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Seismic Restraint Manual: Guidelines for Mechanical Systems, 3rd Edition, 2008

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FOREWORD
SEISMIC RESTRAINT TASK FORCE
NOTICE TO USERS OF THIS PUBLICATION
TABLE OF CONTENTS
CHAPTER 1 INTRODUCTION [Go to Page]
1.1 OVERVIEW
1.2 WHAT ARE SEISMIC LOADS?
1.3 WHAT HAPPENS DURING AN EARTHQUAKE?
1.4 HOW TO RESIST SEISMIC LOADS
1.5 KINDS OF BRACING
1.6 WHY DIFFERING REQUIREMENTS?
CHAPTER 2 INSTRUCTIONS FOR USING THE GUIDELINES [Go to Page]
2.1 THE SEISMIC HAZARD LEVEL (SHL)
2.2 HOW TO READ THE SIZING TABLES
2.3 USING THE SIZING TABLES
2.4 EXAMPLE: DUCT BRACING
CHAPTER 3 GENERAL REQUIREMENTS [Go to Page]
3.1 GENERAL REQUIREMENTS
3.2 MATERIAL SPECIFICATIONS
3.3 GENERAL REQUIREMENTS FOR BRACING OF DUCTS
3.4 GENERAL REQUIREMENTS FOR BRACING OF PIPES
3.5 ITEMS TO BE PROVIDED BY THE DESIGN PROFESSIONALS
3.6 NOTES ON ATTACHMENT TO THE BUILDING STRUCTURE
Table 3-1 Standard Sheet Metal Gages
Table 3-2 Minimum Allowable Cable Strength
Table 3-3 Minimum Allowable Design Values for Expansion Anchors
CHAPTER 4 DETAIL DRAWINGS OF BRACING [Go to Page]
4.1 INSTRUCTIONS FOR BRACING INDIVIDUALLY SUPPORTED PIPE
EXAMPLE 1. AT PIPE DROP TO MECHANICAL EQUIPMENT
FIGURE 4-1 TYPICAL LOCATIONS OF BRACING
FIGURE 4-2 SIDE BRACING FOR RECTANGULAR DUCTS
FIGURE 4-3 SIDE BRACING FOR RECTANGULAR DUCTS
FIGURE 4-4 CABLE SIDE BRACING FOR RECTANGULAR DUCTS
FIGURE 4-5 SIDE BRACING FOR RECTANGULAR DUCTS
FIGURE 4-6 CENTER BRACING FOR RECTANGULAR DUCTS
FIGURE 4-7 CABLE CENTER BRACING FOR RECTANGULAR DUCTS
FIGURE 4-8 FLOOR SUPPORTED DUCT
FIGURE 4-9 SINGLE HANGER BRACING FOR ROUND DUCTS 33-36 INCHES (838-900 MM)
FIGURE 4-10 SINGLE HANGER CABLE BRACING FOR ROUND DUCTS 33-36 INCHES (838-900 MM)
FIGURE 4-11 DOUBLE HANGER BRACING FOR ROUND DUCTS UP TO 84 INCHES (2100 MM)
FIGURE 4-12 DOUBLE HANGER BRACING FOR ROUND DUCTS UP TO 84 INCHES (2100 MM)
FIGURE 4-13 TRANSVERSE BRACING FOR PIPES
FIGURE 4-14 STRUT BRACING FOR PIPES
FIGURE 4-15 ALTERNATE ATTACHMENT TO HANGER FOR PIPE BRACING
FIGURE 4-16 LONGITUDINAL BRACING FOR PIPES
FIGURE 4-17 ALTERNATE BRACING FOR PIPES
FIGURE 4-18 CABLE BRACING FOR PIPES
FIGURE 4-19 LONGITUDINAL CABLE BRACING FOR PIPES
FIGURE 4-20 STRUT BRACING FOR PIPE TRAPEZE
FIGURE 4-21 CABLE BRACING FOR PIPE TRAPEZE
FIGURE 4-22 FLOOR SUPPORTED PIPES
CHAPTER 5 TABLES FOR SEISMIC HAZARD LEVEL A [Go to Page]
5.1 USE OF TABLES
Table 5-1 Side Bracing For Rectangular Ducts, SHL A, L=2 ft 8 in. (Max.)
Table 5-1M Side Bracing For Rectangular Ducts, SHL A, L=.81 m (Max.)
Table 5-2 Side Bracing for Rectangular Ducts with Rod Hangers, SHL A
Table 5-2M Side Bracing for Rectangular Ducts with Rod Hangers, SHL A
Table 5-3 Center Bracing For Rectangular Ducts, SHL A, L=7 ft
Table 5-3M Center Bracing For Rectangular Ducts, SHL A, L=2.1 m
Table 5-4 Center Bracing For Rectangular Ducts, SHL A, L=10 ft
Table 5-4M Center Bracing For Rectangular Ducts, SHL A, L=3.0 m
Table 5-5 Floor Supported Ducts, SHL A
Table 5-5M Floor Supported Ducts, SHL A
Table 5-6 Bracing For Round Ducts, SHL A
Table 5-6M Bracing For Round Ducts, SHL A
Table 5-7 Schedule for Bracing Pipes and Conduit, SHL A
Table 5-7M Schedule for Bracing Pipes and Conduit, SHL A
Table 5-8 Schedule for Bracing Pipes on Trapeze, SHL A
Table 5-8M Schedule for Bracing Pipes on Trapeze, SHL A
Table 5-9 Floor Supported Pipes, SHL A
Table 5-9M Floor Supported Pipes, SHL A
CHAPTER 6 TABLES FOR SEISMIC HAZARD LEVEL B [Go to Page]
6.1 USE OF TABLES
Table 6-1 Side Bracing For Rectangular Ducts, SHL B, L=2 ft 8 in. (Max.)
Table 6-1M Side Bracing For Rectangular Ducts, SHL B, L=0.81m (Max.)
Table 6-2 Side Bracing for Rectangular Ducts with Rod Hangers, SHL B
Table 6-2M Side Bracing for Rectangular Ducts with Rod Hangers, SHL B
Table 6-3 Center Bracing For Rectangular Ducts, SHL B, L=7 ft
Table 6-3M Center Bracing For Rectangular Ducts, SHL B, L=2.1 m
Table 6-4 Center Bracing For Rectangular Ducts, SHL B, L=10 ft
Table 6-4M Center Bracing For Rectangular Ducts, SHL B, L=3.0 m
Table 6-5 Floor Supported Ducts, SHL B
Table 6-5M Floor Supported Ducts, SHL B
Table 6-6 Bracing For Round Ducts, SHL B
Table 6-6M Bracing For Round Ducts, SHL B
Table 6-7 Schedule for Bracing Pipes and Conduit, SHL B
Table 6-7M Schedule for Bracing Pipes and Conduit, SHL B
Table 6-8 Schedule for Bracing Pipes on Trapeze, SHL B
Table 6-8M Schedule for Bracing Pipes on Trapeze, SHL B
Table 6-9 Floor Supported Pipes, SHL B
Table 6-9M Floor Supported Pipes, SHL B
CHAPTER 7 TABLES FOR SEISMIC HAZARD LEVEL C [Go to Page]
7.1 USE OF TABLES
Table 7-1 Side Bracing For Rectangular Ducts, SHL C, L=2 ft 8 in. (Max.)
Table 7-1M Side Bracing For Rectangular Ducts, SHL C, L=0.81m (Max.)
Table 7-2 Side Bracing for Rectangular Ducts with Rod Hangers, SHL C
Table 7-2M Side Bracing for Rectangular Ducts with Rod Hangers, SHL C
Table 7-3 Center Bracing For Rectangular Ducts, SHL C, L=7 ft
Table 7-3M Center Bracing For Rectangular Ducts, SHL C, L=2.1 m
Table 7-4 Center Bracing For Rectangular Ducts, SHL C, L=10 ft
Table 7-4M Center Bracing For Rectangular Ducts, SHL C, L=3.0 m
Table 7-5 Floor Supported Ducts, SHL C
Table 7-5M Floor Supported Ducts, SHL C
Table 7-6 Bracing For Round Ducts, SHL C
Table 7-6M Bracing For Round Ducts, SHL C
Table 7-7 Schedule for Bracing Pipes and Conduit, SHL C
Table 7-7M Schedule for Bracing Pipes and Conduit, SHL C
Table 7-8 Schedule for Bracing Pipes on Trapeze, SHL C
Table 7-8M Schedule for Bracing Pipes on Trapeze, SHL C
Table 7-9 Floor Supported Pipes, SHL C
Table 7-9M Floor Supported Pipes, SHL C
CHAPTER 8 TABLES FOR SEISMIC HAZARD LEVEL D [Go to Page]
8.1 USE OF TABLES
Table 8-1 Side Bracing For Rectangular Ducts, SHL D, L=2 ft 8 in. (Max.)
Table 8-1M Side Bracing For Rectangular Ducts, SHL D, L=0.81m (Max.)
Table 8-2 Side Bracing for Rectangular Ducts with Rod Hangers, SHL D
Table 8-2M Side Bracing for Rectangular Ducts with Rod Hangers, SHL D
Table 8-3 Center Bracing For Rectangular Ducts, SHL D, L=7 ft
Table 8-3M Center Bracing For Rectangular Ducts, SHL D, L=2.1 m
Table 8-4 Center Bracing For Rectangular Ducts, SHL D, L=10 ft
Table 8-4M Center Bracing For Rectangular Ducts, SHL D, L=3.0 m
Table 8-5 Floor Supported Ducts, SHL D
Table 8-5M Floor Supported Ducts, SHL D
Table 8-6 Bracing For Round Ducts, SHL D
Table 8-6M Bracing For Round Ducts, SHL D
Table 8-7 Schedule for Bracing Pipes and Conduit, SHL D
Table 8-7M Schedule for Bracing Pipes and Conduit, SHL D
Table 8-8 Schedule for Bracing Pipes on Trapeze, SHL D
Table 8-8M Schedule for Bracing Pipes on Trapeze, SHL D
Table 8-9 Floor Supported Pipes, SHL D
Table 8-9M Floor Supported Pipes, SHL D
CHAPTER 9 DETAILS OF CONNECTIONS TO STRUCTURAL MEMBERS [Go to Page]
9.1 INTRODUCTION
Table 9-1 Schedule for Typical Connections to Structural Supporting Members1
Table 9-1M Schedule for Typical Connections to Structural Supporting Members1
FIGURE 9-1 CONNECTIONS TO CONCRETE
FIGURE 9-1B CONNECTIONS TO CONCRETE
FIGURE 9-2 ADJUSTABLE CONNECTIONS TO CONCRETE
FIGURE 9-3 ALTERNATE HINGED CONNECTIONS TO CONCRETE
FIGURE 9-4 ALTERNATE CONNECTIONS TO CONCRETE
FIGURE 9-5 ALTERNATE CONNECTIONS TO CONCRETE
FIGURE 9-6 CONNECTIONS TO CONCRETE FILL ON STEEL DECK
FIGURE 9-7 CONNECTIONS TO CONCRETE
FIGURE 9-8 CONNECTIONS TO STEEL
FIGURE 9-9 CONNECTIONS TO OPEN WEB STEEL JOISTS
FIGURE 9-10 ALTERNATE CONNECTION TO OPEN WEB STEEL JOISTS
FIGURE 9-11 CONNECTIONS TO STEEL
FIGURE 9-12 CONNECTIONS TO STEEL
FIGURE 9-13 DUCTS HUNG BELOW STEEL BEAMS
FIGURE 9-14 ACCEPTABLE DETAILS-WIRE CONNECTIONS TO STRUCTURE
FIGURE 9-15 HANGER CONNECTION TO WOOD
FIGURE 9-16 CONNECTIONS TO WOOD I-JOIST
FIGURE 9-17 CONNECTIONS TO WOOD
CHAPTER 10 MISCELLANEOUS CONNECTIONS [Go to Page]
10.1 INTRODUCTION
FIGURE 10-1 CABLE CONNECTION TO DUCT FRAME
FIGURE 10-2 ALTERNATE CABLE CONNECTION TO DUCT FRAME
FIGURE 10-3 LONGITUDINAL CABLE CONNECTION TO DUCT HANGER
FIGURE 10-4 ALTERNATE LONGITUDINAL CABLE BRACING CONNECTION TO DUCT HANGER
FIGURE 10-5 CABLE END CONNECTION
FIGURE 10-6 PIPE STRUT CONNECTIONS
FIGURE 10-7 CONNECTIONS FOR FRAMING CHANNEL
FIGURE 10-8 HANGER ROD CONNECTIONS
FIGURE 10-9 HUBLESS CAST IRON PIPE
FIGURE 10-10 RISER BRACING FOR HUBLESS PIPES
FIGURE 10-11 FRAMING CHANNEL
FIGURE 10-12 CONNECTIONS FOR PIPES ON TRAPEZE
FIGURE 10-13 ALTERNATE STIFFENER CONNECTION
FIGURE 10-14 SAFETY SUPPORTS FOR CEILIING-MOUNTED DISTRIBUTION DEVICE
FIGURE 10-15 SEISMIC JOINTS IN PIPES
FIGURE 10-16 TRANSVERSE BRACE AT STEAM PIPES
FIGURE 10-17 WELDED TABS
FIGURE 10-18 STIFFENERS AND SADDLES AT PIPE CLAMPS
FIGURE 10-19 SEISMIC BRACING OF PIPES ON ISOLATORS
APPENDIX A DETERMINING THE SEISMIC HAZARD LEVEL [Go to Page]

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Seismic Restraint Manual: Guidelines for Mechanical Systems, 3rd Edition, 2008