SPECIFICATION 25 All directional acoustical pipe anchor, consisting of two sizes of steel tubing separated by a minimum 1/2” (12mm) thick 60 durometer neoprene. Vertical restraint shall be provided by similar material arranged to prevent vertical travel in either direction. Allowable loads on the isolation material should not exceed 500 psi (.35 kg/mm2) and the…
SPECIFICATION 24 lexible stainless steel hose shall have stainless steel braid and carbon steel fittings. Sizes 3” (75mm) and larger shall be flanged. Smaller sizes shall have male nipples. Minimum lengths shall be as tabulated: Flanged 3″ x 14″ (75 x 350mm) 6″ x 20″ (150 x 500mm) 12″ x 28″ (300 x 700mm) 4″…
SPECIFICATION 23 Flexible spherical expansion joints shall employ peroxide cured EPDM in the covers, liners and Kevlar® tire cord frictioning. Any substitutions must have equal or superior physical and chemical characteristics. Solid steel rings shall be used within the raised face rubber flanged ends to prevent pullout. Flexible cable bead wire is not acceptable. Sizes…
SPECIFICATION 22 – SRSC Seismic Rooftop Curb Curb mounted rooftop equipment shall be mounted on spring isolation curbs. The lower member shall consist of a sheet metal or structural steel sections containing adjustable and removable steel springs that support the upper floating section. The upper frame must provide continuous support for the equipment and must…
SPECIFICATION 21 ibration isolation manufacturer shall furnish rectangular steel concrete pouring forms for floating and inertia foundations. Bases for split case pumps shall be large enough to pro- vide for suction and discharge elbows. Bases shall be a minimum of 1/12 of the longest dimension of the base but not less than 6” (150mm). The…
SPECIFICATION 20 ibration isolation manufacturer shall furnish integral structural steel bases. Rectangular bases are preferred for all equipment. Centrifugal refrigeration machines and pump bases may be T or L shaped where space is a problem. Pump bases for split case pump shall include supports for suction and discharge elbows. All perimeter members shall be steel…
SPECIFICATION 19 emale wedge anchors are preferred in floor locations so isolators or equipment can be slid into place after the anchors are installed. Anchors shall be manufactured from full diameter wire, and shall have a safety shoulder to fully support the wedge ring under load. Female wedge anchors shall have an evaluation report number…
SPECIFICATION 18 tud wedge anchors shall be manufactured from full diameter wire, not from undersized wire that is “rolled up” to create the thread. The stud anchor shall also have a safety shoulder which fully supports the wedge ring under load. The stud anchors shall have an evaluation report number from the I.C.B.O Evaluation Service,…
SPECIFICATION 17 All directional seismic snubbers shall consist of interlocking steel members restrained by shock absorbent rubber materials compounded to bridge bearing specifications. Elastomeric materials shall be replaceable and a minimum of 3/4” (19mm) thick. Rated loadings shall not exceed 1000 psi (.7kg/mm2). Snubbers shall be manufactured with an air gap between hard and resilient…
SPECIFICATION 16 All-directional seismic snubbers shall consist of interlocking steel members restrained by a one-piece molded neoprene bushing of bridge bearing neoprene. Bushing shall be replace- able and a minimum of 1/4” (6mm) thick. Rated loadings shall not exceed 1000 psi (.7kg/ mm2). A minimum air gap of 1/8” (3mm) shall be incorporated in the…