Slate Crate Expectations

Over the last few months I have been given a number of hardwood crates in which flagstones and natural slate were delivered to local building projects. Hard and for the most part durable material, but very roughly green sawn so dimensionally all over the place!
Having broken the crates down and sawn the worst pieces up for firewood, I recently set to with a couple of projects. The first was to build some duckboards for winter gardening work; then I made a slatted floor for a small cabin (itself a reclaimed item) which I have been using as a log store but which could become an equipment room when I finally (!) get round to renewable energy projects.

The damp-proof spreaders are all reclaimed plastic from the beach.
Believe it or not, each slat had to be individually trimmed:
the cabin is GRP, but not built to such close tolerances as a yacht!
Many slats had to be rejected for being unacceptably wonky.