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Plastics




Materials other than reinforced concrete are also being widely used in modern construction for prefabrication. The plastics that were unknown only a few decades ago have become extremely important and widely used for construction purposes. The plastics being used nowadays possess many advantages. First of all they are extremely light and their tensile strength is greater than that of many metals. Besides, they are weather-resistant and resistant to attacks by industrial fumes and to a great number of chemical substances. Some of the examples of the constructive use of plastic materials have been domes housing radar antennae and electronic equipment. Such domes built in America and Canada are as high as 116 feet.


Fig. 15. The Royal Palace. Stockholm

Fig. 16. City Theatre with movable walls

Fig. 17. The Open-Air Museum

Fig. 18. Timber sawing mill


162 Material for Reading, Translating and Comprehension


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Fig. 19. Notre-Dame. Paris

Fig. 20. An entirely new

concept of industrialised

housing called "Habitat"

constructed experimentally at

Expo '67. Canada

 


The panels of the domes are made of polystyrene and polyurethane foam and are protected by glass cloth cemented to the fume panels with epoxy resin. Some other dome structures are made from panels of thin sheets of reinforced fibreglass. Up till that time fibre-glass was familiar as a roofing material. Now it is becoming more and more popular in the manufacture of panels. The methods by which plastic shapes are produced has led4o a new approach to constructional and architectural forms.

7. Canada. "Habitat"

Multiple housing known as "Habitat" may serve as an example of unfamiliar forms of design. These new forms may be said to have the most stimulating effect on the development of construction and architecture. They provide the answer to problems that are still unsolved.




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