Two opening principles

1. Side hung doors ( Sometimes known as the "Barn Door" style – are fixed to hinges on each side of the door opening, and are useful when there is a generous amount of space outside or inside the building.

They are available with motor-driven or manual operation. Motor operation is suitable when the doors are opened more than 10 times a day. Motor-driven side hung doors can have a top mounted motor (small doors) or side mounted motor (larger doors).

About 50 percent of all doors sold in the Swedish market are side-hung doors. Side hung doors can be subdivided into two types::

Folding doors
Each door is subdivided into three-six sections, which are opened by folding the sections together and pulling them sideways. Best suited to larger openings. The larger the opening, the more sections are used.

Side hinged doors 
An “ordinary” door opening with two side-hung “doors”. Best suited to smaller openings.

2. Sectional overhead doors– these are slid up on rails under the roof when opened, and suit both high utilisation rates in the building and where the maximum available opening is required.

About 40 percent of all doors sold in the Swedish market are sectional overhead doors. The door is provided with a motor so it can be opened without manual assistance. The door can be remote controlled by radio etc., or pull cord switch which is suitable when the door is opened frequently, such as in a goods handling terminal.

Sectional overhead doors are cheaper and easier to motorise than side-hung doors.

 Sectional overhead doors less than 15–20 m2 works great without power operation and operates manually with help from the torsions springs.

 

Folding doors (Ecolid, Lida)

                                                                                                                                   Side hinged doors (Ecolid, Lida)Sectional overhead doors (Prolid)

Two construction principles

A. Sandwich construction (Sandwich door) 

The load-bearing component in a sandwich door is formed by collaboration between the surface layer and the insulation. It is well insulated, and thus offers low operating costs and low overall economy.

 Sandwich doors are suitable where people work or move frequently, since it keeps the warmth in. The design principle gives it a higher finish, and is suitable where the appearance of the door is very important.

 Sandwich construction

B. Frame construction (Framed door) 

A welded and hot dip galvanized steel frame is the load-bearing element in framed doors. It is robust, and can withstand both an aggressive climate, and wear and tear.

Framed doors often used for really large openings, dimensions. Agricultural buildings, warehouse doors and machinery halls are examples of buildings where framed doors are used.

 Frame construction