Posted: 28/05/2013 at 21:34
Honestly, I've been there where you just wish you'd thought of something before you did what you'd percieved as the way forward! The easiest way around the whole step 'problem' is to fashion a ramp that takes the path to level with the step. The longer you make the ramp, the less angle it will be. I find I tend to hit the step on the way in, as opposed to on the way out. Greenhouses are very exacting things, if you want them to stay up, they have to be level, and they have to be square, otherwise the glass won't fit, or they run into problems after a year or two. It really is totally worth taking twice as long to start with, because then you don't have to worry about stability etc in the future.
Cutting the frame full stop is plain madness. It is suprising I know that a GH derives it's strength from the base, but it is the rectangle that indeed maintains the vast majority of the stability. I have an aluminium base which when I was constructing was shaped like a banana and was bendy as hell. However having been inside during 20mph+ winds, the frame and the base act as 'suspension', it allows the GH to move a little, this is why cutting it in my book would be asking for trouble.
Anyways good luck mate, you'll be glad when it's all done and you're inside pottering about while it's hammering down outside. (just like me today!)