Timber framing code 2008:

Floor Framing.

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

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

Member RuleTable

Size CommentsTimber Species______?______Timber grade______________Supplement #_____________Roof Construction__________Roof Covering_____________Flooring systemGeneral area______________Timber species____________Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade_______?_______Supplement #_____________Roof Construction__________Roof Covering_____________Flooring systemGeneral area______________Timber species____________Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #______?_______Roof Construction__________Roof Covering_____________Flooring systemGeneral area______________Timber species____________Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction_____?_____Roof Covering_____________Flooring systemGeneral area______________Timber species____________Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering______?_______Flooring systemGeneral area______________Timber species____________Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area_______?_______Timber species____________Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area: Structural stripTimber species______?______Grade___________________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area: Structural stripTimber species: Radiata PineGrade_________?__________Thickness________________Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area: Structural stripTimber species: Radiata PineGrade: UtilityThickness_________?_______Flooring systemWet areas________________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area: Structural stripTimber species: Radiata PineGrade: UtilityThickness: 19mmFlooring systemWet areas______?__________Thickness________________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area: Structural stripTimber species: Radiata PineGrade: UtilityThickness: 19mmFlooring systemWet areas: CSR StructafloorThickness______?__________

Member RuleTable

Size CommentsTimber Species: HardwoodTimber grade: F11Supplement #: 13Roof Construction: RaftersRoof Covering: Steel sheetingFlooring systemGeneral area: Structural stripTimber species: Radiata PineGrade: UtilityThickness: 19mmFlooring systemWet areas: CSR StructafloorThickness: 19mm

Flooring

Flooring Clause____?__Table_________

Max joist spacing__________

Flooring

Flooring Clause 5.7Table ?

Max joist spacing

FlooringFlooring Clause 5.7

Table 5.3(pg. 56)

Max joist spacing ?

FlooringFlooring Clause 5.7

Table 5.3Max joist spacing 510

Floor Joists

Floorjoists

Clause_?__Table_____

Size___x___

Span__________Max Spacing____

Floor Joists

Floorjoists

Clause 4.3.2.1Pg 49Table ?

Size

Floor JoistsFloorjoists

Clause 4.3.2Table 6

Size ?

Floor JoistsFloorjoists

Clause 4.3.2Table 6

Size 100x50

Span?

Floor Joists

Floorjoists

Refer to Clause 4.3.2.3(Pg 50)For RLW(also note ii)Table 6

Size 100x50

Span 1600Max spacing 600mm*Note that joists will actually be spaced at 510 because of flooring.

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

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

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

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

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

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

Wet Area floor joists

Floor joists

Clause___?_

Table_____

Size__x__

Material_____________

Thickness___________

Joist spacing_________

Joist span___________

Wet Area floor joists

Floor joists Clause 4.2.2 Table ?

Wet Area floors

Floor joists Clause 4.2.2Table 6

Size?

Wet Area floors

Floor joists

Clause 4.2.2Table 6

Size100 x 50

Material ?

Wet Area floors

Floor joists

Clause 4.2.2Table 6

Size100 x 50

CSR structafloor

Wet Area floors

Floor joists

Clause 4.2.2Table 6

Size100 x 50

CSR structafloor 19mm thickness 450 joist spacing 1700 joist span