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I.S. 193:2006

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

TIMBER TRUSSES FOR ROOFS
Available format(s)

Hardcopy , PDF

Superseded date

01-04-2010

Language(s)

English

Published date

01-01-2006

Preview

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.

DocumentType
Standard
Pages
56
PublisherName
National Standards Authority of Ireland
Status
Superseded
SupersededBy

I.S. 325-2:1995 CODE OF PRACTICE FOR USE OF MASONRY - PART 2: MASONRY CONSTRUCTION
I.C.P. 2:2002 SLATING AND TILING
I.S. 444:1998 THE USE OF STRUCTURAL TIMBER IN BUILDINGS

I.S. EN 14081-1:2016 TIMBER STRUCTURES - STRENGTH GRADED STRUCTURAL TIMBER WITH RECTANGULAR CROSS SECTION - PART 1: GENERAL REQUIREMENTS
I.S. EN 301:2013 ADHESIVES, PHENOLIC AND AMINOPLASTIC, FOR LOAD-BEARING TIMBER STRUCTURES - CLASSIFICATION AND PERFORMANCE REQUIREMENTS
BS 8417:2003 Preservation of timber. Recommendations
I.S. EN 10326:2004 CONTINUOUSLY HOT-DIP COATED STRIP AND SHEET OF STRUCTURAL STEELS - TECHNICAL DELIVERY CONDITIONS
BS 6399-3(1988) : 1988 LOADING FOR BUILDINGS - PART 3: CODE OF PRACTICE FOR IMPOSED ROOF LOADS
I.S. EN 1912:2012 STRUCTURAL TIMBER - STRENGTH CLASSES - ASSIGNMENT OF VISUAL GRADES AND SPECIES
I.S. EN 595:1995 TIMBER STRUCTURES - TEST METHODS - TEST OF TRUSSES FOR THE DETERMINATION OF STRENGTH AND DEFORMATION BEHAVIOUR
I.S. EN 14081-3:2012 TIMBER STRUCTURES - STRENGTH GRADED STRUCTURAL TIMBER WITH RECTANGULAR CROSS SECTION - PART 3: MACHINE GRADING; ADDITIONAL REQUIREMENTS FOR FACTORY PRODUCTION CONTROL
I.S. 105-1:1977 WIRE AND CUT NAILS FOR BUILDING PURPOSES (METRIC)
ISO 2081:2008 Metallic and other inorganic coatings Electroplated coatings of zinc with supplementary treatments on iron or steel
I.S. 444:1998 THE USE OF STRUCTURAL TIMBER IN BUILDINGS
BS 6446:1984 Specification for manufacture of glued structural components of timber and wood based panel products
I.S. EN 14081-2:2010 TIMBER STRUCTURES - STRENGTH GRADED STRUCTURAL TIMBER WITH RECTANGULAR CROSS SECTION - PART 2: MACHINE GRADING; ADDITIONAL REQUIREMENTS FOR INITIAL TYPE TESTING
BS 648:1964 Schedule of weights of building materials
BS 1230-1:1985 Gypsum plasterboard Specification for plasterboard excluding materials submitted to secondary operations
I.S. EN 10088-2:2014 STAINLESS STEELS - PART 2: TECHNICAL DELIVERY CONDITIONS FOR SHEET/PLATE AND STRIP OF CORROSION RESISTING STEELS FOR GENERAL PURPOSES
I.S. EN 1995-1-1:2005 EUROCODE 5: DESIGN OF TIMBER STRUCTURES - PART 1-1: GENERAL - COMMON RULES AND RULES FOR BUILDINGS
I.S. EN 385:2002 FINGER JOINTED STRUCTURAL TIMBER - PERFORMANCE REQUIREMENTS AND MINIMUM PRODUCTION REQUIREMENTS
I.S. EN 14250:2010 TIMBER STRUCTURES - PRODUCT REQUIREMENTS FOR PREFABRICATED STRUCTURAL MEMBERS ASSEMBLED WITH PUNCHED METAL PLATE FASTENERS
I.S. EN 14081-4:2009 TIMBER STRUCTURES - STRENGTH GRADED STRUCTURAL TIMBER WITH RECTANGULAR CROSS SECTION - PART 4: MACHINE GRADING - GRADING MACHINE SETTINGS FOR MACHINE CONTROLLED SYSTEMS
I.S. EN 336:2013 STRUCTURAL TIMBER - SIZES, PERMITTED DEVIATIONS
I.S. 127:2015 STRUCTURAL TIMBER - VISUAL STRENGTH GRADING - SAWN SOFTWOODS WITH RECTANGULAR CROSS-SECTION

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