I.S. 444:1998
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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THE USE OF STRUCTURAL TIMBER IN BUILDINGS
Hardcopy , PDF
01-04-2010
English
01-01-1998
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Declaration
Introduction
Section one - General
1 Scope and field of application
1.1 Scope
1.2 Field of application
2 References
3 Definitions
4 Symbols and marking
4.1 Symbols for timber in strength classes
4.2 Symbols for strength graded timber
4.3 Symbols used to define span
4.4 Marking
Section two - Timber properties and design principles
5 Introduction
5.1 General
5.2 Timber properties
5.3 Finger jointed members
5.4 Design principles
5.5 Timber durability
6 Other requirements
6.1 Fire
6.2 Environment
Section three - Simplified design rules
7 Rules for the use of the permissible span tables
7.1 Introduction
7.2 Loading assumptions
7.3 Design assumptions
7.4 Deflection
7.5 Member sizes
7.6 Purlins
7.7 Joints
7.8 Studding
8 Rules for members not included in the permissible
span tables
8.1 Tiling battens
8.2 Bridging and strutting
8.3 Wall plates
Section four - Timber construction
9 Construction details
9.1 General
9.2 Notching and drilling
9.3 Flat roofs
9.4 Construction tolerances
Tables
1 Strength Classes - Combustion of species and visual
strength grades
2 Strength Classes - Permissible stress and moduli
values
3 Design Loads
4 Design criteria
5a Floor joists (domestic without partition)
5b Floor joists (office without partition)
5c Floor joists (office with fixed lightweight
partition)
6a Ceiling joists (for pitched roofs of 20 degree to
40 degree)
6b Ceiling joists (for pitched roofs of 20 degree to
40 degree) supporting domestic water cistern
7a Roof rafters without intermediate purlin support
(for roofs with pitches of 20 degree to 40 degree)
7b Roof rafters with intermediate purlin support
lapped at purlin support (for roofs with pitches of
20 degree to 40 degree)
7c Roof rafters with intermediate purlin support
continuous at purlin support (for roofs with pitches
of 20 degree to 40 degree)
8a Flat roof joists without access for fire escape or
maintenance (for roof pitches not exceeding 10
degree)
8b Flat roof joists with access for fire escape or
maintenance (for roof pitches not exceeding 10
degree)
9a Purlins for roofs with pitches of 20 degree to 40
degree C14-C16
9b Purlins for roofs with pitches of 20 degree to 40
degree C18-C22
9c Purlins for roofs with pitches of 20 degree to 40
degree C24-C27
10a Studding members 44 mm x 100 mm (domestic loading)
10b Studding members 44 mm x 100 mm (office loading)
Figures
1 General view of roof structure
2 Definition of spans
3 Water cistern support
4 Floor joist details
5 Purlin span
6 Notching and drilling
Specifies timber of given species and stress grades into Strength classes and it also permits the classification by machine.
| DevelopmentNote |
Supersedes I.S. SR 11. (03/2003)
|
| DocumentType |
Standard
|
| Pages |
30
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
| I.S. 193:2006 | TIMBER TRUSSES FOR ROOFS |
| I.C.P. 2:2002 | SLATING AND TILING |
| I.S. EN 335-1:2006 | DURABILITY OF WOOD AND WOOD-BASED PRODUCTS - DEFINITION OF USE CLASSES - PART 1: GENERAL |
| I.S. 325-1:1986 | CODE OF PRACTICE FOR USE OF MASONRY - PART 1: STRUCTURAL USE OF UNREINFORCED MASONRY |
| I.C.P. 2:2002 | SLATING AND TILING |
| I.S. EN 45013:1989 | GENERAL CRITERIA FOR CERTIFICATION BODIES OPERATING CERTIFICATION OF PERSONNEL |
| I.S. EN 335-2:2006 | DURABILITY OF WOOD AND WOOD-BASED PRODUCTS - DEFINITION OF USE CLASSES - PART 2: APPLICATION TO SOLID WOOD |
| 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 335-3:1996 | DURABILITY OF WOOD AND WOOD-BASED PRODUCTS - DEFINITION OF HAZARD CLASSES OF BIOLOGICAL ATTACK - PART 3: APPLICATION TO WOOD-BASED PANELS |
| I.S. ENV 1995-1-1:1995 | EUROCODE 5 - DESIGN OF TIMBER STRUCTURES - PART 1-1: GENERAL RULES AND RULES FOR BUILDINGS |
| BS 5268-4.1:1978 | STRUCTURAL USE OF TIMBER - PART 4: FIRE RESISTANCE OF TIMBER STRUCTURES - SECTION 4.1: RECOMMENDATIONS FOR CALCULATING FIRE RESISTANCE OF TIMBER MEMBERS |
| BS 5268-4.2(1990) : 1990 | STRUCTURAL USE OF TIMBER - FIRE RESISTANCE OF TIMBER STRUCTURES - RECOMMENDATION FOR CALCULATING FIRE RESISTANCE OF TIMBER STUD WALLS AND JOISTED FLOOR CONSTRUCTIONS |
| I.S. EN 460:1994 | DURABILITY OF WOOD AND WOOD BASED PRODUCTS - NATURAL DURABILITY OF SOLID WOOD - GUIDE TO THE DURABILITY REQUIREMENTS FOR WOOD TO BE USED IN HAZARD CLASSES |
| I.S. EN 518:1995 | STRUCTURAL TIMBER - GRADING - REQUIREMENTS FOR VISUAL STRENGTH GRADING STANDARDS |
| I.S. EN 351-1:2007 | DURABILITY OF WOOD AND WOOD-BASED PRODUCTS - PRESERVATIVE-TREATED SOLID WOOD - PART 1: CLASSIFICATION OF PRESERVATIVE PENETRATION AND RETENTION |
| I.S. EN 350-2:1994 | DURABILITY OF WOOD AND WOOD BASED PRODUCTS - NATURAL DURABILITY OF SOLID WOOD - GUIDE TO NATURAL DURABILITY AND TREATABILITY OF SELECTED WOOD SPECIES OF IMPORTANCE IN EUROPE |
| I.S. 325-2:1995 | CODE OF PRACTICE FOR USE OF MASONRY - PART 2: MASONRY CONSTRUCTION |
| I.S. EN 519:1995 | STRUCTURAL TIMBER - GRADING - REQUIREMENTS FOR MACHINE STRENGTH GRADED TIMBER AND GRADING MACHINES |
| I.S. EN 338:2016 | STRUCTURAL TIMBER - STRENGTH CLASSES |
| I.S. 193:2006 | TIMBER TRUSSES FOR ROOFS |
| I.S. EN 385:2002 | FINGER JOINTED STRUCTURAL TIMBER - PERFORMANCE REQUIREMENTS AND MINIMUM PRODUCTION REQUIREMENTS |
| 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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