Conventional Roof Framing Class Exercise 1 - 30 0 Residential Studies Certificate IV 2182D
Conventional Roof Framing Class Exercise 1 - 30 0 Residential Studies Certificate IV 2182D
Mar 13, 2016
Conventional Roof Framing Class Exercise 1 - 30 0 Residential Studies Certificate IV 2182D. Using the Floor Plan & Details provided complete the Preliminary Calculations so that the most economical Size, Span and Spacing Of the Ceiling and Roof members can be achieved. - PowerPoint PPT Presentation
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Conventional Roof Framing
Class Exercise 1 - 300
Residential Studies Certificate IV2182D
Using the Floor Plan & Details provided
complete the Preliminary Calculations
so that the most economical Size, Span and Spacing
Of the Ceiling and Roof members can be achieved.
0.450 3.500 0.090 2.4000.090
1.8000.090
6.430 0.240
14.640
1.500
0.240
3.500 0.0
900.9
100.0
902.500
0.240
0.240
3.500
0.090
2.400
0.240
0.450 2.5000.0902.500
0.090 0.090 0.0903.690 0.240
3.500
0.450
0.240
7.57
0
1.800 3.540
Bed 2
W1 W2 W3 D1 W4 W5
W6W7W8W9
Bed 1 Bed 3Entry
Family
Living
DiningKitchenL'dryBath &
W.C.
Direction of Ceiling Joists
Chan
ge in
di
rectio
n of
Ceili
ng
Joists
John BridgesAugust 2004NTS
D2
D3D4D5
D6
D7 D8
Note: Hyspan LVL Strutting Beams to Living/Family & Living/Dining rooms as shown
0.450 3.500 0.090 2.4000.090
1.8000.090
6.430 0.240
14.640
1.500
0.240
3.500 0.0
900.9
100.0
902.500
0.240
0.240
3.500
0.090
2.400
0.240
0.450 2.5000.0902.500
0.090 0.090 0.0903.690 0.240
3.500
0.450
0.240
7.57
0
1.800 3.540
Bed 2
W1 W2 W3 D1 W4 W5
W6W7W8W9
Bed 1 Bed 3Entry
Family
Living
DiningKitchenL'dryBath &
W.C.
Direction of Ceiling Joists
Chan
ge in
dir
ection
of
Ceili
ng
Joists
John BridgesAugust 2004NTS
D2
D3D4D5
D6
D7 D8
Floor Plan Class Exercise 1
Preliminary CalculationsCommon Rafter
True Length of Common Rafter Pitch 300
300
Half Span 3.635
Rise 2.099
Half Span = 7.570 – 0.150 2= 3.635m
Rise = 30 Tan x 3.635 = 2.099m
TLCR = 4.197
TLCR = 3.635 30cos
= 4.197m
Calculate Common Rafter Span - RLW
4.197
RLW = 4.197 2
= 2.098m
2.098
2.098
RLW = 2.098m Say 2.100m
Calculate Eaves Overhang – Eaves RLW
0.150 0.450
TL O/Hang = 0.450 + 0.150 COS 30
= 0.693m
0.693m
RLW Eaves = 0.693m
Calculate Fan Struts
2.098
2.098
0.693
Strut =
2.1
Strut = Tan30 x 2.098 = 1.211
1.211Strut
Calculate Fan Strut Length
1.211
1.211 1.211
Fan Strut = 1.2112 + 1.2112
= 1.713m
or
= 1.211 cos 45
= 1.713m
1.713 1.713
Half Spread Fan Strut = 1.211m
Fan Strut Length = 1.713m
Calculate Distance X.
2.098
2.098
0.693
Distance X is the distanceFrom the inside of the plate to the centre of the underpurlin.
The Formula is Run of rafter divided by 2 minus the width of the wall plate
Run of rafter = 3.635
3.635 / 2 = 1.818
1.818 – 90 = 1728
Summary:
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
Using the information from the Preliminary Calculations&
The Job Specification
Fill in the Project job sheets to arrive at final design requirements.
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Fill in comments column with information from project specification
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
MGP 15
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
MGP 15
6 – N3
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
MGP 15
6 – N3
10Kg/m2
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
MGP 15
6 – N3
10Kg/m2
Conventional
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
MGP 15
6 – N3
10Kg/m2
Conventional
2.700
General Information from Project Details
Member Rule/Table Size CommentsTimber Species
Timber Grade
Supp. No.
Roof Mass
Type/Construct.
Floor to Ceiling height
Eaves Width
Seasoned S/Wood
Fill in comments column with information from project specification
MGP 15
6 – N3
10Kg/m2
Conventional
2.700
0.450
General Information from Project Details
Using A.S. 1684.2 (2006) – Section 7 Roof Framing
1. Obtain information for Ceiling Joists to complete job sheet.
Member Rule/Table Size Comments
Ceiling Joists R
T
R
90 x 35
Single Span
Continuous Span (over more than 1 span)
1. Page 81 – rule 7.2.4 ceiling joists (building practice)
7.2.4
2. Page 98 – rule 7.3.6 ceiling joists (member sizes)
7.3.6
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
Using A.S. 1684.2 (2006) – Section 7 Roof Framing
1. Obtain information for Ceiling Joists to complete job sheet.
Member Rule/Table Size Comments
Ceiling Joists R
T
R
90 x 351200c/c
Single Span
Continuous Span (over more than 1 span)
1. Page 81 – rule 7.2.4 ceiling joists (building practice)
7.2.4
2. Page 98 – rule 7.3.6 ceiling joists (member sizes)
7.3.6
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
21
4. Find allowable spans for 90 x 35 MGP15 ceiling joists from table 21 supp. 6
Using A.S. 1684.2 (2006) – Section 7 Roof Framing
1. Obtain information for Ceiling Joists to complete job sheet.
Member Rule/Table Size Comments
Ceiling Joists R
T
R
90 x 351200c/c
Single Span
Continuous Span (over more than 1 span)
1. Page 81 – rule 7.2.4 ceiling joists (building practice)
7.2.4
2. Page 98 – rule 7.3.6 ceiling joists (member sizes)
7.3.6
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
21
4. Find allowable spans for 90 x 35 MGP15 ceiling joists from table 21 supp. 6
2.400
Using A.S. 1684.2 (2006) – Section 7 Roof Framing
1. Obtain information for Ceiling Joists to complete job sheet.
Member Rule/Table Size Comments
Ceiling Joists R
T
R
90 x 351200c/c
Single Span
Continuous Span (over more than 1 span)
1. Page 81 – rule 7.2.4 ceiling joists (building practice)
7.2.4
2. Page 98 – rule 7.3.6 ceiling joists (member sizes)
7.3.6
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
21
4. Find allowable spans for 90 x 35 MGP15 ceiling joists from table 21 supp. 6
2.400
2.800
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35 Bedroom 1Bedroom 2Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35 Bedroom 1Bedroom 2 3.500 1.250Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WCLaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundryKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchenDiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750DiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750DiningFamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750FamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750FamilyLivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750LivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750LivingEntry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750Living 3.690 1.750Entry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35140 x 35
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750Living 3.690 1.750Entry
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
2. Obtain information for Hanging Beams
Member Rule/Table Size CommentsRoom Span CLW
Hanging Beams R
T
R
140 x 35140 x 35 90 x 35________________140 x 35140 x 35120 x 35140 x 35________
Bedroom 1Bedroom 2 3.500 1.250Bedroom 3 2.400 1.750Bath / WC NALaundry NAKitchen 3.540 1.750Dining 3.690 1.750Family 2.740 1.750Living 3.690 1.750Entry NA
1. Page 82 – rule 7.2.5 Hanging Beams (building practice)
7.2.5
2. Page 99 – rule 7.3.7 Hanging Beams (member sizes)
7.3.7
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
23
4. Determine Hanging Beams to rooms from table 23 supp. 6, MGP15
3.500 1.750
3. Obtain information for Rafters
Member Rule/Table Size Comments
Common Rafter R
T
R
Rafter Spacing
RLW
Eaves O/Hang
Underpurlin is mid-span of Rafter
Fill in comments column with information from project specification & Prelim. Calcs.1. Page 86 – rule 7.2.11 Rafters(building practice)
7.2.11
2. Page 105 – rule 7.3.13 Rafters (member sizes)
7.3.13
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
3. Obtain information for Rafters
Member Rule/Table Size Comments
Common Rafter R
T
R
Rafter Spacing
RLW
Eaves O/Hang
Underpurlin is mid-span of Rafter
Fill in comments column with information from project specification & Prelim. Calcs.1. Page 86 – rule 7.2.11 Rafters(building practice)
7.2.11
2. Page 105 – rule 7.3.13 Rafters (member sizes)
7.3.13
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
29
4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)
3. Obtain information for Rafters
Member Rule/Table Size Comments
Common Rafter R
T
R
Rafter Spacing
RLW
Eaves O/Hang
Underpurlin is mid-span of Rafter
Fill in comments column with information from project specification & Prelim. Calcs.
1.200
1. Page 86 – rule 7.2.11 Rafters(building practice)
7.2.11
2. Page 105 – rule 7.3.13 Rafters (member sizes)
7.3.13
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
29
4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)
3. Obtain information for Rafters
Member Rule/Table Size Comments
Common Rafter R
T
R
Rafter Spacing
RLW
Eaves O/Hang
Underpurlin is mid-span of Rafter
Fill in comments column with information from project specification & Prelim. Calcs.
1.200
2.100
1. Page 86 – rule 7.2.11 Rafters(building practice)
7.2.11
2. Page 105 – rule 7.3.13 Rafters (member sizes)
7.3.13
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
29
4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)
3. Obtain information for Rafters
Member Rule/Table Size Comments
Common Rafter R
T
R
Rafter Spacing
RLW
Eaves O/Hang
Underpurlin is mid-span of Rafter
Fill in comments column with information from project specification & Prelim. Calcs.
1.200
2.100
0.693
1. Page 86 – rule 7.2.11 Rafters(building practice)
7.2.11
2. Page 105 – rule 7.3.13 Rafters (member sizes)
7.3.13
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
29
4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)
3. Obtain information for Rafters
Member Rule/Table Size Comments
Common Rafter R
T
R
Rafter Spacing
RLW
Eaves O/Hang
Underpurlin is mid-span of Rafter
Fill in comments column with information from project specification & Prelim. Calcs.
1.200
2.100
0.693
1. Page 86 – rule 7.2.11 Rafters(building practice)
7.2.11
2. Page 105 – rule 7.3.13 Rafters (member sizes)
7.3.13
3. Determine Span Table of supplements (supp. 6, N3, s/softwood, MGP 15)
29
4. Determine Rafter Size from table 29 supp. 6, MGP15, N3(Check - single or continuous span - roof mass – span – O/hang)
140 x 45
4. Obtain information for Collar Ties
Member Rule/Table Size Comments
Collar Ties R
Tor
Length
Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.
Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.
7.2.16 &7.3.17
4. Obtain information for Collar Ties
Member Rule/Table Size Comments
Collar Ties R
Tor
Length
Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.
Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.
7.2.16 &7.3.17
Page 110, Table 7.6 – Collar Ties gives required Information
7.6 (page 110)
4. Obtain information for Collar Ties
Member Rule/Table Size Comments
Collar Ties R
Tor
Length
Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.
Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.
7.2.16 &7.3.17
Page 110, Table 7.6 – Collar Ties gives required Information
7.6 (page 110)
Refer to floor plan to calculate length of collar tie: 7.270 / 2 = 3.635
3.635
4. Obtain information for Collar Ties
Member Rule/Table Size Comments
Collar Ties R
T
70 x 35 Length
Check section 7 (Roof Framing) for information – rules & tables for Collar TiesNote: Find rules relating to Collar Ties.
Page 90 Rule 7.2.16 & Page 109, Rule 7.3.17 – Other members or Components, states that Table 7.6 give details for miscellaneous roof framing members not given in span tables of the supplements.
7.2.16 &7.3.17
Page 110, Table 7.6 – Collar Ties gives required Information
7.6 (page 110)
Refer to floor plan to calculate length of collar tie: 7.270 / 2 = 3.635
3.635
5. Obtain information for Ridge board
Member Rule/Table Size Comments
Ridge R
T
Not Strutted
Check section 7 (Roof Framing) for information – rules & tables for Ridge boardsNote: Find rules relating to Ridge boards
7.2.12
5. Obtain information for Ridge board
Member Rule/Table Size Comments
Ridge R
T
Not Strutted
Check section 7 (Roof Framing) for information – rules & tables for Ridge boardsNote: Find rules relating to Ridge boards
Page 86, Rule 7.2.12 – The size of Ridge boards shall be determined from Table 7.6
7.2.12
7.6 (page 110)
Table 7.6 Ridge boards – Refers to Unstrutted ridges in coupled roofs has having a depth not less than length of Rafter Plumb-Cut x 19mm thick
Rafter 140 x 45 MGP 15 Seasoned Softwood
Ridge
0.140
Length of Plumb Cut
Length of Plumb cut = Rafter Depth Cos. Roof Pitch
= 0.140 Cos. 300
= 0.162
0.16
2
Refer Table 7.6 (AS 1684.2) page 110, Ridge depth = rafter plumb cut x 19mm thick.
Therefore use 170 x 19 MGP 15 S/wood.
5. Obtain information for Ridge board
Member Rule/Table Size Comments
Ridge R
T
Not Strutted
Check section 7 (Roof Framing) for information – rules & tables for Ridge boardsNote: Find rules relating to Ridge boards
Page 86, Rule 7.2.12 – The size of Ridge boards shall be determined from Table 7.6
7.2.12
7.6 (page 110)
Table 7.6 Ridge boards – Refers to Unstrutted ridges in coupled roofs has having a depth not less than length of Rafter Plumb-Cut x 19mm thick
Calculate Rafter Plumb-Cut Length - 0.140 = 0.162 (Therefore 170 x 19 Ridge)cos 30
170 x 19
6. Obtain information for Hip Rafter (Hip)
Member Rule/Table Size Comments
Hip Rafter R
R
T
Check section 7 (Roof Framing) for information – rules & tables for Hip RaftersNote: Find rules relating to Hip rafters
Page 87, Rule 7.2.13 – Hip & Valley Rafters
7.2.13
7.3.17
)
6. Obtain information for Hip Rafter (Hip)
Member Rule/Table Size Comments
Hip Rafter R
R
T
Check section 7 (Roof Framing) for information – rules & tables for Hip RaftersNote: Find rules relating to Hip rafters
Page 87, Rule 7.2.13 – Hip & Valley Rafters Page 109, Rule 7.3.17 - The size of Miscellaneous roof members
shall be determined from Table 7.6
7.2.13
7.3.17
7.6 (Page 110)
Table 7.6 - states that hips should be 50mm greater In depth than rafters x 19 thick (seasoned) for stress grades F11/ MGP15 min. No less than rafter stress grade.
6. Obtain information for Hip Rafter (Hip)
Member Rule/Table Size Comments
Hip Rafter R
R
T
Check section 7 (Roof Framing) for information – rules & tables for Hip RaftersNote: Find rules relating to Hip rafters
Page 87, Rule 7.2.13 – Hip & Valley Rafters Page 109, Rule 7.3.17 - The size of Miscellaneous roof members
shall be determined from Table 7.6
7.2.13
7.3.17
7.6 (Page 110)
Table 7.6 - states that hips should be 50mm greater In depth than rafters x 19 thick (seasoned) for stress grades F11/ MGP15 min. No less than rafter stress grade.
Use 190 x 19 Hip Rafters (140 + 50 = 190)
190 x 19
7. Obtain information for Under purlins
Member Rule/Table Size Comments
Underpurlin R
R
T
140 x 70
Span Direct from Span Tables of Supplements.
Max. Span =
Check section 7 (Roof Framing) for information – rules & tables for UnderpurlinsNote: Find rules relating to Underpurlins
Page 84, Rule 7.2.10 – Underpurlins
7.2.10
7.3.12
7. Obtain information for Under purlins
Member Rule/Table Size Comments
Underpurlin R
R
T
140 x 70
Span Direct from Span Tables of Supplements.
Max. Span =
Check section 7 (Roof Framing) for information – rules & tables for UnderpurlinsNote: Find rules relating to Underpurlins
Page 84, Rule 7.2.10 – UnderpurlinsPage 104, Rule 7.3.12 - Size of Underpurlins Span Table 28 of Supplements
7.2.10
7.3.12
28
Refer Table 28 – Continuous Span - for allowable span to Underpurlin (Rafter spacing = 1200, RLW = 2100 & Roof Mass = 10Kg/m2)
Determine allowable Max. Span for Underpurlin size 140 x 70 from Table 28
We must interpolate between a RLW of 1800 & 2700 Continuous Span
1800 2100 2700
5600 ? 4600
We must interpolate between a RLW of 1800 & 2700
1800 2100 2700
5600 ? 4600
300/900 = x/1000
We must interpolate between a RLW of 1800 & 2700
1800 2100 2700
4900 ? 4300
300/900 = x/600
X = 333 ? = 4567
7. Obtain information for Under purlins
Member Rule/Table Size Comments
Underpurlin R
R
T
140 x 70
Span Direct from Span Tables of Supplements.
Max. Span =
Check section 7 (Roof Framing) for information – rules & tables for UnderpurlinsNote: Find rules relating to Underpurlins
Page 84, Rule 7.2.10 – UnderpurlinsPage 104, Rule 7.3.12 - Size of Underpurlins Span Table 28 of Supplements
7.2.10
7.3.12
28
Refer Table 28 – Continuous Span - for allowable span to Underpurlin (Rafter spacing = 1200, RLW = 2100 & Roof Mass = 10Kg/m2)
Determine allowable Max. Span for Underpurlin size 140 x 70 from Table 28
4.567m
8. Obtain information for Struts (Roof Strutting)
Member Rule/Table Size Comments
Struts R
R
T
or
Straight Strut Length =
Fan Strut Length =
Check section 7 (Roof Framing) for information – rules & tables for Struts
Note: Find rules relating to Struts
Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.
7.2.15
7.2.15.3
From Prelim. Calcs. Fill in lengths for straight & fan struts.
8. Obtain information for Struts (Roof Strutting)
Member Rule/Table Size Comments
Struts R
R
T
or
Straight Strut Length =
Fan Strut Length =
Check section 7 (Roof Framing) for information – rules & tables for Struts
Note: Find rules relating to Struts
Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.Page 109, Rule 7.3.17 - The size of Miscellaneous roof members
shall be determined from Table 7.6
7.2.15
7.2.15.3
7.6
From Prelim. Calcs. Fill in lengths for straight & fan struts.
Using Table 7.6 Determine section size of Struts – (Sheet Roof)
8. Obtain information for Struts (Roof Strutting)
Member Rule/Table Size Comments
Struts R
R
T
or
Straight Strut Length =
Fan Strut Length =
Check section 7 (Roof Framing) for information – rules & tables for Struts
Note: Find rules relating to Struts
Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.Page 109, Rule 7.3.17 - The size of Miscellaneous roof members
shall be determined from Table 7.6
7.2.15
7.2.15.3
7.6
From Prelim. Calcs. Fill in lengths for straight & fan struts.
1.211m
1.713m
Using Table 7.6 Determine section size of Struts – (Sheet Roof)
8. Obtain information for Struts (Roof Strutting)
Member Rule/Table Size Comments
Struts R
R
T
Straight Strut Length =
Fan Strut Length =
Check section 7 (Roof Framing) for information – rules & tables for Struts
Note: Find rules relating to Struts
Page 87, Rule 7.2.15 – Roof Strutting & Page 90, Rule 7.2.15.3 Fan Struts.Page 109, Rule 7.3.17 - The size of Miscellaneous roof members
shall be determined from Table 7.6
7.2.15
7.2.15.3
7.6
From Prelim. Calcs. Fill in lengths for straight & fan struts.
1.211m
1.713m
Using Table 7.6 Determine section size of Struts – (Sheet Roof)
90 x 45
2/90x45
9. Obtain information for Strutting Beams
Member Rule/Table Size Comments
Strutting Beams
•Supporting roof & Ceiling Loads.
•Use: Hyspan LVL Location Span Spacing
Living/Dining
Living/Family
• Use Hyspan LVL Span Tables for Residential Building
• Calculate spans for strutting beams from floor plan
0.450 3.500 0.090 2.4000.090
1.8000.090
6.430 0.240
14.640
1.500
0.240
3.500 0.0
900.9
100.0
902.500
0.240
0.240
3.500
0.090
2.400
0.240
0.450 2.5000.0902.500
0.090 0.090 0.0903.690 0.240
3.500
0.450
0.240
7.57
0
1.800 3.540
Bed 2
W1 W2 W3 D1 W4 W5
W6W7W8W9
Bed 1 Bed 3Entry
Family
Living
DiningKitchenL'dryBath &
W.C.
Direction of Ceiling Joists
Chan
ge in
dir
ection
of
Ceili
ng
Joists
John BridgesAugust 2004NTS
D2
D3D4D5
D6
D7 D8
Beam to Living/Dining span = 3.690Beam to Living/Family span = 3.500
Floor Plan Class Exercise 1
8. Obtain information for Strutting Beams
Member Rule/Table Size Comments
Strutting Beams
•Supporting roof & Ceiling Loads.
•Use: Hyspan LVL Location Span Spacing
Living/Dining
Living/Family
• Use Hyspan LVL Span Tables for Residential Building
• Calculate spans for strutting beams from floor plan
• Fill in span information
3.690
3.500
• Spacing as per plan
Centre
Off Centre3.690 / 2.740
• Determine table numbers from Hyspan LVL tables to select beam section sizes
Use table 17 for BeamTo Living/Dining -Span = 3.690
Supporting Underpurlins& Ceiling Joists
Go to Table 17 for member size
RLW = 2.100
Span = 3.690
Beam Size= 170 x 63
8. Obtain information for Strutting Beams
Member Rule/Table Size Comments
Strutting Beams
•Supporting roof & Ceiling Loads.
•Use: Hyspan LVL Location Span Spacing
Living/Dining
Living/Family
• Use Hyspan LVL Span Tables for Residential Building
• Calculate spans for strutting beams from floor plan
• Fill in span information
3.690
3.500
• Spacing is centre of rooms
Centre
Off Centre3.690 / 2.740
• Determine table numbers from Hyspan LVL tables to select beam section sizes
• Fill in Data for Living/Dining Beam
T 17 170 x 63
Use table 18 for BeamTo Living/Family -Span = 3.500
Supporting Underpurlins& Hanging Beams
Go to Table 18for member size
RLW = 3.215
Span = 3.500
Beam Size= 2/170x36
8. Obtain information for Strutting Beams
Member Rule/Table Size Comments
Strutting Beams
•Supporting roof & Ceiling Loads.
•Use: Hyspan LVL Location Span Spacing
Living/Dining
Living/Family
• Use Hyspan LVL Span Tables for Residential Building
• Calculate spans for strutting beams from floor plan
• Fill in span information
3.690
3.500
• Spacing is centre of rooms
Centre
Off Centre3.215
• Determine table numbers from Hyspan LVL tables to select beam section sizes
• Fill in Data for Living/Dining Beam
T 17 170 x 63
• Fill in Data for Living/Family Beam
T 18 2/170x36
Part A can now be completed.
On the plan supplied clearly mark all Hanging Beams, Underpurlins
and any Strutting Beams & / or Special Strutting Beams supporting
Roof and Ceiling loads.
0.450 3.500 0.090 2.4000.090
1.8000.090
6.430 0.240
14.640
1.500
0.240
3.500 0.0
900.9
100.0
902.500
0.240
0.240
3.500
0.090
2.400
0.240
0.450 2.5000.0902.500
0.090 0.090 0.0903.690 0.240
3.500
0.450
0.240
7.57
0
1.800 3.540
Bed 2
W1 W2 W3 D1 W4 W5
W6W7W8W9
Bed 1 Bed 3Entry
Family
Living
DiningKitchenL'dryBath &
W.C.
Direction of Ceiling Joists
Chan
ge in
dir
ection
of
Ceili
ng
Joists
John BridgesAugust 2004NTS
D2
D3D4D5
D6
D7 D8
Strutting
Hyspan Strutting BeamsHanging Beams
Under Purlins
xxx
x x
x
x x
Class Exercise 1 – Now Complete
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