DMF International announced the inclusion of a specialised door able to accommodate 18m high x 18m wide openings. With special design additions, even larger openings can be accommodated.
The fold up door is an automated door, with opening speeds of up to 1m/sec, and works similarly to that of a roman blind. Being so large, wind resistance is of high importance in the design, and these fold up doors can tolerate high winds due to high strength wind bars.
For larger doors, the panels are dual skin, and wind bars are actually small trusses with high bending strength, and therefore providing substantial wind resistance. Normal safety controls are standard on the fold up door.