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Grigri (climbing)
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 safety features to the original design, and 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. Mechanism of operation The Grigri works by pinching the rope when it is moving quickly (like in a fall), making it an assisted braking belay device. This function distinguishes it from traditional belay devices such as a Sticht plate or an ATC, whose braking mechanisms depend entirely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grigri (no Hands)
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 safety features to the original design, and 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. Mechanism of operation The Grigri works by pinching the rope when it is moving quickly (like in a fall), making it an assisted braking belay device. This function distinguishes it from traditional belay devices such as a Sticht plate or an ATC, whose braking mechanisms depend entirely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Rope
Kernmantle rope () is rope constructed with its interior core protected by a woven exterior sheath designed to optimize strength, durability, and flexibility. The core fibers provide the tensile strength of the rope, while the sheath protects the core from abrasion during use. This is the only construction of rope that is considered to be life safety rope by most fire and rescue services. Parachute cord Parachute cord (also paracord or 550 cord when referring to type-III paracord) is a lightweight nylon kernmantle rope originally used in the suspension lines of parachutes. This cord is useful for many other tasks and is now used as a general purpose utility cord by both military personnel and civilians. Use as climbing rope One of the uses of kernmantle rope is as climbing rope. Nylon ropes that were used in yachts for hauling were tested and found useful in climbing and caving and are now the modern standard. The German company Edelrid introduced the first kernmantel rope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caving Equipment
Caving equipment is equipment used by cavers and speleologists to aid and protect them while exploring caves. The term may also be used to refer to equipment used to document caves, such as photographic and surveying equipment. Originally, cave diving equipment was quite limited, but the increasing popularity of caving during the 20th century led to the creation of specialist caving equipment and companies. Due to the greatly varying conditions of caves throughout the world there is a multitude of different equipment types and categories. Cavers exploring a largely dry system may wear a fleece one-piece undersuit with a protective oversuit while cavers exploring a very wet cave may opt to use wetsuits. Cavers in large dry systems in the tropics and in desert climates may simply opt to wear shorts and a T-shirt. History The earliest cavers in Europe and North America were limited in their explorations by a lack of suitable equipment. Explorers of the early 1800s, when caving beg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jumaring
An ascender is a device (usually mechanical) used for directly ascending a rope, or for facilitating protection with a fixed rope when climbing on very steep mountain terrain. Ascenders can also be used as a braking component within a rope hauling system, often used in rescue situations. Use Ascenders are usually used in pairs, and offer similar functionality to friction knots, but are faster, safer and easier to use, albeit still with consequences in weight and in security (as ascenders can, even with a locking carabiner, come off the rope, and fail by shredding the rope at high loads, rather than slipping and fusing as with friction knots). A mechanical ascender employs a cam which allows the device to slide freely in the intended direction of movement, but provide a firm grip on the rope when pulled in the opposite direction. To prevent an ascender from accidentally coming off the rope, a locking mechanism or trigger is deployed. The ascender is first attached to the cli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-belay
Self-belay is the use of self-locking belaying equipment by a single person while rock climbing or mountaineering. Typically, belaying involves a two-person team: a climber ascends, while a belayer takes in their rope slack, ready to catch and arrest their fall; when self-belaying, the climber plays both roles. In mountaineering, a climber can employ a self-belay with an ice axe to prevent a slide down a snow-covered slope. To use an ice axe to self-belay, a climber will hold the axe by the head in the climber's uphill hand. As the climber moves up the slope, the climber will push the shaft of the axe several inches into the snow with every other step. If the axe is set firmly enough, it will aid in preventing a slip from becoming a fall. If a slip occurs, the climber presses down on the head of the axe causing the shaft to sink deeper into the snow, anchoring the climber. If this method is unsuccessful, the climber may fall and slide down the slope having to rely on a techniqu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roped Solo Climbing
Roped solo climbing or rope soloing is a form of solo climbing without a climbing partner, but with the safety of rope protection. Variations *Roped solo free climbing refers to top roping on a fixed rope, a traditional (aka trad) climb, or a sport climb. *Rope solo aiding involves fixing the rope to an anchor and connecting yourself to the free end with either knots or one of the various modern devices designed for roped soloing. Then the pitch is led as a standard aid pitch would be led. The process is identical to roped solo free climbing, but is usually much easier to manage. *Simul solo aid is a speed climbing technique where two climbers aid climb at the same time on opposite ends of the same rope. While climbing they alternate between free, aid, soloing, and simul climbing depending on the situation. Potential danger Roped soloing is much less dangerous than free soloing Free solo climbing, or free soloing, is a form of technical ice or rock climbing where the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Capitan
El Capitan ( es, El Capitán; "the Captain" or "the Chief") is a vertical Rock formations in the United States, rock formation in Yosemite National Park, on the north side of Yosemite Valley, near its western end. The El Capitan Granite, granite monolith is about from base to summit along its tallest face and is a popular objective for rock climbers. Naming The formation was named "El Capitan" by the Mariposa Battalion when they explored the valley in 1851. ''El Capitán'' ("the captain", "the chief") was taken to be a loose Spanish translation of the local Native Americans in the United States, Native American name for the cliff, “Tutokanula” or "Rock Chief" (the exact spelling of Tutokanula varies in different accounts as it is a phonetic transcription of the Miwok, Miwok language). The "Rock Chief" etymology is based on the written account of Mariposa Battalion doctor Lafayette Bunnell in his 1892 book. Bunnell reports that Ahwahneechee Chief Tenaya explained to him, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half Dome
Half Dome is a granite dome at the eastern end of Yosemite Valley in Yosemite National Park, California. It is a well-known rock formation in the park, named for its distinct shape. One side is a sheer face while the other three sides are smooth and round, making it appear like a dome cut in half. The granite crest rises more than above the valley floor. Geology The impression from the valley floor that this is a round dome that has lost its northwest half, is just an illusion. From Washburn Point, Half Dome can be seen as a thin ridge of rock, an arête, that is oriented northeast–southwest, with its southeast side almost as steep as its northwest side except for the very top. Although the trend of this ridge, as well as that of Tenaya Canyon, is probably controlled by master joints, 80 percent of the northwest "half" of the original dome may well still be there. Ascents As late as the 1870s, Half Dome was described as "perfectly inaccessible" by Josiah Whitney of the Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Big Wall Climber
Big wall climbing is a type of rock climbing where a climber ascends a long multi-pitch route, normally requiring more than a single day to complete the climb. Big wall routes require the climbing team to live on the route often using portaledges and hauling equipment. It is practiced on tall or more vertical faces with few ledges and small cracks. History In the early 20th century, climbers were scaling big rock faces in the Dolomites and the European Alps employing free- and aid-climbing tactics to create bold ascents. Yet, the sheer walls were waiting to be climbed by future generations with better tools and methods. In addition, many nations in the early 1900s had specialized army units that had developed wall climbing skills for gaining surprise entry into enemy fortifications by wall climbing. In the early 1900s the Filipino Scouts, a US Army unit composed of Filipino enlisted and American officers, demonstrated their specialized skills by climbing the steep walls of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belay
Belaying is a variety of techniques climbers use to create friction within a climbing system, particularly on a climbing rope, so that a falling climber does not fall very far. A climbing partner typically applies tension at the other end of the rope whenever the climber is not moving, and removes the tension from the rope whenever the climber needs more rope to continue climbing. The term "belay" also means the place where the belayer is anchored; this is typically the ground or a ledge, but may be a ''hanging belay'', where the belayer themself is suspended from an anchor in the rock. How it works Belaying is a critical part of the climbing system. A correct belaying method lets the belayer hold the entire weight of the climber with relatively little force, and easily arrest even a long fall. In its simplest form, a belay consists of merely a rope that runs from a climber to another person (the belayer) who can stop the climber's fall. In the modern day, most climbers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belay Device
A belay device is a mechanical piece of climbing equipment used to control a rope during belaying. It is designed to improve belay safety for the climber by allowing the belayer to manage their duties with minimal physical effort. With the right belay device, a small, weak climber can easily arrest the fall of a much heavier partner. Belay devices act as a friction brake, so that when a climber falls with any slack in the rope, the fall is brought to a stop. Typically, when the rope is held outward, away from the body, it moves relatively freely, so the belayer can take up or pay out slack. When the rope is brought backward, to the side of the body, the rope is forced into tight bends and rubs against the device and/or against itself, allowing the belayer to arrest the descent of a climber in the case of a fall. This rubbing slows the rope, but also generates heat. Some types of belay devices can arrest a fall without the belayer taking any action, while others require the belayer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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