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Ball-impact resistance of ceilings — what the classes mean
Classes 1A, 2A and 3A from the EN 13964 standard correspond to three ball speeds: 16.5, 8 and 4 m/s. In most halls, class 2A is entirely sufficient for the ceiling, because the ceiling takes hits very differently from the wall behind the goal. We explain where this difference comes from and when 1A is still the right choice.
For designers and contractors working on sports halls, gyms and school corridors — and for clients comparing quotations.
In a sports hall, the ball hits the ceiling from time to time. A standard acoustic panel can then crack or pop out of the grid and fall. That is why, in sports facilities, it is not enough to write “acoustic ceiling” in the specification — you need to state the impact-resistance class.
The class is not an opinion voiced by the manufacturer; it is the result of a test: a machine fires a ball at the ceiling at a defined speed. The highest class is not always necessary, though. In a hall, the ceiling and the walls are exposed very differently: the hardest shots travel horizontally — into the goal and the wall behind it — not upward. That is why class 2A is entirely sufficient for the ceiling in most halls.
Three classes, three ball speeds
The EN 13964 standard (PN-EN 13964 in Poland) describes the impact-resistance test for suspended ceilings in Annex D and divides the results into three classes. What distinguishes them is the speed at which the ball hits the ceiling.
Przewiń w poziomie, aby zobaczyć wszystkie kolumny
The ceiling is not a wall: where the ball actually hits
Take indoor football or handball. The goals stand at the short walls of the hall, and shots on goal travel low and nearly horizontal. Whatever does not go into the goal hits the wall behind it — at full force and many times in a single training session. It is that wall, not the ceiling, that is the zone of the hardest hits in a hall.
The ball reaches the ceiling in a completely different way: after a clearance, a rebound, a save by the goalkeeper, or a high pass. It then flies upward, so it slows down with every metre, and it usually hits the panel at an angle, not head-on.
Wall behind the goal: direct shots at full speed. This is where the strongest protection is needed — class 1A wall panels or a net behind the goal.
Walls along the pitch: passes, clearances and rebounds — many hits, though usually weaker. Panels within reach of the ball also need an impact-resistance class.
Ceiling above the pitch: clearances, rebounds and high balls that have lost speed flying upward. In a typical hall, class 2A is enough here.
Do the math yourself: at what speed the ball reaches the ceiling
The energy of the ball grows with the square of its speed: at 16.5 m/s the ball carries (16.5 / 8.0)² ≈ 4.3 times more energy than at 8 m/s. That sounds alarming, but what matters for the ceiling is the speed at the moment of impact on the panel, not the speed at the moment of the shot.
A ball flying upward slows down. For it to hit the ceiling in an 8 m high hall at the class 1A test speed, it would have to be kicked straight up from the floor at roughly 20.7 m/s, i.e. about 75 km/h. In a real game, nobody kicks with full force straight up at the ceiling — hard shots go toward the goal. That is why class 2A is entirely sufficient for the ceiling in a typical hall.
Class 1A on the ceiling makes sense in two situations. First: the ceiling hangs low, for example in a small hall, and the ball can hit it directly before losing speed. Second: the client has written the German standard DIN 18032-3 into the specification. For ceiling elements it calls for 36 handball throws at 16.5 ± 0.8 m/s: 12 perpendicular and 12 each from two directions at a 60° angle. The element must not be damaged or come loose. That is the speed of class 1A.
What holds the panel in place
The class applies to the whole system — panel, grid and fixing method — not to the panel alone. The system datasheet states it for a specific installation layout. The same Ecophon Super G A panel is class 3A at 20 mm thickness and class 2A at 35 mm, each in its own layout.
In impact-resistant systems, the panels are held down with clips or cross tees so the ball cannot push them out of the grid. Within the Super G family, the Super G B and Super G Plus A variants are class 1A; the Super G B datasheet additionally confirms compliance with DIN 18032 part 3.
Light fittings, speakers and sensors in the ceiling weaken the system — the manufacturer says so explicitly in the datasheet. In a hall, they need to be chosen as impact-resistant components or shielded.
Najczęściej zadawane pytania
Which class should be specified for a school gym?
In most gyms — 2A. For a ceiling hanging a few metres above the pitch, that is entirely sufficient, including for indoor football and handball. Specify 1A when the ceiling hangs low or the specification requires DIN 18032-3. Pay more attention to the walls behind the goals — that is where the hardest shots land. 3A is for corridors, not sports halls.
Does indoor football need a class 1A ceiling?
Usually not. Shots in indoor football fly low, toward the goal, so the wall behind it takes the hardest hits. The ceiling is hit mainly by clearances and rebounds, which lose speed as they fly upward — 2A is enough here. The walls behind the goals, on the other hand, are worth protecting with class 1A panels or nets.
Does DIN 18032-3 apply in Poland?
It is not a Polish standard, but it often appears in hall specifications as an additional requirement. For the ceiling, it means a handball test at 16.5 m/s — the same speed as class 1A under EN 13964.
Does impact resistance mean worse acoustics?
Not necessarily. Glass-wool panels for sports halls achieve absorption class A — we explain exactly what that letter means in our article on the αw absorption class.
Źródła
- Ecophon — Impact resistance: classes 1A, 2A, 3A per EN 13964:2014 and impact speeds(otwiera się w nowej karcie)
- PfB Rosenheim — Ball impact safety: test per DIN 18032-3:1997-04 (36 throws, 16.5 ± 0.8 m/s for ceilings)(otwiera się w nowej karcie)
- Ecophon Super G A — system datasheet (2024-05-16): classes 2A and 3A, clips and cross tees(otwiera się w nowej karcie)
- Ecophon Super G — product family: Super G B and Super G Plus A in class 1A(otwiera się w nowej karcie)
- Ecophon Super G B — system datasheet (2023-06-15): class 1A per EN 13964 Annex D, compliance with DIN 18032 part 3(otwiera się w nowej karcie)