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Snow cannons at the slope edge, the paradigm shift to a padding duty

The new thesis I.L.4 (ZVR 2023, 469) requires mechanical padding for mobile snow-making devices in principle. Practical guide for injured skiers.

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Mag. Christopher Angerer

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30 May 2026 · Mag. Christopher Angerer

The 2023 Seilbahnsymposium fundamentally shifted the line on securing mobile snow-making devices (snow cannons). Where optical securing with stick nets used to suffice, the new thesis I.L.4 (ZVR 2023, 469) today requires, in principle, mechanical padding. This paradigm shift has immediate practical consequences for injured skiers.

This post, the third in the series "Slope safety 2026", works through the new line, sorts it by device construction and terrain steepness and shows when a claim against the slope operator is promising and when not. Audience: injured skiers after a collision with a snow-making device, snow lance, hose, connector box or generator.

From a lawyer's perspective the key observation is: manufacturers today build mobile devices on a noticeably higher support frame with wheels. Precisely this frame allows ground-near padding without compromising the function of the nozzle head or its swivelling. Anyone still operating to the old yardstick with stick nets alone is no longer on the safe side.

Frame device and location

Which construction, what level of securing?

Answer one or two questions on the device type and on padding. You receive a first assessment against the new thesis I.L.4 (ZVR 2023, 469).

You already know you want to send a request? Go directly to the contact form.

01 Question 1

What type of device caused the collision?

The 2023 thesis distinguishes by construction type. Tall mobile propeller devices on a support frame can be mechanically secured; older low-built models often cannot.

All paths at a glance

Overview of all answers.

01

Safety duty usually breached, claim very promising.

The new thesis I.L.4 (ZVR 2023, 469) requires mechanical securing through padding for mobile snow-making devices on a support frame in principle. Pure optical securing through stick nets is now only sufficient in justified exceptions. Missing padding despite suitable construction therefore fulfils the liability-relevant security defect.

Evidence: photos of the device (front, side, with scale), position on the slope, steepness, sight conditions, stick net location. The device's model designation (type plate) and the ski area's documentation of its padding practice are central in litigation.

02

Safety duty usually met, claim depends on additional factors.

Functional padding on the support frame largely relieves the slope operator. Remaining anchors are the height of the padding (usually possible up to 1.2 to 1.4 m), the impact speed and the severity of the injury. For very serious head injuries a careful examination of the padding height and the supplementary stick net is worthwhile.

Your own accident insurer and health insurer are the first ports of call. Pursuing a claim against the slope operator is only economically sensible with clear pointers to a breach of duty beyond the padding itself.

03

Under the new thesis usually insufficient, claim viable.

The old practice of pure stick-net solutions has, since the new thesis I.L.4 (ZVR 2023, 469), no longer counted as sufficient for tall mobile snow-making devices. Stick nets have a primarily optical character and only a very weak catch effect. They supplement the padding but do not replace it.

Claim in this constellation usually viable. Evidentiary effort moderate because the 2023 line is clearly documented and the construction type of the device (tall support frame, padable) is established in litigation.

04

Padding that exists but is functionally unsuitable does not fulfil the duty, claim viable.

Padding that is iced, torn or loose cannot fulfil its protective purpose. The safety duty is breached. The slope operator's duty includes not only initial mounting but also regular maintenance and control.

Evidence is important: immediate close-up photos of the padding condition; request maintenance logs in litigation.

05

Clear breach of duty, snow lances have long been firm padding standard.

Snow lances are the classic example of an artificial massive obstacle in the dedicated ski area (RIS-Justiz RS0023485, OGH 1 Ob 63/11p). Missing sheathing is a clear breach of duty. Prospects are high.

Secure all detail photos of the body and height. Slope-rescue protocol and lawyer letter to slope operator and liability insurer are the next steps.

06

Safety duty usually met, claim only with particular circumstances.

A properly sheathed snow lance relieves the slope operator. Anchors for a claim only exist with particular circumstances such as an unusual position directly after a crest, a flawed choice of location in particularly steep terrain or deficient maintenance. A brief legal assessment classifies whether this constellation is present.

07

Setting up on a steep slope is inadmissible under the new 2023 thesis, claim very promising.

The new thesis I.L.4 is unequivocal: low-built devices that cannot be padded by construction must not be placed in particularly steep slope sections. Mere visibility or purely optical securing is not enough here. Setting up such a device anyway breaches the duty.

Evidence: document slope steepness (photo with comparison object, GPS), device construction, height, missing padding option. Expert opinions on steepness are typical in litigation.

08

For older low-built devices in flatter terrain, prospects are more differentiated.

For older low-built devices that cannot be padded by construction, the new thesis I.L.4 requires stick-net securing at an appropriate distance. In flatter terrain this is the minimum requirement, and the yardstick remains stricter than without mobile devices at all. The device remains an artificial massive obstacle; a claim is possible but depends on the concrete configuration.

09

Supply installations are also subject to a safety duty, prospects often high.

Thesis I.L.4 expressly covers the supply installations belonging to the snow-making devices: hoses, connector boxes, generators, water and power lines. They are to be secured as artificial obstacles in the dedicated ski area. A crossing line, an unsecured connector box in the slope area or an exposed generator regularly meet the breach of duty.

The 2023 paradigm shift

Until 2023, the thesis II.E.4 from the 2006 thesis codification governed mobile snow-making devices: padding was rated as not reasonable because it impedes device function and frequent location changes; optical securing through wedge-shaped stick nets was usually sufficient.

The new thesis I.L.4 (ZVR 2023, 469) breaks with this line. Three observations were decisive: first, mobile devices today are no longer moved daily but often run for days or weeks at the same location. Second, construction has changed; higher support frames with wheels allow ground-near padding on the frame without compromising the blower or its swivelling. Third, the practice of many ski areas already implements this padding de facto.

The new thesis has three steps: (a) Snow-making devices are artificial and massive obstacles and must in principle be mechanically secured. (b) This also applies to mobile devices where the construction allows padding without impairing function; supplementary stick-net securing is required in poor visibility or particular steepness. (c) Where padding is not possible by construction, at least stick-net securing must be in place; in particularly steep sections such devices may not be placed at all.

Practice for clients after a collision

After a collision with a snow cannon, securing evidence is time-critical. After the season ends, devices are often moved to a maintenance site, padding removed, stick nets rolled up. On-site photos are therefore precious. Shots should capture construction (height, support frame, wheels, nozzle head), padding condition (present, iced, damaged) and location (steepness, sight conditions, stick-net position above).

In litigation, construction and type of the device (type plate, manufacturer documentation) are usually established, supplemented by the ski area's maintenance logs. Expert opinions on padding possibility by construction and on slope steepness are standard. The duties of the ski area operators have been clearly extended by the 2023 thesis.

In insurance terms a wide-ranging operating-liability policy applies in many ski areas. An out-of-court demand letter to the slope operator and his liability insurer is the typical first step; many cases settle in the pre-litigation phase because the file position under the new thesis is clearer than before.

In short: Mobile snow-making devices have, since 2023, to be mechanically secured in principle (padding on the support frame), no longer only optically through stick nets. Anyone resting on the old practice is no longer on the safe side. The duty also covers supply installations (hoses, connector boxes, generators).

Frequently asked

Snow cannon, padding and claim.

Does the new thesis I.L.4 also apply to snow-making devices off the slope? +

No. The securing duty under the wording of the thesis only applies to devices in the dedicated ski area, that is on the slope and in the roughly 2-metre slope-edge strip. Devices placed further away are not covered by the thesis.

What is the maximum padding height on mobile snow-making devices? +

By construction, padded mats on the support frame can be mounted up to about 1.2 to 1.4 m height. Padding beyond that is only possible on stationary lances with a pipe body.

What if the ski area claims the padding was mounted shortly after my fall? +

Decisive is the condition at the time of the fall. Photos of the fall site, witnesses, slope-rescue protocol and the ski area's maintenance log are the central evidence. Later padding is irrelevant in liability terms for the damage already incurred.

Does the new thesis also apply to snow lances at the slope edge? +

Yes, thesis I.L.4 covers all snow-making devices, including stationary snow lances. For these, sheathing of the vertical pipe body has long been firm standard. Missing sheathing is a clear breach of duty.

What does the duty to secure "supply installations" cover concretely? +

Hoses (water and compressed air), connector boxes, generators and the associated water and power lines. A line crossing the slope or an exposed generator in the slope area regularly establishes the breach of duty.

Had an accident?

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