Notes to Table 9.32.3.10.A.:
9.40.2.2. 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) Item   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 

                  305   406   610   305   406   610   305   406   610 

  1.   Douglas Fir – Larch (includes Douglas Fir and Western Larch)   Select Structural   38 × 89   2.13   1.97   1.73   2.19   1.99   1.73   2.19   1.99   1.73 

      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 and No. 2   38 × 89   2.00   1.85   1.66   2.09   1.90   1.66   2.09   1.90   1.66 

          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 

  2.   Hem – Fir (includes Western Hemlock and Amabilis Fir)   Select Structural   38 × 89   2.08   1.93   1.71   2.16   1.96   1.71   2.16   1.96   1.71 

      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 No. 2   38 × 89   2.00   1.85   1.66   2.09   1.90   1.66   2.09   1.90   1.66 

          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 

  3.   Spruce – Pine – Fir (includes Spruce (all species except Coast Sitka Spruce), Jack Pine, Lodgepole Pine, Balsam Fir and Alpine Fir)   Select Structural   38 × 89   1.95   1.81   1.64   2.06   1.87   1.64   2.06   1.87   1.64 

      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 No. 2   38 × 89   1.86   1.72   1.58   1.99   1.81   1.58   1.99   1.81   1.58 

          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 

  4.   Northern Species (includes any Canadian Species covered by the NLGA Standard Grading Rules)   Select Structural   38 × 89   1.65   1.53   1.42   1.84   1.68   1.46   1.84   1.68   1.46 

      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 No. 2   38 × 89   1.59   1.48   1.37   1.80   1.64   1.43   1.80   1.64   1.43 

          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