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>A sign urges parents to take off their children’s cycle helmets in order to eliminate a strangulation risk. That's ironic - PPE that becomes dangerous in a di

>A sign urges parents to take off their children’s cycle helmets in order to eliminate a strangulation risk. That's ironic - PPE that becomes dangerous in a different environment.

TeMPOraL 4y ago
Another example: there's a reason the security briefing on airplanes tells you to not inflate the vest while still inside the cabin.
- ndsipa_pomu 4y ago
  Also helicopters. There used to be a gentleman who gave the mandatory safety briefing before taking guests from Lundy Island by helicopter (the only travel option in winter months) who would make the point that if one person inflates their vest, the other passengers would lemming-like inflate their vests and then you suddenly find the cabin is filled with 5 or 6 inflated people that have no chance of getting out of the door. He always used to joke that the whistle was to amuse yourself until the coastguard arrived.
paleogizmo 4y ago
Another common example: don't wear safety gloves when working with rotating equipment, as they can catch and drag one's hand in
ip26 4y ago
Helmets in particular have tremendous specificity, which is fascinating. Bicycle, ski, and motorcycle helmets have MIPS. Motorcycle helmets have chin guards. Bicycle helmets have side impact protection. Climbing helmets have puncture resistance and top impact protection. Ski helmets have puncture resistance and coverage close to a motorcycle helmet, but less cushion. I’m sure the list is long for hard hats as well. Kids helmets have started to show up with breakaway neck straps- the strap only need be so strong to prevent the helmet from slipping off in a crash.
texec 4y ago
For workplace protection helmets there are two European norms: EN 12492 for climbers and mountaineers requires >50kg holding force on the chin strap, to not come loose in case of a fall. EN 397 for industrial hard hats (on the ground) require chin straps to open on <25kg, to protect the wearer from strangulation in case of a fall.

>A sign urges parents to take off their children’s cycle helmets in order to eliminate a strangulation risk. That's ironic - PPE that becomes dangerous in a different environment.

TeMPOraL 4y ago

Another example: there's a reason the security briefing on airplanes tells you to not inflate the vest while still inside the cabin.

ndsipa_pomu 4y ago
Also helicopters. There used to be a gentleman who gave the mandatory safety briefing before taking guests from Lundy Island by helicopter (the only travel option in winter months) who would make the point that if one person inflates their vest, the other passengers would lemming-like inflate their vests and then you suddenly find the cabin is filled with 5 or 6 inflated people that have no chance of getting out of the door. He always used to joke that the whistle was to amuse yourself until the coastguard arrived.

paleogizmo 4y ago

Another common example: don't wear safety gloves when working with rotating equipment, as they can catch and drag one's hand in

ip26 4y ago

Helmets in particular have tremendous specificity, which is fascinating. Bicycle, ski, and motorcycle helmets have MIPS. Motorcycle helmets have chin guards. Bicycle helmets have side impact protection. Climbing helmets have puncture resistance and top impact protection. Ski helmets have puncture resistance and coverage close to a motorcycle helmet, but less cushion. I’m sure the list is long for hard hats as well. Kids helmets have started to show up with breakaway neck straps- the strap only need be so strong to prevent the helmet from slipping off in a crash.

texec 4y ago

For workplace protection helmets there are two European norms: EN 12492 for climbers and mountaineers requires >50kg holding force on the chin strap, to not come loose in case of a fall. EN 397 for industrial hard hats (on the ground) require chin straps to open on <25kg, to protect the wearer from strangulation in case of a fall.