Just wondering - having seen some reasonably priced beams - what the best method of cutting to speced size would be? Disk cutter, recip or are both too slow and best with oxy acytelyn torch or plasma cutter?
I've cut steel beams with a 9" electric grinder. It's noisy, fume ridden a lot of effort trying to hold on to a snatching blade and a nightmare for ruining trousers and bootlaces, other than that, easy.
Unless you're putting a LOT of steel in, metalwork is such a small part of the overall cost of the build that (IMHO) you're better off buying lintels or getting steel from somewhere that'll supply documentation.
If you wave reclaims at a structural engineer or building control they may start asking you what grade the metal is, has it been in a fire, demanding proof tests and other forms of expensive dicking about
But keep the grinder spinning at high speed and don't force it into the cut.. All it does is bog the grinder down, chew through discs faster and put you at risk of one grabbing/snatching and breaking..
..and when the thin ones explode, you don't want to be holding a grinder
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