Identify the type of the given trusses. Explain the difference between the Pratt and the Warren truss systems.

With your partner, discuss the main features of trusses and space frames. Use the following words and word combinations.

The assemblies of linear members; axial tension or compression; ties; three-dimensional; to be distributed in all directions; the true timber truss; wrought iron; space frames; the rib; to be aligned radially and circumferentially; the outer covering; to be regarded as; airframe structures; the most efficient use of material.

UNIT 7

Roofs

Text:Roofs

Grammar:

· Modal verbs and their equivalents (Синявская, p. 404 – 406)

· Word-forming suffix of nouns: -ing

New words:

1. attic [´ætık] чердак, мансарда

2. laying [´leııN] кладка

3. multangular [mAl´tæNgjulq] многоугольный

4. slope [slqVp] скат, наклон

5. waterproofing [´wO:tqpru:fıN] водонепроницаемый

6. flat roof [´flæt ru:f] плоская крыша

7. pitched roof [´pıtSt ru:f] скатная крыша

8. shed roof [Sed ru:f] односкатная крыша

9. gable roof [´geıbl ru:f] двускатная (щипцовая) крыша

10. hip roof [´hıp ru:f] четырехскатная (вальмовая) крыша

11. gambrel roof [´gæmbr(q)l ru:f] двускатная мансардная крыша

12. mansard roof [´mænsa:d ru:f] четырехскатная мансардная крыша

13. heat insulation теплоизоляция

14. atmospheric precipitates атмосферные осадки

Translate the following derived words according to the models.

Model: verb stem + ing ® noun

To build – строить ® building – здание

To cover – covering, to paint–painting

To plan – planning, to dwell – dwelling