N

Product:
The base to be type RSC (Spring Mounted Inertia Bases – Rooftop Spring Curb), as manufactured by Mason UK Ltd.

Performance:
Mounting must have a minimum static deflection/compression of [VARIABLE DEFLECTION] under the operating load.

Geometry:
The ratio of the Spring diameter by the compressed spring height cannot be less than 0.8.
Springs to have a minimum additional overload capacity of 50% of the rated deflection/compression before becoming solid.

Housing:
Curb mounted rooftop equipment shall be mounted on spring isolation curbs.
The lower member shall consist of a sheet metal Z section containing adjustable and removable steel springs that support the upper floating section.

Installation:
The upper frame must provide continuous support for the equipment and must be captive so as to resiliently resist wind forces.
All directional neoprene snubber bushings shall be a minimum of 1/4”(6mm) thick.