Bringing Stand-Up Shower through Tight Spaces

I bought a used stand-up shower for my place with the hopes of putting it in the basement. I realized that it was going to be tight to bring it into my basement, but luckily was a three peice so I thought I'd be good to go. Amongst bringing it down the stairs, I realized that it was to large to fit.

So that brings me to thinking that I could grap a circular saw and cut it in half and then patch it up when I put it together. Or I could either put a strap on it and pinch it together which might damage the material but not as much as cutting it, as it is like a C shape box with the ends out.

Thanks for your help,
Carl

shower

Don't even think about cutting it and then putting it back together and not have it leak. It sounds like this is just the wall section, so if closing it into a triangle will get it down the stairs it should not damage the unit if you do not over do it.