Buying a metre of steel or a single short board is the awkward part of any small build. Full-length stock is priced and sold for people cutting whole lengths, so the moment you only need a short piece, the per-metre cost climbs and you end up with a rack of leftovers you did not plan for. Offcuts solve that, but only if you know where they come from and what to check before they go on the rack.
Where offcuts actually come from
Around Gauteng there are three broad sources. Fabrication shops clearing drops after a big job are the first, and they usually sell by weight or by the bundle rather than by the length. Timber yards selling shorts and seconds are the second, and these are the ones worth a phone call before you drive out, because what is on the floor changes week to week. Scrap yards and metal merchants round it out, though the grade there is often unknown, which is exactly why inspection matters.
What to bring, and what to check
A tape measure, a magnet, a moisture meter and a way to carry the load. For steel, a spark test against a grinder tells you more than the label on the rack: mild steel throws short, dull sparks, while a higher-carbon drop throws a longer, more branched burst. For hardwood, the moisture meter is the honest check. Boards that look sound on the outside can carry internal checking, and that only shows up once the piece is cut or the rack dries it further.
Storage and rust
Mixed offcuts rust faster than they should when they sit in a damp corner. Keep steel off the floor, separate it from green timber, and wipe a light oil film on anything that will sit for months. Hardwood wants airflow on all faces, not a tight stack against a wall.
If you are still setting up the bench itself, the notes on choosing a first benchtop drill press cover the specs that matter once the material is on the bench. Build logs and reader questions can go through the contact page.