Notes to Table 9.32.3.10.A.:
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)  Column 1

Column 2

Column 3

Col. 4

Col. 5

Col. 6

Col. 7

Col. 8

Col. 9

Col. 10

Col. 11

Col. 12


Commercial Designation

Grade

Joist Size, mm

Maximum Span, m


With Strapping(2)

With Bridging

With Strapping(2) 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 

38 × 89

2.13

1.97

1.73

2.19

1.99

1.73

2.19

1.99

1.73


Structural

38 × 140

3.23

3.07

2.73

3.44

3.12

2.73

3.44

3.12

2.73


 

38 × 184

3.88

3.69

3.51

4.18

3.92

3.59

4.37

4.07

3.59


 

38 × 235

4.57

4.34

4.13

4.86

4.57

4.29

5.05

4.70

4.39


 

38 × 286

5.21

4.95

4.71

5.49

5.16

4.85

5.66

5.28

4.92


No. 1 

38 × 89

2.00

1.85

1.66

2.09

1.90

1.66

2.09

1.90

1.66


and No. 2

38 × 140

3.09

2.91

2.62

3.29

2.99

2.62

3.29

2.99

2.62


 

38 × 184

3.71

3.53

3.36

4.00

3.76

3.44

4.19

3.90

3.44


 

38 × 235

4.38

4.16

3.96

4.66

4.38

4.11

4.84

4.51

4.20


 

38 × 286

4.99

4.75

4.52

5.26

4.94

4.65

5.43

5.06

4.72


No. 3

38 × 89

1.90

1.69

1.38

1.95

1.69

1.38

1.95

1.69

1.38


 

38 × 140

2.78

2.41

1.97

2.78

2.41

1.97

2.78

2.41

1.97


 

38 × 184

3.38

2.93

2.39

3.38

2.93

2.39

3.38

2.93

2.39


 

38 × 235

4.14

3.58

2.93

4.14

3.58

2.93

4.14

3.58

2.93


 

38 × 286

4.80

4.16

3.39

4.80

4.16

3.39

4.80

4.16

3.39


Construction

38 × 89

1.90

1.77

1.61

2.03

1.84

1.61

2.03

1.84

1.61


Standard

38 × 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 

38 × 89

2.08

1.93

1.71

2.16

1.96

1.71

2.16

1.96

1.71


Structural

38 × 140

3.18

3.03

2.69

3.39

3.08

2.69

3.39

3.08

2.69


 

38 × 184

3.82

3.64

3.46

4.12

3.87

3.54

4.31

4.02

3.54


 

38 × 235

4.50

4.28

4.08

4.80

4.51

4.23

4.98

4.64

4.33


 

38 × 286

5.14

4.89

4.65

5.42

5.09

4.78

5.59

5.21

4.86


No. 1 and 

38 × 89

2.00

1.85

1.66

2.09

1.90

1.66

2.09

1.90

1.66


No. 2

38 × 140

3.09

2.91

2.62

3.29

2.99

2.62

3.29

2.99

2.62


 

38 × 184

3.71

3.53

3.36

4.00

3.76

3.44

4.19

3.90

3.44


 

38 × 235

4.38

4.16

3.96

4.66

4.38

4.11

4.84

4.51

4.20


 

38 × 286

4.99

4.75

4.52

5.26

4.94

4.65

5.43

5.06

4.72


No. 3

38 × 89

1.90

1.77

1.61

2.03

1.84

1.61

2.03

1.84

1.61


 

38 × 140

2.99

2.78

2.43

3.19

2.90

2.43

3.19

2.90

2.43


 

38 × 184

3.60

3.42

2.95

3.88

3.61

2.95

4.06

3.61

2.95


 

38 × 235

4.24

4.03

3.61

4.51

4.24

3.61

4.68

4.37

3.61


 

38 × 286

4.84

4.60

4.19

5.10

4.79

4.19

5.26

4.90

4.19


Construction

38 × 89

1.90

1.77

1.61

2.03

1.84

1.61

2.03

1.84

1.61


Standard

38 × 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 

38 × 89

1.95

1.81

1.64

2.06

1.87

1.64

2.06

1.87

1.64


Structural

38 × 140

3.05

2.85

2.57

3.24

2.95

2.57

3.24

2.95

2.57


 

38 × 184

3.66

3.48

3.31

3.94

3.70

3.38

4.12

3.84

3.38


 

38 × 235

4.31

4.10

3.90

4.59

4.31

4.05

4.76

4.44

4.14


 

38 × 286

4.91

4.67

4.45

5.18

4.87

4.57

5.34

4.98

4.64


No. 1 and 

38 × 89

1.86

1.72

1.58

1.99

1.81

1.58

1.99

1.81

1.58


No. 2

38 × 140

2.92

2.71

2.49

3.14

2.85

2.49

3.14

2.85

2.49


 

38 × 184

3.54

3.36

3.20

3.81

3.58

3.27

3.99

3.72

3.27


 

38 × 235

4.17

3.96

3.77

4.44

4.17

3.92

4.60

4.29

4.00


 

38 × 286

4.75

4.52

4.30

5.01

4.71

4.42

5.17

4.82

4.49


No. 3

38 × 89

1.81

1.68

1.55

1.96

1.78

1.55

1.96

1.78

1.55


 

38 × 140

2.84

2.64

2.43

3.08

2.80

2.43

3.08

2.80

2.43


 

38 × 184

3.47

3.30

2.95

3.74

3.52

2.95

3.92

3.61

2.95


 

38 × 235

4.09

3.89

3.61

4.36

4.09

3.61

4.52

4.22

3.61


 

38 × 286

4.67

4.44

4.19

4.92

4.62

4.19

5.08

4.73

4.19


Construction

38 × 89

1.81

1.68

1.55

1.96

1.78

1.55

1.96

1.78

1.55


Standard

38 × 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

38 × 89

1.65

1.53

1.42

1.84

1.68

1.46

1.84

1.68

1.46


Structural

38 × 140

2.59

2.41

2.24

2.90

2.63

2.30

2.90

2.63

2.30


 

38 × 184

3.27

3.11

2.94

3.52

3.31

3.03

3.69

3.44

3.03


 

38 × 235

3.85

3.66

3.48

4.10

3.85

3.62

4.26

3.97

3.70


 

38 × 286

4.39

4.18

3.97

4.63

4.35

4.09

4.78

4.45

4.15


No. 1 and

38 × 89

1.59

1.48

1.37

1.80

1.64

1.43

1.80

1.64

1.43


No. 2

38 × 140

2.51

2.33

2.16

2.83

2.57

2.25

2.83

2.57

2.25


 

38 × 184

3.19

3.04

2.84

3.44

3.23

2.96

3.60

3.36

2.96


 

38 × 235

3.76

3.58

3.41

4.01

3.77

3.54

4.16

3.88

3.62


 

38 × 286

4.29

4.08

3.88

4.53

4.25

4.00

4.67

4.35

4.06


No. 3

38 × 89

1.54

1.43

1.32

1.74

1.57

1.36

1.76

1.60

1.36


 

38 × 140

2.42

2.24 

1.94

2.74

2.38

1.94

2.75

2.38

1.94


 

38 × 184

3.12

2.90

2.37

3.35

2.90

2.37

3.35

2.90

2.37


 

38 × 235

3.67

3.49

2.89

3.91

3.54

2.89

4.06

3.54

2.89


 

38 × 286

4.19

3.98

3.36

4.42

4.11

3.36

4.55

4.11

3.36


Construction

38 × 89

1.54

1.43

1.32

1.74

1.57

1.40

1.76

1.60

1.40


Standard

38 × 89

1.48

1.37

1.15

1.63

1.41

1.15

1.63

1.41

1.15