Timber floor

1. TIMBER FLOORING Asst. Prof Amruta Khairnar VPSOA

2. Types of floors Timber floor C omposite floor 1. 2 .

3. Timber flooring Basement or Ground floor of timber. Single Joist timber beam. Double Joist timber beam. Framed triple joist timber floor.

4. Basement / ground floor of timber Auditorium – dances and dramas. G.L. wall D.P.C. F.L. Floor Boards Bridging joists Sleeper wall Wall plates 10 to 15 mm Cement course 1.2 to 1.8m Filling of selected earth 1

5. 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.

6. 2 Single joist timber floors Span (below 3m) c a b Joist PLAN Strutting

7. Detail at c’ Wall Wall plate Ceiling Floor boards Joist Air space

8. Section on ab 300 – 400 mm Floor boards Herring bone strutting Wedges J oist

9. Double joist timber floors 3 Bridging joist @ 300 mm c/c 1.8m to 2.4m Binders PLAN 300mm 3.6 to 7.5m

10. Methods of fixing binders with joists Binders Cogged Joint Fillet Floor boards Notched joint Bridging Joist Bridging Joist

11. 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

12. Framed or triple joist timber floors 4 Binders Girders PLAN More than 7.5m Bridging joist 3m

13. Girders Details of framed timber floors Binder Binder Floor boards Furring piece Bridging joists Ceiling Tusk and tenon joint Ceiling joist

14. Single joist Double joist Triple joist (framed) Bridging joist 1.8m to 2.4m Binders 3.6 to 7.5m Binder Girder More than 7.5m Bridging joist Joist Strutting Below 3 m

15. Floor boards : @ top of the bridging joist Width : 100 – 200mm Thk : 20 – 40mm When subjected to heavy traffic - thk : 60- 80mm P ugging: 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

16. Source : BORDERS UNDERFLOOR HEATING