9.41.2.2. Performance Level Evaluation and Compensating Construction (1) The performance level of a building after construction shall not be less than the performance level of the building prior to construction. (2) For the purposes of Sentence (1), reduction of performance level shall be determined in accordance with Articles 11.4.2.1, 11.4.2.3. and 11.4.2.5. (3) Where the proposed construction would reduce the performance level of an existing building, compensating construction shall be required in conformance with Articles 11.4.3.1., 11.4.3.2, 11.4.3.4 and 11.4.3.6. (4) Section 11.5. applies in respect of the requirements of Sentences 11.4.3.4.(1), (3) and (4). Table A-1 Maximum Spans for Floor Joists — General Cases(1) Forming Part of Sentence 9.23.4.2.(1)  Commercial Designation

Grade

Joist   Size,   mm

Maximum Span, m


With Strapping

With Bridging

With Strapping   and Bridging


Joist Spacing, mm

Joist Spacing, mm

Joist Spacing,   mm


300

400

600

300

400

600

300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select   Structural

38 x 89

2.13

1.97

1.73

2.19

1.99

1.73

2.19

1.99

1.73


 

38 x 140

3.23

3.07

2.73

3.44

3.12

2.73

3.44

3.12

2.73


 

38 x 184

3.88

3.69

3.51

4.18

3.92

3.59

4.37

4.07

3.59


 

38 x 235

4.57

4.34

4.13

4.86

4.57

4.29

5.05

4.70

4.39


 

38 x 286

5.21

4.95

4.71

5.49

5.16

4.85

5.66

5.28

4.92


No. 1 and   No. 2

38 x 89

2.00

1.85

1.66

2.09

1.90

1.66

2.09

1.90

1.66


 

38 x 140

3.09

2.91

2.62

3.29

2.99

2.62

3.29

2.99

2.62


 

38 x 184

3.71

3.53

3.36

4.00

3.76

3.44

4.19

3.90

3.44


 

38 x 235

4.38

4.16

3.96

4.66

4.38

4.11

4.84

4.51

4.20


 

38 x 286

4.99

4.75

4.52

5.26

4.94

4.65

5.43

5.06

4.72


No. 3

38 x 89

1.90

1.69

1.38

1.95

1.69

1.38

1.95

1.69

1.38


 

38 x 140

2.78

2.41

1.97

2.78

2.41

1.97

2.78

2.41

1.97


 

38 x 184

3.38

2.93

2.39

3.38

2.93

2.39

3.38

2.93

2.39


 

38 x 235

4.14

3.58

3.93

4.14

3.58

2.93

4.14

3.58

2.93


 

38 x 286

4.80

4.16

3.39

4.80

4.16

3.39

4.80

4.16

3.39


Construction

38 x 89

1.90

1.77

1.61

2.03

1.84

1.61

2.03

1.84

1.61


Standard

38 x 89

1.81

1.63

1.33

1.88

1.63

1.33

1.88

1.63

1.33


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select   Structural

38 x 89

2.08

1.93

1.71

2.16

1.96

1.71

2.16

1.96

1.71


 

38 x 140

3.18

3.03

2.69

3.39

3.08

2.69

3.39

3.08

2.69


 

38 x 184

3.82

3.64

3.46

4.12

3.87

3.54

4.31

4.02

3.54


 

38 x 235

4.50

4.28

4.08

4.80

4.51

4.23

4.98

4.64

4.33


 

38 x 286

5.14

4.89

4.65

5.42

5.09

4.78

5.59

5.21

4.86


No. 1 and   No. 2

38 x 89

2.00

1.85

1.66

2.09

1.90

1.66

2.09

1.90

1.66


 

38 x 140

3.09

2.91

2.62

3.29

2.99

2.62

3.29

2.99

2.62


 

38 x 184

3.71

3.53

3.36

4.00

3.76

3.44

4.19

3.90

3.44


 

38 x 235

4.38

4.16

3.96

4.66

4.38

4.11

4.84

4.51

4.20


 

38 x 286

4.99

4.75

4.52

5.26

4.94

4.65

5.43

5.06

4.72


No. 3

38 x 89

1.90

1.77

1.61

2.03

1.84

1.61

2.03

1.84

1.61


 

38 x 140

2.99

2.78

2.43

3.19

2.90

2.43

3.19

2.90

2.43


 

38 x 184

3.60

3.42

2.95

3.88

3.61

2.95

4.06

3.61

2.95


 

38 x 235

4.24

4.03

3.61

4.51

4.24

3.61

4.68

4.37

3.61


 

38 x 286

4.84

4.60

4.19

5.10

4.79

4.19

5.26

4.90

4.19


Construction

38 x 89

1.90

1.77

1.61

2.03

1.84

1.61

2.03

1.84

1.61


Standard

38 x 89

1.81

1.68

1.39

1.96

1.71

1.39

1.96

1.71

1.39


Spruce –Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select   Structural

38 x 89

1.95

1.81

1.64

2.06

1.87

1.64

2.06

1.87

1.64


 

38 x 140

3.05

2.85

2.57

3.24

2.95

2.57

3.24

2.95

2.57


 

38 x 184

3.66

3.48

3.31

3.94

3.70

3.38

4.12

3.84

3.38


 

38 x 235

4.31

4.10

3.90

4.59

4.31

4.05

4.76

4.44

4.14


 

38 x 286

4.91

4.67

4.45

5.18

4.87

4.57

5.34

4.98

4.64


No. 1 and   No. 2

38 x 89

1.86

1.72

1.58

1.99

1.81

1.58

1.99

1.81

1.58


 

38 x 140

2.92

2.71

2.49

3.14

2.85

2.49

3.14

2.85

2.49


 

38 x 184

3.54

3.36

3.20

3.81

3.58

3.27

3.99

3.72

3.27


 

38 x 235

4.17

3.96

3.77

4.44

4.17

3.92

4.60

4.29

4.00


 

38 x 286

4.75

4.52

4.30

5.01

4.71

4.42

5.17

4.82

4.49


No. 3

38 x 89

1.81

1.68

1.55

1.96

1.78

1.55

1.96

1.78

1.55


 

38 x 140

2.84

2.64

2.43

3.08

2.80

2.43

3.08

2.80

2.43


 

38 x 184

3.47

3.30

2.95

3.74

3.52

2.95

3.92

3.61

2.95


 

38 x 235

4.09

3.89

3.61

4.36

4.09

3.61

4.52

4.22

3.61


 

38 x 286

4.67

4.44

4.19

4.92

4.62

4.19

5.08

4.73

4.19


Construction

38 x 89

1.81

1.68

1.55

1.96

1.78

1.55

1.96

1.78

1.55


Standard

38 x 89

1.70

1.58

1.44

1.88

1.71

1.44

1.88

1.71

1.44


Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules)

Select   Structural

38 x 89

1.65

1.53

1.42

1.84

1.68

1.46

1.84

1.68

1.46


 

38 x 140

2.59

2.41

2.24

2.90

2.63

2.30

2.90

2.63

2.30


 

38 x 184

3.27

3.11

2.94

3.52

3.31

3.03

3.69

3.44

3.03


 

38 x 235

3.85

3.66

3.48

4.10

3.85

3.62

4.26

3.97

3.70


 

38 x 286

4.39

4.18

3.97

4.63

4.35

4.09

4.78

4.45

4.15


No. 1 and   No. 2

38 x 89

1.59

1.48

1.37

1.80

1.64

1.43

1.80

1.64

1.43


 

38 x 140

2.51

2.33

2.16

2.83

2.57

2.25

2.83

2.57

2.25


 

38 x 184

3.19

3.04

2.84

3.44

3.23

2.96

3.60

3.36

2.96


 

38 x 235

3.76

3.58

3.41

4.01

3.77

3.54

4.16

3.88

3.62


 

38 x 286

4.29

4.08

3.88

4.53

4.25

4.00

4.67

4.35

4.06


No. 3

38 x 89

1.54

1.43

1.32

1.74

1.57

1.36

1.76

1.60

1.36


 

38 x 140

2.42

2.24

1.94

2.74

2.38

1.94

2.75

2.38

1.94


 

38 x 184

3.12

2.90

2.37

3.35

2.90

2.37

3.35

2.90

2.37


 

38 x 235

3.67

3.49

2.89

3.91

3.54

2.89

4.06

3.54

2.89


 

38 x 286

4.19

3.98

3.36

4.42

4.11

3.36

4.55

4.11

3.36


Construction

38 x 89

1.54

1.43

1.32

1.74

1.57

1.40

1.76

1.60

1.40


Standard

38 x 89

1.48

1.37

1.15

1.63

1.41

1.15

1.63

1.41

1.15


Column 1

2

3

4

5

6

7

8

9

10

11

12 Note to Table A-1: (1)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. Table A-2 Maximum Spans for Floor Joists — Special Cases(1) Forming Part of Sentence 9.23.4.2.(1) and 9.23.4.4.(2)  Commercial Designation

Grade

Joist   Size, mm

Maximum Span, m


Joists with Ceilings Attached to Wood Furring

Joists with Concrete   Topping


Without Bridging

With Bridging

With or Without Bridging(2)


Joist Spacing, mm

Joist Spacing, mm

Joist Spacing, mm


300

400

600

300

400

600

300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select Structural

38 x 89

2.19

1.99

1.73

2.19

1.99

1.73

2.19

1.99

1.73


 

38 x 140

3.44

3.12

2.73

3.44

3.12

2.73

3.44

3.12

2.73


 

38 x 184

4.24

3.99

3.59

4.52

4.11

3.59

4.52

4.11

3.59


 

38 x 235

4.98

4.69

4.29

5.47

5.20

4.58

5.77

5.24

4.58


 

38 x 286

5.67

5.34

4.88

6.19

5.89

5.54

6.83

6.37

5.58


No. 1 and No. 2

38 x 89

2.09

1.90

1.66

2.09

1.90

1.66

2.09

1.90

1.66


 

38 x 140

3.29

2.99

2.62

3.29

2.99

2.62

3.29

2.99

2.55


 

38 x 184

4.06

3.83

3.44

4.33

3.93

3.44

4.33

3.81

3.11


 

38 x 235

4.78

4.50

4.11

5.24

4.98

4.31

5.37

4.65

3.80


 

38 x 286

5.44

5.12

4.68

5.93

5.64

5.00

6.24

5.40

4.41


No. 3

38 x 89

1.95

1.69

1.38

1.95

1.69

1.38

1.72

1.49

1.21


 

38 x 140

2.78

2.41

1.97

2.78

2.41

1.97

2.45

2.12

1.73


 

38 x 184

3.38

2.93

2.39

3.38

2.93

2.39

2.98

2.58

2.11


 

38 x 235

4.14

3.58

2.93

4.14

3.58

2.93

3.65

3.16

2.58


 

38 x 286

4.80

4.16

3.39

4.80

4.16

3.39

4.23

3.66

2.99


Construction

38 x 89

2.03

1.84

1.61

2.03

1.84

1.61

2.03

1.84

1.61


Standard

38 x 89

1.88

1.63

1.33

1.88

1.63

1.33

1.66

1.44

1.17


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select Structural

38 x 89

2.16

1.96

1.71

2.16

1.96

1.71

2.16

1.96

1.71


 

38 x 140

3.39

3.08

2.69

3.39

3.08

2.69

3.39

3.08

2.69


 

38 x 184

4.18

3.94

3.54

4.46

4.05

3.54

4.46

4.05

3.54


 

38 x 235

4.92

4.63

4.23

5.39

5.13

4.52

5.69

5.17

4.52


 

38 x 286

5.60

5.27

4.82

6.10

5.81

5.47

6.74

6.28

5.50


No .1 and No. 2

38 x 89

2.09

1.90

1.66

2.09

1.90

1.66

2.09

1.90

1.66


 

38 x 140

3.29

2.99

2.62

3.29

2.99

2.62

3.29

2.99

2.62


 

38 x 184

4.06

3.83

3.44

4.33

3.93

3.44

4.33

3.93

3.26


 

38 x 235

4.78

4.50

4.11

5.24

4.98

4.39

5.53

4.88

3.99


 

38 x 286

5.44

5.12

4.68

5.93

5.64

5.25

6.54

5.66

4.63


No. 3

38 x 89

2.03

1.84

1.61

2.03

1.84

1.61

2.03

1.83

1.50


 

38 x 140

3.19

2.90

2.43

3.19

2.90

2.43

3.02

2.62

2.14


 

38 x 184

3.94

3.61

2.95

4.17

3.61

2.95

3.68

3.18

2.60


 

38 x 235

4.63

4.36

3.61

5.08

4.42

3.61

4.50

3.89

3.18


 

38 x 286

5.27

4.96

4.19

5.74

5.13

4.19

5.22

4.52

3.69


Construction

38 x 89

2.03

1.84

1.61

2.03

1.84

1.61

2.03

1.84

1.61


Standard

38 x 89

1.96

1.71

1.39

1.96

1.71

1.39

1.74

1.50

1.23


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select Structural

38 x 89

2.06

1.87

1.64

2.06

1.87

1.64

2.06

1.87

1.64


 

38 x 140

3.24

2.95

2.57

3.24

2.95

2.57

3.24

2.95

2.57


 

38 x 184

4.00

3.77

3.38

4.26

3.87

3.38

4.26

3.87

3.38


 

38 x 235

4 70

4.43

4.05

5.16

4.91

4.32

5.45

4.95

4.32


 

38 x 286

5.35

5.04

4.61

5.84

5.55

5.23

6.45

6.01

5.26


No. 1 and No. 2

38 x 89

1.99

1.81

1.58

1.99

1.81

1.58

1.99

1.81

1.58


 

38 x 140

3.14

2.85

2.49

3.14

2.85

2.49

3.14

2.85

2.49


 

38 x 184

3.87

3.64

3.27

4.12

3.75

3.27

4.12

3.75

3.27


 

38 x 235

4.55

4.28

3.91

4.99

4.75

4.18

5.27

4.79

4.13


 

38 x 286

5.18

4.88

4.46

5.65

5.37

5.06

6.23

5.81

4.79


No. 3

38 x 89

1.96

1.78

1.55

1.96

1.78

1.55

1.96

1.78

1.50


 

38 x 140

3.08

2.80

2.43

3.08

2.80

2.43

3.02

2.62

2.14


 

38 x 184

3.80

3.58

2.95

4.05

3.61

2.95

3.68

3.18

2.60


 

38 x 235

4.47

4.21

3.61

4.90

4.42

3.61

4.50

3.89

3.18


 

38 x 286

5.09

4.79

4.19

5.55

5.13

4.19

5.22

4.52

3.69


Construction

38 x 89

1.96

1.78

1.55

1.96

1.78

1.55

1.96

1.78

1.55


Standard

38 x 89

1.88

1.71

1.44

1.88

1.71

1.44

1.80

1.56

1.27


Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules)

Select Structural

38 x 89

1.84

1.68

1.46

1.84

1.68

1.46

1.84

1.68

1.46


 

38 x 140

2.90

2.63

2.30

2.90

2.63

2.30

2.90

2.63

2.30


 

38 x 184

3.58

3.37

3.03

3.81

3.46

3.03

3.81

3.46

3.03


 

38 x 235

4.20

3.96

3.62

4.61

4.39

3.86

4.87

4.42

3.86


 

38 x 286

4.79

4.51

4.12

5.22

4.96

4.68

5.76

5.37

4.54


No. 1 and No. 2

38 x 89

1.80

1.64

1.43

1.80

1.64

1.43

1.80

1.64

1.43


 

38 x 140

2.83

2.57

2.25

2.83

2.57

2.25

2.83

2.57

2.23


 

38 x 184

3.50

3.29

2.96

3.72

3.38

2.96

3.72

3.32

2.71


 

38 x 235

4.11

3.87

3.54

4.51

4.29

3.76

4.69

4.06

3.31


 

38 x 286

4.68

4.40

4.03

5.10

4.85

4.36

5.44

4.71

3.84


No. 3

38 x 89

1.76

1.60

1.36

1.76

1.60

1.36

1.70

1.47

1.20


 

38 x 140

2.75

2.38

1.94

2.75

2.38

1.94

2.42

2.10

1.71


 

38 x 184

3.35

2.90

2.37

3.35

2.90

2.37

2.95

2.55

2.08


 

38 x 235

4.01

3.54

2.89

4.09

3.54

2.89

3.61

3.12

2.55


 

38 x 286

4.56

4.11

3.36

4.75

4.11

3.36

4.18

3.62

2.96


Construction

38 x 89

1.76

1.60

1.40

1.76

1.60

1.40

1.76

1.60

1.37


Standard

38 x 89

1.63

1.41

1.15

1.63

1.41

1.15

1.44

1.25

1.02


Column 1

2

3

4

5

6

7

8

9

10

11

12 Notes to Table A-2: (1)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. (2)No bridging is assumed for spans for floor joists with concrete topping. Table A-3 Maximum Spans for Ceiling Joists — Attic not Accessible by a Stairway Forming Part of Sentence 9.23.4.2.(1)  Commercial Designation

Grade

Joist Size, mm

Maximum Span, m


Joist Spacing, mm


300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select Structural

38 x 89

3.41

3.10

2.71


 

38 x 140

5.37

4.88

4.26


 

38 x 184

7.05

6.40

5.59


 

38 x 235

9.01

8.18

7.15


 

38 x 286

10.96

9.96

8.70


No. 1 and No. 2

38 x 89

3.27

2.97

2.59


 

38 x 140

5.14

4.67

4.08


 

38 x 184

6.76

6.14

5.36


 

38 x 235

8.63

7.84

6.85


 

38 x 286

10.50

9.54

8.34


No. 3

38 x 89

3.17

2.88

2.42


 

38 x 140

4.89

4.23

3.46


 

38 x 184

5.95

5.15

4.20


 

38 x 235

7.27

6.30

5.14


 

38 x 286

8.44

7.31

5.97


Construction

38 x 89

3.17

2.88

2.51


Standard

38 x 89

3.06

2.78

2.34


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select Structural

38 x 89

3.36

3.06

2.67


 

38 x 140

5.29

4.81

4.20


 

38 x 184

6.96

6.32

5.52


 

38 x 235

8.88

8.07

7.05


 

38 x 286

10.81

9.82

8.58


No. 1 and No. 2

38 x 89

3.27

2.97

2.59


 

38 x 140

5.14

4.67

4.08


 

38 x 184

6.76

6.14

5.36


 

38 x 235

8.63

7.84

6.85


 

38 x 286

10.50

9.54

8.34


No. 3

38 x 89

3.17

2.88

2.51


 

38 x 140

4.98

4.53

3.95


 

38 x 184

6.55

5.95

5.19


 

38 x 235

8.36

7.60

6.34


 

38 x 286

10.18

9.01

7.36


Construction

38 x 89

3.17

2.88

2.50


Standard

38 x 89

3.06

2.78

2.43


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select Structural

38 x 89

3.22

2.92

2.55


 

38 x 140

5.06

4.60

4.02


 

38 x 184

6.65

6.05

5.28


 

38 x 235

8.50

7.72

6.74


 

38 x 286

10.34

9.40

8.21


No. 1 and No. 2

38 x 89

3.11

2.83

2.47


 

38 x 140

4.90

4.45

3.89


 

38 x 184

6.44

5.85

5.11


 

38 x 235

8.22

7.47

6.52


 

38 x 286

10.00

9.09

7.94


No. 3

38 x 89

3.06

2.78

2.43


 

38 x 140

4.81

4.37

3.82


 

38 x 184

6.32

5.74

5.02


 

38 x 235

8.07

7.33

6.34


 

38 x 286

9.82

8.93

7.36


Construction

38 x 89

3.06

2.78

2.43


Standard

38 x 89

2.94

2.67

2.33


Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules)

Select Structural

38 x 89

2.88

2.61

2.28


 

38 x 140

4.53

4.11

3.59


 

38 x 184

5.95

5.40

4.72


 

38 x 235

7.60

6.90

6.03


 

38 x 286

9.25

8.40

7.34


No. 1 and No. 2

38 x 89

2.81

2.55

2.23


 

38 x 140

4.42

4.02

3.51


 

38 x 184

5.81

5.28

4.61


 

38 x 235

7.42

6.74

5.89


 

38 x 286

9.03

8.21

7.17


No. 3

38 x 89

2.74

2.49

2.18


 

38 x 140

4.31

3.92

3.42


 

38 x 184

5.67

5.09

4.16


 

38 x 235

7.19

6.23

5.08


 

38 x 286

8.34

7.23

5.90


Construction

38 x 89

2.74

2.49

2.18


Standard

38 x 89

2.67

2.43

2.03


Column 1

2

3

4

5

6 Table A-4 Maximum Spans for Roof Joists — Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentence 9.23.4.2.(1)  Commercial Designation

Grade

Joist Size, mm

Maximum Span, m


Specified Snow Load, kPa


1.0

1.5

2.0


Joist Spacing, mm

Joist Spacing, mm

Joist Spacing, mm


300

400

600

300

400

600

300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select Structural

38 x 89

2.71

2.46

2.15

2.37

2.15

1.88

2.15

1.95

1.71


 

38 x 140

4.26

3.87

3.38

3.72

3.38

2.95

3.38

3.07

2.68


 

38 x 184

5.60

5.09

4.44

4.89

4.44

3.88

4.44

4.04

3.53


 

38 x 235

7.15

6.49

5.67

6.24

5.67

4.96

5.67

5.15

4.50


 

38 x 286

8.70

7.90

6.91

7.60

6.91

6.03

6.91

6.27

5.48


No. 1 and No. 2

38 x 89

2.59

2.36

2.06

2.27

2.06

1.80

2.06

1.87

1.63


 

38 x 140

4.08

3.71

3.24

3.57

3.24

2.83

3.24

2.94

2.57


 

38 x 184

5.36

4.87

4.26

4.69

4.26

3.72

4.26

3.87

3.38


 

38 x 235

6.85

6.22

5.44

5.98

5.44

4.74

5.44

4.94

4.22


 

38 x 286

8.34

7.57

6.40

7.28

6.62

5.50

6.62

6.00

4.90


No. 3

38 x 89

2.49

2.16

1.76

2.14

1.85

1.51

1.91

1.65

1.35


 

38 x 140

3.56

3.08

2.51

3.06

2.65

2.16

2.72

2.36

1.92


 

38 x 184

4.33

3.75

3.06

3.72

3.22

2.63

3.31

2.87

2.34


 

38 x 235

5.29

4.58

3.74

4.55

3.94

3.22

4.05

3.51

2.86


 

38 x 286

6.14

5.32

4.34

5.28

4.57

3.73

4.70

4.07

3.32


Construction

38 x 89

2.51

2.28

1.99

2.20

1.99

1.74

1.99

1.81

1.58


Standard

38 x 89

2.41

2.08

1.70

2.07

1.79

1.46

1.84

1.60

1.30


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select Structural

38 x 89

2.67

2.43

2.12

2.33

2.12

1.85

2.12

1.93

1.68


 

38 x 140

4.20

3.82

3.33

3.67

3.33

2.91

3.33

3.03

2.65


 

38 x 184

5.52

5.02

4.38

4.82

4.38

3.83

4.38

3.98

3.48


 

38 x 235

7.05

6.41

5.60

6.16

5.60

4.89

5.60

5.09

4.44


 

38 x 286

8.58

7.80

6.81

7.50

6.81

5.95

6.81

6.19

5.41


No. 1 and No. 2

38 x 89

2.59

2.36

2.06

2.27

2.06

1.80

2.06

1.87

1.63


 

38 x 140

4.08

3.71

3.24

3.57

3.24

2.83

3.24

2.94

2.57


 

38 x 184

5.36

4.87

4.26

4.69

4.26

3.72

4.26

3.87

3.38


 

38 x 235

6.85

6.22

5.44

5.98

5.44

4.75

5.44

4.94

4.32


 

38 x 286

8.34

7.57

6.62

7.28

6.62

5.77

6.62

6.01

5.25


No. 3

38 x 89

2.51

2.28

1.99

2.20

1.99

1.74

1.99

1.81

1.58


 

38 x 140

3.95

3.59

3.10

3.45

3.14

2.67

3.14

2.85

2.37


 

38 x 184

5.20

4.62

3.77

4.54

3.97

3.24

4.09

3.54

2.89


 

38 x 235

6.53

5.65

4.61

5.61

4.86

3.97

5.00

4.33

3.53


 

38 x 286

7.57

6.56

5.35

6.51

5.64

4.60

5.80

5.02

4.10


Construction

38 x 89

2.51

2.28

1.99

2.20

1.99

1.74

1.99

1.81

1.58


Standard

38 x 89

2.43

2.18

1.78

2.12

1.88

1.53

1.93

1.67

1.36


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select Structural

38 x 89

2.55

2.32

2.03

2.23

2.03

1.77

2.03

1.84

1.61


 

38 x 140

4.02

3.65

3.19

3.51

3.19

2.79

3.19

2.90

2.53


 

38 x 184

5.28

4.80

4.19

4.61

4.19

3.66

4.19

3.81

3.33


 

38 x 235

6.74

6.13

5.35

5.89

5.35

4.68

5.35

4.86

4.25


 

38 x 286

8.21

7.46

6.52

7.17

6.52

5.69

6.52

5.92

5.17


No. 1 and No. 2

38 x 89

2.47

2.24

1.96

2.16

1.96

1.71

1.96

1.78

1.56


 

38 x 140

3.89

3.53

3.08

3.40

3.08

2.69

3.08

2.80

2.45


 

38 x 184

5.11

4.64

4.05

4.46

4.05

3.54

4.05

3.68

3.22


 

38 x 235

6.52

5.93

5.18

5.70

5.18

4.52

5.18

4.70

4.11


 

38 x 286

7.94

7.21

6.30

6.94

6.30

5.50

6.30

5.73

5.00


No. 3

38 x 89

2.43

2.20

1.93

2.12

1.93

1.68

1.93

1.75

1.53


 

38 x 140

3.82

3.47

3.03

3.33

3.03

2.65

3.03

2.75

2.37


 

38 x 184

5.02

4.56

3.77

4.38

3.97

3.24

3.98

3.54

2.89


 

38 x 235

6.41

5.65

4.61

5.60

4.86

3.97

5.00

4.33

3.53


 

38 x 286

7.57

6.56

5.35

6.51

5.64

4.60

5.80

5.02

4.10


Construction

38 x 89

2.43

2.20

1.93

2.12

1.93

1.68

1.93

1.75

1.53


Standard

38 x 89

2.33

2.12

1.85

2.04

1.85

1.59

1.85

1.68

1.41


Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules)

Select Structural

38 x 89

2.28

2.07

1.81

1.99

1.81

1.58

1.81

1.65

1.44


 

38 x 140

3.59

3.26

2.85

3.14

2.85

2.49

2.85

2.59

2.26


 

38 x 184

4.72

4.29

3.75

4.12

3.75

3.27

3.75

3.40

2.97


 

38 x 235

6.03

5.48

4.79

5.27

4.79

4.18

4.79

4.35

3.80


 

38 x 286

7.34

6.67

5.82

6.41

5.82

5.09

5.82

5.29

4.62


No. 1 and No. 2

38 x 89

2.23

2.03

1.77

1.95

1.77

1.55

1.77

1.61

1.41


 

38 x 140

3.51

3.19

2.79

3.07

2.79

2.43

2.79

2.53

2.21


 

38 x 184

4.61

4.19

3.66

4.03

3.66

3.20

3.66

3.33

2.91


 

38 x 235

5.89

5.35

4.68

5.15

4.68

4.09

4.68

4.25

3.68


 

38 x 286

7.17

6.52

5.58

6.26

5.69

4.80

5.69

5.17

4.27


No. 3

38 x 89

2.18

1.98

1.73

1.90

1.73

1.50

1.73

1.57

1.33


 

38 x 140

3.42

3.05

2.49

2.99

2.62

2.14

2.69

2.33

1.90


 

38 x 184

4.28

3.71

3.03

3.68

3.19

2.60

3.28

2.84

2.32


 

38 x 235

5.23

4.53

3.70

4.50

3.90

3.18

4.01

3.47

2.83


 

38 x 286

6.07

5.26

4.29

5.22

4.52

3.69

4.65

4.03

3.29


Construction

38 x 89

2.18

1.98

1.73

1.90

1.73

1.51

1.73

1.57

1.37


Standard

38 x 89

2.09

1.81

1.48

1.80

1.56

1.27

1.60

1.38

1.13


Column 1

2

3

4

5

6

7

8

9

10

11

12 Table A-5 Maximum Spans for Roof Joists — Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentence 9.23.4.2.(1)  Commercial Designation

Grade

Joist Size, mm

Maximum Span, m


Specified Snow Load, kPa


2.5

3.0


Joist Spacing, mm

Joist Spacing, mm


300

400

600

300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select Structural

38 x 89

1.99

1.81

1.58

1.88

1.71

1.49


 

38 x 140

3.14

2.85

2.49

2.95

2.68

2.34


 

38 x 184

4.12

3.75

3.27

3.88

3.53

3.08


 

38 x 235

5.27

4.79

4.18

4.96

4.50

3.93


 

38 x 286

6.41

5.82

5.09

6.03

5.48

4.79


No. 1 and No. 2

38 x 89

1.91

1.74

1.52

1.80

1.63

1.43


 

38 x 140

3.01

2.73

2.39

2.83

2.57

2.25


 

38 x 184

3.95

3.59

3.14

3.72

3.38

2.90


 

38 x 235

5.05

4.59

3.84

4.75

4.32

3.55


 

38 x 286

6.14

5.46

4.46

5.78

5.05

4.12


No. 3

38 x 89

1.74

1.50

1.23

1.60

1.39

1.13


 

38 x 140

2.48

2.15

1.75

2.29

1.98

1.62


 

38 x 184

3.01

2.61

2.13

2.79

2.41

1.97


 

38 x 235

3.69

3.19

2.61

3.41

2.95

2.41


 

38 x 286

4.28

3.70

3.03

3.95

3.42

2.79


Construction

38 x 89

1.85

1.68

1.47

1.74

1.58

1.38


Standard

38 x 89

1.68

1.45

1.19

1.55

1.34

1.10


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select Structural

38 x 89

1.97

1.79

1.56

1.85

1.68

1.47


 

38 x 140

3.10

2.81

2.46

2.91

2.65

2.31


 

38 x 184

4.07

3.70

3.23

3.83

3.48

3.04


 

38 x 235

5.20

4.72

4.12

4.89

4.44

3.88


 

38 x 286

6.32

5.75

5.02

5.95

5.41

4.72


No. 1 and No. 2

38 x 89

1.91

1.74

1.52

1.80

1.63

1.43


 

38 x 140

3.01

2.73

2.39

2.83

2.57

2.25


 

38 x 184

3.95

3.59

3.14

3.72

3.38

2.95


 

38 x 235

5.05

4.59

4.01

4.75

4.32

3.72


 

38 x 286

6.14

5.58

4.68

5.78

5.25

4.32


No. 3

38 x 89

1.85

1.68

1.47

1.74

1.58

1.38


 

38 x 140

2.91

2.65

2.16

2.74

2.45

2.00


 

38 x 184

3.72

3.22

2.63

3.44

2.98

2.43


 

38 x 235

4.55

3.94

3.22

4.20

3.64

2.97


 

38 x 286

5.28

4.57

3.73

4.88

4.22

3.45


Construction

38 x 89

1.85

1.68

1.47

1.74

1.58

1.38


Standard

38 x 89

1.76

1.52

1.24

1.62

1.40

1.15


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select Structural

38 x 89

1.88

1.71

1.49

1.77

1.61

1.41


 

38 x 140

2.96

2.69

2.35

2.79

2.53

2.21


 

38 x 184

3.89

3.54

3.09

3.66

3.33

2.91


 

38 x 235

4.97

4.52

3.94

4.68

4.25

3.71


 

38 x 286

6.05

5.50

4.80

5.69

5.17

4.52


No. 1 and No. 2

38 x 89

1.82

1.65

1.44

1.71

1.56

1.36


 

38 x 140

2.86

2.60

2.27

2.69

2.45

2.14


 

38 x 184

3.76

3.42

2.99

3.54

3.22

2.81


 

38 x 235

4.81

4.37

3.82

4.52

4.11

3.59


 

38 x 286

5.85

5.31

4.64

5.50

5.00

4.37


No. 3

38 x 89

1.79

1.62

1.42

1.68

1.53

1.34


 

38 x 140

2.81

2.56

2.16

2.65

2.40

2.00


 

38 x 184

3.70

3.22

2.63

3.44

2.98

2.43


 

38 x 235

4.55

3.94

3.22

4.20

3.64

2.97


 

38 x 286

5.28

4.57

3.73

4.88

4.22

3.45


Construction

38 x 89

1.79

1.62

1.42

1.68

1.53

1.34


Standard

38 x 89

1.72

1.56

1.29

1.62

1.46

1.19


Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules

Select Structural

38 x 89

1.68

1.53

1.34

1.58

1.44

1.26


 

38 x 140

2.65

2.40

2.10

2.49

2.26

1.98


 

38 x 184

3.48

3.16

2.76

3.27

2.97

2.60


 

38 x 235

4.44

4.04

3.53

4.18

3.80

3.32


 

38 x 286

5.41

4.91

4.29

5.09

4.62

4.04


No. 1 and No. 2

38 x 89

1.64

1.49

1.31

1.55

1.41

1.23


 

38 x 140

2.59

2.35

2.05

2.43

2.21

1.93


 

38 x 184

3.40

3.09

2.70

3.20

2.91

2.53


 

38 x 235

4.34

3.94

3.35

4.09

3.71

3.10


 

38 x 286

5.28

4.76

3.89

4.97

4.40

3.59


No. 3

38 x 89

1.60

1.46

1.21

1.51

1.37

1.12


 

38 x 140

2.45

2.12

1.73

2.26

1.96

1.60


 

38 x 184

2.98

2.58

2.11

2.76

2.39

1.95


 

38 x 235

3.65

3.16

2.58

3.37

2.92

2.38


 

38 x 286

4.23

3.66

2.99

3.91

3.39

2.76


Construction

38 x 89

1.60

1.46

1.27

1.51

1.37

1.20


Standard

38 x 89

1.46

1.26

1.03

1.34

1.16

0.95


Column 1

2

3

4

5

6

7

8

9 Table A-6 Maximum Spans for Roof Rafters Specified Roof Snow Loads 1.0 to 2.0 kPa Forming Part of Sentence 9.23.4.2.(1)  Commercial Designation

Grade

Rafter   Size, mm

Maximum Span, m


Specified Snow Load, kPa


1.0

1.5

2.0


Rafter Spacing, mm

Rafter Spacing, mm

Rafter Spacing, mm


300

400

600

300

400

600

300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select Structural

38 x 89

3.41

3.10

2.71

2.98

2.71

2.37

2.71

2.46

2.15


 

38 x 140

5.37

4.88

4.26

4.69

4.26

3.72

4.26

3.87

3.38


 

38 x 184

7.05

6.41

5.60

6.16

5.60

4.89

5.60

5.09

4.44


 

38 x 235

9.01

8.18

7.15

7.87

7.15

6.24

7.15

6.49

5.62


 

38 x 285

10.96

9.96

8.70

9.58

8.70

7.40

8.70

7.90

6.52


No. 1 and No. 2

38 x 89

3.27

2.97

2.59

2.86

2.59

2.27

2.59

2.36

2.06


 

38 x 140

5.14

4.67

3.95

4.49

4.08

3.34

4.08

3.60

2.94


 

38 x 184

6.76

5.88

4.80

5.74

4.97

4.06

5.06

4.38

3.58


 

38 x 235

8.30

7.19

5.87

7.02

6.08

4.96

6.19

5.36

4.38


 

38 x 285

9.63

8.34

6.81

8.14

7.05

5.76

7.18

6.22

5.08


No. 3

38 x 89

2.65

2.30

1.87

2.24

1.94

1.58

1.98

1.71

1.40


 

38 x 140

3.78

3.28

2.68

3.20

2.77

2.26

2.82

2.44

1.99


 

38 x 184

4.61

3.99

3.26

3.89

3.37

2.75

3.43

2.97

2.43


 

38 x 235

5.63

4.88

3.98

4.76

4.12

3.37

4.20

3.64

2.97


 

38 x 285

6.53

5.66

4.62

5.52

4.78

3.91

4.87

4.22

3.44


Construction

38 x 89

3.17

2.88

2.42

2.77

2.50

2.04

2.51

2.21

1.80


Standard

38 x 89

2.56

2.22

1.81

2.17

1.88

1.53

1.91

1.65

1.35


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select Structural

38 x 89

3.36

3.06

2.67

2.94

2.67

2.33

2.67

2.43

2.12


 

38 x 140

5.29

4.81

4.20

4.62

4.20

3.67

4.20

3.82

3.33


 

38 x 184

6.96

6.32

5.52

6.08

5.52

4.82

5.52

5.02

4.38


 

38 x 235

8.88

8.07

7.05

7.76

7.05

6.16

7.05

6.41

5.54


 

38 x 285

10.81

9.82

8.58

9.45

8.58

7.28

8.58

7.80

6.42


No. 1 and No. 2

38 x 89

3.27

2.97

2.59

2.86

2.59

2.27

2.59

2.36

2.06


 

38 x 140

5.14

4.67

4.08

4.49

4.08

3.50

4.08

3.71

3.08


 

38 x 184

6.76

6.14

5.04

5.90

5.21

4.26

5.31

4.60

3.75


 

38 x 235

8.63

7.54

6.16

7.36

6.37

5.20

6.49

5.62

4.59


 

38 x 285

10.11

8.75

7.15

8.54

7.40

6.04

7.53

6.52

5.33


No. 3

38 x 89

3.17

2.83

2.31

2.76

2.39

1.95

2.44

2.11

1.72


 

38 x 140

4.67

4.04

3.30

3.95

3.42

2.79

3.48

3.01

2.46


 

38 x 184

5.68

4.92

4.02

4.80

4.16

3.40

4.23

3.67

2.99


 

38 x 235

6.95

6.02

4.91

5.87

5.08

4.15

5.18

4.48

3.66


 

38 x 285

8.06

6.98

5.70

6.81

5.90

4.82

6.01

5.20

4.25


Construction

38 x 89

3.17

2.88

2.51

2.77

2.51

2.14

2.51

2.28

1.89


Standard

38 x 89

2.68

2.32

1.90

2.27

1.96

1.60

2.00

1.73

1.41


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select Structural

38 x 89

3.22

2.92

2.55

2.81

2.55

2.23

2.55

2.32

2.03


 

38 x 140

5.06

4.60

4.02

4.42

4.02

3.51

4.02

3.65

3.19


 

38 x 184

6.65

6.05

5.28

5.81

5.28

4.61

5.28

4.80

4.19


 

38 x 235

8.50

7.72

6.74

7.42

6.74

5.89

6.74

6.13

5.35


 

38 x 285

10.34

9.40

8.21

9.03

8.21

7.17

8.21

7.46

6.52


No. 1 and No. 2

38 x 89

3.11

2.83

2.47

2.72

2.47

2.16

2.47

2.24

1.96


 

38 x 140

4.90

4.45

3.89

4.28

3.89

3.40

3.89

3.53

3.08


 

38 x 184

6.44

5.85

5.11

5.62

5.11

4.41

5.11

4.64

3.89


 

38 x 235

8.22

7.47

6.38

7.18

6.52

5.39

6.52

5.82

4.75


 

38 x 285

10.00

9.06

7.40

8.74

7.66

6.25

7.80

6.76

5.52


No. 3

38 x 89

3.06

2.78

2.31

2.67

2.39

1.95

2.43

2.11

1.72


 

38 x 140

4.67

4.04

3.30

3.95

3.42

2.79

3.48

3.01

2.46


 

38 x 184

5.68

4.92

4.02

4.80

4.16

3.40

4.23

3.67

2.99


 

38 x 235

6.95

6.02

4.91

5.87

5.08

4.15

5.18

4.48

3.66


 

38 x 285

8.06

6.98

5.70

6.81

5.90

4.82

6.01

5.20

4.25


Construction

38 x 89

3.06

2.78

2.43

2.67

2.43

2.12

2.43

2.20

1.93


Standard

38 x 89

2.78

2.41

1.97

2.35

2.04

1.66

2.07

1.79

1.47


Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)

Select Structural

38 x 89

2.88

2.61

2.28

2.51

2.28

1.99

2.28

2.07

1.81


 

38 x 140

4.53

4.11

3.59

3.95

3.59

3.14

3.59

3.26

2.85


 

38 x 184

5.95

5.40

4.72

5.20

4.72

4.12

4.72

4.29

3.68


 

38 x 235

7.60

6.90

6.03

6.64

6.03

5.11

6.03

5.48

4.51


 

38 x 285

9.25

8.40

7.01

8.08

7.26

5.93

7.34

6.40

5.23


No. 1 and No. 2

38 x 89

2.81

2.55

2.23

2.46

2.23

1.95

2.23

2.03

1.77


 

38 x 140

4.42

4.02

3.44

3.86

3.51

2.91

3.51

3.14

2.56


 

38 x 184

5.81

5.13

4.19

5.00

4.33

3.54

4.41

3.82

3.12


 

38 x 235

7.24

6.27

5.12

6.12

5.30

4.33

5.40

4.67

3.82


 

38 x 285

8.40

7.27

5.94

7.10

6.15

5.02

6.26

5.42

4.43


No. 3

38 x 89

2.62

2.27

1.85

2.22

1.92

1.57

1.95

1.69

1.38


 

38 x 140

3.74

3.24

2.65

3.16

2.74

2.24

2.79

2.42

1.97


 

38 x 184

4.56

3.94

3.22

3.85

3.33

2.72

3.40

2.94

2.40


 

38 x 235

5.57

4.82

3.94

4.71

4.08

3.33

4.15

3.60

2.94


 

38 x 285

6.46

5.60

4.57

5.46

4.73

3.86

4.82

4.17

3.41


Construction

38 x 89

2.74

2.49

2.11

2.40

2.18

1.90

2.18

1.93

1.57


Standard

38 x 89

2.22

1.93

1.57

1.88

1.63

1.33

1.66

1.44

1.17


Column 1

2

3

4

5

6

7

8

9

10

11

12 Table A-7 Maximum Spans for Roof Rafters — Specified Roof Snow Loads 2.5 and 3.0 kPa Forming Part of Sentence 9.23.4.2.(1)  Commercial Designation

Grade

Rafter   Size, mm

Maximum Span, m


Specified Snow Load, kPa


2.5

3.0


Rafter Spacing, mm

Rafter Spacing, mm


300

400

600

300

400

600


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select Structural

38 x 89

2.51

2.28

1.99

2.37

2.15

1.88


 

38 x 140

3.95

3.59

3.14

3.72

3.38

2.95


 

38 x 184

5.20

4.72

4.12

4.89

4.44

3.83


 

38 x 235

6.64

6.03

5.08

6.24

5.67

4.68


 

38 x 285

8.08

7.23

5.90

7.60

6.65

5.43


No. 1 and No. 2

38 x 89

2.41

2.19

1.86

2.27

2.06

1.71


 

38 x 140

3.76

3.26

2.66

3.46

3.00

2.45


 

38 x 184

4.58

3.96

3.24

4.21

3.65

2.98


 

38 x 235

5.60

4.85

3.96

5.15

4.46

3.64


 

38 x 285

6.50

5.63

4.59

5.98

5.17

4.23


No. 3

38 x 89

1.79

1.55

1.26

1.64

1.42

1.16


 

38 x 140

2.55

2.21

1.80

2.35

2.03

1.66


 

38 x 184

3.10

2.69

2.20

2.86

2.47

2.02


 

38 x 235

3.80

3.29

2.68

3.49

3.02

2.47


 

38 x 285

4.41

3.82

3.12

4.05

3.51

2.87


Construction

38 x 89

2.30

2.00

1.63

2.12

1.84

1.50


Standard

38 x 89

1.73

1.50

1.22

1.59

1.38

1.12


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select Structural

38 x 89

2.48

2.25

1.97

2.33

2.12

1.85


 

38 x 140

3.90

3.54

3.10

3.67

3.33

2.91


 

38 x 184

5.13

4.66

4.07

4.82

4.38

3.77


 

38 x 235

6.55

5.95

5.01

6.16

5.60

4.61


 

38 x 285

7.97

7.12

5.81

7.50

6.55

5.34


No. 1 and No. 2

38 x 89

2.41

2.19

1.91

2.27

2.06

1.80


 

38 x 140

3.79

3.42

2.79

3.57

3.14

2.57


 

38 x 184

4.80

4.16

3.40

4.42

3.83

3.12


 

38 x 235

5.87

5.08

4.15

5.40

4.68

3.82


 

38 x 285

6.81

5.90

4.82

6.27

5.43

4.43


No. 3

38 x 89

2.21

1.91

1.56

2.03

1.76

1.43


 

38 x 140

3.15

2.73

2.23

2.90

2.51

2.05


 

38 x 184

3.83

3.32

2.71

3.52

3.05

2.49


 

38 x 235

4.68

4.06

3.31

4.31

3.73

3.05


 

38 x 285

5.53

4.71

3.84

5.00

4.33

3.54


Commercial

38 x 89

2.33

2.09

1.71

2.20

1.93

1.57


Standard

38 x 89

1.81

1.57

1.28

1.66

1.44

1.18


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select Structural

38 x 89

2.37

2.15

1.88

2.23

2.03

1.77


 

38 x 140

3.73

3.39

2.96

3.51

3.19

2.79


 

38 x 184

4.90

4.45

3.89

4.61

4.19

3.66


 

38 x 235

6.26

5.69

4.97

5.89

5.35

4.68


 

38 x 285

7.62

6.92

5.90

7.17

6.52

5.43


No. 1 and No. 2

38 x 89

2.29

2.08

1.82

2.16

1.96

1.71


 

38 x 140

3.61

3.28

2.86

3.40

3.08

2.66


 

38 x 184

4.74

4.31

3.52

4.46

3.96

3.23


 

38 x 235

6.06

5.27

4.30

5.59

4.84

3.96


 

38 x 285

7.06

6.11

4.99

6.49

5.62

4.59


No. 3

38 x 89

2.21

1.91

1.56

2.03

1.76

1.43


 

38 x 140

3.15

2.73

2.23

2.90

2.51

2.05


 

38 x 184

3.83

3.32

2.71

3.52

3.05

2.49


 

38 x 235

4.68

4.06

3.31

4.31

3.73

3.05


 

38 x 285

5.43

4.71

3.84

5.00

4.33

3.54


Construction

38 x 89

2.25

2.05

1.77

2.12

1.93

1.63


Standard

38 x 89

1.87

1.62

1.33

1.72

1.49

1.22


Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)

Select Structural

38 x 89

2.12

1.93

1.68

1.99

1.81

1.58


 

38 x 140

3.33

3.03

2.65

3.14

2.85

2.49


 

38 x 184

4.38

3.98

3.33

4.12

3.75

3.07


 

38 x 235

5.60

4.99

4.08

5.27

4.59

3.75


 

38 x 285

6.69

5.79

4.73

6.15

5.33

4.35


No. 1 and No. 2

38 x 89

2.07

1.88

1.62

1.95

1.77

1.49


 

38 x 140

3.26

2.84

2.32

3.02

2.61

2.13


 

38 x 184

3.99

3.46

2.82

3.67

3.18

2.60


 

38 x 235

4.88

4.23

3.45

4.49

3.89

3.17


 

38 x 285

5.66

4.90

4.00

5.21

4.51

3.68


No. 3

38 x 89

1.77

1.53

1.25

1.63

1.41

1.15


 

38 x 140

2.52

2.19

1.78

2.32

2.01

1.64


 

38 x 184

3.07

2.66

2.17

2.82

2.45

2.00


 

38 x 235

3.76

3.25

2.66

3.45

2.99

2.44


 

38 x 285

4.36

3.77

3.08

4.01

3.47

2.83


Construction

38 x 89

2.01

1.74

1.42

1.85

1.60

1.31


Standard

38 x 89

1.50

1.30

1.06

1.38

1.19

0.98


Column 1

2

3

4

5

6

7

8

9 Table A-8 Maximum Spans for Built-up Floor Beams Supporting not more than One Floor(1) Forming Part of Sentence 9.23.4.2.(3)  Commercial Designation

Grade

Supported   Length,   mm(4)(5)

Maximum Span, m(2)(3)


Size of Built-up Beam, mm


3 -

4 -

5 -

3 -

4 -

5 -

3 -

4 -

5 -


 

 

 

38 x

38 x

38 x

38 x

38 x

38 x

38 x

38 x

38 x


 

 

 

184

184

184

235

235

235

286

286

286


Douglas Fir – Larch (includes Douglas Fir and Western larch)

Select   Structural

2.4

3.84

4.43

4.96

4.70

5.42

6.06

5.45

6.29

7.03


 

3.0

3.43

3.97

4.43

4.20

4.85

5.42

4.87

5.63

6.29


 

3.6

3.14

3.62

4.05

3.83

4.43

4.95

4.45

5.14

5.74


 

4.2

2.90

3.35

3.75

3.55

4.10

4.58

4.12

4.76

5.32


 

4.8

2.72

3.14

3.51

3.32

3.83

4.29

3.85

4.45

4.97


 

5.4

2.56

2.96

3.31

3.13

3.61

4.04

3.63

4.19

4.69


 

6.0

2.43

2.80

3.14

2.97

3.43

3.83

3.34

3.98

4.45


No. 1 and   No. 2

2.4

2.99

3.45

3.86

3.66

4.22

4.72

4.24

4.90

5.48


 

 

3.0

2.67

3.09

3.45

3.27

3.78

4.22

3.79

4.38

4.90


 

 

3.6

2.44

2.82

3.15

2.98

3.45

3.85

3.46

4.00

4.47


 

 

4.2

2.26

2.61

2.92

2.76

3.19

3.57

3.21

3.70

4.14


 

 

4.8

2.11

2.44

2.73

2.59

2.98

3.34

3.00

3.46

3.87


 

 

5.4

1.99

2.30

2.57

2.44

2.81

3.15

2.83

3.27

3.65


 

 

6.0

1.89

2.18

2.44

2.31

2.67

2.98

2.68

3.10

3.46


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select   Structural

2.4

3.78

4.37

4.88

4.62

5.34

5.97

5.37

6.20

6.93


 

3.0

3.38

3.91

4.37

4.14

4.78

5.34

4.80

5.54

6.20


 

3.6

3.09

3.57

3.99

3.78

4.36

4.87

4.35

5.06

5.66


 

4.2

2.86

3.30

3.69

3.39

4.04

4.51

3.81

4.68

5.24


 

4.8

2.55

3.09

3.45

3.03

3.78

4.22

3.40

4.35

4.90


 

5.4

2.31

2.91

3.25

2.74

3.50

3.98

3.09

3.93

4.62


 

6.0

2.12

2.70

3.09

2.52

3.20

3.78

2.84

3.59

4.35


No. 1 and    No. 2

2.4

3.14

3.62

4.05

3.83

4.43

4.95

4.45

5.14

5.74


 

 

3.0

2.80

3.24

3.62

3.43

3.96

4.43

3.98

4.60

5.14


 

 

3.6

2.56

2.96

3.31

3.13

3.61

4.04

3.63

4.19

4.69


 

 

4.2

2.37

2.74

3.06

2.90

3.35

3.74

3.36

3.88

4.34


 

 

4.8

2.22

2.56

2.86

2.71

3.13

3.50

3.15

3.63

4.06


 

 

5.4

2.09

2.41

2.70

2.56

2.95

3.30

2.97

3.42

3.83


 

 

6.0

1.98

2.29

2.56

2.42

2.80

3.13

2.81

3.25

3.63


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select   Structural

2.4

3.84

4.43

4.96

4.70

5.42

6.06

5.45

6.29

7.03


 

3.0

3.43

3.97

4.43

4.20

4.85

5.42

4.87

5.63

6.29


 

3.6

3.14

3.62

4.05

3.83

4.43

4.95

4.45

5.14

5.74


 

4.2

2.90

3.35

3.75

3.55

4.10

4.58

4.12

4.76

5.32


 

4.8

2.72

3.14

3.51

3.31

3.83

4.29

3.72

4.45

4.97


 

5.4

2.53

2.96

3.31

3.00

3.61

4.04

3.37

4.19

4.69


 

6.0

2.31

2.80

3.14

2.74

3.43

3.83

3.09

3.93

4.45


No. 1 and    No. 2

2.4

3.25

3.75

4.19

3.97

4.59

5.13

4.61

5.32

5.95


 

 

3.0

2.90

3.35

3.75

3.55

4.10

4.59

4.12

4.76

5.32


 

 

3.6

2.65

3.06

3.42

3.24

3.74

4.19

3.76

4.34

4.86


 

 

4.2

2.45

2.83

3.17

3.00

3.47

3.88

3.48

4.02

4.50


 

 

4.8

2.30

2.65

2.96

2.81

3.24

3.63

3.26

3.76

4.21


 

 

5.4

2.17

2.50

2.80

2.65

3.06

3.42

3.07

3.55

3.97


 

 

6.0

2.05

2.37

2.65

2.51

2.90

3.24

2.91

3.37

3.76


Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)

Select   Structural

2.4

3.08

3.55

3.97

3.76

4.35

4.86

4.37

5.04

5.64


 

3.0

2.75

3.18

3.55

3.37

3.89

4.35

3.91

4.51

5.04


 

3.6

2.51

2.90

3.24

3.07

3.55

3.97

3.57

4.12

4.60


 

4.2

2.33

2.69

3.00

2.85

3.29

3.67

3.30

3.81

4.26


 

4.8

2.18

2.51

2.81

2.66

3.07

3.44

3.09

3.57

3.99


 

5.4

2.05

2.37

2.65

2.51

2.90

3.24

2.91

3.36

3.76


 

6.0

1.95

2.25

2.51

2.38

2.75

3.07

2.76

3.19

3.57


No. 1 and   No. 2

2.4

2.61

3.01

3.36

3.19

3.68

4.11

3.70

4.27

4.77


 

 

3.0

2.33

2.69

3.01

2.85

3.29

3.68

3.31

3.82

4.27


 

 

3.6

2.13

2.46

2.75

2.60

3.00

3.36

3.02

3.49

3.90


 

 

4.2

1.97

2.27

2.54

2.41

2.78

3.11

2.80

3.23

3.61


 

 

4.8

1.84

2.13

2.38

2.25

2.60

2.91

2.61

3.02

3.38


 

 

5.4

1.74

2.01

2.24

2.12

2.45

2.74

2.47

2.85

3.18


 

 

6.0

1.65

1.90

2.13

2.02

2.33

2.60

2.34

2.70

3.02


Column 1

2

3

4

5

6

7

8

9

10

11

12 Notes to Table A-8: (1)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.6.3. (2)Spans are clear spans between supports. For total span, add two bearing lengths. (3)Provide minimum 89 mm of bearing. (4)Supported length means half the sum of the joists spans on both sides of the beam. (5)Straight line interpolation may be used for other supported lengths. Table A-9 Maximum Spans for Built-up Floor Beams Supporting not more than Two Floors(1) Forming Part of Sentence 9.23.4.2.(3)  Commercial Designation

Grade

Supported   Length,   mm(4)(5)

Maximum Span, m(2) (3)


Size of Built-up Beam, mm


3 -

4 -

5 -

3 -

4 -

5 -

3 -

4 -

5 -


 

 

 

38 x

38 x

38 x

38 x

38 x

38 x

38 x

38 x

38 x


 

 

 

184

184

184

235

235

235

286

286

286


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select   Structural

2.4

2.91

3.36

3.76

3.56

4.11

4.60

4.13

4.77

5.34


 

3.0

2.61

3.01

3.36

3.19

3.68

4.11

3.70

4.27

4.77


 

3.6

2.38

2.75

3.07

2.87

3.36

3.76

3.23

3.90

4.36


 

4.2

2.13

2.54

2.84

2.53

3.11

3.48

2.85

3.61

4.04


 

4.8

1.91

2.38

2.66

2.27

2.87

3.25

2.56

3.23

3.77


 

5.4

1.74

2.19

2.51

2.07

2.60

3.07

2.34

2.93

3.52


 

6.0

1.60

2.01

2.38

1.91

2.39

2.87

2.17

2.70

3.23


No. 1 and    No. 2

2.4

2.27

2.62

2.93

2.77

3.20

3.58

3.22

3.72

4.16


 

 

3.0

2.03

2.34

2.62

2.48

2.86

3.20

2.88

3.32

3.72


 

 

3.6

1.85

2.14

2.39

2.26

2.62

2.92

2.63

3.03

3.39


 

 

4.2

1.71

1.98

2.21

2.10

2.42

2.71

2.43

2.81

3.14


 

 

4.8

1.60

1.85

2.07

1.96

2.26

2.53

2.28

2.63

2.94


 

 

5.4

1.51

1.75

1.95

1.85

2.14

2.39

2.15

2.48

2.77


 

 

6.0

1.43

1.66

1.85

1.75

2.03

2.26

2.04

2.35

2.63


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select    Structural

2.4

2.87

3.31

3.70

3.42

4.05

4.53

3.83

4.70

5.26


 

3.0

2.38

2.96

3.31

2.83

3.61

4.05

3.18

4.05

4.70


 

3.6

2.05

2.61

3.02

2.43

3.09

3.70

2.75

3.47

4.19


 

4.2

1.81

2.29

2.77

2.15

2.72

3.28

2.44

3.06

3.68


 

4.8

1.63

2.05

2.47

1.94

2.43

2.93

2.20

2.75

3.29


 

5.4

1.49

1.86

2.23

1.78

2.22

2.65

2.02

2.50

2.99


 

6.0

1.37

1.71

2.05

1.65

2.04

2.43

1.88

2.31

2.75


No. 1 and    No. 2

2.4

2.38

2.75

3.07

2.91

3.36

3.76

3.38

3.90

4.36


 

 

3.0

2.13

2.46

2.75

2.60

3.00

3.36

3.02

3.49

3.90


 

 

3.6

1.94

2.24

2.51

2.38

2.74

3.07

2.75

3.18

3.56


 

 

4.2

1.80

2.08

2.32

2.15

2.54

2.84

2.44

2.95

3.29


 

 

4.8

1.63

1.94

2.17

1.94

2.38

2.66

2.20

2.75

3.08


 

 

5.4

1.49

1.83

2.05

1.78

2.22

2.50

2.02

2.50

2.91


 

 

6.0

1.37

1.71

1.94

1.65

2.04

2.38

1.88

2.31

2.75


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select   Structural

2.4

2.91

3.36

3.76

3.56

4.11

4.60

4.13

4.77

5.34


 

3.0

2.61

3.01

3.36

3.09

3.68

4.11

3.47

4.27

4.77


 

3.6

2.23

2.75

3.07

2.65

3.36

3.76

2.99

3.79

4.36


 

4.2

1.97

2.50

2.84

2.34

2.96

3.48

2.64

3.33

4.02


 

4.8

1.77

2.23

2.66

2.11

2.65

3.20

2.38

2.99

3.59


 

5.4

1.61

2.03

2.44

1.93

2.41

2.90

2.18

2.72

3.26


 

6.0

1.49

1.86

2.23

1.78

2.22

2.65

2.02

2.50

2.99


No. 1 and    No. 2

2.4

2.46

2.85

3.18

3.01

3.48

3.89

3.50

4.04

4.51


 

 

3.0

2.20

2.55

2.85

2.70

3.11

3.48

3.13

3.61

4.04


 

 

3.6

2.01

2.32

2.60

2.46

2.84

3.18

2.85

3.30

3.69


 

 

4.2

1.86

2.15

2.40

2.28

2.63

2.94

2.64

3.05

3.41


 

 

4.8

1.74

2.01

2.25

2.11

2.46

2.75

2.38

2.85

3.19


 

 

5.4

1.61

1.90

2.12

1.93

2.32

2.59

2.18

2.69

3.01


 

 

6.0

1.49

1.80

2.01

1.78

2.20

2.46

2.02

2.50

2.85


Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules)

Select Structural

2.4

2.34

2.70

3.02

2.86

3.30

3.69

3.31

3.83

4.28


 

3.0

2.09

2.41

2.70

2.55

2.95

3.30

2.96

3.42

3.83


 

3.6

1.91

2.20

2.46

2.33

2.69

3.01

2.71

3.12

3.49


 

4.2

1.77

2.04

2.28

2.15

2.49

2.79

2.44

2.89

3.23


 

4.8

1.63

1.91

2.13

1.94

2.33

2.61

2.20

2.71

3.03


 

5.4

1.49

1.80

2.01

1.78

2.20

2.46

2.02

2.50

2.85


 

6.0

1.37

1.71

1.91

1.65

2.04

2.33

1.88

2.31

2.71


No. 1 and    No.2

2.4

1.98

2.28

2.55

2.42

2.79

3.12

2.81

3.24

3.62


 

 

3.0

1.77

2.04

2.28

2.16

2.50

2.79

2.51

2.90

3.24


 

 

3.6

1.61

1.86

2.08

1.97

2.28

2.55

2.29

2.65

2.96


 

 

4.2

1.49

1.73

1.93

1.83

2.11

2.36

2.12

2.45

2.74


 

 

4.8

1.40

1.61

1.81

1.71

1.97

2.21

1.98

2.29

2.56


 

 

5.4

1.32

1.52

1.70

1.61

1.86

2.08

1.87

2.16

2.42


 

 

6.0

1.25

1.44

1.61

1.53

1.77

1.97

1.77

2.05

2.29


Column 1

2

3

4

5

6

7

8

9

10

11

12 Notes to Table A-9: (1)Spans apply only where the floors serve residential areas as described in Table 4.1.6.A., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.6.A. (2)Spans are clear spans between supports. For total span, add two bearing lengths. (3)Provide minimum 89 mm of bearing. (4)Supported length means half the sum of the joists spans on both sides of the beam. (5)Straight line interpolation may be used for other supported lengths. Table A-10 Maximum Spans for Built-up Floor Beams Supporting not more than Three Floors(1) Forming Part of Sentence 9.23.4.2.(3)  Commercial Designation

Grade

Supported   Length,   mm(4)(5)

Maximum Span, m(2)(3)


Size of Built-up Beam, mm


3-

4-

5-

3-

4-

5-

3-

4-

5-


 

 

 

38 x

38 x

38 x

38 x

38 x

38 x

38 x

38 x

38 x


 

 

 

184

184

184

235

235

235

286

286

286


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

Select   Structural

2.4

2.44

2.82

3.15

2.99

3.45

3.85

3.37

4.00

4.47


 

3.0

2.10

2.52

2.82

2.49

3.08

3.45

2.81

3.56

4.00


 

3.6

1.81

2.29

2.57

2.16

2.72

3.15

2.44

3.06

3.65


 

4.2

1.60

2.01

2.38

1.92

2.40

2.88

2.17

2.70

3.24


 

4.8

1.45

1.81

2.17

1.73

2.16

2.58

1.97

2.44

2.90


 

5.4

1.33

1.65

1.97

1.59

1.97

2.34

1.82

2.23

2.64


 

6.0

1.23

1.52

1.81

1.48

1.82

2.16

1.69

2.06

2.44


No. 1 and    No. 2

2.4

1.90

2.19

2.45

2.32

2.68

3.00

2.70

3.11

3.48


 

 

3.0

1.70

1.96

2.19

2.08

2.40

2.68

2.41

2.79

3.11


 

 

3.6

1.55

1.79

2.00

1.90

2.19

2.45

2.20

2.54

2.84


 

 

4.2

1.44

1.66

1.86

1.76

2.03

2.27

2.04

2.35

2.63


 

 

4.8

1.34

1.55

1.74

1.64

1.90

2.12

1.91

2.20

2.46


 

 

5.4

1.27

1.46

1.64

1.55

1.79

2.00

1.80

2.08

2.32


 

 

6.0

1.20

1.39

1.55

1.47

1.70

1.90

1.69

1.97

2.20


Hem – Fir (includes Western Hemlock and Amabilis Fir)

Select   Structural

2.4

2.14

2.72

3.10

2.54

3.23

3.80

2.86

3.62

4.39


 

3.0

1.78

2.25

2.72

2.13

2.68

3.23

2.40

3.01

3.62


 

3.6

1.55

1.94

2.33

1.85

2.31

2.77

2.10

2.61

3.12


 

4.2

1.38

1.71

2.05

1.65

2.05

2.44

1.88

2.32

2.75


 

4.8

1.25

1.55

1.84

1.50

1.85

2.19

1.72

2.10

2.48


 

5.4

1.15

1.42

1.68

1.39

1.70

2.00

1.59

1.93

2.27


 

6.0

1.07

1.31

1.55

1.30

1.57

1.85

1.49

1.79

2.10


No. 1 and    No. 2

2.4

1.99

2.30

2.57

2.44

2.81

3.15

2.83

3.27

3.65


 

 

3.0

1.78

2.06

2.30

2.13

2.52

2.81

2.40

2.92

3.27


 

 

3.6

1.55

1.88

2.10

1.85

2.30

2.57

2.10

2.61

2.98


 

 

4.2

1.38

1.71

1.95

1.65

2.05

2.38

1.88

2.32

2.75


 

 

4.8

1.25

1.55

1.82

1.50

1.85

2.19

1.72

2.10

2.48


 

 

5.4

1.15

1.42

1.68

1.39

1.70

2.00

1.59

1.93

2.27


 

 

6.0

1.07

1.31

1.55

1.30

1.57

1.85

1.49

1.79

2.10


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

Select   Structural

2.4

2.33

2.82

3.15

2.77

3.45

3.85

3.12

3.96

4.47


 

3.0

1.94

2.46

2.82

2.31

2.92

3.45

2.61

3.29

3.96


 

3.6

1.68

2.11

2.55

2.00

2.51

3.02

2.27

2.83

3.40


 

4.2

1.49

1.86

2.24

1.78

2.22

2.66

2.03

2.51

2.99


 

4.8

1.35

1.68

2.00

1.62

2.00

2.39

1.84

2.27

2.69


 

5.4

1.24

1.53

1.82

1.49

1.83

2.17

1.70

2.08

2.46


 

6.0

1.15

1.42

1.68

1.39

1.70

2.00

1.59

1.93

2.27


No. 1 and    No. 2

2.4

2.06

2.38

2.67

2.52

2.92

3.26

2.93

3.38

3.78


 

 

3.0

1.85

2.13

2.38

2.26

2.61

2.92

2.61

3.03

3.38


 

 

3.6

1.68

1.95

2.18

2.00

2.38

2.66

2.27

2.76

3.09


 

 

4.2

1.49

1.80

2.02

1.78

2.20

2.46

2.03

2.51

2.86


 

 

4.8

1.35

1.68

1.88

1.62

2.00

2.30

1.84

2.27

2.67


 

 

5.4

1.24

1.53

1.78

1.49

1.83

2.17

1.70

2.08

2.46


 

 

6.0

1.15

1.42

1.68

1.39

1.70

2.00

1.59

1.93

2.27


Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)

Select   Structural

2.4

1.96

2.26

2.53

2.39

2.76

3.09

2.78

3.21

3.58


 

3.0

1.75

2.02

2.26

3.13

2.47

2.76

2.40

2.87

3.21


 

3.6

1.55

1.85

2.06

1.85

2.26

2.52

2.10

2.61

2.93


 

4.2

1.38

1.71

1.91

1.65

2.05

2.34

1.88

2.32

2.71


 

4.8

1.25

1.55

1.79

1.50

1.85

2.18

1.72

2.10

2.48


 

5.4

1.15

1.42

1.68

1.39

1.70

2.00

1.59

1.93

2.27


 

6.0

1.07

1.31

1.55

1.30

1.57

1.85

1.49

1.79

2.10


No. 1 and   No. 2

2.4

1.66

1.91

2.14

2.03

2.34

2.62

2.35

2.72

3.04


 

 

3.0

1.48

1.71

1.91

1.81

2.09

2.34

2.10

2.43

2.72


 

 

3.6

1.35

1.56

1.75

1.65

1.91

2.14

1.92

2.22

2.48


 

 

4.2

1.25

1.45

1.62

1.53

1.77

1.98

1.78

2.05

2.29


 

 

4.8

1.17

1.35

1.51

1.43

1.65

1.85

1.66

1.92

2.15


 

 

5.4

1.10

1.28

1.43

1.35

1.56

1.74

1.57

1.81

2.02


 

 

6.0

1.05

1.21

1.35

1.28

1.48

1.65

1.49

1.72

1.92


Column 1

2

3

4

5

6

7

8

9

10

11

12 Notes to Table A-10: (1)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floors does not exceed that specified for residential areas as described in Table 4.1.6.3. (2)Spans are clear spans between supports. For total span, add two bearing lengths. (3)Provide minimum 89 mm of bearing. (4)Supported length means half the sum of the joists spans on both sides of the beam. (5)Straight line interpolation may be used for other supported lengths. Table A-11 Maximum Spans for Glue-Laminated Floor Beams — 20f-E Grade(1) Forming Part of Sentence 9.23.4.2.(3)  Number of Storeys Supported

Beam   Width,   mm

Supported   Length,   m(6)(7)

Maximum Span, m(2) (3) (4) (5)


Beam Depth, mm


228

266

304

342

380

418

456


1

80

2.4

4.32

5.04

5.76

6.48

7.20

7.92

8.64


 

3.0

3.87

4.51

5.15

5.80

6.44

7.09

7.73


 

3.6

3.53

4.12

4.70

5.29

5.88

6.47

7.06


 

4.2

3.27

3.81

4.36

4.90

5.44

5.99

6.53


 

4.8

3.06

3.57

4.07

4.58

5.09

5.60

6.11


 

5.4

2.88

3.36

3.84

4.32

4.80

5.28

5.76


 

6.0

2.73

3.19

3.64

4.10

4.56

5.01

5.47


130

2.4

5.51

6.43

7.35

8.26

9.18

10.10

11.02


 

 

3.0

4.93

5.75

6.57

7.39

8.21

9.03

9.86


 

 

3.6

4.50

5.25

6.00

6.75

7.50

8.25

9.00


 

 

4.2

4.16

4.86

5.55

6.25

6.94

7.64

8.33


 

 

4.8

3.90

4.54

5.19

5.84

6.49

7.14

7.79


 

 

5.4

3.67

4.28

4.90

5.51

6.12

6.73

7.35


 

 

6.0

3.48

4.07

4.65

5.23

5.81

6.39

6.97


2

80

2.4

3.28

3.83

4.37

4.92

5.47

6.01

6.56


 

3.0

2.93

3.42

3.91

4.40

4.89

5.38

5.87


 

3.6

2.68

3.12

3.57

4.02

4.46

4.91

5.36


 

4.2

2.48

2.89

3.31

3.72

4.13

4.54

4.96


 

4.8

2.32

2.71

3.09

3.48

3.86

4.25

4.64


 

5.4

2.19

2.55

2.91

3.28

3.64

4.01

4.37


 

6.0

2.07

2.42

2.77

3.11

3.46

3.80

4.15


130

2.4

4.18

4.88

5.57

6.27

6.97

7.66

8.36


 

 

3.0

3.74

4.36

4.99

5.61

6.23

6.85

7.48


 

 

3.6

3.41

3.98

4.55

5.12

5.69

6.26

6.83


 

 

4.2

3.16

3.69

4.21

4.74

5.27

5.79

6.32


 

 

4.8

2.96

3.45

3.94

4.43

4.93

5.42

5.91


 

 

5.4

2.79

3.25

3.72

4.18

4.64

5.11

5.57


 

 

6.0

2.64

3.08

3.53

3.97

4.41

4.85

5.29


3

80

2.4

2.75

3.21

3.66

4.12

4.58

5.04

5.50


 

3.0

2.46

2.87

3.28

3.69

4.10

4.51

4.92


 

3.6

2.24

2.62

2.99

3.37

3.74

4.11

4.49


 

4.2

2.08

2.42

2.77

3.12

3.46

3.81

4.15


 

4.8

1.94

2.27

2.59

2.91

3.24

3.56

3.89


 

5.4

1.83

2.14

2.44

2.75

3.05

3.36

3.66


 

6.0

1.74

2.03

2.32

2.61

2.90

3.19

3.48


130

2.4

3.50

4.09

4.67

5.25

5.84

6.42

7.01


 

 

3.0

3.13

3.66

4.18

4.70

5.22

5.74

6.27


 

 

3.6

2.86

3.34

3.81

4.29

4.77

5.24

5.72


 

 

4.2

2.65

3.09

3.53

3.97

4.41

4.85

5.30


 

 

4.8

2.48

2.89

3.30

3.72

4.13

4.54

4.95


 

 

5.4

2.34

2.72

3.11

3.50

3.89

4.28

4.67


 

 

6.0

2.22

2.58

2.95

3.32

3.69

4.06

4.43


Column 1

2

3

4

5

6

7

8

9

10 Notes to Table A-11: (1)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. (2 )Spans are valid for glued-laminated timber conforming to CAN/CSA-O122-M and CAN/CSA-O177-M. (3)Spans are clear spans between supports. For total span, add two bearing lengths. (4)Provide a minimum bearing length of 89 mm. (Alternatively, the bearing length may be designed in accordance with Part 4.) (5)Top edge of beam assumed to be fully laterally supported by joists. (6)Supported length means half the sum of the joist spans on both sides of the beam. (7)Straight line interpolation may be used for other supported lengths. Table A-12 Maximum Spans for Built-up Roof Ridge Beams — No. 1 or No. 2 Grade Forming Part of Sentence 9.23.4.2.(4)  Commercial Designation

Beam Size,   mm

Maximum Span, m(1) (2)


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


Douglas Fir – Larch (includes Douglas Fir and Western Larch)

3 – 38 x 184

2.42

2.08

1.86

1.69

1.56


 

4 – 38 x 184

2.80

2.41

2.14

1.95

1.80


 

5 – 38 x 184

3.13

2.69

2.40

2.18

2.01


 

3 – 38 x 235

2.95

2.55

2.27

2.06

1.91


 

4 – 38 x 235

3.42

2.94

2.62

2.38

2.20


 

5 – 38 x 235

3.83

3.29

2.93

2.67

2.46


 

3 – 38 x 286

3.44

2.96

2.63

2.40

2.21


 

4 – 38 x 286

3.97

3.41

3.04

2.77

2.56


 

5 – 38 x 286

4.44

3.82

3.40

3.09

2.86


Hem – Fir (includes Western Hemlock and Amabilis Fir)

3 – 38 x 184

2.54

2.18

1.95

1.77

1.64


 

4 – 38 x 184

2.93

2.52

2.25

2.05

1.89


 

5 – 38 x 184

3.28

2.82

2.51

2.29

2.11


 

3 – 38 x 235

3.11

2.67

2.38

2.17

2.00


 

4 – 38 x 235

3.59

3.08

2.75

2.50

2.31


 

5 – 38 x 235

4.01

3.45

3.07

2.80

2.58


 

3 – 38 x 286

3.61

3.10

2.76

2.51

2.32


 

4 – 38 x 286

4.16

3.58

3.19

2.90

2.68


 

5 – 38 x 286

4.66

4.00

3.56

3.24

3.00


Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)

3 – 38 x 184

2.63

2.26

2.02

1.83

1.69


 

4 – 38 x 184

3.04

2.61

2.33

2.12

1.96


 

5 – 38 x 184

3.40

2.92

2.60

2.37

2.19


 

3 – 38 x 235

3.22

2.77

2.46

2.24

2.07


 

4 – 38 x 235

3.72

3.20

2.85

2.59

2.39


 

5 – 38 x 235

4.16

3.57

3.18

2.90

2.68


 

3 – 38 x 286

3.73

3.21

2.86

2.60

2.40


 

4 – 38 x 286

4.31

3.71

3.30

3.01

2.78


 

5 – 38 x 286

4.82

4.15

3.69

3.36

3.10


Northern Species (includes any Canadian species covered by the NLGA Standard Grading Rules)

3 – 38 x 184

2.11

1.82

1.62

1.47

1.36


 

4 – 38 x 184

2.44

2.10

1.87

1.70

1.57


 

5 – 38 x 184

2.73

2.34

2.08

1.90

1.76


 

3 – 38 x 235

2.58

2.22

1.98

1.80

1.66


 

4 – 38 x 235

2.98

2.56

2.28

2.08

1.92


 

5 – 38 x 235

3.33

2.87

2.55

2.32

2.15


 

3 – 38 x 286

3.00

2.58

2.29

2.09

1.93


 

4 – 38 x 286

3.46

2.98

2.65

2.41

2.23


 

5 – 38 x 286

3.87

3.33

2.96

2.70

2.49


Column 1

2

3

4

5

6

7 Notes to Table A-12: (1)The spans are calculated based on a maximum supported length of 4.9 m where supported length means half the sum of the rafter, joist or truss span on both sides of the beam. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. (2)Provide minimum 89 mm bearing. Table A-13 Maximum Spans for Douglas Fir – Larch Lintels — No. 1 or No. 2 Grade Non-Structural Sheathing Forming Part of Sentences 9.23.12.3.(1) and (3)  Lintel Supporting

Lintel Size,
mm(4)

Maximum Span, m(1) (2) (3)


Exterior Walls

Interior
Walls


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

2 – 38 x 89

 

1.25


 

2 – 38 x 140

 

1.78


Limited attic storage and ceiling

2 – 38 x 184

This Area Intentionally Left Blank

2.17


 

2 – 38 x 235

 

2.65


 

2 – 38 x 286

 

3.08


 

2 – 38 x 89

1.25

1.07

0.96

0.87

0.80

0.87


 

2 – 38 x 140

1.78

1.53

1.36

1.24

1.15

1.24


Roof and ceiling only

2 – 38 x 184

2.17

1.86

1.66

1.51

1.40

1.51


 

2 – 38 x 235

2.65

2.28

2.03

1.85

1.71

1.85


 

2 – 38 x 286

3.08

2.64

2.35

2.14

1.98

2.14


 

2 – 38 x 89

0.96

0.88

0.82

0.77

0.73

0.68


 

2 – 38 x 140

1.37

1.26

1.17

1.10

1.04

0.97


Roof, ceiling and 1 storey(5)

2 – 38 x 184

1.67

1.53

1.42

1.34

1.26

1.18


 

2 – 38 x 235

2.04

1.88

1.74

1.63

1.54

1.44


 

2 – 38 x 286

2.37

2.18

2.02

1.90

1.79

1.67


 

2 – 38 x 89

0.86

0.81

0.77

0.73

0.70

0.61


 

2 – 38 x 140

1.23

1.16

1.09

1.04

0.99

0.87


Roof, ceiling and 2 storeys(5)

2 – 38 x 184

1.50

1.41

1.33

1.27

1.21

1.06


 

2 – 38 x 235

1.84

1.72

1.63

1.55

1.48

1.30


 

2 – 38 x 286

2.13

2.00

1.89

1.80

1.72

1.51


 

2 – 38 x 89

0.81

0.77

0.73

0.71

0.68

0.57


 

2 – 38 x 140

1.15

1.10

1.05

1.01

0.97

0.82


Roof, ceiling and 3 storeys(5)

2 – 38 x 184

1.40

1.33

1.28

1.22

1.18

1.00


 

2 – 38 x 235

1.71

1.63

1.56

1.50

1.44

1.22


 

2 – 38 x 286

1.99

1.89

1.81

1.74

1.67

1.41


Column 1

2

3

4

5

6

7

8 Notes to Table A-13: (1)Spans are calculated based on a maximum supported joist or rafter length of 4.9 m and a maximum supported truss length of 9.8 m. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. Supported length means half the span of the longest supported member. (2) If floor joists span the full width of the building without support, lintel spans shall be reduced by 15% for Roof, ceiling and one storey, by 20% for Roof, ceiling and two storeys, and by 25% for Roof, ceiling and three storeys. (3) For ends of lintels fully supported by the wall, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm or bearing for lintel spans greater than 3 m. (4)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (5)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. Table A-14 Maximum Spans for Douglas Fir – Larch Lintels — No. 1 or No. 2 Grade Structural Sheathing(1) Forming Part of Sentences 9.23.12.3.(1) and (3)  Lintel Supporting

Lintel Size,   mm(5)

Maximum Span, m(2)(3)(4)


Exterior Walls


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

2 – 38 x 89

1.46

1.25

1.12

1.02

0.94


 

2 – 38 x 140

2.08

1.79

1.59

1.45

1.34


Roof and ceiling only

2 – 38 x 184

2.53

2.18

1.94

1.76

1.63


 

2 – 38 x 235

3.09

2.66

2.37

2.16

1.99


 

2 – 38 x 286

3.59

3.09

2.75

2.50

2.31


 

2 – 38 x 89

1.12

1.03

0.96

0.90

0.85


 

2 – 38 x 140

1.60

1.47

1.37

1.28

1.21


Roof, ceiling and 1 storey(6)

2 – 38 x 184

1.95

1.79

1.66

1.56

1.47


 

2 – 38 x 235

2.39

2.19

2.03

1.91

1.80


 

2 – 38 x 286

2.77

2.54

2.36

2.21

2.09


 

2 – 38 x 89

1.01

0.95

0.90

0.85

0.81


 

2 – 38 x 140

1.44

1.35

1.28

1.21

1.16


Roof, ceiling and 2 storeys(6)

2 – 38 x 184

1.75

1.64

1.55

1.48

1.41


 

2 – 38 x 235

2.14

2.01

1.90

1.81

1.73


 

2 – 38 x 286

2.49

2.33

2.21

2.10

2.00


 

2 – 38 x 89

0.94

0.90

0.86

0.82

0.79


 

2 – 38 x 140

1.35

1.28

1.22

1.18

1.13


Roof, ceiling and 3 storeys(6)

2 – 38 x 184

1.64

1.56

1.49

1.43

1.38


 

2 – 38 x 235

2.00

1.91

1.82

1.75

1.68


 

2 – 38 x 286

2.32

2.21

2.11

2.03

1.95


Column 1

2

3

4

5

6

7 Notes to Table A-14: (1)A minimum 9.5 mm thick structural panel conforming to CSA O121-M, CSA O151-M, CAN/CSA-O325.0 or CAN/CSA-O437.0 shall be fastened with at least 2 rows of fasteners conforming to Table 9.23.3.5 to the exterior face of the lintel, and a single row to the top plates and studs. (2)Spans are calculated based on a maximum supported joist or rafter length of 4.9 m and a maximum supported truss length of 9.8 m. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. Supported length means half the span of the longest supported members. (3)If floor joists span the full width of the building without support, lintels spans shall be reduced by 15% for Roof, ceiling and 1 storey, by 20% for Roof, ceiling and 2 storeys, and by 25% for Roof, ceiling and three storeys. (4)For ends of lintels fully supported by walls, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm of bearing for lintel spans greater than 3 m. (5)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (6)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. Table A-15 Maximum Spans for Hem – Fir Lintels — No. 1 or No. 2 Grade — Non-Structural Sheathing Forming Part of Sentences 9.23.12.3.(1) and (3)  Lintel Supporting

Lintel Size, mm (4)

Maximum Span, m(1) (2) (3)


Exterior Walls

Interior Walls


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

2 – 38 x 89

 

1.31


 

2 – 38 x 140

 

1.87


Limited attic storage and ceiling

2 – 38 x 184

This Area Intentionally Left Blank

2.27


 

2 – 38 x 235

 

2.78


 

2 – 38 x 286

 

3.23


 

2 – 38 x 89

1.31

1.13

1.00

0.91

0.84

0.91


 

2 – 38 x 140

1.87

1.61

1.43

1.30

1.20

1.30


Roof and ceiling only

2 – 38 x 184

2.27

1.95

1.74

1.58

1.42

1.58


 

2 – 38 x 235

2.78

2.39

2.13

1.92

1.71

1.92


 

2 – 38 x 286

3.23

2.77

2.47

2.17

1.94

2.17


 

2 – 38 x 89

1.01

0.93

0.86

0.81

0.76

0.69


 

2 – 38 x 140

1.44

1.32

1.23

1.14

1.05

0.95


Roof, ceiling and 1 storey(5)

2 – 38 x 184

1.75

1.61

1.47

1.34

1.23

1.12


 

2 – 38 x 235

2.14

1.96

1.76

1.60

1.48

1.35


 

2 – 38 x 286

2.49

2.22

2.00

1.82

1.69

1.55


 

2 – 38 x 89

0.91

0.85

0.80

0.76

0.72

0.60


 

2 – 38 x 140

1.29

1.21

1.13

1.05

0.98

0.82


Roof, ceiling and 2 storeys(5)

2 – 38 x 184

1.57

1.44

1.33

1.24

1.16

0.98


 

2 – 38 x 235

1.90

1.73

1.60

1.49

1.40

1.19


 

2 – 38 x 286

2.15

1.97

1.82

1.70

1.60

1.37


 

2 – 38 x 89

0.85

0.81

0.77

0.74

0.69

0.55


 

2 – 38 x 140

1.21

1.14

1.06

1.00

0.95

0.76


Roof, ceiling and 3 storeys(5)

2 – 38 x 184

1.43

1.33

1.25

1.18

1.12

0.91


 

2 – 38 x 235

1.72

1.60

1.50

1.42

1.35

1.10


 

2 – 38 x 286

1.95

1.82

1.72

1.63

1.55

1.27


Column 1

2

3

4

5

6

7

8 Notes to Table A-15: (1)Spans are calculated based on a maximum supported joist or rafter length of 4.9 m and a maximum supported truss length of 9.8 m. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. Supported length means half the span of the longest supported member. (2)If floor joists span the full width of the building without support, lintels spans shall be reduced by 15% for Roof, ceiling and 1 storey, by 20% for Roof, ceiling and 2 storeys, and by 25% for Roof, ceiling and 3 storeys. (3)For ends of lintels fully supported by walls, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm of bearing for lintel spans greater than 3 m. (4)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (5)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. Table A-16 Maximum Spans for Hem – Fir Lintels — No. 1 or No. 2 Grade — Structural Sheathing(1) Forming Part of Sentences 9.23.12.3.(1) and (3)  Lintel Supporting

Lintel Size mm,(5)

Maximum Span, m(2) (3) (4)


Exterior Walls


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

2 – 38 x 89

1.47

1.29

1.17

1.07

0.98


 

2 – 38 x 140

2.18

1.88

1.67

1.52

1.40


Roof and ceiling only

2 – 38 x 184

2.65

2.28

2.03

1.85

1.71


 

2 – 38 x 235

3.25

2.79

2.49

2.26

2.08


 

2 – 38 x 286

3.77

3.24

2.88

2.62

2.35


 

2 – 38 x 89

1.18

1.08

1.00

0.94

0.89


 

2 – 38 x 140

1.68

1.54

1.43

1.34

1.27


Roof, ceiling and 1 storey(6)

2 – 38 x 184

2.05

1.88

1.74

1.63

1.49


 

2 – 38 x 235

2.50

2.30

2.13

1.94

1.78


 

2 – 38 x 286

2.91

2.66

2.42

2.20

2.03


 

2 – 38 x 89

1.06

0.99

0.94

0.89

0.85


 

2 – 38 x 140

1.51

1.42

1.34

1.27

1.19


Roof, ceiling and 2 storeys(6)

2 – 38 x 184

1.84

1.73

1.62

1.50

1.40


 

2 – 38 x 235

2.25

2.11

1.93

1.79

1.68


 

2 – 38 x 286

2.61

2.38

2.19

2.03

1.91


 

2 – 38 x 89

0.99

0.94

0.90

0.86

0.83


 

2 – 38 x 140

1.41

1.34

1.28

1.22

1.15


Roof, ceiling and 3 storeys(6)

2 – 38 x 184

1.72

1.62

1.52

1.43

1.35


 

2 – 38 x 235

2.09

1.94

1.81

1.71

1.62


 

2 – 38 x 286

2.37

2.20

2.06

1.94

1.84


Column 1

2

3

4

5

6

7 Notes to Table A-16: (1)A minimum 9.5 mm thick structural panel conforming to CSA O121-M, CSA O151-M, CAN/CSA-O325.0 or CAN/CSA-O437.0 shall be fastened with at least 2 rows of fasteners conforming to Table 9.23.3.5 to the exterior face of the lintel, and a single row to the top plates and studs. (2)Spans are calculated based on a maximum supported joist or rafter length of 4.9 m and a maximum supported truss length of 9.8 m. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. Supported length means half the span of the longest supported member. (3)If floor joists span the full width of the building without support, lintels spans shall be reduced by 15% for Roof, ceiling and 1 storey, by 20% for Roof, ceiling and 2 storeys, and by 25% for Roof, ceiling and 3 storeys. (4)For ends of lintels fully supported by walls, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm of bearing for lintel spans greater than 3 m. (5)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (6)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. Table A-17 Maximum Spans for Spruce – Pine – Fir Lintels — No. 1 or No. 2 Grade Non-Structural Sheathing Forming Part of Sentences 9.23.12.3.(1) and (3)  Lintel Supporting

Lintel Size, mm (4)

Maximum Span, m(1) (2) (3)


Exterior Walls

Interior
Walls


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

2 – 38 x 89

 

1.27


 

2 – 38 x 140

 

1.99


Limited attic storage and ceiling

2 – 38 x 184

This Area Intentionally Left Blank

2.51


 

2 – 38 x 235

 

3.07


 

2 – 38 x 286

 

3.57


 

2 – 38 x 89

1.27

1.11

1.01

0.93

0.87

0.93


 

2 – 38 x 140

1.93

1.66

1.48

1.35

1.25

1.35


Roof and ceiling only

2 – 38 x 184

2.35

2.02

1.80

1.64

1.52

1.64


 

2 – 38 x 235

2.88

2.47

2.20

2.01

1.84

2.01


 

2 – 38 x 286

3.34

2.87

2.56

2.33

2.09

2.33


 

2 – 38 x 89

1.05

0.96

0.89

0.84

0.79

0.74


 

2 – 38 x 140

1.49

1.37

1.27

1.19

1.13

1.02


Roof, ceiling and 1 storey(5)

2 – 38 x 184

1.82

1.67

1.55

1.44

1.33

1.20


 

2 – 38 x 235

2.22

2.04

1.89

1.73

1.59

1.45


 

2 – 38 x 286

2.58

2.36

2.15

1.96

1.81

1.66


 

2 – 38 x 89

0.94

0.88

0.83

0.79

0.76

0.64


 

2 – 38 x 140

1.34

1.26

1.19

1.13

1.06

0.88


Roof, ceiling and 2 storeys(5)

2 – 38 x 184

1.63

1.53

1.44

1.33

1.25

1.05


 

2 – 38 x 235

1.99

1.87

1.72

1.60

1.50

1.27


 

2 – 38 x 286

2.31

2.12

1.96

1.82

1.71

1.45


 

2 – 38 x 89

0.88

0.83

0.80

0.77

0.74

0.59


 

2 – 38 x 140

1.25

1.19

1.14

1.08

1.02

0.81


Roof, ceiling and 3 storeys(5)

2 – 38 x 184

1.52

1.44

1.35

1.27

1.21

0.97


 

2 – 38 x 235

1.86

1.73

1.62

1.53

1.45

1.17


 

2 – 38 x 286

2.11

1.96

1.84

1.74

1.66

1.35


Column 1

2

3

4

5

6

7

8 Notes to Table A-17: (1)Spans are calculated based on a maximum supported joist or rafter length of 4.9 m and a maximum supported truss length of 9.8 m. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. Supported length means half the span of the longest supported member. (2)If floor joists span the full width of the building without support, lintels spans shall be reduced by 15% for Roof, ceiling and 1 storey, by 20% for Roof, ceiling and 2 storeys, and by 25% for Roof, ceiling and 3 storeys. (3)For ends of lintels fully supported by walls, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm or bearing for lintel spans greater than 3 m. (4)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (5)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in table 4.1.6.3. Table A-18 Maximum Spans for Spruce – Pine – Fir Lintels — No. 1 or No. 2 Grade Structural Sheathing(1) Forming Part of Sentences 9.23.12.3.(1) and (3)  Lintel Supporting

Lintel Size, mm (5)

Maximum Span, m(2) (3) (4)


Exterior Walls


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

2 – 38 x 89

1.40

1.23

1.11

1.03

0.97


 

2 – 38 x 140

2.21

1.93

1.73

1.57

1.45


Roof and ceiling only

2 – 38 x 184

2.75

2.36

2.10

1.92

1.77


 

2 – 38 x 235

3.36

2.89

2.57

2.34

2.16


 

2 – 38 x 286

3.90

3.35

2.99

2.72

2.51


 

2 – 38 x 89

1.16

1.08

1.01

0.96

0.92


 

2 – 38 x 140

1.74

1.60

1.48

1.39

1.32


Roof, ceiling and 1 storey(6)

2 – 38 x 184

2.12

1.95

1.81

1.69

1.60


 

2 – 38 x 235

2.59

2.38

2.21

2.07

1.93


 

2 – 38 x 286

3.01

2.76

2.56

2.38

2.19


 

2 – 38 x 89

1.09

1.03

0.97

0.92

0.88


 

2 – 38 x 140

1.56

1.47

1.39

1.32

1.26


Roof, ceiling and 2 storeys(6)

2 – 38 x 184

1.90

1.79

1.69

1.61

1.51


 

2 – 38 x 235

2.33

2.19

2.07

1.94

1.81


 

2 – 38 x 286

2.70

2.54

2.37

2.20

2.05


 

2 – 38 x 89

1.02

0.97

0.93

0.89

0.86


 

2 – 38 x 140

1.46

1.39

1.33

1.28

1.23


Roof, ceiling and 3 storeys(6)

2 – 38 x 184

1.78

1.69

1.62

1.54

1.46


 

2 – 38 x 235

2.17

2.07

1.96

1.84

1.74


 

2 – 38 x 286

2.52

2.38

2.22

2.09

1.98


Column 1

2

3

4

5

6

7 Notes to Table A-18: (1)A minimum 9.5 mm thick structural panel conforming to CSA O121-M, CSA O151-M, CAN/CSA-O325.0 or CAN/CSA-O437.0 shall be fastened with at least 2 rows of fasteners conforming to Table 9.23.3.5 to the exterior face of the lintel, and a single row to the top plates and studs. (2)Spans are calculated based on a maximum supported joist or rafter length of 4.9 m and a maximum supported truss length of 9.8 m. Spans may be increased by 5% for supported lengths not more than 4.3 m, or by 10% for supported lengths not more than 3.7 m. Supported length means half the span of the longest supported member. (3)If roof joists span the full width of the building without support, lintels spans shall be reduced by 15% for roof, ceiling and one storey, by 20% for roof, ceiling and two storeys, and by 25% for roof, ceiling and three storeys. (4)For ends of lintels fully supported by walls, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm of bearing for lintel spans greater than 3 m. (5)A single piece of 89 mm thick lumber may be used in lieu of 2 pieces of 38 mm thick lumber on edge. (6)Spans apply only where the floors serve residential areas as described in Table 4.1.6.3., or the uniformly distributed live load on the floor does not exceed that specified for residential areas as described in Table 4.1.6.3. Table A-19 Maximum Spans for Built-up Lintels — Roof and Ceiling Load Only — No. 1 or No. 2 Grade Forming Part of Sentences 9.23.12.3.(1) and (3)  Commercial Designation

Lintel Size, mm

Maximum Span, m(1) (2)


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


 

3 – 38 x 184

2.76

2.38

2.12

1.93

1.78


 

4 – 38 x 184

3.19

2.74

2.44

2.22

2.05


Douglas Fir – Larch (includes Douglas Fir and 

5 – 38 x 184

3.57

3.07

2.73

2.49

2.30


Western larch)

3 – 38 x 235

3.38

2.90

2.59

2.35

2.18


 

4 – 38 x 235

3.90

3.35

2.99

2.72

2.51


 

5 – 38 x 235

4.36

3.75

3.34

3.04

2.81


 

3 – 38 x 286

3.92

3.37

3.00

2.73

2.52


 

4 – 38 x 286

4.53

3.89

3.47

3.15

2.91


 

5 – 38 x 286

5.06

4.35

3.87

3.53

3.26


 

3 – 38 x 184

2.90

2.49

2.22

2.02

1.87


 

4 – 38 x 184

3.35

2.88

2.56

2.33

2.15


 

5 – 38 x 184

3.73

3.22

2.86

2.61

2.41


Hem – Fir (includes Western

3 – 38 x 235

3.54

3.05

2.71

2.47

2.28


Hemlock and Amabilis Fir)

4 – 38 x 235

4.09

3.52

3.13

2.85

2.63


 

5 – 38 x 235

4.57

3.93

3.50

3.19

2.95


 

3 – 38 x 286

4.11

3.53

3.15

2.87

2.62


 

4 – 38 x 286

4.75

4.08

3.63

3.31

3.06


 

5 – 38 x 286

5.31

4.56

4.06

3.70

3.42


 

3 – 38 x 184

3.00

2.58

2.30

2.09

1.93


 

4 – 38 x 184

3.30

2.88

2.62

2.42

2.23


 

5 – 38 x 184

3.55

3.10

2.82

2.62

2.46


Spruce – Pine – Fir (includes Spruce (all species

3 – 38 x 235

3.67

3.15

2.81

2.56

2.36


except Coast Sitka Spruce),

4 – 38 x 235

4.21

3.64

3.24

2.95

2.73


Jack Pine, Lodgepole Pine, Balsam Fir and

5 – 38 x 235

4.54

3.96

3.60

3.30

3.05


Alpine Fir)

3 – 38 x 286

4.26

3.66

3.26

2.97

2.74


 

4 – 38 x 286

4.92

4.23

3.76

3.43

3.17


 

5 – 38 x 286

5.49

4.73

4.21

3.83

3.54


Column 1

2

3

4

5

6

7 Notes to Table A-19: (1)Spans are calculated based on a maximum supported length of 4.9 m. Spans may be increased by 15% for supported lengths not more than 3.7 m, or by 35% for supported lengths not more than 2.4 m. Supported length means half span of the trusses, roof joists or rafters supported by the lintel plus the length of the overhang beyond the lintel. (2)For ends of lintels fully supported by the wall, provide minimum 38 mm of bearing for lintel spans up to 3 m, or minimum 76 mm of bearing for lintel spans greater than 3 m. Table A-20 Maximum Spans for Glued-Laminated Timber Lintels    20f-E Stress Grade — Exterior Walls — Roof and Ceiling Load Only Forming part of Sentences 9.23.12.3.(1) and (3)  Lintel Size, mm

Maximum Span, m(1) (2) (3)


Specified Snow Load, kPa


1.0

1.5

2.0

2.5

3.0


Supported length   m(4) (5)

Supported length   m(4) (5)

Supported length   m(4) (5)

Supported length   m(4) (5)

Supported length   m(4) (5)


2.4

3.6

4.8

2.4

3.6

4.8

2.4

3.6

4.8

2.4

3.6

4.8

2.4

3.6

4.8


130 x 304

6.23

5.63

5.24

5.63

5.09

4.73

5.24

4.73

4.40

4.95

4.48

4.17

4.73

4.28

3.87


80 x 380

6.52

5.89

5.48

5.89

5.32

4.96

5.48

4.96

4.52

5.19

4.69

4.11

4.96

4.39

3.80


130 x 342

6.80

6.15

5.72

6.15

5.56

5.17

5.72

5.17

4.81

5.41

4.89

4.55

5.17

4.67

4.35


80 x 418

7.00

6.33

5.89

6.33

5.72

5.32

5.89

5.32

4.96

5.57

5.03

4.52

5.32

4.81

4.18


130 x 380

7.36

6.65

6.19

6.65

6.01

5.59

6.19

5.59

5.21

5.86

5.29

4.92

5.59

5.06

4.70


80 x 456

7.48

6.76

6.29

6.76

6.10

5.68

6.29

5.68

5.29

5.95

5.37

4.93

5.68

5.13

4.56


130 x 418

7.91

7.15

6.65

7.15

6.46

6.01

6.65

6.01

5.59

6.29

5.68

5.29

6.01

5.43

5.05


80 x 494

7.94

7.17

6.68

7.17

6.48

6.03

6.68

6.03

5.61

6.31

5.71

5.31

6.03

5.45

4.94


80 x 532

8.39

7.58

7.06

7.58

6.85

6.38

7.06

6.38

5.93

6.67

6.03

5.61

6.38

5.76

5.32


130 x 456

8.44

7.63

7.10

7.63

6.89

6.41

7.10

6.41

5.97

6.71

6.07

5.65

6.41

5.80

5.39


Column 1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16 Notes to Table A-20: (1)Spans are valid for glued-laminated timber conforming to CAN/CSA-O122-M and CAN/CSA-O177-M. (2)Provide minimum 89 mm bearing. (Alternatively, the bearing length may be calculated in accordance with Part 4.) (3)Top edge of lintel assumed to be fully laterally supported. (4)Supported length means half the length of trusses or rafters, plus the length of overhang beyond the wall. (5)For intermediate supported lengths, straight line interpolation may be used. O. Reg. 403/97, Part 9; O. Reg. 22/98, ss. 19-31; O. Reg. 278/99, ss. 19-26; O. Reg. 593/99, s. ; O. Reg. 597/99, s. 1; O. Reg. 283/01, s. 5; O. Reg. 23/04, s. 5; O. Reg. 349/06, ss. 22, 23. PART 10   CHANGE OF USE  Section

10.1.

General


 

10.1.1.

Scope


 

 

 


Section

10.2.

Classification of Existing Buildings


 

10.2.1.

Classification


 

 

 


Section

10.3.

Requirements


 

10.3.1.

General


 

10.3.2.

Performance Level


 

 

 


Section

10.4.

Compliance Alternatives And Alternative Measures


 

10.4.1.

Compliance Alternatives


 

10.4.2.

Alternative Measures PART 10   CHANGE OF USE Section 10.1.General 10.1.1.Scope