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A big opening eats standard high speed doors twice. Buy a conventional roll-up model for a wide exterior wall and the first real storm can push the middle of the curtain out of its guides. The door then sits dead until a technician arrives. Go taller instead, and the coil barrel that stores the curtain swells until the roof steel simply has no room left for it.<\/p>\n

Our factory has engineered industrial doors since 1999, and the current high speed range runs 21 models with curtain speeds from 0.8 to 2.5 m\/s. We build roll-up, folding and stacking doors side by side. Our published stacking door data covers openings above 10,000 mm wide and 8,000 mm high at a Class 3 wind rating. This page explains what high speed PVC stacking doors are, how the stacking mechanism differs from coiling and folding, and where each structure earns its keep.<\/p>\n

How a PVC Stacking High Speed Door Works<\/h2>\n

A high speed stacking door<\/a> stores its curtain overhead in flat folds rather than around a barrel. High-tensile lifting belts anchored to the bottom edge pull the curtain upward, and horizontal wind bars locked into curtain pockets keep each section straight as it rises. The sections fold over one another and stack in a compact pack above the header, which is how the design reaches widths and heights that defeat coiling curtains.<\/p>\n

Drive duty comes from a servo motor with a frequency converter, so acceleration stays smooth across a curtain that can weigh several hundred kilograms. On our stacking line the curtain opens at up to 1.5 m\/s and closes at up to 1.0 m\/s, both adjustable in the PLC controller. Safety hardware follows EN 12453, with force limiting plus photoelectric sensors and optional light curtains across the threshold. The selection view ends where the movement begins: how a high speed stacking door works<\/a>, step by step from signal to seated fold pack.<\/p>\n

\n\"Technician
Stacked sections between wind bars are what a stacking door is made of, assembled section by section before the belts ever lift one.<\/figcaption><\/figure>\n

Three Ways to Store a Door Curtain<\/h2>\n

Every flexible high speed door solves the same problem: where does the curtain go when the door is open? High speed PVC stacking doors answer it with an overhead fold pack, coiling doors answer it with a barrel, and the roll-up comparison turns on exactly this storage step<\/a>. The storage choice decides headroom, side room and wind rating all at once.<\/p>\n\n\n\n\n\n
Storage mechanism<\/th>\nOpen position<\/th>\nWhat grows as the door gets bigger<\/th>\nNatural habitat<\/th>\n<\/tr>\n
Coiling (roll-up)<\/td>\nWrapped around a barrel<\/td>\nBarrel diameter, so headroom demand climbs with door height<\/td>\nInternal traffic doors up to large single spans<\/td>\n<\/tr>\n
Folding<\/td>\nHorizontal folds pushed to the sides<\/td>\nSide room beside the opening<\/td>\nWide internal openings with spare wall<\/td>\n<\/tr>\n
Stacking<\/td>\nVertical folds stacked above the header<\/td>\nAlmost nothing: the pack depth is set by fold count, not door height<\/td>\nLarge, wind-exposed, high-cycle openings<\/td>\n<\/tr>\n<\/table>\n

The stacking pack deserves the geometric point spelled out. A coiling curtain adds one wrap of thickness per revolution, so the barrel diameter and its headroom requirement grow with every meter of extra door height. A stacking curtain is divided into a chosen number of folds instead. The finished pack height follows the fold count and curtain thickness, so it stays close to constant even as the door climbs toward eight meters.<\/p>\n

Wind Bars Carry the Load to the Guides<\/h2>\n

Wind resistance on a soft curtain is a load-path story. Pressure on the curtain face passes into the horizontal bars. The bars pass it into the side guides, and the guides pass it into the building steel through welded or heavy-anchor fixings. That chain is what lets a PVC curtain hold a large span flat in a gust instead of billowing out of the tracks.<\/p>\n

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Watch the wind class arithmetic<\/p>\n

EN 12424 grades wind resistance from Class 0 to Class 5, and Class 3 corresponds to 700 N\/m². At least one supplier card advertises a “Class 8” stacking door, a level the standard does not define. Ask any bidder for the test pressure in N\/m² and the test report, not the class number alone.<\/p>\n<\/div>\n

Our stacking doors are rated Class 3 (700 N\/m²) under EN 12424, which covers most semi-sheltered and exposed industrial walls, and reinforced builds exist for harsher coastal sites. The curtain itself is typically 0.8 to 1.2 mm high-density PVC with UV stabilisers. The grade is chosen for the site as part of the curtain materials<\/a> specification rather than as an afterthought.<\/p>\n

Opening Sizes Other High Speed Doors Refuse<\/h2>\n

Coverage is why plants accept a slower stacking door. Standard roll-up curtains fight the sail effect as spans grow, while rigid doors get heavy and slow at extreme sizes. Openings beyond roughly six meters wide or tall start eliminating candidates fast. That is exactly the range where high speed PVC stacking doors live, engineered between 6 and 20 meters wide across mining plants, shipyard booths and aircraft hangars.<\/p>\n

\n\"Wide
Wide exterior walls are where the stacking structure justifies itself: span first, then speed.<\/figcaption><\/figure>\n

Our own engineering envelope runs past 10,000 mm in width and 8,000 mm in height on a single custom curtain, one door at a time with no minimum order quantity. Each project is checked against the real wind zone, traffic pattern and activation method. The deployments behind those checks read like a tour of stacking door applications<\/a>, from coastal ports to inland workshops.<\/p>\n

Activation choices follow the traffic, not the catalog. Radar sensors suit mixed forklift and pedestrian lanes that cannot wait for a button. Induction loops handle truck routes where metal arrival is the signal, and push buttons or remotes fit supervised openings. Specify the wrong trigger and a fast curtain still feels slow, because the door spends its day waiting for permission instead of moving.<\/p>\n

The Headroom and Side Room Trade-Off<\/h2>\n

Among industrial doors, stacking models trade barrel diameter for a different spatial bill. The fold pack above the header needs clear headroom, sized with the fold count. The guides also run deeper than roll-up tracks because the bars travel inside them. None of it is enormous, but it is structural. Retrofitting the envelope after the walls are up is the painful version of this decision.<\/p>\n