timber 2 Flashcards
1
Q
advantages of timber in fire compared to other materials?
A
Maintains its strength
2
Q
Disadvantages of timber exposed to fire?
A
- flammable
- contributes to spread of fire
- releases heat
3
Q
What is pyrolysis?
A
combustion process
4
Q
What are the three zones in the flow diagram when heat input on timber?
A
- unaffected timber
- Pyrolysis zone
- Char zone
5
Q
How is timber protected from fire?
A
cladding
intumescent paints
flame retarders
6
Q
how does flame retarders work?
A
change decomposition….reduce temp… increasing thickness of char
7
Q
types of cladding for timber protection?
A
timber panels
rock fibre batts
gypsum plasterboard
