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GriGri
A Grigri (styled as GriGri or GRIGRI) is an assisted braking belay device manufactured by Petzl designed to help secure rock-climbing, rappelling, and rope-acrobatic activities. Its main characteristic is a clutch that assists in braking under a shock load. The success of this device has led to grigri becoming a common name for devices of this type. In 2011 a new version, the Grigri 2, was released to replace the original 1991 model. Petzl released the Grigri+ in 2017, adding new safety features to the original design. However this made the device heavier and many climbers felt the new safety features (specifically the anti panic handle which stopped the device from lowering when the handle was pulled too far back) got in the way of normal operation when lowering. 2019 saw the release of an updated version of the device, simply called the Grigri. It is named for the African amulet gris-gris, believed to protect the wearer from evil.
The Grigri is a belay device. It works by generating a pinching force from the force imparted to the device's live end. When a sufficient force is applied to the live end such as in a fall, the device locks up and prevents an uncontrolled fall. This function distinguishes it from traditional belay devices such as a Sticht plate or an ATC, whose braking mechanisms depend entirely on the user controlling the rope in a specific manner to increase or decrease friction. Inside the Grigri, the rope runs along a disc cam; the cam allows the rope to pass if moving slowly enough in order to not generate a drag force over the device's threshold.
Because some force needs to be present in the live end of the rope in order for the device to work as intended, it is very important for the belayer to keep a grip on the brake end at all times. This ensures there is always enough seed tension in the rope for the device to work correctly. In other words, the Grigi also has a user dependent braking mechanism.
Petzl recommends the device for lead belaying and top-rope belaying, according to EN 15151 standard.
When used correctly, the Grigri's camming mechanism can assist in holding a climber that is working a route, or hanging on the rope while trying to figure out a climb. When belaying, the same technique for "taking in" that is used with an ATC or similar device is used. While paying slack out into the system, if the device is held open by pressing on the cam and the climber falls, the device will lock as long as the belayer is holding the brake strand. However, the device will not lock should the belayer let go of the brake strand while holding the cam in the open position.
Each generation of the GriGri has a lower limit for the rope diameter for which the cam will engage, and an upper limit for maximum rope diameter to allow for feeding.
- The original Grigri is stamped MIN 10 MAX 11.
- The manufacturer recommends the GriGri 2 to be used only with 8.9 to 11 mm diameter ropes.
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GriGri
A Grigri (styled as GriGri or GRIGRI) is an assisted braking belay device manufactured by Petzl designed to help secure rock-climbing, rappelling, and rope-acrobatic activities. Its main characteristic is a clutch that assists in braking under a shock load. The success of this device has led to grigri becoming a common name for devices of this type. In 2011 a new version, the Grigri 2, was released to replace the original 1991 model. Petzl released the Grigri+ in 2017, adding new safety features to the original design. However this made the device heavier and many climbers felt the new safety features (specifically the anti panic handle which stopped the device from lowering when the handle was pulled too far back) got in the way of normal operation when lowering. 2019 saw the release of an updated version of the device, simply called the Grigri. It is named for the African amulet gris-gris, believed to protect the wearer from evil.
The Grigri is a belay device. It works by generating a pinching force from the force imparted to the device's live end. When a sufficient force is applied to the live end such as in a fall, the device locks up and prevents an uncontrolled fall. This function distinguishes it from traditional belay devices such as a Sticht plate or an ATC, whose braking mechanisms depend entirely on the user controlling the rope in a specific manner to increase or decrease friction. Inside the Grigri, the rope runs along a disc cam; the cam allows the rope to pass if moving slowly enough in order to not generate a drag force over the device's threshold.
Because some force needs to be present in the live end of the rope in order for the device to work as intended, it is very important for the belayer to keep a grip on the brake end at all times. This ensures there is always enough seed tension in the rope for the device to work correctly. In other words, the Grigi also has a user dependent braking mechanism.
Petzl recommends the device for lead belaying and top-rope belaying, according to EN 15151 standard.
When used correctly, the Grigri's camming mechanism can assist in holding a climber that is working a route, or hanging on the rope while trying to figure out a climb. When belaying, the same technique for "taking in" that is used with an ATC or similar device is used. While paying slack out into the system, if the device is held open by pressing on the cam and the climber falls, the device will lock as long as the belayer is holding the brake strand. However, the device will not lock should the belayer let go of the brake strand while holding the cam in the open position.
Each generation of the GriGri has a lower limit for the rope diameter for which the cam will engage, and an upper limit for maximum rope diameter to allow for feeding.
- The original Grigri is stamped MIN 10 MAX 11.
- The manufacturer recommends the GriGri 2 to be used only with 8.9 to 11 mm diameter ropes.