Ответьте на вопросы к тексту.

1. What does the more extensive use of steel in multi-storey buildings result from?

2. How can a longer useful life of a building be obtained?

3. How many degrees of flexibility are there?

4. What do they depend on?

5. How can the modification of the floor space be altered with the first degree of flexibility?

6. What is its difference from the second degree of flexibility?

7. Why must partitions be non-loadbearing in case of the second degree of flexibility?

8. What does the third degree of flexibility involve?

9. Which elements of a structure can be re-used for other purposes and in combination with other structures with the fourth degree of flexibility?

10. What does the fifth degree of flexibility mean?

Лексическое упражнение

В списке А даны некоторые слова и выражения, которые использованы в тексте для домашнего чтения. Найдите их перевод в списке В.

Урок 2.9 Фонетическое задание

Прочитайте транскрипцию в списке A, соотнесите её с соответствующим словом из списка B и переведите слово на русский язык. Учтите, что не все слова списка В даны в списке А.

A

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B

Текст A

STAIRCASES

Stairs are used for vertical circulation in buildings. A distinction must be made between fixed stairs and escalators. Ramps and, as well as lifts, may perform similar functions.

Depending on the space available, or the architectural requirements, stairs may be straight, curved or spiral on plan. The most frequent type, especially in buildings designed for construction by mass production techniques, is the staircase with straight flights.

In the design of stairs the following problems should be paid particular attention to: the geometry of the staircase; the construction of its components; the vertical enclosure of the staircase in relation to the storeys and to the rest of the building generally.

The fixed straight staircase comprises flights and landings. A series of more than three steps is a flight. For reasons of safety the length of a flight should be limited to about 18 steps. It is rarely that two floors in a multi-storey building are connected by a single flight of stairs. If two or more flights are installed in each storey, one or more intermediate landings, as well as top and bottom landings, will be needed. If the successive flights are at right angles to one another the landing at each change of direction is known as a quarter-space landing. With two flights per storey, this is the most common form of construction and takes up the least space on plan.

Construction of the steps

The convenience and safety of stairs very much depend on the relationship between the tread and the riser. Standardised tread and riser dimensions make planning easier and enable the related features such as hand-rails to be produced to uniform dimensions. The depth of the landing and the length of the flight should be a dimension which can be divided by 60 or, if this is not possible, by 30 or, in an extreme case, by 10.

Notes:

convenience удобство

geometry n. геометрическая форма

hand-rail n. перила

landing n. лестничная площадка

quarter-space landing промежуточная лестничная площадка

riser n. подступёнок

tread n. проступь, ступень