Wow, looking good Mike !
As far as the sagging shelf goes, I think running a spar across might indeed be the easiest and lightest option. A length of 1X2 screwed to the shelf would prevent it from sagging. I've done that with the shelves that hold my tools (3/8"OSB - 12"X48") and they don't sag between the brackets. If nothing else, you could put the strip on top of the shelf as a backsplash of sorts. With a foam shelf I think that would have to be a must if you can't tie it into the structure in mid-span.
Norm/mezmo wrote:...sip panels too. There is also a build on the
forum that used this method for his floor in his TD but I can't recall
That's on mine as well. I've got just the front triangular section done right now, but the increase in stiffness is pretty impressive. I went heavier on the bottom ply than I wanted to (3/8" rather than 1/4") but I'm calling it a success.
I agree that foam cabinets ought to have a skin on them for mechanical damage if nothing else. I haven't tried gluing up canvas on mine - do you guys think the foam would dent easily through the glued canvas during normal use ?
In boats, I have always been blown away by how much abuse the typical galley takes. Even hardwood countertops seem to get trashed pretty easily. I'm thinking ahead about using an aluminum sheet (24"flashing) to craft a range hood of sorts so that the heat from the stove doesn't melt the foam, even though it'll be about 3' above the cooktop. I may have lucked into a piece of 22ga stainless for the countertop. Installed over foam, it ought to be a light but tough surface. We'll see....