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Tricams
A Tricam is a passive or active device consisting of a shaped aluminium block attached to a length of tape (webbing). The block is shaped so that pulling on the tape makes it cam against the crack, gripping the rock tighter. It requires careful placement so that it does not loosen when not loaded. It is generally not as easy to place or remove as a SLCD but is much cheaper and lighter, and is the only thing that will work in some situations like quarry drill-holes and limestone pockets. The smaller sizes can work well in old piton scars. They can also be used Passively as nuts.
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Senin, 26 November 2007
Climbing equipment
Rope, cord and webbingRope and Webbing
Climbing ropes typically consist of a core (kern) of long twisted fibres and an outer sheath (mantle) of woven coloured fibres (hence the term kernmantle construction). The core provides about 80% of the tensile strength, while the sheath is a durable layer that protects the core and gives the rope desirable handling characteristics. The ropes used for climbing can be divided into two classes: dynamic ropes and static ropes. Dynamic ropes have a certain amount of elasticity and are usually used as belay ropes. When a climber falls, the rope stretches, reducing the maximum force experienced by both the climber and his equipment. Static ropes are much less elastic, and are usually used in anchoring systems. They are also used for abseiling (rappeling) as they reduce bounciness and make it easier for a person to descend.
Webbing is flat rope: it has no core. It is a versatile component of climbing equipment. Modern webbing is often made from nylon, and is quite strong—one-inch (25-mm) tubular climb-spec nylon webbing has a tensile strength of about 20 kN (4000 pounds)[1]. Webbing is usually tied (using a water knot or beer knot) or sewn into a loop and is then known as a runner or sling.
Runners have many uses, including anchor extension or equalisation, makeshift harnesses, carrying equipment and as a component of quickdraws.
Most beginning climbers do not invest in a climbing rope until they've had a few chances to see if they like the sport. Climbers who only climb at a climbing gym may not buy their own ropes, as most gyms have set routes and supply the ropes at each climbing station.
Climbing ropes typically consist of a core (kern) of long twisted fibres and an outer sheath (mantle) of woven coloured fibres (hence the term kernmantle construction). The core provides about 80% of the tensile strength, while the sheath is a durable layer that protects the core and gives the rope desirable handling characteristics. The ropes used for climbing can be divided into two classes: dynamic ropes and static ropes. Dynamic ropes have a certain amount of elasticity and are usually used as belay ropes. When a climber falls, the rope stretches, reducing the maximum force experienced by both the climber and his equipment. Static ropes are much less elastic, and are usually used in anchoring systems. They are also used for abseiling (rappeling) as they reduce bounciness and make it easier for a person to descend.
Webbing is flat rope: it has no core. It is a versatile component of climbing equipment. Modern webbing is often made from nylon, and is quite strong—one-inch (25-mm) tubular climb-spec nylon webbing has a tensile strength of about 20 kN (4000 pounds)[1]. Webbing is usually tied (using a water knot or beer knot) or sewn into a loop and is then known as a runner or sling.
Runners have many uses, including anchor extension or equalisation, makeshift harnesses, carrying equipment and as a component of quickdraws.
Most beginning climbers do not invest in a climbing rope until they've had a few chances to see if they like the sport. Climbers who only climb at a climbing gym may not buy their own ropes, as most gyms have set routes and supply the ropes at each climbing station.
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