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…
SPECIFICATION 15 Pipe clevis cross bolt braces are required in all restraint locations. They shall be special pur- pose preformed channels deep enough to be held in place by bolts passing over the cross bolt. Clevis cross braces shall have an Anchorage Preapproval “OPA” Number from OSHPD in the State of California. Clevis cross brace…
SPECIFICATION 14 Steel angles, sized to prevent buckling, shall be clamped to pipe or equipment rods utilizing a minimum of three ductile iron clamps at each restraint location when required. Welding of support rods is not acceptable. Rod clamp assemblies shall have an Anchorage Preapproval “OPA” Number from OSHPD in the State of California. Rod…
SPECIFICATION 13 eismic solid braces shall consist of steel angles or channels to resist seismic loads with a minimum safety factor of 2 and arranged to provide all directional restraint. Seismic solid brace end connectors shall be steel assemblies that swivel to the final installation angle and utilize two through bolts to provide proper attachment.…
SPECIFICATION 12 eismic Cable Restraints shall consist of galvanized steel aircraft cables sized to resist seismic loads with a minimum safety factor of two and arranged to provide all-directional restraint. Cables must be prestretched to achieve a certified minimum modulus of elasticity. Cable end connections shall be steel assemblies that swivel to final installation angle…