By HAROLD SANDBANK
It would be difficult to give an exact definition of "prefabrication." In general, however, systems of prefabrication have aimed at increased production of houses through some application of quantity production techniques. The prefabrication movement increases in importance as the methods in use approach mass production with its possibilities in speed and lowered cost that will bring average incomes into the housing market.
Of the various methods projected for prefabricating houses, some have remained in the realm of ideas, others have been brought to practical demonstration and public use. These efforts have changed from simple modification of the conventional structure to the use of radically new materials and new construction methods.
In the following outline some of the more widely used methods and materials are listed and illustrated. Mention is also made of ideas that have influenced the field.
A number of ideas and special projections have definitely stimulated thinking, discussion and trends in the field of pre- fabrication. Among the earliest was the mast house.