Timber framing code 2008: Floor Framing.

1. Timber framing code 2008: Floor Framing.

2. Specification: • Timber framed construction • Conventional timber framed roof • Roof pitch 22.50 • Roof covering steel roof decking, 10kg/m2 • Eaves width 600mm • Brick piers supporting bearers • Bearers 150 x 75 Unseasoned Hardwood, F11 • Joists 100 x 50 Unseasoned Hardwood, F11 • Fitted timber floors Utility grade 19mm T&G Radiata Pine • Wet area flooring 19mm CSR structafloor particleboard

3. Remember the following information: • Type of flooring determines the MAX SPACING of floor joists • SPAN of joists determines the SPACING of bearers • SPAN of bearers determines SPACING of piers

16. Flooring

17. Flooring

18. Flooring

19. Flooring

20. Floor Joists

21. Floor Joists

22. Floor Joists

23. Floor Joists

24. Floor Joists

25. Bearers, Clause 4.3.1 • The max span of 1600 for the floor joists will determine the max spacing of the bearers parallel to the building length. • Determine from the various tables the span for the given bearer size (150x75). • These spans determine the pier spacings

26. Bearers supporting load–bearing walls • RLW = Rafter span + overhang • Rafter run • = 7.470 / 2 • Rafter run= 3.735 • Rafter length = 3.735 / Cos 22.5o • Rafter length = 4.042 • Overhang =600 / Cos 22.5o • Overhang =0.649 • RLW = 4.042+0.649 = 2.670 2 • RLW = 2.7

27. FLW Bearers: load bearing walls • Table one of Supplement 13 • Say RLW of 4500 (2700 actual) • FLW = 1600/2 = 800 (based on max joist span) • Read max bearer span from table 1 for FLW 1200 • Allowable span for 150 x 75 = 1700

28. Bearers: floor loads only • Table 5, supplement 13 • FLW = ? (Based on max joist span) • FLW = 1600 • Go to Table 5 for FLW 1800 • Allowable span of bearer: 150x75 = 2100

29. Centreline spacing of brick piers • Supporting load bearing walls This is determined by the span of the bearer supporting load bearing walls • = span of bearer plus 230 (size of brick pier) • = 1700 + 230 • = 1930

30. Centreline spacing of brick piers • Supporting floor loads only This is determined by the span of the bearer supporting floor loads only. • Span of bearer plus 230 (size of brick pier) • = 2330

31. Wet Area floor joists

32. Wet Area floor joists

33. Wet Area floors

34. Wet Area floors

35. Wet Area floors

36. Wet Area floors