Some design of reinforced concrete estructures made with precast units

Abstract

In this paper a description is given, more graphic than analytical, of the various prefabricated units, made of concrete, which could be useful both for structural and plastic purposes in architecture. If prefabrication is to be effective it is essential that similar parts should be repeated in large numbers: it is then that the economic advantage becomes noticeable. At present much attention is given to precast units which are suitable as form forming, or shaping units. But this involves difficulties, since the form originates in problems of strength and stability, and precast units must consequently adapt themselves to these requirements. Another question is the need that precast units should be easy to mould, and to produce in quantity, if they are to have advantage over other constructional media. There are also problems related to the handling, transport and storing of precast units, A unit which is very effective within a total structure may prove, for instance, very fragile when handled separately. It should also be essential that precast units have definite attachment points, from which it can be lifted and moved, to its final position. It will be appreciated that if precast units are to be really useful they must satisfy certain minimum requirements, both architectural and civil, whose attainment will require special care and study in their design. The author attempts to contribute in this sense and so give support to the large section of the building industry which would like to see a full exploitation of the obvious practical advantages which prefabrication offers.