If you're familiar with the "Gorilla" brand of shelving you know that it's a
steel framework on which (IIRC)MDF shelves are placed. I have a site in my
shop where I need something like this, but only have 42" of room and Gorilla
units -- and everything comparable -- is sold in even foot widths. I'd like
to take a Gorilla unit and cut the transverse pieces to 42" length but that
seems like an awful lot of backbreaking work with a hacksaw. What power
tools might be suitable for doing this? (I'm especially interested in
something I might be able to conveniently rent for a few hours and only have
a sedan to haul it in).

TIA
Norm