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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
English
01-01-1998
01-04-2010
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 |
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