Considering the many different types of rapid door, CAMPISA recommends an initial analysis of the specific needs to go ahead with the first important decision
- Horizontal opening high speed doors: have the advantage of opening faster, as the door opens in two halves that travel one to the right and one to the left. They present the problem of having to keep the sheet taut from the top, so they need a right angled metal structure on each side, a solution that brings complications for components and increased costs. The side obstructions are always sizeable. If then the structure that keeps the sheet taut is knocked in transit, problems and significant costs arise.
- Vertical opening rapid doors: offer the advantage of opening and closing vertically, without large side obstructions. Vertical opening rapid doors divide into two main categories, flexible leaf doors and fixed leaf , which are much more expensive and the wise choice only in cases where the opening is very high and narrow (such as the transit of forklift trucks in very high warehouses).
In most cases CAMPISA recommends flexible leaf rapid doors, in the various models:
- Vertical rapid roll doors: the leaf is reinforced to withstand the wind with horizontal tubes inserted into pockets in the sheet. They are supplied for wind resistance on request. They are suitable for openings up to 4–5m in width and 6–7m in height. They have a window section at a height of around 1.5m, but can have more windowed sections where greater visibility or light is needed.
- Vertical rapid folding doors: the leaf is reinforced to withstand the wind with horizontal tubes inserted into pockets in the sheet. They are supplied for wind resistance on request. They are suitable for openings up to 8–9m in width and 6–8m in height.
- They have a window section at a height of around 1.5m, but can have more windowed sections where greater visibility or light is needed. The wind resistance of folding doors can be increased so they withstand winds of up to 200km/h.
- Vertical rapid roll self-repairing doors: the leaf is fixed laterally with a system similar to a zip fastening that unfastens if it encounters an obstacle on the descent. The wind resistance comes directly from the sheet that stays taut between two jambs.
They are supplied for specific wind resistance based on the dimensions. They are suitable for openings up to 4m in width and 5–6m in height.They have a window section around 1.5m high, but can have more windowed sections where greater visibility or light is needed.
From a safety point of view, if the flexible leaf rapid doors are used with the dead man’s command, no safety is required (as long as the operator has perfect visibility of the door).
The biggest advantage of a rapid door is that the opening closes quickly after transit, for which CAMPISA recommends automatic manoeuvre rapid doors, in which the door automatically closes after the set waiting time and after the safety photocells are free. CAMPISA recommends setting the minimum waiting time for closure given that in any case the door closes only when the photocells are free (setting the waiting time for an extended number of seconds makes the moment of reclosure uncertain, which misleads users into thinking that they can pass because “it is not time for the door to close yet”, then bump into the door).
Automatic rapid doors are required by regulation, to have a safety system , generally known as the “safety edge”, a system for detecting the presence of an obstacle placed on the lower edge of the sheet. Thanks to this safety device, as soon as the rapid door touches an obstacle it immediately stops, then immediately starts to open and then close again after the set waiting time.
CAMPISA notes that this system is excellent, but it protects only the person under the door. It therefore recommends seeking to safeguard the door from possible collision, because a truck trying to cross the doorway during closure will hit the sheet without the safety edge being able to come into operation. CAMPISA advises preparing photoelectric safety cells placed a certain distance from the rapid door even in the case of self-repairing rapid doors as they have limited ability to self-repair.
Lastly, an important factor for rapid doors is the door open command system. CAMPISA recommends the use of remote controls that provide assurance of opening, in advance of the passage. CAMPISA solutions for giving the door open command can be photoelectric cells, radar or magnetic coils.