glass

Question 1

disadvantages of gass

Answer 1

Radiating heat travels thru
little fire resistance
shatters early in a fire

Question 2

there are three types of glass now available

which offer some degree of fire resistance

Answer 2

wired glass
toughened glass
laminated glass

Question 3

toughened glass ?

Answer 3

achieve the same integrity and stability as the wired
glass without the unattractive appearance of the
wires, yet these also fail to provide any insulation

Question 4

wired glass ?

Answer 4

solve the
problem of stability and integrity by holding the
glass in place, but this still does not offer any insulation
and radiant heat can still pass through the
material.

Question 5

Laminated glass

Answer 5

incorporate a completely translucent and transparent
intumescent layer, which, on the application of
heat expands to form an insulating barrier. These
glass products have the ability therefore, to resist
fire radiation transmission, by becoming opaque
when subjected to heat above 120” Celsius

Question 6

There are basically two types of glass which are

considered non-insulating

Answer 6

wired

special composite

Question 7

describe how wired glass reacts in a fire

Answer 7

Wired glass will crack very early in a fire but
the steel mesh sandwiched in the centre of the
glass holds it together if it has been broken by
impact or by thermal shock. Because the
integrity and stability are retained in a fire, the
spread of smoke and flame is prevented even
though the glass may be badly damaged

Question 8

describe how special composition glass reacts in a fire

Answer 8

on exposure to
fire, the glass does not break owing to its low
coefficient of thermal expansion, and hence
remains unbroken within its frame. The glass
may also be thermally strengthened to minimise
the effects of stress, thereby achieving a
level of impact safety

Question 9

glass types which are able to resist the
passage of smoke, flames and hot gases and meet
the insulating criterion for at least 30 minutes.
National regulations generally require 30, 45 and
60 minutes compliance.are

Answer 9

intumescent laminated
gel interlayed glass formed from a
clear, transparent gel located between sheet

Question 10

what is also important with glass and fire situations

Answer 10

Glass by itself is not fire resisting. The level of fire
resistance achieved is that of the system - glass,
beads, glazing materials, frame and frame restraint
detail. The whole system is only as strong as its
weakest component.