From the Metcalfe Website:
Now at last you can build your platforms to fit the track and not be restricted by standard set curves. All in one platforms or sectional separate units, the choice is yours. The box type structure with pre-cut components is both easy and pleasing to construct.
Pre-cut components build up in a box type structure to give rigid realistic platforms.
Kit contains enough components to build up to 7ft in length (based on an average platform width of 3 inches and 30% wastage).