I tried to hollow it out as much as possible to cut down on weight, while still making sure it’s overbuilt enough to support the corner of a 2000 kg pickup truck. I’m planning to use 98 × 48 mm lumber.
Open to suggestions on how to improve it. My only concern is the stop block - it’s not any higher than the previous steps. I could make the tire sit deeper in that “well,” but that would reduce the overall height.
Chamfer the ramp block edges and widen the gap before the stop block, so that the energy required to overcome the stop block is greater than that to get up the ramp, and it’s more noticeable that you reached the top?