Which statement about Type C devices (clutch, pressure relief, or inherent force limiting) is correct?

Which statement about Type C devices (clutch, pressure relief, or inherent force limiting) is correct?

• A. They can be used for entrapment protection on any gate
• B. They can never be used for entrapment protection on horizontal slide, vertical lift, or vertical pivot gates
• C. They are required for all Class II gates
• D. They are optional for residential gates

Answer: (B)

Type C devices are meant to limit force or relieve pressure in a mechanism, not to actively detect contact and stop or reverse movement. For entrapment protection, especially on horizontal sliding, vertical lift, or vertical pivot gates, you need a device that can sense contact and promptly halt or reverse motion. Type C devices don’t reliably provide that kind of protection for those gate motions, so they are not used for entrapment protection on those gate types. The other statements misstate how Type C devices are applied or required, so they don’t fit with how entrapment protection standards specify these devices.

Type C devices are meant to limit force or relieve pressure in a mechanism, not to actively detect contact and stop or reverse movement. For entrapment protection, especially on horizontal sliding, vertical lift, or vertical pivot gates, you need a device that can sense contact and promptly halt or reverse motion. Type C devices don’t reliably provide that kind of protection for those gate motions, so they are not used for entrapment protection on those gate types. The other statements misstate how Type C devices are applied or required, so they don’t fit with how entrapment protection standards specify these devices.