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Product:
The base to be type CMAB (Spring Mounted Inertia Bases – Curb Mounted Aluminium), 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 vibration isolation bases that fit over the roof curb and under the isolated equipment.

Installation:
Wind resistance shall be provided by means of resilient snubbers in the corners with a minimum clearance of 6mm.