Essentials of Fire Fighting[消防要点](PPT-120).ppt

Essentials of Fire Fighting,
5th Edition
Chapter 11 — Ventilation
Firefighter I
Firefighter I
11–1
Chapter 11 Lesson Goal
pleting this lesson, the student shall be able to identify reasons and needs for various types of ventilation within a structure, distinguish which types of ventilation are most effective to varying situations, and perform duties related to ventilating a structure following the policies and procedures set forth by the authority having jurisdiction (AHJ).
Firefighter I
11–2
Specific Objectives
1. Describe reasons for fireground ventilation.
2. List considerations that affect the decision to ventilate.
3. Discuss factors that are taken into account when deciding the need for ventilation.
(Continued)
Firefighter I
11–3
Specific Objectives
4. Discuss vertical ventilation.
5. List safety precautions to observe when undertaking vertical ventilation.
6. List warning signs of an unsafe roof condition.
(Continued)
Firefighter I
11–4
Specific Objectives
7. Discuss roof coverings and using existing roof openings for vertical ventilation purposes.
8. Discuss ventilation considerations for various types of roofs.
9. Describe trench or strip ventilation.
(Continued)
Firefighter I
11–5
Specific Objectives
10. Explain procedures for ventilation of a conventional basement.
11. List factors that can reduce the effectiveness of vertical ventilation.
12. Discuss horizontal ventilation.
(Continued)
Firefighter I
11–6
Specific Objectives
13. Discuss considerations for horizontal ventilation.
14. Distinguish between advantages and disadvantages of forced ventilation.
15. Discuss negative-pressure ventilation.
(Continued)
Firefighter I
11–7
Specific Objectives
16. Discuss positive-pressure ventilation.
17. Compare and contrast positive-pressure and negative-pressure ventilation.
18. Describe hydraulic ventilation.
(Continued)
Firefighter I
11–8
Specific Objectives
19. List disadvantages to the use of hydraul