These are types of doors that open vertically by folding up neatly and lay flat beneath the ceiling above or slab if there is another floor above. Depending on the type of roof, some industrial sectional doors can be designed in a way that they go up along the wall if there is enough head room, or also have a special railing that they can go up and along going by the design of the roof so that it is accommodated well. The purpose is usually to avoid using the space normally used by other types of doors that require more room so that they can open fully. Read more →