Understanding Multi Impact Industrial Helmet Standards
Understanding Multi-Impact Helmet Standards
Are you adequately protected? The human head is an incredibly complex, sophisticated control centre for the entire body and mind, and should be protected at all costs.
Many helmets for industrial use are only designed and intended to protect the crown of the head from falling objects. For work at height, many construction activities, industrial rope access and abseil, on elevated work platforms and boom lifts it's essential that in the event of an uncontrolled fall the helmet is retained on the head and can take multiple impacts. Modern helmet technology means an impact absorbing helmet performs like the panels of a modern car- being designed to absorb the force of impacts- rather than just deflecting forces. Ultimately the helmet should protect the head and skull by lowering the impact forces, therefore reduciing risk of brain damage and limiting the forces transmitted down the spine. Select a helmet with the impact and penetration testing standards most appropriate to your work activities.
EN397:2012 and AS/NZS 1801:1997
THE STANDARD INDUSTRIAL SAFETY HELMET STANDARDS (Protection from falling objects)
Testing is only carried out to the top of the helmet. A 49J impact only to the crown of the helmet measures the shock absorption and a penetration test with a 3kg conical striker from 1 m. There is no side impact test in this standard- only a lateral rigidity test, which is a slow, progressive force loading, and is not an impact test. EN 397 requires a chinstrap which is designed to release under load with a force of 150N< F <250N. Helmet standard AS/NZS1801 is intended only to protect the head from falling objects.
THE STANDARD FOR MOUNTAINEERS & INDUSTRIAL WORK AT HEIGHTS (Multi-impact helmet to protect head during tumbling falls and from falling objects)
A helmet complying to the mountaineering standard must be designed approved by the manufacturer for industrial use. (Mountaineering standard helmets for sports equipment are not suitable for use on industrial sites) Impact tested with two 5kg strikers: a hemispherical striker is dropped from 2m onto the crown of the helmet and a flat striker from 500mm on to the front, rear & side by tilting the headform to 30°. In all cases, the transmitted force through the neck of the headform must not exceed 10kN. Two penetration tests with a 3kg pointed striker are also performed within on any point around the shell of the helmet without making contact with the headform. Exceeds the shock absorption and impact tests of AS/NZS 1801 & EN397. Non releasing chinstrap F >500N so the helmet is retained on the head during a tumbling fall or multi-impacts.
THE STANDARD FOR HIGH PERFORMANCE INDUSTRIAL SAFETY HELMETS (Extreme rated multi-impact helmet to protect head from trauma, tumbling falls and from falling objects)
Extreme rated helmet standard, the specification includes the requirement for side impact protection. Tests require that the shell is subjected to a total of 150J of impact energy, 100J to the top of the helmet and 50J to the side (up to 60° from the crown) of the helmet. Penetration testing is also required with a "blade" striker being dropped from 2.5m to give an impact energy of 25J on to the top of the helmet and an impact energy of 20J from 2m on the side of the helmet. Exceeds the shock absorption and impact tests of AS/NZS 1801, EN397 and EN12492. Non-releasing chinstrap F>500N so the helmet is retained on the head during a tumbling fall or multi-impacts.
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