Post on 06-Feb-2015
description
TIMBER FLOORINGAsst. Prof Amruta Khairnar
VPSOA
Types of fl oors
Timber floor Composite floor
1. 2.
Timber fl ooring
• Basement or Ground floor of timber.
• Single Joist timber beam.
• Double Joist timber beam.
• Framed triple joist timber floor.
Basement / ground fl oor of t imber
Auditorium – dances and dramas.
G.L.
wall
D.P.C.F.L.
Floor BoardsBridging joists
Sleeper wall
Wall plates
10 to 15 mm Cement course
1.2 to 1.8m
Filling of selected earth
1
Precautions
• Soil below timber floor – covered with PCC 1:2:4 (100 to
150 mm thk).
• DPC – exterior wall + top of the sleeper wall.
• Well seasoned timber is used.
• Hollow space between bottom of concrete and floor level is
filled up with selected earth.
2Single joist timber fl oorsSpan (
belo
w 3
m)
c
a b
Joist
PLAN
Strutting
Detail at c’
Wall
Wall plate Ceiling
Floor boards
Joist
Air space
Section on ab
300 – 400 mm
Floor boards
Herring bone strutting
Wedges Joist
Double joist timber fl oors 3
Bridging joist @ 300 mm c/c
1.8m to 2.4m
Binders
PLAN
300mm
3.6
to 7
.5m
Methods of fi xing binders with joists
Binders Cogged Joint
Fillet
Floor boards
Notched joint
Bridging Joist Bridging Joist
Disadvantages
The weight of the floor is
thrown on the few points
on the wall.
Depth of the floor is increased by
use of binders and accordingly,
the height of the room is
decreased.
Bridging Joist
Binders
Framed or t r ip le jo ist t imber fl oors 4
Binders
Girders
PLAN
More
than 7
.5m
Bridging joist
3m
Girders
Deta i ls o f f ramed t imber fl oors
Binder Binder
Floor boards
Furring piece Bridging joists
Ceiling Tusk and tenon joint
Ceiling joist
Single joist Double joist Triple joist (framed)
Brid
gin
g
joist
1.8
m to
2.4
m
Bin
ders
3.6 to 7.5mB
inder
Gird
er
More than 7.5m
Brid
gin
g
joist
Jois
t
Str
utt
ing
Below 3 m
Floor boards :
• @ top of the bridging joist• Width : 100 – 200mm• Thk : 20 – 40mm• When subjected to heavy
traffic - thk: 60- 80mm
Pugging:
• In order to make timber floor sound proof.
• Pugging plaster – mixture of chopped straw & mortar.
• Insulated boards are supported on fillets.
Floor ceiling :
• Underside of the floor, improve appearance.
• Plaster boards, asbestos cement sheets.• Rest on the bridging joists / binders.
Bridging joists
Fillets Insulating boards
Source : BORDERS UNDERFLOOR HEATING