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I.S. 255:1983

Superseded

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PRECAST REINFORCED CONCRETE LINTELS

Available format(s)

Hardcopy , PDF

Superseded date

05-08-2011

Language(s)

English

Published date

01-01-1983

Publisher

National Standards Authority of Ireland

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Declaration
Foreword
1 Scope
2 Definitions
   2.1 Basic module
   2.2 Characteristic strength
   2.3 Component
   2.4 Co-ordinating dimension
   2.5 Co-ordinating size
   2.6 Deviation
   2.7 Modular co-ordination
   2.8 Work size
3 Materials
   3.1 Cement
   3.2 Aggregates
   3.3 Water
   3.4 Additives or admixtures
   3.5 Reinforcement
   3.6 Care and cleanliness of reinforcement
   3.7 The use of materials
4 Length of lintels
   4.1 Co-ordinating length
   4.2 Work size length
   4.3 Non-modular lengths
   4.4 Preferred lengths
5 Cross-section of lintels
   5.1 Co-ordinating widths (thickness)
   5.2 Co-ordinating height
   5.3 Permitted deviations
6 Bow or twist
   6.1 Bow or twist
   6.2 Method of measuring bow or twist
7 General
   7.1 Moulds
   7.2 Finish
   7.3 Casting
   7.4 Freedom from defects
   7.5 Throating
8 Concrete
   8.1 Testing
   8.2 Concrete strength
   8.3 Low temperature
   8.4 Curing of concrete
   8.5 Durability
   8.6 Time of delivery
9 Steel
   9.1 Main (bottom) steel
   9.2 Top steel
10 Inserts
11 Performance requirements
   11.1 Load-bearing strength
   11.2 Testing
   11.3 Proof test
12 Quality control
   12.1 Records
   12.2 Load-bearing test
   12.3 Testing procedure
13 Verification of compliance
14 Information for users
15 Marking and ordering
APPENDICES
A Load testing
B Reference standards
ACKNOWLEDGEMENT

Gives requirements for precast reinforced concrete lintels suitable for use over doors and windows.

DocumentType	Standard
Pages	28
PublisherName	National Standards Authority of Ireland
Status	Superseded
SupersededBy	I.S. EN 845-2:2013

BS 1881-4(1970) : LATEST
BS CP110-1(1972) : LATEST	CODE OF PRACTICE FOR THE STRUCTURAL USE OF CONCRETE
BS 5075-1:1982	Concrete admixtures Specification for accelerating admixtures, retarding admixtures and water reducing admixtures
BS 4482(1969) : AMD 2174
BS 5977-1:1981	Lintels Method for assessment of load
BS 4251:1974	Specification for truck type concrete mixers
ISO 1791:1983	Building construction Modular co-ordination Vocabulary
ISO 1006:1983	Building construction Modular coordination Basic module
BS CP110-2(1972) : LATEST	CODE OF PRACTICE FOR THE STRUCTURAL USE OF CONCRETE
BS 1881-3(1970) : LATEST
ISO 1803:1997	Building construction Tolerances Expression of dimensional accuracy Principles and terminology
BS 1881-1:1970	Methods of testing concrete Method of mixing and sampling fresh concrete in the laboratory