floors

Question 1

Floors can be regarded as being composed of three

parts

Answer 1

(a) The actual loadbearing members;
(b) The upper surface or finish of the floor; and
(c) The lower surface of ceiling of the compartment
below.

Question 2

Timber floors will be found in many types of
building and, in most cases, are required to provide certain levels of fire resistance. What factors influence the level of fire protection

Answer 2

(a) Whether the flooring is plain edged (butted,
tongued and grooved) or is chipboard or plywood;
(b) The thickness of the flooring;
(c) The loadbearing capacity of the joists (and
the load imposed
(d) Ceiling beneath

Question 3

Timber joisted floors give concern to firefighters why

Answer 3

On the underside
of the joists is the ceiling usually, in modern work,
of building board with a thin coat of plaster. This
leaves a space between each joist enclosed by the
floorboards and ceiling which constitutes hazard
because fire can travel, undetected, in it. In the
case of a hearth fire, in particular, it is often necessary
to lift the floorboards at intervals to verify
that the fire is not travelling to some other part of
the structure.

Question 4

Name 4 ways that the joists are supported on the walls

which levers the wall out if joist collapses

Answer 4

Corbelled brick work
Splayed end joist in pocket
Joist carried on wooden wall plate
Bracket

joist on wooden wall plate levers
pocket will lever if the pocket is small

Question 5

Wooden floor joists supports. Which 3 methods are better. In order of best first

Answer 5

1.support the wall
plate on wrought-iron brackets built into the wall
2.corbel the brickwork
out to form a ledge for the wood wall plate
3.third is to reduce the thickness
of the wall by 114mm at each floor level and
to rest the wall plate on the ledge

Question 6

besides timber floors name other types of floor construction

Answer 6

pre stressed concrete
reinforced concrete
steel filler joists and concrete