1 - AS 4744.1-2000 STEEL SHORING AND TRENCH LINING EQUIPMENT - DESIGN
4 - PREFACE
5 - CONTENTS
6 - FOREWORD
7 - SECTION 1 SCOPE AND GENERAL
7 - 1.1 SCOPE
7 - 1.2 APPLICATION
7 - 1.3 GENERAL
7 - 1.4 NEW DESIGNS AND INNOVATIONS
7 - 1.5 REFERENCED DOCUMENTS
8 - 1.6 NOTATION
9 - 1.7 DEFINITIONS
9 - 1.7.1 Characteristic system resistance (Rk)
9 - 1.7.2 Connecting point
9 - 1.7.3 Connector
9 - 1.7.4 Cutting edge
9 - 1.7.5 Dig and push
9 - 1.7.6 Extraction point
9 - 1.7.7 Handling point
9 - 1.7.8 Internal trench lining width (bc)
9 - 1.7.9 Lifting point
9 - 1.7.10 Lower module
9 - 1.7.11 Panel connector
9 - 1.7.12 Post
9 - 1.7.13 Pre- driven
10 - 1.7.14 Professional engineer
10 - 1.7.15 Pulling point
10 - 1.7.16 Strut working length
10 - 1.7.17 Racking
10 - 1.7.18 Slide rail
10 - 1.7.19 Strut
10 - 1.7.20 Trench lining systems
10 - 1.7.21 Trench width (b)
10 - 1.7.22 Bottom- strut clearance (hC)
10 - 1.7.23 Upper module
10 - 1.7.24 Panel
11 - SECTION 2 SYSTEM AND COMPONENTS - DESCRIPTION AND EXAMPLES
11 - 2.1 COMMON TRENCH LINING SYSTEMS
11 - 2.1.1 General
11 - 2.1.2 Trench boxes
12 - 2.1.3 Slide rail trench lining systems
14 - 2.1.4 Drag box
14 - 2.2 SUPPORTING COMPONENTS
14 - 2.2.1 Strut
15 - 2.2.2 Extension units
16 - 2.2.3 Post
16 - 2.2.4 Slide rail
16 - 2.3 STRUT TO PANEL/ SLIDE RAIL CONNECTION
16 - 2.3.1 Articulated connection
16 - 2.3.2 Clearance only connection
17 - 2.3.3 Fully restrained connection
17 - 2.4 PANEL TO PANEL CONNECTIONS
17 - 2.4.1 Separate panel connector with pin
18 - 2.4.2 Integral panel connector with bolt
19 - SECTION 3 DESIGNATION
19 - 3.1 PANEL DESIGNATION
19 - 3.2 STRUT DESIGNATION
19 - 3.3 SLIDE RAIL DESIGNATION
20 - SECTION 4 MATERIALS
21 - SECTION 5 DESIGN REQUIREMENTS
21 - 5.1 GENERAL REQUIREMENTS
22 - 5.2 MINIMUM RATED SYSTEM CAPACITY
22 - 5.3 MAXIMUM ELASTIC DEFLECTION
22 - 5.4 ATTACHMENT POINTS
22 - 5.4.1 Extraction points
22 - 5.4.2 Handling points
23 - 5.4.3 Slide rails
23 - 5.4.4 Lifting point angle
23 - 5.4.5 Extraction, connecting and pulling point design criteria
23 - 5.4.6 Drag box pulling point design critera
23 - 5.4.7 Handling point design criteria
23 - 5.4.8 Location of handling points
23 - 5.5 STRUTS
23 - 5.5.1 General
23 - 5.5.2 Minimum strut partial safety factor for action
23 - 5.5.3 Maximum strut working length
24 - 5.5.4 Type (i) struts
26 - 5.5.5 Strut connection
26 - 5.5.6 Strut component connection
26 - 5.5.7 Drag box leading strut
26 - 5.6 STRUT TO PANEL OR SLIDE RAIL CONNECTION
26 - 5.6.1 Vertical strut to panel rotation
26 - 5.6.2 Horizontal strut to panel rotation
26 - 5.6.3 Drag box connections
26 - 5.6.4 Strut to panel/ slide rail connections
27 - SECTION 6 INSTRUCTION MANUAL
27 - 6.1 GENERAL REQUIREMENTS
27 - 6.2 PRINCIPAL CONTENTS
28 - SECTION 7 MARKING
29 - SECTION 8 EVALUATION OF CONFORMITY
29 - 8.1 DECLARATION
29 - 8.2 PROVISION OF SPECIFICATIONS
30 - APPENDIX A - PARTIAL SAFETY FACTORS
31 - APPENDIX B - RELATIONSHIP BETWEEN LOADS AND RESISTANCE
32 - APPENDIX C - DETERMINATION OF EARTH PRESSURES AND STRUT LOADS USING EMPIRICAL PRESSURE ENVELOPES
34 - APPENDIX D - TYPICAL GROUND PARAMETERS
35 - APPENDIX E - ADDITIONAL LOADS
35 - E1 IMPOSED LOADS IMPARTED ON TRENCH SHORING DURING CONSTRUCTION
35 - E2 CONSTRUCTION PLANT
35 - E3 SOIL HEAPS
35 - E4 ADJACENT STRUCTURES
35 - E5 LATERAL PRESSURE ON THE SHORING DUE TO LOADS OTHER THAN UNIFORM SURCHARGE