Vibration and Seismic Controls For

MPS Master

SECTION 23 05 48

VIBRATION AND SEISMIC CONTROLS FOR HVAC PIPING AND EQUIPMENT

PART - GENERAL

SUMMARY

Section Includes: Include labor, materials, equipment, and accessories to furnish and install vibration isolation equipment for equipment specified in this Contract.

SUBMITTALS

Shop Drawings: Contractor shall submit a Shop Drawing portfolio showing vibration isolators to be used, a schedule indicating units served, and type and number of isolators per unit for approval by Architect/Engineer.

PART - PRODUCTS

MANUFACTURERS

Acceptable Manufacturers for Vibration Isolation Equipment: Subject to compliance with requirements of the Contract Documents, acceptable manufacturers are as follows:

Amber Booth Iso-Flex Kinetics Mason Industries, Inc Vibration Eliminator Company VMC

VIBRATION ISOLATION EQUIPMENT

Schedule: The following schedule of vibration isolation equipment is specified for reference with the type desired for each piece of equipment being noted under the equipment section.

Type A: Mason Industries Type C housed spring mounts with neoprene non-skid pad on bottom, minimum static deflection 3/4-inch and 0.8 ratio spring diameter to compressed height.

Type B: Mason Industries Type SLFH free spring mounts with leveling adjustment, base plate with bolt holes, and a 1-to-1 horizontal-vertical constant, minimum static deflection of 1 inch and as called for, and 0.8 ratio of spring diameter to compressed height.

Type C: Mason Industries Type N Neoprene-in-shear mounts, non-skid surface top and bottom, minimum static deflection 0.4 inch.

Type D: Mason Industries Type ND double deflection mounts, non-skid surface top and bottom, minimum static deflection 0.4 inch.

Type E: Mason Industries Type DNHS combination spring and double deflection neoprene hangers, minimum deflection 1.4 inch.

23 05 48 - 1 Vibration and Seismic Controls For HVAC Piping and Equipment MPS Master

SECTION 23 05 48

Type F: Mason Industries Type HD hanger, double deflection neoprene unit, minimum static deflection 0.4 inch.

Type G: Mason Industries Type W neoprene pad, 5/16 inch thick, with 50 pounds per square inch maximum loading.

Type H: Mason Industries Type NLD structural steel fan and motor base with integral motor slide rail, supported by a double deflection neoprene mount. Structure shall be rigid enough so as to prevent distortion on drive side and eliminate the requirement of vertical snubbers. Minimum static deflection 0.4 inch.

Type I: Mason Industries Type SLF structural steel fan and motor base with integral motor slide rail, supported on Type SL bare springs with a 1-to-1 horizontal-vertical constant, structure shall be rigid enough to eliminate the use of any vertical snubbers and prevent drive distortion. Minimum static deflection 1 inch.

Type J: Mason Industries Type SLR multiple spring mounts with leveling adjustment, snubbers, base plate with neoprene acoustical isolation pads and (4) bolt holes, hot-dip galvanized and minimum static deflection 3/4 inch, and 0.8 ratio spring diameter to compressed height.

Type K: Mason Industries Type 30 angularity spring hanger with neoprene seat, minimum deflection 0.8 inch.

Pumps and Motor Bases:

Units Above Grade: Mount pumps on floors above grade over 5 horsepower and provide with Mason Industries, Type K, bases constructed of 6-inch channels with 1/2-inch reinforcing rods welded in place 6 inches on center both ways, 1 1/2 inches above bottom with height saving brackets and Mason Industries Type SLF vibration isolators with 1 1/2-inch deflection anchored to floor and brackets. Pour frame solid with concrete and locate anchor bolts for pump in pour.

Units on Grade: Mount pumps located on grade on thickened concrete floor slab, top 4 inches above floor with 1/2-inch rubber expansion joint material between floor and perimeter of pump concrete pad. Pump assembly base shall have 5/8-inch thick by 3-inch wide neoprene waffle pad at all points of contact between pump base and concrete.

Floating Vibration Isolation Bases: Vibration isolator manufacturer shall furnish rectangular structural beam or channel concrete forms for floating foundations. Bases for split case pumps shall be large enough to provide support for suction and discharge base ells. Bases shall be not less than 6 inches in depth.

Forms shall include minimum concrete reinforcement consisting of 1/2-inch bars or angles welded in place on 6-inch centers, running both ways in a layer 1 1/2 inches above the bottom.

Forms shall be furnished with drilled steel members with sleeves welded below the holes to receive equipment anchor bolts where the anchor bolts fall in concrete locations.

23 05 48 - 2 Vibration and Seismic Controls For HVAC Piping and Equipment MPS Master

SECTION 23 05 48

Bases shall be furnished with concrete poured into forms and cured on-site.

Height saving brackets shall be employed in all mounting locations to maintain a 1-inch clearance below the base. Bases shall be equal to Mason Industries Type K or Owner approved equal.

PART - EXECUTION

INSTALLATION

Application: Meet requirements of manufacturer's instructions for installation and load application to vibration isolation materials and units.

Adjust to ensure that units do not exceed rated operating deflections or bottom out under loading, and are not short-circuited by other contacts or bearing points.

Remove space blocks and similar devices intended for any temporary protection against overloading during installation.

Anchor and attach units to structure and equipment as required for secure operation and to prevent displacement by normal forces.

Adjust leveling devices as required to distribute loading uniformly onto isolators.

Shim units where leveling devices cannot be used to distribute loading properly.

Motor Isolation: Install vibration isolators for mechanical motor-driven equipment.

Floating Vibration Isolation (Inertia) Bases: Install inertia bases of type and thickness, and isolators of type and static deflection as indicated.

Set steel bases for 1-inch clearance between housekeeping pad and base. Set concrete inertia bases for 2-inch clearance. Adjust equipment level.

Spring Isolators:

Provide spring isolators on piping connected to isolated equipment as follows:

3- to 4-Inch Diameter: First (3) points of support. 5- to 8-Inch Diameter: First (4) points of support. 10-Inch Diameter and Over: First (6) points of support.

Static deflection of first point shall be twice deflection of isolated equipment.

END OF SECTION

23 05 48 - 3 Vibration and Seismic Controls For HVAC Piping and Equipment