Timber Wall Framing Class Exercise 1

Reference Material A.S. 1684.2 (2006) Non Cyclonic

Details: Floor Plan – Same as Roofing Class Exercise 1 Brick Veneer Construction Roof Pitch 300 Sheet Roofing 10Kg/m2 Eaves Width 450mm Floor to Ceiling Height 2.700m Wall Framing – Seasoned Softwood MGP 15 Concrete Raft Floor Slab Wind Classification – N3

Wall Frame. (Supporting Conventional Roof Framing) Determine the most economical size, span & spacing of the following members Bottom Wall plate – not trenched. Top Wall plate – not trenched (to support rafters @ 1200mm c/c) Common Studs at 600mm c/c (not notched for erection bracing) Noggings Jamb Studs (studs at sides of openings) Lintels Eaves Beams

Roofing Class Exercise 1 Floor Plan Same as Roofing Class Exercise 1

Use preliminary calcs from roofing ex. 1: Rafter Span = 2.098 Say 2.100 RLW Underpurlin = 2.1 Eaves Overhang = 0.693 Distance X = 1.728 Half spread of the fan strut = 1.211 Full spread of the fan strut = 2.422 Length of strut = 1.713

For roof mass use Table B1.1 p.219 1. Fill in General Information from Prelim. Calcs & Specification Member Rule / Table Size Comments Timber Species Timber Grade Supplement Number Roof Mass Table Type of Const. Floor / Ceiling Height Eaves RLW RLW S/softwood MGP 15 6 - N3 10Kg/m B1.1 For roof mass use Table B1.1 p.219

Table B1.1 Page 217 10kg/m2

For roof mass use Table B1.1 p.219 1. Fill in General Information from Prelim. Calcs & Specification Member Rule / Table Size Comments Timber Species Timber Grade Supplement Number Roof Mass Table Type of Const. Floor / Ceiling Height Eaves RLW RLW S/softwood MGP 15 6 - N3 10Kg/m B1.1 Brick veneer 2.700m For roof mass use Table B1.1 p.219 Check Preliminary Calcs for rafter RLW & Eaves RLW

Calculate Eaves Overhang – Eaves RLW TL O/Hang = 0.450 + 0.150 COS 30 = 0.693m 0.693m RLW Eaves = 0.693m 0.150 0.450

Eaves RLW from preliminary calcs. = 0.693m Member Rule / Table Size Comments Timber Species Timber Grade Supplement Number Roof Mass Table Type of Const. Floor / Ceiling Height Eaves RLW RLW S/softwood MGP 15 6 - N3 10Kg/m B1.1 Brick veneer 2.700m 0.693m Eaves RLW from preliminary calcs. = 0.693m

RLW on external wall will be Span of rafter plus overhang Refer to page 27 of your standard 2.098 + .693 = 2.791 Say 2.800

B1.1 Brick veneer 2.700m .693m 2.800m Member Rule / Table Size Comments Timber Species Timber Grade Supplement Number Roof Mass Table Type of Const. Floor / Ceiling Height Eaves RLW RLW S/softwood MGP 15 6 - N3 10Kg/m B1.1 Brick veneer 2.700m .693m 2.800m

Fill in Comments Column 2. Find information for Common Studs (rules & supp. Table) Member Rule / Table Size Comments Common Studs R T Stud Height Stud Centers Studs Notched Rafter Spacing 2.700 6.2.1.2 0.600 90 x 35 6.3.2.1 Not notched 1.200m 7 Fill in Comments Column Refer page 59, rule 6.2.1.2 (Building Practice) Common Studs. Refer page 66, rule 6.3.2.1 (Member Sizes) Common Studs. Refer Supp. 6, Table 7 Common Studs – Single Storey not notched, 600mm c/c, sheet roof, 2.700m height, 1.200m rafter spacing, RLW of 2.100 min. Select stud size - 90 x 35 (from table 7)

Refer page 62, rule 6.2.1.5 (Building Practice) Noggings. 3. Find information for Noggings (rules & supp. Table) Member Rule / Table Size Comments Noggings R Spacing 6.2.1.5 Refer page 62, rule 6.2.1.5 (Building Practice) Noggings. Check spacing requirements

Wall studs shall have continuous rows of noggings at 1350 mm maximum centres (see Figure 6.6). Noggings are not required to be stress graded. Nogging thickness shall be a minimum of 25 mm and shall be suitable for the proper fixing of cladding and linings. Noggings shall be installed either centrally in the depth of the studs or flush with one face of the stud in order to provide fixing or support to cladding or linings. Stagger in the row of noggings shall not be greater than twice the nogging breadth.

FIGURE  6.6   NOGGING

Refer page 62, rule 6.2.1.5 (Building Practice) Noggings. 3. Find information for Noggings (rules & supp. Table) Member Rule / Table Size Comments Noggings R Spacing 1.350m 6.2.1.5 90 x 35 Refer page 62, rule 6.2.1.5 (Building Practice) Noggings. Check spacing requirements Spacing of noggings = 1.350m max. Size for Noggings = same as for common studs, 70 x 35

Find information for Studs at sides of Openings (Rules & Supp. Table No.) Member Rule / Table Size Comments Studs at sides of openings R T Window/Door Opening Width W9 Bedroom 1 W1 Bedroom 2 W8 Bedroom 3 W2 Bath & WC W3 Laundry W4 Kitchen W5 Dining W6 Living W7 Family D2 Entry D1 Kitchen 6.2.1.2 6.3.2.3 11 Refer page 59, rule 6.2.1.2 (Building Practice) Common Studs. Refer page 68, rule 6.3.2.3 (Member sizes) Jamb Studs. Refer Supp. 6, Table 11 Jamb Studs – Sheet Roof Refer to window schedule for Opening Widths

Window Schedule: Window H x W W9 Bedroom 1 1.550 1.800 W2 Bath & WC .900 1.800 W3 Laundry .900 1.350 W4 Kitchen .900 1.650 W5 Dining 1.550 1.200 W6 Living 1.650 1.850 W7 Family 1.650 1.850 D2 Entry 2.060 1.350 D1 Kitchen 2.060 .900

Fill in Opening Width information Member Rule / Table Size Comments Studs at sides of openings R T Window/Door Opening Width W9 Bedroom 1 W1 Bedroom 2 W8 Bedroom 3 W2 Bath & WC W3 Laundry W4 Kitchen W5 Dining W6 Living W7 Family D2 Entry D1 Kitchen 6.2.1.2 1.800 1.200 6.3.2.3 1.200 1.800 11 1.350 1.650 1.200 1.850 1.850 1.350 0.900 Refer page 59, rule 6.2.1.2 (Building Practice) Common Studs. Refer page 68, rule 6.3.2.3 (Member sizes) Jamb Studs. Refer Supp. 6, Table 11 Jamb Studs – Sheet Roof Refer to window schedule for Opening Widths Fill in Opening Width information Go to Table 11 of supplements to size studs to suit opening widths

Note that the minimum bearing length according to note 5 is 35mm Remember the fine print from table 17, lintels Note that the minimum bearing length according to note 5 is 35mm

This shows us that 2/90 x 35 jamb studs will support a max width of opening up to 4500 for a tin roof (and pretty much the same for a tile roof)

Window 9 – studs at sides of openings = 2 / 90 x 35 Member Rule / Table Size Comments Studs at sides of openings R T Window/Door Opening Width W9 Bedroom 1 W1 Bedroom 2 W8 Bedroom 3 W2 Bath & WC W3 Laundry W4 Kitchen W5 Dining W6 Living W7 Family D2 Entry D1 Kitchen 6.2.1.2 2/90 x35 1.800 2/90 x35 1.200 6.3.2.3 2/90 x35 1.200 2/90 x35 1.800 11 2/90 x35 1.350 2/90 x35 1.650 2/90 x35 1.200 2/90 x35 1.850 2/90 x35 1.850 2/90 x35 1.350 90 x 35 0.900 Window 9 – studs at sides of openings = 2 / 90 x 35 Fill in remaining stud information using Table 11. Next – Size Top & Bottom Plates

5. Find information for Top Plates (Rules & Supp. Table No.) Member Rule / Table Size Comments Top Plates R T Top Plate RLW Tie Down Spacing 6.2.2.1 Single storey sheet roof 6.3.4 2.800m 15 1.200m Fill in Comments Column Refer page 62, rule 6.2.2.1 (Building Practice) Plates General. Refer page 73, rule 6.3.4 (Member Sizes) Top Plates. Refer Supp. 6, Table 15 Top Plates (Sheet Roof – Single or Upper Storey). Check Table 15 for size of Top Plates

Top Plate Size = 35 x 90 RLW = 2.800m Rafter Spacing = 1.200m Tie Down Spacing = 1.200 Stud spacing = 0.600 RLW = 2.800m Top Plate Size = 35 x 90 35 x 70

5. Find information for Top Plates (Rules & Supp. Table No.) Member Rule / Table Size Comments Top Plates R T Top Plate RLW Tie Down Spacing 6.2.2.1 Single storey sheet roof 6.3.4 35 x 90 2.800m 15 1.200m Fill in Comments Column Refer page 62, rule 6.2.2.1 (Building Practice) Plates General. Refer page 73, rule 6.3.4 (Member Sizes) Top Plates. Refer Supp. 6, Table 15 Top Plates (Sheet Roof – Single or Upper Storey). Check Table 15 for size of Top Plates Enter Size for Top Plates

6. Find information for Bottom Plates (Rules & Supp. Table No.) Member Rule / Table Size Comments Bottom Plates R T Bottom Plate RLW Rafter Spacing 6.2.2.2 Single storey sheet roof 6.3.3 2.800m 14 1.200m Fill in Comments Column Refer page 62, rule 6.2.2.2 (Building Practice) Bottom Plates. Refer page 72, rule 6.3.3 (Member Sizes) Bottom Plates. Refer Supp. 6, Table 14 Bottom Plates (Sheet Roof – Single or Upper Storey). Check Table 14 for size of Bottom Plates.

Use 35 x 90 Bottom Plates Check Note 2 – Table 14 For plate thickness if Walls are on Concrete Slabs.

6. Find information for Bottom Plates (Rules & Supp. Table No.) Member Rule / Table Size Comments Bottom Plates R T Bottom Plate RLW Rafter Spacing 6.2.2.2 Single storey sheet roof 35 x 90 6.3.3 2.800m 14 1.200m Fill in Comments Column Refer page 62, rule 6.2.2.2 (Building Practice) Bottom Plates. Refer page 72, rule 6.3.3 (Member Sizes) Bottom Plates. Check Table 14 for size of Bottom Plates. Enter Size for Bottom Plates

7. Find information for Lintels (Rules & Supp. Table No.) Member Rule / Table Size Comments Lintels R T Window/Door Opening Width W9 Bedroom 1 W1 Bedroom 2 W8 Bedroom 3 W2 Bath & WC W3 Laundry W4 Kitchen W5 Dining W6 Living W7 Family D2 Entry D1 Kitchen 6.2.3 1.800 6.3.6 1.200 1.200 17 1.800 1.350 1.650 1.200 1.850 1.850 1.350 0.900 Fill in Opening Width information Refer page 63, rule 6.2.3 (Building Practice) Openings. Refer page 75, rule 6.3.6 (Member Sizes) Lintels. Refer Supp. 6, Table 17 Lintels (Sheet Roof – Single or Upper Storey). Go to Table 17 to Size Lintels to suit opening widths.

RLW = 2.800m Rafter spacing = 1.200m Use column for Max. Lintel Span

W9 Bedroom 1 Lintel span = 1.800 Lintel Size for W9 = 120 x 35 NOTE: 120 x 35 Lintel is used because it is the most cost effective, as opposed to using 2/90 x 35. Size remaining Lintels

Enter Lintel size for W9 Bedroom 1 (120 x 35). Member Rule / Table Size Comments Lintels R T Window/Door Opening Width W9 Bedroom 1 W1 Bedroom 2 W8 Bedroom 3 W2 Bath & WC W3 Laundry W4 Kitchen W5 Dining W6 Living W7 Family D2 Entry D1 Kitchen 6.2.3 120 x 35 1.800 6.3.6 90 x 35 1.200 90 x 35 1.200 17 120 x 35 1.800 90 x 35 1.350 90 x 45 1.650 90 x 35 1.200 120 x 35 1.850 120 x 35 1.850 90 x 35 1.350 35 x 90 0.900 Fill in Opening Width information Refer page 63, rule 6.2.3 (Building Practice) Openings. Refer page 75, rule 6.3.6 (Member Sizes) Lintels. Refer Supp. 6, Table 17 Lintels (Sheet Roof – Single or Upper Storey). Enter Lintel size for W9 Bedroom 1 (120 x 35). Complete entering remaining Lintel sizes

8. Find information for Eaves Beams (Rules & Supp. Table No.) Member Rule / Table Size Comments Eaves Beams R T Location Span RLW Porch (Front entry) 2.100 1.800 Fill in Comments Column – (refer to plan for porch span)

Entrance Span = 1.800 Single Span Member (Eaves or Verandah Beam)

8. Find information for Eaves Beams (Rules & Supp. Table No.) Member Rule / Table Size Comments Eaves Beams R T Location Span RLW Front entry 6.3.7 2.800 6.3.6 1.800 17 Find: Rule 6.3.7, page 78, Verandah Beams (Plates) 6.3.7 Verandah beams (plates) The size of verandah beams shall be determined from Span Tables 51A of the Supplements for single span and continuous spans respectively. The ends of beams, which are supported on stud walls, shall be carried by jamb studs (with beams considered as lintels) or posts. Refer page 75, rule 6.3.6 (Member Sizes) Lintels. Refer Supp. 6, Table 17 Lintels (Sheet Roof – Single or Upper Storey). Go to Table 17 to Size Lintels to suit opening widths.

RLW = 2.800 Rafter Spacing = 1.200 Beam Span = 1.800 Beam Size = 120 x 35

8. Find information for Eaves Beams (Rules & Supp. Table No.) Member Rule / Table Size Comments Eaves Beams R T Location Span RLW Front entry 6.3.7 120 x 35 2.800 6.3.6 1.800 17 Find: Rule 6.3.7, page 78, Verandah Beams (Plates) 6.3.7 Verandah beams (plates) The size of verandah beams shall be determined from Span Tables 51A of the Supplements for single span and continuous spans respectively. The ends of beams, which are supported on stud walls, shall be carried by jamb studs (with beams considered as lintels) or posts. Refer page 75, rule 6.3.6 (Member Sizes) Lintels. Refer Supp. 6, Table 17 Lintels (Sheet Roof – Single or Upper Storey). Go to Table 17 to Size Lintels to suit opening widths. Enter Size from table 17 = 120 x 35

Exercise 1 – Wall Framing Complete