The tables are based on a total ‘Dead & Super’ imposed load of 1.50kN/m2, a line load of 2.00kN/m and a deflection limit of L/200. The factor of safety used is 1.5. Where actual design loads exceed these, the spans must be reduced. Subject to satisfactory fixings, the decks will resist wind uplift to at least the value of 1.50kN/m2, and a and a deflection limit of L/90.