I have seen videos with people doing jumps, flips and other crazy stuff, is this safe?
Gibbon Slacklines are to be used at your OWN RISK. Extreme slacklining and tricklining can be dangerous and these athletes have trained for years with ***appropriate safety equipment***. Know your limits and stay safe. Gibbon Slacklines are NOT intended for highlining and should never be set up higher than 3 feet from the ground.
For when you need life critical security, locking carabiners are the only way to go. Steel ones are highly recommended for highline applications.
Highline Specific Equipment
Need some gear to get started into highlining? We can help. First though, don't get yourself killed. Read our highline article and seek in-person training.<
Normally a rock climber can use a couple trademark techniques and go years without using advanced systems, this isn't the case with highlining. Highlining turns most of our rockclimbing rigging 90 degrees off of center and adds extra forces that we normally aren't worried about. Highliners also need to understand advanced rigging techniques and equipment to backup and supplement your normal slackline system because of the loads involved, which are much higher than recreational climbing equipment was designed to accomodate and still offer an adequate margin of safety.
... What do you need to know?
Rigging: To rig a highline you need to be fully capable at creating complex SRENE anchors that are built to EXPECT the normal worst case scenario loads. If you don't know what equalization and non extending anchors are, your in for a world of hurt unless you have a rigging mentor to create a foundation of understanding necessary to take it beyond that level. You also need to understand the physics behind slacklines. Slacklines can produce amazingly high loads on anchors, they have snapped fresh and well placed 3/8" bolts and have caused fully rated climbing cams to fail from being overloaded. Most slackers prefer to set bolts instead of climbing gear. Reason one is because good bolts are great for safety and multidirectional, reason two is that slacklines produce loads so high normal lead climbing gear might no longer be suitable for life saving duty, thus making that $60 cam no longer safe for lead climbing. This also isn't the place to learn to place bolts or what a good nut placement is, slacklines represent the worst load scenarios for bolts due to the angles involved. I'll sum it up by saying that the angle to the load essentially creates a levering force that multiplies the load. A 160 lbs slacker can easily create 1,600 lbs of tension just standing still on a slackline, when he takes a leashed, that load will jump higher.
A note on carabiners: Each and every carabiner manufacturer we talked to each recommended we never reuse slackline carabiners for life saving use; slacklines put a high static load which is rough on equipment which is often designed for sudden impact so they stretch during impact, then stretch back.
Under a slackline, that doesn't happen, it stretches and stays that way until you un-rig. Don't believe me? Set a slackline nice and tight, put someone on it, then try and open the gate on a carabiner, it won't open because the biner has stretch that tight against the gate. Bottom line, dedicate any of your gear that holds the main system tension for slacklines, if using a backup system that isn't tightly tensioned, that part could be reused for other purposes of course. We recommend you invest in some steel rescue carabiners for this reason; they are designed for higher loads, that and bolt hangers won't chew into them like they will do to aluminum while your surfing the line. Instead of carabiners some people also recommend industrial rigging equipment such as steel shackles that are rated for 20,000 lb test or greater. While I haven't personally felt the need for these just yet, they aren't a bad idea to look into. Anchoring gear: If your planning to place bolts, make sure that the landowner or access situation allows it. To place bolts, you'll need the usual bolting gear. As I already mentioned, 3/8" bolts have been snapped so there is a strong preference for large 1/2" bolts, 3 on each end, all placed where they can easily be equalized and are all in solid rock. If bolts are forbidden bite the bullet and consider dedicating whatever climbing gear you need to rig the anchors as full time highline gear. Basically over rig the hell out of the anchors because it will be seeing 1500-2000 lb of tension or possibly more depending on length and how you bail onto it and you need a safety margin well over that amount. <
這裡的ground fall，可否請說明您的見解。我以為應該只是攀登者墜落時touch the ground，碰撞地面的小意外，一般確保不當，繩子太鬆、確保失誤滑出太多繩子，沒有適時確保制止墜落，又或確保支點失敗，而墜落距離又不夠，以致墜落碰撞到地面，但這種情況，除非，情況很糟完全失控，器材在墜落前就失效，否則都有一定的緩衝煞車作用，常發生的多半是小意外。這種ground fall和墜落係數與衝擊力無直接關係。
至於繩子受力, 如果使用同樣繩子和確保系統, "大致上" 只與 "墜落係數" 和 "體重" 有關, 許多攀岩課程都會提到.
每個先鋒確保的新手都會很驚訝, 先鋒為什麼前幾個快扣掉下來, 也沒掉多遠, 力量會那麼大.
這有網路上有許多資料可參考, 隨便 google "fall factor" 一下, 例如... http://www.cwu.edu/~curtiswd/PapersAndPreprints/cmj135-140.pdf
...When climbers read about this test, a common first reaction is “Well, that test only uses a 5-meter fall. What happens if I take a longer fall?” But the point is, the fall used in the test has a fall-factor 2. This is the most severe fall that can occur in normal roped climbing. Since, as was shown above, *the maximum force on the mass depends only on the fall-factor* and not on the actual distance fallen....