Reference: ÖNORM, EN 1077, Edition: 2007-12-01, Helmets for alpine skiers and snowboarders
Helmets for alpine skiers and snowboarders
Casques pour skieurs de ski alpin et de surf nes neiges Helme für alpine Skiläufer und für Snowboarder
This European Standard was approved by CEN on 17 February 2007.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of:
- Czech Republic,
- United Kingdom.
The intention of helmets is to reduce the risk of injury to the skull and part of the head surrounded by the helmet.
A proportion of the energy of an impact is absorbed by the helmet, thereby reducing the force of the blow sustained by the head. The structure of the helmet may be damaged in absorbing this energy and any helmet that sustains a severe blow should be replaced even if damage is not apparent.
To achieve the performance of which it is capable, and to ensure stability on the head, a helmet should be as closely fitting as possible consistent with comfort. In use it is essential that the helmet is securely fastened, with any chin strap under proper tension at all times.
Although the experience of the existing standard for alpine skiers is very good, it has become more and more obvious that there is a need for an alternative standard that can meet the demand from skiers and snowboarders who desire more ventilation and better hearing. This has resulted in two classes of helmets, class A and class B. Compared to class B, class A protects a larger area of the head and offers a higher degree of protection from penetration.
Central European Norm (CEN): CE 1077-- CEN, the European Committee for Standardization, was founded in 1961 by the national standards bodies in the European Economic Community and EFTA countries. It's major mission today is to establish voluntary technical standards which promote free trade, as well as the safety of workers and consumers in the European Union, and European Economic Areas.
Helmets meeting this standard are tested using a drop-rig and an instrumented "headform," approximating the size and shape of a human head. The specified single drop height is 1.5 meters, and to pass the test, on impact, peak acceleration imparted to the headform cannot exceed 250 Gs. The impact surface is a flat anvil, and it is the only anvil type required of the test. The specified drop height, headform weight, and peak velocity results in energy impact equalling 69 Joules for a size medium helmet (CE 1077 energy impacts vary according to the size of the headform. The smallest size headform/helmet combo impacts with a force of less than 48 Joules, the largest impacts at more than 95 Joules).
A retention system (chin strap) test is included, along with a resistance to rotational force test.
Under CE 1077 a penetration test is also called for. This is a "drop-hammer" type test where the helmet and headform is allowed to drop onto a conical metal punch from a height of .75 meters. (750mm). The helmet fails the test if the punch makes contact with the headform. This test is intended to simulate the possibility of a ski pole tip or tree branch penetrating the helmet. It has been reported that a revision to CE 1077 is expected to be published in the coming months, among the changes is a modification to this penetration test, lowering the drop height by half to 375mm, and also lowering the velocity at which the helmet strikes the punch by more than 25%.