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STEEL-FRAMED BUILDING

In order to explain the various features which enable the design of a multi-storey steel-framed building to make full use of the constructional material, it is necessary to start with the properties of the supporting structural system itself. The main constructional work, the cladding and the services should correspond to this.

The basic components of a steel structure are steel sections. These include thin-walled slender elements which possess high load-bearing capacity having at the same time small overall dimensions and low weight. The system that performs the load-bearing function, the structural steel frame, is assembled from these relatively slender steel members. The frame is thus a skeleton which does not have a space-enclosing function to perform, although it does provide support for such space-enclosing elements as floors, walls and partitions.

The steelwork is usually prefabricated in a factory, structural steelwork mass production techniques being favourable.

The successful use of the favourable properties of structural steelwork can be more efficiently achieved if the space-enclosing system is designed so that it is:

· composed of prefabricated units which ensure that the particular speed of erection of structural steelwork results in a short overall construction time;

· light, so that the overall weight of the building is minimized;

· adaptable to flexible internal layout of the floor space in the steel-framed building and to modification of its components;

· suitable for the specific properties and features of the structural steel frame;

· economical from the point of view of fire protection.

The open arrangement of the structural steel frame enables the installation and subsequent modification of services and equipment in both the vertical and horizontal directions.

Notes:

constructional material конструкционный материал

favourable adj. удобный, подходящий

load-bearing capacity несущая способность

make use of использовать

skeleton n. каркас

1. Why is it necessary to know the properties of the supporting structural system?

2. What are the basic components of a steel structure?

3. What kind of elements are they?

4. What is assembled from these members?

5. What is the function the structural steel frame performs?

6. What is the one it does not?

7. Which production techniques are favourable for structural steelwork?

8. What are the requirements to the space-enclosing system?

9. What does the open arrangement of the structural steel frame enable?