I am looking to build a raised bed. As it has to be wheelchair
accesabile (at present son can garden fron a sitting/kneeling on the
soil position, but I have to have one eye on the future) am looking at
24" wide and 26" deep (by say 4'long).

Does anyone have any links to plans/sites or gotchas that I should look
out for? The weight of that amount of soil is the first thing I think
off, and the wood being in soil contact in all weathers is another.
I am no gardener but DIY holds no fears for me (money is tight though).