Вопрос № 800560 - Английский язык

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Plywood siding materials are widely used in modern construction-business. They are popular because of their light weight and their relative cheapness. The cost of the material per unit area of wall is usually less than for other siding materials. Besides, labor costs are also relatively low. The reason for it is the fact that large sheets of plywood are more quickly installed than the boards of the same area. In many cases, if it is necessary, the sheathing can be eliminated from the building if plywood is used for siding. This operation, if it is performed, leads to further cost saving.
It should be taken into account that usually plywood sidings must be painted in order to save them for decay. But if they are produced from decay-resistant material, they can be left to weather effects without the surface coverage.

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Plywood 1_______ materials are widely used in modern construction business. They are 2_______ because of their light weight and their relative cheapness. The cost of the material per unit area of wall is usually less than for other siding materials. Besides, the labor costs are also relatively low. The reason for it is the fact that large 3_______ of plywood are more quickly installed than the boards of the same area. In many cases, if it is necessary, the sheathing can be eliminated from the building if 4_______ is used for siding. This operation, if it is performed, leads to further cost saving.

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The function of a cladding is to prevent the passage of air between indoors and outdoors of a building. For this purpose it is necessary to regulate air velocities within the building. Even small air leaks are extremely harmful. Why is it so?
It is because air leaks carry water through the wall, allow vapor to condensate inside the walls, and allow noises to penetrate the walls of the building from outside.
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What is the function of a cladding?

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Practically every modern building is supplied with stairways of some kind. A stairway is designed to provide a means of access between different floor levels of a building. Nowadays stairways are produced of various construction materials but the most popular among them are timber and reinforced concrete. Of them timber may be used for domestic stairs of all kinds because of its economical availability. As to reinforced concrete it is popular because of its durable qualities, great resistivity to decay and great resistance to fire. It should be taken into account that domestic timber stairs must be designed for safe and comfortable use by people of different ages.
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What are the most popular materials for stairways nowadays?

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Hypatia of Alexandria. Hypatia lived in Alexandria, Egypt from about AD 370 to AD 415. She was well-known for explaining difficult ideas very clearly and simply. Her work in geometry- the mathematics of shapes - helped mathematicians who lived much later to understand the movements of the planets in space. This may help people get to Mars one day!

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Modern buildings have three major parts. These are the superstructure, the substructure, and the foundation. The superstructure is above –ground part of a building; the substructure – its below-ground part. As to the third part – foundation – its function is of great importance as it serves to transfer the loads of a building into the upper stratum of earth – its soil.