Vocabulary notes

cavity впадина; полость

coarse of brick ряд кирпича

gauged brick лекальный кирпич

EXERCISES

I. Read the following text and retell it keeping close to the text.

Partition walling

Partitions, as they are normally called, are internal walls usually built of the same materials as other types of walling previously described. When they are used simply as dividing walls and have only their own weight to carry, they are termed “non-load bearing” partitions. When, however, they are required to support the weight of the structure above, they are termed “load bearing” partitions.

“Non-load bearing” partitions are often built of light-weight materials, such as thin light-weight precast concrete blocks, hollow clay blocks and timber studding covered with either plasterboard, fiberboard, match-boarding, plywood, chipboard, resin bonded block-board or other form of cladding. The construction of a stud partition is used in a typical timber framed house. Where sound insulation is of the utmost importance, as in ordinary houses, even “non-load bearing” partitions should be built of bricks or dense precast blocks. Partitions of light-weight precast concrete blocks and hollow clay blocks have fire-resisting qualities and contribute to thermal insulation and are, therefore widely used.

Stud partitions, although commonly used in former years, are not so common nowadays, due to mainly to their low resistance against fire. On the other hand, they contribute quite a great deal to thermal insulation. Special partitions, for use in toilets etc., are often made of pressed steel, plastics, asbestos cement, tiles or glass. These are normally prefabricated and erected in sections and can be easily removed or re-arranged.

Piers are a particular form of walling, which is either completely isolated from the other walling or is attached there to. These are often constructed in brickwork, although they also occur in stonework and concrete block-work. Attached piers are intended to strengthen the walling, usually at those points where a load is being directly supported. Isolated piers, acting as columns, usually support the weight of a floor or beam between the walls of the main structure.

EXERCISES

I. Read the following text and note the interesting facts.

II. Find the Russian equivalents for the following words:

non-load, load-bearing, light-weight precast concrete, plaster board, fiberboard, match-boarding, plywood, chipboard, resin bonded block-board, dense precast block, hollow clay block, pressed steel, asbestos cement, tile, glass.

III. Answer the questions:

1. What is a partition?

2. What is the difference between “non-load bearing” and “load bearing” partitions?

3. What building materials are used for partitions?

4. What building materials are used for thermal insulation in stud partitions?

5. What is a pier?

6. What types of piers are mentioned in the text? Characterize them.

IV. Give a brief summary of the text.

The new look in buildings

Buildings have taken on a new look in the past decade. Metal and thin-wall back-up with more glass have completely changed the facades of the new buildings. The construction is more expensive than brick, and the large glass areas increase air conditioning costs. But people like the new look.

Until recently masonry was the principal material for the exteriors of buildings. Individual stones or bricks have been laid one on top of another to express the aesthetic conceptions of architects since prehistoric times. In recent years there has been some use of metal for window and door frames.

Before 1946 metal facades were used only to a very limited degree. In that year the Aluminum Company of America started a big research program to develop practical methods for the use of aluminum as a building facade material.

The three basic requirements for a metal-glass façade are:

a) light-weight,

b) ease-of-erection,

c) weather-tightness.

In 1948 most cities required a spandrel wall having a 4-hr. fire rating. An 8-in. brick wall would satisfy this requirement, but brick weighs 120 lb. per cu. ft. Since light-weight construction was important, a back-up wall 4 in. thick (either precast or poured) made of diacrete and cement was developed, weighing 20 lb. per sq. ft. compared to 80 lb. for an 8 in. brick wall. Light-weight construction, in many instances, brought savings in the structural frame as well as in building costs.

Ease of erection is important. In most cases, façades made of metal can and should be erected from the inside of the building, thus avoiding outside scaffolding. This item can create large savings in both time and money. Weather conditions become of little importance, and a minimum of time is lost. This contrasts with earlier operations which were practically brought to a stop by adverse weather conditions. Since metal frames are light, they can be handled easily by a few men without resort to expensive equipment.

Weather tightness is essential. Joints should be treated to shed water, and their number kept to a minimum. Generally they are located at expansion joints, at mullions, and at ceiling and floor levels. Today panels are mostly one story high and extended the full width between vertical mullions. Weather-tightness is generally attained by use of neoprene gaskets or calking compounds.

There should be no maintenance cost as far as metal-glass façade is concerned except window cleaning, which deserves consideration. Two methods are commonly used:

1) use of reversible in-swinging windows,

2) use of outside window-washing scaffolding, running up and down the facade, in which case mullions are designed to provide guides for the scaffolding and the glass in all windows can be fixed.

Close cooperation among the architect, engineer and contractor during the design is essential to achieve greatest economy. Materials, methods and budgets can be worked out for acceptable treatment of the facade. The architect, being an artist as well, will envisage certain shadow lines for his facade treatment and will justly insist that these be maintained. However, there are many ways to put the pieces together and still achieve the desired architectural features. Methods of assembly greatly influence cost.

Increased research by manufacturers is developing improved methods of shop handling and field erection that create savings in labor costs. Today there are many manufacturers in the business, and competition is healthful. The large selection available in design and color tends to create a greater desire for curtain-wall construction.