Auto belay

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The "TruBlue Speed" auto belay device fixed at the top of an indoor climbing route Autobelay TruBlue Speed 8615e.jpg
The "TruBlue Speed" auto belay device fixed at the top of an indoor climbing route

An auto belay (or autobelay) is a mechanical device used for belaying in indoor climbing walls, in both training and competition climbing formats. The device enables a climber to ascend indoor routes on a top rope but without the need for a human belaying partner. The device, which is permanently mounted in a fixed position at the top of the route, winds up a tape or steel wire to which the ascending climber is attached. When the ascending climber sits back, or falls, the auto belay automatically brakes and smoothly lowers the climber to the ground. [1] [2]

Contents

Types

Braking

Eddy current brake Eddy current brake diagram.svg
Eddy current brake

Breaking methods are electromagnetic, hydraulic, and based on centrifugal force. [3] The electro-magnetic method uses the Eddy current brake principle. It requires a conductive disk that rotates through the magnetic field of a strong permanent magnet. When the disk moves, the magnet exerts a drag force on the metal which opposes its motion, due to circular electric currents called eddy currents induced in the metal by the magnetic field. The breaking force is proportional to the weight of the climber. As the magnet and disk are not in mechanical contact, this system does not wear off from breaking. [1] [4]

The hydraulic method employs a closed system filled with oil and pressurized air. The braking effect is created by a valve, limiting the oil flow. The system does not adjust to the weight of the climber and is difficult to maintain [1] [4]

The method employing the centrifugal force moves breaking pads against a drum when the system rotates during descent. The wear-and-tear is the highest for this method. [1]

Lead

While traditional auto belays use a top roping format with the device hanging from the top of the route, in 2021, a new type of auto belay–the lead auto belay–was developed that used a lead climbing format (i.e. the climber clipped into the quickdraws like a normal lead climb on a sport climbing route), where the device was fixed to the bottom of the route. [5] [6]

Operation

Climber on a competition speed climbing route with autobelay Climber training in speed route with Autobelay 8766e.jpg
Climber on a competition speed climbing route with autobelay

The main purpose of auto belay devices is the immediate capture of a falling climber, and the controlled descent of the climber once the route is finished (or after the climber has fallen). [1] While a human belay partner is able to tighten the rope on the climber's demand to allow the climber to take a rest on the route before re-trying a sequence (i.e. hangdogging), the auto belay will not "hold" the climber and will instead begin to lower the climber smoothly as soon as they lose contact with the wall. [1]

In recent years, more advanced devices, such as the Trublue iQ+ Auto Belay, contain a secondary braking system and electronic communication, allowing climbers to remain on the wall after a fall, without immediately lowering ("catch-and-hold" mode). This rest period allows climbers to "project" more difficult routes in a style that is more similar to top roping with a human belay partner. [7]

The climber's rate of ascent must not exceed the speed at which the device takes in the wire or tape, to avoid creating slack. Devices specifically for competition speed climbing [2] are therefore constructed with a very quick take-in time, i.e. 15 m in 3.2–3.5 s, which is faster than the world record. [8] [9]

Dangers

There have been a number of serious, and some fatal, accidents regarding the use of auto belay devices in indoor climbing walls. [10] [11] [12] Reasons include:

To mitigate these risks, climbers are recommended to take a test fall early in the process of climbing at a height that is sufficiently high that the device will engage fully, but at which falling would be less serious than at a greater height. [18]

Standards

See also

Related Research Articles

<span class="mw-page-title-main">Carabiner</span> Shackle with a spring-loaded gate

A carabiner or karabiner, often shortened to biner or to crab, colloquially known as a (climbing) clip, is a specialized type of shackle, a metal loop with a spring-loaded gate used to quickly and reversibly connect components, most notably in safety-critical systems. The word comes from the German Karabiner, short for Karabinerhaken, meaning "carbine rifle hook" used by a carbine rifleman, or carabinier, to attach his carbine to a belt or bandolier.

<span class="mw-page-title-main">Climbing wall</span> Artificial rock climbing wall

A climbing wall is an artificially constructed wall with manufactured grips for the hands and feet. Most walls are located indoors, and climbing on such walls is termed indoor climbing. Some walls are brick or wooden constructions, but on most modern walls, the material most often used is a thick multiplex board with holes drilled into it. Recently, manufactured steel and aluminum have also been used. The wall may have places to attach belay ropes, but may also be used to practice lead climbing or bouldering.

<span class="mw-page-title-main">Glossary of climbing terms</span> For rock climbing and mountaineering

Glossary of climbing terms relates to rock climbing, mountaineering, and to ice climbing.

<span class="mw-page-title-main">Rock-climbing equipment</span> List of manmade gear

Rock-climbing equipment varies with the type of climbing undertaken. Bouldering needs the least equipment outside of shoes and chalk and optional crash pads. Sport climbing adds ropes, harnesses, belay devices, and quickdraws to clip into pre-drilled bolts. Traditional climbing adds the need for carrying a "rack" of temporary passive and active protection devices. Multi-pitch climbing adds devices to assist in ascending and descending fixed ropes. And finally aid climbing uses unique equipment.

<span class="mw-page-title-main">Abseiling</span> Rope-controlled descent

Abseiling, also known as rappelling, is the controlled descent of a steep slope, such as a rock face, by moving down a rope. When abseiling, the person descending controls their own movement down the rope, in contrast to lowering off, in which the rope attached to the person descending is paid out by their belayer.

<span class="mw-page-title-main">Solo climbing</span> Style of climbing performed alone

Solo climbing, or soloing, is a style of climbing in which the climber climbs a route alone, without the assistance of a belayer. By its very nature, it presents a higher degree of risk to the climber, and in some cases, is considered extremely high risk. Note that the use of the term "solo climbing" is generally separate from the action of bouldering, which is itself a form of solo climbing, but with less serious consequences in the case of a fall. The most dangerous form of solo climbing is free solo climbing, which means both climbing alone and without any form of climbing protection.

<span class="mw-page-title-main">Belaying</span> Rock climbing safety technique using ropes

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.

<span class="mw-page-title-main">Lead climbing</span> Technique of rock climbing

Lead climbing is a technique in rock climbing where the lead climber clips their rope to the climbing protection as they ascend a pitch of the climbing route, while their second remains at the base of the route belaying the rope to protect the lead climber in the event that they fall. The term is used to distinguish between the two roles, and the greater effort and increased risk, of the role of the lead climber.

<span class="mw-page-title-main">Top rope climbing</span> Type of rock climbing

Top rope climbing is a form of rock climbing where the climber is securely attached to a climbing rope that runs through a fixed anchor at the top of the climbing route, and back down to the belayer at the base of the climb. A climber who falls will just hang from the rope at the point of the fall, and can then either resume their climb or have the belayer lower them down in a controlled manner to the base of the climb. Climbers on indoor climbing walls can use mechanical auto belay devices to top rope alone.

<span class="mw-page-title-main">Fall factor</span> Mathematical ratio relevant to climbing safety

In lead climbing using a dynamic rope, the fall factor (f) is the ratio of the height (h) a climber falls before the climber's rope begins to stretch and the rope length (L) available to absorb the energy of the fall,

<span class="mw-page-title-main">Rock climbing</span> Type of sport

Rock climbing is a sport in which participants climb up, across, or down natural rock formations or indoor climbing walls. The goal is to reach the summit of a formation or the endpoint of a usually pre-defined route without falling. Rock climbing is a physically and mentally demanding sport, one that often tests a climber's strength, endurance, agility and balance along with mental control. Knowledge of proper climbing techniques and the use of specialized climbing equipment is crucial for the safe completion of routes.

<span class="mw-page-title-main">Munter hitch</span> Adjustable knot used control friction in a belay system

The Munter hitch, also known as the Italian hitch, mezzo barcaiolo or the crossing hitch, is a simple adjustable knot, commonly used by climbers, cavers, and rescuers to control friction in a life-lining or belay system. To climbers, this hitch is also known as HMS, the abbreviation for the German term Halbmastwurfsicherung, meaning half clove hitch belay. This technique can be used with a special "pear-shaped" HMS locking carabiner, or any locking carabiner wide enough to take two turns of the rope.

<span class="mw-page-title-main">Multi-pitch climbing</span> Type of climbing

Multi-pitch climbing is a type of climbing that typically takes place on routes that are more than a single rope length in height, and thus where the lead climber cannot complete the climb as a single pitch. Where the number of pitches exceeds 6–10, it can become big wall climbing, or where the pitches are in a mixed rock and ice mountain environment, it can become alpine climbing. Multi-pitch rock climbs can come in traditional, sport, and aid formats. Some have free soloed multi-pitch routes.

In rock climbing, an anchor can be any device or method for attaching a climber, a rope, or a load above or onto a climbing surface—typically rock, ice, steep dirt, or a building—either permanently or temporarily. The intention of an anchor is case-specific but is usually for fall protection, primarily fall arrest and fall restraint. Climbing anchors are also used for hoisting, holding static loads, or redirecting a rope.

<span class="mw-page-title-main">Rope solo climbing</span> Type of solo climbing with protection

Rope-solo climbing or rope-soloing is a form of solo climbing, but unlike with free solo climbing, which is also performed alone and with no climbing protection whatsoever, the rope-solo climber uses a mechanical self-belay device and rope system, which enables them to use the standard climbing protection to protect themselves in the event of a fall.

<span class="mw-page-title-main">Dynamic rope</span> Rope designed to stretch under load

A dynamic rope is a specially constructed, somewhat elastic rope used primarily in rock climbing, ice climbing, and mountaineering. This elasticity, or stretch, is the property that makes the rope dynamic—in contrast to a static rope that has only slight elongation under load. Greater elasticity allows a dynamic rope to more slowly absorb the energy of a sudden load, such from arresting a climber's fall, by reducing the peak force on the rope and thus the probability of the rope's catastrophic failure. A kernmantle rope is the most common type of dynamic rope now used. Since 1945, nylon has, because of its superior durability and strength, replaced all natural materials in climbing rope.

<span class="mw-page-title-main">Grigri</span> Assisted braking belay device

A 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.

<span class="mw-page-title-main">Belay device</span> Mechanical piece of climbing equipment

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.

<span class="mw-page-title-main">Caving equipment</span> Equipment for caving and spelunking

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.

<span class="mw-page-title-main">Climbing gym</span> Indoor sports venue

A climbing gym is a gym dedicated to indoor climbing. Climbing gyms have climbing walls that can be used for leading, top roping, and bouldering. They sometimes offer training equipment to improve technique, strength, and endurance.

References

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  8. Head Rush Technologies. "Trublue Speed Auto Belay" . Retrieved 2023-09-14.
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