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Section terms to be familiar with:

LDS stands for Low Dynamic Stiffness AASHTO Bridge Bearing Natural Rubber to minimize noise and vibration transmission. Maximum Dynamic Stiffness is 1.4.

STC stands for Sound Transmission Class, which is a single-number rating of a material’s ability to resist sound transfer. The higher the STC rating the more noise is blocked.

INR stands for Impact Noise Rating, which is single-number rating of the material’s ability to resist the transfer of impact noise. The higher the INR rating the better the impact noise blocking.

Air Gaps – When dealing with monolithic building components such as a solid concrete, creating an air gap raises the STC significantly more than adding mass.

Floating Floors
Floating floors are secondary floors built above the structural floor with a 1” to 4” air gap between them. Typically floating floors are used for vibration, sound and impact isolation where they can dramatically increase Sound Transmission Class (STC) and Impact Noise Rating (INR). Common applications would be for a very noisy equipment room located over prime office space, a gymnasium, a theatre room or a music room.
Mason offers two very effective options for floating floors, the Mason Jack-Up Floor Slab System and the Form-Work System.

The Jack-Up system was originated in 1965 by Mason and has thousands of successful installations to its credit. With this system, mounts are placed along with rebar on the structural floor, concrete is poured and once cured the floor is jacked-up to the desired height.

The Form-Work System utilizes molded rubber mounts in set heights which are placed on the structural floor, covered with plywood and then covered with concrete.

Comprehensive Overview

Suspended Ceilings
While Floating Floors are the most effective way of reducing sound transmission and vibration from the floor above, there are situations where their application is not feasible. In these situations, a Suspended Ceiling can be a practical alternative. Suspended Ceilings are created using isolation hangers to suspend a gypsum barrier ceiling from the structural ceiling.

Comprehensive Overview

Isolated Walls
Where noise issues are occurring due to solid connections through structural walls, isolating walls are used to break those sound paths. Isolating walls are created by adding a secondary gypsum wall with an air gap between it and the structural wall.

Comprehensive Overview

Building Isolation
Entire buildings can be exposed to vibration generated from either above ground or underground vehicles or equipment. To curb the vibration from entering the building’s structure, isolators are placed at the base of the structure.

Comprehensive Overview

Jack-Up Floating Floor System Product Line

Form-work Floating Floor System Product LIne

Suspended Ceilings Product Line

Isolated Walls Product Line

Pipe Seals

Building Isolation Product Line

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