How to replace a board on a wooden ramp. I think it's decking. I used to work construction in the summer, but that never involved decks. The hand rails are set on a plate like studs on a wall on 24 inch centers (60 cm centers would be a close equivalent). Was on the way home, dreading finding the screws holding the handrail in place, then remembered how we repaired stud walls. I think we would have cut out a section of plate over the bad board; removed the screws that are under the plate and in the center; cut a new board to fit; drill pilot holes; screw down the board; then cut new plates to replace the cut-out sections.
At least, I think that's how we would have done it.
Intend to use pressure treated wood for the plate. Maybe decking is pressure treated. The reason I think the board is decking is that it's an odd dimension. It could have been 1 1/2 x 6 inches before dressing, Have seen 1 x 6 and 2 x 6, but never 1 1/2 x 6.
Also debating whether to chance a circular saw (which I have), or use a reciprocating saw (which I'd have to buy). We used both repairing stud walls.