESTS To determine maximum loadings on reinforced concrete slabs supported by flexible .elements of unlimited deflection spaced 48″ apart. LOADING METHOD Placement of.500 lbs and 1000 lbs certified steel weights provided by the Howe Richardson Scale Company. 500 lb weights were approximately 12″x 12″ x 12″. 1000 lb weights…
Floating Floor Acoustical Field Test The acoustical tests discussed and reported here were conducted by Cerami and Associates, Inc. on July 1 and 2, 1974 in the T.V. Studio of Standard Oil of Indiana Company at the above referenced test location. The purpose of these tests was to measure the Impact Noise Rating (INR) and…
Intro Walls are isolated to prevent flanking around floating floors or to improve the STC between adjacent spaces. The word “flanking” is used to describe a vibration or noise path that goes around an isolated component. If a structure is built with continuous walls so that in cross section it is as an H and…
Intro When you need a floating floor to dramatically Increase your Sound Transmission Class and Impact Noise Rating Why not use the MASON JACK-UP FLOOR SLAB SYSTEM and eliminate the cost and need for: Combustible, rot prone plywood forms. A myriad of transmission paths through closely spaced supports. Moisture retaining fiberglass infill that plugs sub-drains…
INTRODUCTION TO SEISMIC VIBRATION CONTROL SPECIFICATIONS FOR OFFICE BUILDINGS, COLLEGES, HOSPITAL, THEATERS AND SIMILAR STRUCTURES To The Specifying Engineer: Our company started calling on West Coast engineering firms as early as 1960. We opened our L.A. sales and applications office in 1965 when it became important to provide local service to the most seismically active…
DISCUSSION The very term ‘vibration isolation’ suggests the use of resilient materials between a structure and a machine. The classic model is a mass on top of large coil springs located near the four corners, as in Figure 1. While this is a perfectly practical system for vibration control, when dealing with earthquakes we must…
Sound & Vibration Earthquake control of resiliently mounted systems is an area of primary concern for acoustical and mechanical engineers. The Northridge, CA earthquake of January 17th, 1994, provided several valuable lessons regarding protection of these systems. The lessons learned from this earthquake are highlighted with actual site photographs that are useful and dramatic. The…
A PICTORIAL STUDY OF SEISMIC DAMAGE AND THE USE OF PROPER SAFEGUARDS On an early January morning in 1994, the Northridge area of Southern California was shaken by an earthquake that measured 6.6 on the Richter scale and lasted approximately 30 seconds. The repercussions are still being felt throughout the engineering community After billions of…
PIPE RISER SUPPORT SYSTEM By: Steve Fey Senior Field Application Engineer Supporting pipe risers subject to thermal expansion and contraction in hi-rise HVAC Systems has presented tremendous problems to the Design Engineer. Standard carbon steel piping expands or contracts at a rate of 0.8” (20 mm) per 100ft (30.5 m) per 100°F (37.8°C), so pipe…
