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In rock climbing, a crack climb is a type of climbing route that follows a system of crack(s) or fissure(s) that the climber uses to ascend the route. The width of the crack dictates the techniques needed, and crack-climbs are further differentiated by the body parts that can be 'jammed' into them, such as finger cracks (the narrowest), hand/fist cracks, arm cracks, and body (also called ...
Anchors should be redundant, meaning that the overall anchor will still be sufficiently strong if any individual anchor were to fail. Selecting independent locations for the individual anchors would make an anchor redundant. This may mean using distinct boulders, crack systems, or objects for the placement location of each individual anchor.
A A-grade Also aid climbing grade. The technical difficulty grading system for aid climbing (both for "original" and an adapted version for "new wave"), which goes: A0, A1, A2, A3, A4, A5 and up to A6 (for "new wave"). See C-grade. Abalakov thread Abalakov thread Also V-thread. A type of anchor used in abseiling especially in winter and in ice climbing. ABD Also assisted braking device. A term ...
Then the tooth slides off the end of the pallet, beginning the cycle again. Neither the anchor escapement nor the deadbeat form, below, are self-starting. The pendulum must be given a swing to get them going. Pendulum and anchor escapement. (a) pendulum rod (b) pendulum bob (c) rate adjustment nut (d) suspension spring (e) crutch (f) fork (g ...
Created Date: 8/30/2012 4:52:52 PM
Attempts have been made to increase the safety of bridges with pin and hanger assemblies by adding some form of redundancy to the assembly. Retrofits that add redundancy to pin and hanger assemblies include adding a "catcher's mitt"—a short steel beam attached to the bottom of the cantilevered girder that extends out beneath the suspended girder to "catch" the suspended girder should ...
Lead climbing (or leading) 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' (or 'belayer') remains at the base of the route belaying the rope to protect the 'lead climber' in the event that they fall.
A varied version of that escapement has been used from the 1860s inside electrically driven pendulum clocks, the so-called "hipp-toggle". [77] Since the 1870s, in an improved version the pendulum drove a ratchet wheel via a pawl on the pendulum rod, and the ratchet wheel drove the rest of the clock train to indicate the time. The pendulum was ...