Table 4B.15: Maximum clear span of rafters

Table 4B.15 Maximum clear span of rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load 1.00 kN/m2; Timber strength class C16 C16 Dead Load [kN/m2 ] excluding the self weight of the rafter Size of rafter (mm): Not more than 0.50 / More than 0.50 but not more than 0.75 / More than 0.75 but not more than 1.00 Spacing of rafters (mm): 400, 450, 600 (for each dead load category) 38 x 100 through 38 x 140 sizes (including CLS/ALS sections) with corresponding maximum clear spans in metres.