BS 449 was first issued in 1932 and was revised in December 1935, July 1937,
July 1948 and May 1959. It was reset and reprinted in February 1965
incorporating amendments Nos. 1 to 5 and reprinted in October 1967
incorporating amendments Nos. 6 and 7.
When a programme of Codes of Practice for Buildings was drawn up in 1942
under the aegis of the Ministry of Works, a Code of Practice for the structural use
of steel in buildings was included in a series for all types of building construction:
this was later (1948) issued as CP 113....
The structural design of steelwork is based on BS 5950 in the UK and
countries following this code. The title of this code is given below:
BS 5950 Structural use of steelwork in building.
This section has been compiled to help designers in the UK and USA to
appreciate the principal differences and similarities of applying Eurocode 3:
Part 1.1 (EC3) (originally European standard ENV 1993-1-1).
This section presents and discusses the properties of structural steels that are of importance
in design and construction. Designers should be familiar with these properties so that they
can select the most economical combination of suitable steels for each application and use
the materials efficiently and safely.
In accordance with contemporary practice, the steels described in this section are given
the names of the corresponding specifications of ASTM, 100 Barr Harbor Dr., West Conshohocken,
In the following calculation procedures, the design of steel members is executed in accordance with
the Specification for the Design, Fabrication and Erection of Structural Steel for Buildings of the
American Institute of Steel Construction. This specification is presented in the AISC Manual of Steel
Most allowable stresses are functions of the yield-point stress, denoted as Fy in the Manual. The
appendix of the Specification presents the allowable stresses associated with each grade of structural
steel together with tables intended to expedite the design.