Deluks said:Surely it would be much quicker to knock up the framework on site??
You are looking at building it , transporting it, and then erecting it. Why the hassle when you can just work from a pile of timber, bag o' nails and bit of string. Plus it will use less timber as you won't have to have adjoining frames bolted together.
Who wants to spend time on site and have all the extra gear along, when you could take the assembled frames, bolt them together and have done with it?