Download - Timber framing code 2008: Floor Framing
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 Rule
Table
Size Comments
Timber Species______?______
Timber grade______________
Supplement #_____________
Roof Construction__________
Roof Covering_____________
Flooring system
General area______________
Timber species____________
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade_______?_______
Supplement #_____________
Roof Construction__________
Roof Covering_____________
Flooring system
General area______________
Timber species____________
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #______?_______
Roof Construction__________
Roof Covering_____________
Flooring system
General area______________
Timber species____________
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction_____?_____
Roof Covering_____________
Flooring system
General area______________
Timber species____________
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering______?_______
Flooring system
General area______________
Timber species____________
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area_______?_______
Timber species____________
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area: Structural strip
Timber species______?______
Grade___________________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area: Structural strip
Timber species: Radiata Pine
Grade_________?__________
Thickness________________
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area: Structural strip
Timber species: Radiata Pine
Grade: Utility
Thickness_________?_______
Flooring system
Wet areas________________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area: Structural strip
Timber species: Radiata Pine
Grade: Utility
Thickness: 19mm
Flooring system
Wet areas______?__________
Thickness________________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area: Structural strip
Timber species: Radiata Pine
Grade: Utility
Thickness: 19mm
Flooring system
Wet areas: CSR Structafloor
Thickness______?__________
Member Rule
Table
Size Comments
Timber Species: Hardwood
Timber grade: F11
Supplement #: 13
Roof Construction: Rafters
Roof Covering: Steel sheeting
Flooring system
General area: Structural strip
Timber species: Radiata Pine
Grade: Utility
Thickness: 19mm
Flooring system
Wet areas: CSR Structafloor
Thickness: 19mm
Flooring
Flooring Clause____?__
Table_________
Max joist spacing__________
Flooring
Flooring Clause 5.7
Table ?
Max joist spacing
Flooring
Flooring Clause 5.7
Table 5.3
(pg. 56)
Max joist spacing ?
Flooring
Flooring Clause 5.7
Table 5.3
Max joist spacing 510
Floor Joists
Floor
joists
Clause_?__
Table_____
Size
___x___
Span__________
Max Spacing____
Floor Joists
Floor
joists
Clause 4.3.2.1
Pg 49
Table ?
Size
Floor Joists
Floor
joists
Clause 4.3.2
Table 6
Size ?
Floor Joists
Floor
joists
Clause 4.3.2
Table 6
Size 100x50
Span?
Floor Joists
Floor
joists
Refer to Clause 4.3.2.3
(Pg 50)
For RLW
(also note ii)
Table 6
Size
100x50
Span 1600
Max 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
4.2.2
Table 6
Size
?
Wet Area floors
Floor joists
Clause
4.2.2
Table 6
Size
100 x 50
Material ?
Wet Area floors
Floor joists
Clause
4.2.2
Table 6
Size
100 x 50
CSR structafloor
Wet Area floors
Floor
joists
Clause
4.2.2
Table 6
Size
100 x 50
CSR structafloor
19mm thickness
450 joist spacing
1700 joist span