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

WHR Neoprene Hangers Isolation reduces resonant vibration and decreases noise due to structure. This hanger uses neoprene and spring elements to avoid contact
between metals.

Usingthe WHR Ceiling Hanger Isolation to isolate the ceiling grid system and pipe and drain work.

WHR Neoprene Hangers shall be fail safe and consist of opposed washers sandwiching an AASHTO Bridge Bearing Quality LDS Rubber Element 11/8" 
thick. Dynamic Stiffness shall not exceed 1.4" nor the corrected frequency 12 Hz. Connections shall be made with 12 gauge wire top and bottom passing through hairpin loops attached to the opposing washers. Ceiling Hangers shall be Mason Industries type WHR. Submittals shall confirm AASHTO Quality and Dynamic Stiffness in addition to frequency.

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