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            1. Giw the Russian for:

veneer plaster system gypsum-board installation

plaster-type ceiling finish comparatively cheap installation method

Read and translate the article.

Plaster-type finishes haw always been the most popular for walls and ceilings in wood frame buildings. They are comparatively cheap. Usually they are much cheaper than other types of finish. Among their advantages there is also a high degree of fire-resistance that gives considerable protection to the combustible frame. Afterthe Second Wbrld Wargypsum board became highly popular because of its lower cost and comparative ease of installation.

As to veneer plaster systems, they came into use also not long ago. I n most small buildings, all wall and ceiling surfaces arc covered with plaster or gypsum board. Some buildings are known to require fire walls, or fire separation walls between living units; in such buildings a gypsum board wall for fire resistance can be installed.

Such an installation eliminates the need to put up a wall of brick or concrete masonry.

204. Translate the following extract in writing. Use a dictionary if necessary-.

What is the thickness of block work? The load-bearing walls in single or two-storey housing the minimum thickness of block work is 90 mm. For three-storey housing it is equal to 140 mm. Non-block bearing block partitions may have the minimum of 60 mm.

TABLE VIII Types of Walls

interior wall

внутренняя стена

exterior w.

внешняя с.

smooth w.

гладкая с.

dead w.

глухая с.

main w.

капитальная с.

brick w.

кирпичная с.

thick, thin w.

толстая, тонкая с.

veneered w.

облицованная с.

Read the examples given in the table.

205. Mr work. tat your groupmate translate them a) from English into Russian; b) from Russian into English.

How can one keep water away from the wall?

Master the head words.

gravity - тяготение, сила тяжести to penetrate - проникать, про-

face - плоскость, поверхность питывать

force - сила to seal - закупорить, запереть

206. Read the following combinations. Translate them from Russian.

gravity dam — гравитационная плотина

force of gravity - сила тяжести, земное притяжение

watertight wall - водонепроницаемая стена

air current — воздушный поток

  1. Put down the corresponding adjective.

Model: necessarily - nccessary

traditionally -

carefully -

pract ically -

completely —

Read and translate the article.

When can water penetrate a wail? Three conditions are necessary. Firstly, there must be water present at the outer face of the wall. Secondly, there must be a crack or a hole (opening) in the wall through which the water can move. And thirdly, there must be a force that will move the water through this opening. If any of these conditions is absent, water will not penetrate a wall.

In what way can one keep water away from the walls of a building? In order to make a wall watertight, one can eliminate all the openings from the wall. That is a traditional method of making walls watertight. Besides, it is necessary to build walls very carefully, sealing every opening, elimi­nating every small hole or crack. One can also eliminate or neutralize all the forces that can move water through the wall and make it penetrable. To these forces belong gravity, surface tension, capillary action, and air cur­rents.