I.S. 193:2006

Foreword
DECLARATION
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
   4.1 Timber
       4.1.1 Grades
       4.1.2 Resawn timber
       4.1.3 Finger jointed timber
   4.2 Mechanical fasteners
   4.3 Timber treatments
       4.3.1 Preservation
       4.3.2 Flame retardant treatment
       4.3.3 Effects of timber treatment
5 Assessment of structural adequacy
6 Design requirements
   6.1 Basic requirements
   6.2 Requirements for timber members
   6.3 Design loading
   6.4 Joint loads
   6.5 Application of loads
7 Roof truss design
   7.1 General
   7.2 Generalized analysis
   7.3 Single design method
       7.3.1 General
       7.3.2 Axial force
       7.3.3 Bending moments
       7.3.4 Member design
       7.3.5 Compression members
       7.3.6 Load sharing
       7.3.7 Multi-ply trusses
       7.3.8 Torsion
       7.3.9 Joints
       7.3.10 Deflection
8 Limitation for roof truss span and sizes
   8.1 General
9 Fabrication
   9.1 Staff and premises
   9.2 Equipment
   9.3 Assembly
       9.3.1 General
       9.3.2 Joints formed with metal plate fasteners
   9.4 Marking
10 Information for design and fabrication
   10.1 Information required by the truss designer
   10.2 Information required by the building designer
   10.3 Information required by the trussed fabricator
        prior to assembly
        10.3.1 Timber
        10.3.2 Connection devices
        10.3.3 Dimensions
        10.3.4 Fixing
        10.3.5 Treatment
11 Handling and storage
   11.1 General
   11.2 Handling
   11.3 Storage
        11.3.1 General
        11.3.2 Vertical storage
        11.3.3 Horizontal storage
12 Erection and site work
   12.1 Delivery inspection
   12.2 Modification and repair
   12.3 Erection
         12.3.1 General
         12.3.2 Vertical measurement
         12.3.3 Parallel measurement
         12.3.4 Position to end walls
         12.3.5 Fixing at points of permanent support
         12.3.6 Fixing of girder trusses
   12.4 Wall plates
         12.4.1 General
         12.4.2 Position
   12.5 Bracing
         12.5.1 General
         12.5.2 Minimum bracing requirements
         12.5.3 Temporary bracing during erection
   12.6 Support of water cistern and fixed plant
         12.6.1 General
         12.6.2 Minimum support
         12.6.3 Multiple cisterns
   12.7 Openings at ceiling ties and rafter levels
         12.7.1 General
         12.7.2 Openings in excess of 600 mm
   12.8 Tiling battens
         12.8.1 Minimum batten sizes
         12.8.2 Batten spacing
         12.8.3 Battens used for lateral stability
         12.8.4 Batten joints
         12.8.5 Batten fixing
         12.8.6 Truss alignment
   12.9 Gable ladders
   12.10 Hip roofs
13 General
   13.1 Records
   13.2 Future alterations and changes of use
   13.3 Chimneys and small windows
   13.4 Re-roofing
Annex A (normative) Standard roof bracing
Annex B (informative) Figures 1 to 10-2
Bibliography

Describes the requirement for material, fabrication and the use of trusses using punched metal plate fasteners for roofs in service class conditions 1 and 2.