In general terms, the designs of the buildings are goverened by the sizes of the roof trusses.
We are able to supply & fit buildings up to 7m deep quite comfortably as these trusses fit inside our 7.5 tonnes curtainside lorries. Based on these trusses, we can accommodate buildings up to 20m x 7m. (Please contact us if you need a wider version as we will need to include partitions) 

We have erected larger buildings, the largest having 10m trusses, however these buildings require  posts to support the trusses - please contact for for more details.