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ASHRAE Standard 171 Method of Testing Seismic Restraint Devices for HVAC&R Equipment (ANSI/ASHRAE Approved), 2008
- 171_2008_FINAL.pdf [Go to Page]
- FOREWORD
- 1. Purpose
- 2. Scope
- 2.1 Types of Seismic Restraints
- 2.2 Types of Materials
- 3. DEFINITIONS
- 4. PRECAUTIONS
- 4.1 Keep in mind that the properties of the test specimen may be changed by any bending, forming, or welding that it is subjected to. It is important to take this possible change into account when determining load values for testing. Otherwise, the t...
- 4.2 If any test specimen fails because of mechanical reasons such as failure of the test equipment or improper specimen preparation, it may be discarded and another specimen used.
- 5. REQUIREMENTS
- 5.1 To comply with this standard, the seismic restraint equipment shall be tested to determine the maximum force a restraint can withstand without sustaining breakage or permanent deformation according to the requirements of Sections 6, 7, 8, and 9.
- 6. INSTRUMENTS
- 6.1 Instruments with the degree of accuracy noted below shall be used for the following measurements:
- 6.2 Instruments shall be calibrated at least once per year and a record shall be kept containing, at a minimum, the date of calibration, the method of calibration, and the traceability to national standards.
- 7. TESTING APPARATUS
- 7.1 Test Platform. Test fixtures shall provide component attachments to simulate typical field installations as defined by the manufacturer’s installation instructions. Test fixtures and jigs shall be designed such that they neither help nor hinder...
- 7.2 Test Setup. Placement of the instrumentation shall be applied to fully measure the maximum effect of the load applied and to minimize the effects of distortion on the test fixture. Restraints shall be attached to the fixtures with hardware capabl...
- 7.3 Test Fixtures. Test fixtures and jigs shall be designed to hold the specimen in the proper orientation to allow loading in the required direction. Test fixtures shall be rigid enough to prevent distortion of the test fixture and provide specimen ...
- 8. METHODS OF TESTING
- 8.1 General. The seismic restraint equipment shall be installed and operated in accordance with the manufacturer’s instructions unless specifically required otherwise by the test method. The seismic restraint equipment shall be equipped with the ap...
- 8.2 Test Environment
- 9. TEST PROCEDURES
- Figure 1 Cable restraint systems.
- Figure 2 Angular distortion measurements.
- 9.1 Test Procedure for Cable Restraint Systems
- 9.2 Test Procedure for Combination Isolator/Restraints
- Figure 3 Combination isolator/restraints.
- Figure 4 Vertical tension and compression (Fv).
- Figure 6 Horizontal transverse loading (Fy).
- Figure 8 Forty-five degree lateral-vertical load (Fyv).
- Figure 5 Horizontal longitudinal loading (Fx).
- Figure 7 Forty-five degree longitudinal-vertical load (Fxv).
- Figure 9 Vertical tension and compression (Fv) with linkage bars to resist moments.
- Figure 10 Snubbers.
- Figure 12 Two-direction horizontal snubber.
- 9.3 Test Procedure for Seismic Snubbers
- Figure 11 Two-direction snubber.
- Figure 13 All-directional snubber.
- Figure 14 Possible test configuration for two-direction snubber.
- Figure 15 Test arrangement—two-direction snubber.
- 9.4 Test Procedure for Bumpers
- Figure 16 Test arrangement—all-directional snubber.
- Figure 17 Bumper.
- Figure 18 Bumper used to restrain a nonstructural component.
- Figure 19 Bumper in testing machine.
- 9.5 Test Procedure for Solid (Rigid) Bracing
- Figure 20 Rigid-brace restraint systems. [Go to Page]