A 145 × 50 mm straight-grain WPC decking board, co-extruded in one piece from wood-plastic composite. At 50 mm it is the highest load-rated profile in the range — and section depth is what buys stiffness. Because bending stiffness rises sharply with section height, the same span deflects less and carries more, which means joists can be set considerably further apart at the same load requirement, taking real material and labour cost out of the sub-structure. The 145 × 50 is the answer for extreme load cases: maximum strength, minimum lifetime maintenance.