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When a belayer needs to transfer the load from their harness to the anchor to escape the system: a rope grab (mechanical or friction knot/Prusik) is placed on the load line towards the load, rope is terminated on the rope grab (or the tails of accessory cord are used when using a cordelette with a Prusik as a rope grab) and runs back to the ...
The mechanism on chain grabs operates in the same way as on rope grabs. The chains are connected to ropes on the crane by (e.g. bordeaux) couplings which allow rotation. A linked chain requires a much small diameter pulley than the equivalent rope which makes a smaller, more compact, design of girder.
The rope to be pulled is passed through a pulley, and a Prusik is tied on the loaded side. When the rope is pulled, the Prusik rides against the pulley, and the rope slides through it; but when the rope is relaxed, the Prusik slides away from the pulley and grabs the rope. Thus, the combination acts as a ratchet (or Progress Capture Device (PCD)).
A grab or mechanical grab is a mechanical device with two or more jaws (sometime clamshell-shaped), used to pick things up or to capture things. Some types include: Roundnose grab; Clamshell grab; Orange-peel grab in Dutch and German they are called poliep grijpers/ Polypengreifer = "polyp grabs". There are different ways of open/close the grabs:
Rope access technicians descend, ascend, and traverse ropes for access and work while suspended by their harnesses. Sometimes a work seat may be used. Sometimes a work seat may be used. The support of the rope is intended to eliminate the likelihood of a fall altogether, but a backup fall arrest system ( Personal protective equipment ) is used ...
Here’s what else weighs on my mind in this "Topp Rope" view of college football: Brian Kelly headed for heat in Year 4 at LSU This charade of LSU being a playoff contender finally, mercifully ...
Chogajiboong (a straw roof) is made with byeotjib (rice straw), eulalia or reed, but generally made with byeotjib. Byeotjib protects residents from the sun in summer and keeps them warm in winter, because it is empty inside. Moreover, rain falls down well and hardly soaks through a roof because it has a relatively smooth surface.
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