Load Tables

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Section Uniform Load (kN/m²) at Joist Spacing (mm)
Without Acoustic Overlay With Acoustic Overlay
Dead / Live Dead / Live Dead / Live Dead / Live Dead / Live Dead / Live Dead / Live Dead / Live
0.50 / 1.50 0.75 / 1.50 0.50 / 3.00 0.75 / 5.00 1.00 / 1.50 1.25 / 1.50 1.00 / 2.00 1.00 / 3.00
400 600 400 600 400 600 400 600 400 600 400 600 400 600 400 600
150M12 3.64 3.53 3.64 3.40 3.25 2.24 2.04 1.36 3.65 3.24 3.50 2.97 3.53 2.68 2.98 1.98
150M15 3.86 3.80 3.86 3.66 3.50 2.84 2.59 1.73 3.87 3.49 3.70 3.34 3.79 3.33 3.46 2.52
150M20 4.17 4.10 4.17 3.96 3.85 3.36 3.25 2.76 4.15 3.75 3.97 3.59 4.07 3.66 3.80 3.32
200M12 4.36 4.29 4.36 4.12 4.07 3.51 3.36 2.31 4.32 3.91 4.14 3.74 4.24 3.83 4.02 3.31
200M15 4.76 4.68 4.76 4.46 4.53 3.95 3.82 2.87 4.68 4.23 4.48 4.05 4.60 4.15 4.45 3.91
200M20 5.16 5.07 5.16 4.81 5.00 4.36 4.21 3.68 5.04 4.56 4.82 4.36 4.95 4.47 4.79 4.31
250M16 5.66 5.56 5.66 5.22 5.57 4.78 4.36 2.90 5.47 4.94 5.24 4.73 5.37 4.85 5.20 4.24
250M20 6.03 5.89 6.03 5.50 5.89 5.23 5.05 4.23 5.77 5.22 5.53 4.99 5.67 5.12 5.48 4.95
300M20 6.76 6.45 6.67 6.03 6.59 5.90 5.70 4.23 6.32 5.71 6.05 5.47 6.21 5.61 6.00 5.42
300M29 7.81 7.09 7.33 6.63 7.25 6.55 6.35 4.23 6.95 6.28 6.65 6.01 6.82 6.17 6.06 5.96

Maximum spans in above Joist load tables based on:

  1. Unfactored dead and live loads.
  2. Imposed load deflection limited to span/450.
  3. Dead + Imposed load deflection limited to span/350.
  4. Blocking and strapping at mid span for spans < 6.0m. For spans over 6.0m blocking and strapping required at max 3.0m spacing.
  5. Floor joists boarded with minimum 15mm plywood for joists at 400mm centres or 18mm plywood for joists at 600mm centres.
  6. Boarding fixed to the joists at maximum 300mm centres.
  7. Joists fixed into 2.0mm gauge tracks at each end.

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