ABSTRACT
The general principles of the design of continuous structures using either an elastic approach or a plastic approach have been set out in the previous chapter. Section 5 of BS 5950: Part 1 also provides more detailed guidance on certain aspects of the design of the main forms of continuous construction:
continuous beams portal frames (single storey) multistorey frames
In each case either an elastic or a plastic approach is possible. When using elastic design much of what has already been written in this
book remains applicable. Plastic design, on the other hand, may be used only providing certain restrictions are observed. Thus before dealing with its application to any particular type of structure, it is necessary to be clear on the conditions under which its use is valid.
