They are made from steel sheets that are bolted together and sealed with plastic packing.
Using steel sheets from Japan and labor and manufacturing in Taiwan, Dynacorn sells its complete bodies for $13,995.
Some of the treehouses are more futuristic, like one built out of stainless steel sheets around a willow tree near the Spree River in Berlin.
Investigators have previously said that because of design flaws in the 40-year-old structure, several gusset plates, steel sheets that tie girders together, were too thin.
Starting in August 2005, the plant will manufacture panels for refrigeration rooms, made up of two steel sheets separated by a foam layer.
The bank's windows and doors are now behind a double layer of welded steel sheets which no amount of force is likely to remove.
At a far end of the plant, a new laser-beam device, the only significant recent capital expenditure, cuts steel sheets into parts of various shapes.
The steel sheets were used to make power hacksaw blades.
The UltraSTEEL® forming process forms plain steel sheets into dimpled steel sheets.
Company was founded in 1990 as the country's first producer of hot-rolled steel sheets.
