BS 5977-2:1983

Foreword
Cooperating organizations
Specification
Section one. General
1 Scope
2 Definitions
3 Information to be given to the manufacturer or
   supplier in an enquiry or order
Section two. Materials and workmanship
4 Materials
5 Workmanship
6 Identification of lintels
Section three. Design and testing
7 Performance
Appendices
A Information to be given to the manufacturer or
   supplier in an enquiry or order
B Load tests for lintels
C Tests for additional organic protective coatings
D Recommendations for installation of lintels
Tables
1 Protection of steel lintels to be used with separate
   damp-proof courses
2 Protection of steel lintels having integral damp-
   proof courses
3 British Standards for design of lintels
4 Classification of impact test results
Figures
1 Surfaces of lintels requiring additional protection
   (see table 2)
2 Typical two-part lintels
3 Outline diagram of pendulum for impact and abrasion
   test
4 Classification of abrasive impact test results:
   exposed galvanized surface in test area
5 Diagram of test cell
6 Typical resistance-time graph
7 Size of bearings
8 Zone of composite action and typical d.p.c.
   arrangement for a composite lintel

Requirements for concrete, steel and timber prefabricated lintels, including prefabricated elements used in composite lintels. Maximum span 4.5 m (single storey buildings) or 3.6 m (two or three storey buildings). Covers materials, protection against corrosion, design, workmanship, and includes an appendix giving recommendations for site installation.