Table 4B.11: Maximum clear span of rafters

Table 4B.11 Maximum clear span of rafters (m); Roof pitch more than 15° but not more than 22.5°; Imposed load of 0.75 kN/m2; Timber strength class C16 C16. Dead Load [kN/m2] excluding the self weight of the rafter. Size of rafter (mm): 38 x 100, 38 x 125, 38 x 150, 47 x 100, 47 x 125, 47 x 150, 50 x 100, 50 x 125, 50 x 150, 38 x 89, 38 x 140, CLS/ALS. Spacing of rafters: 400, 450, 600 mm. Dead loads: 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 kN/m2. Maximum clear spans provided in the table in metres.