Trucker's hitch

src: i.ytimg.com

The trucker hitch is a compound node commonly used to secure payloads on a truck or trailer. This general arrangement, using loops and rotating the rope itself to form rough and tackle blocks, has long been used for stress lines and is known by many names. Knot writer Geoffrey Budworth claims that the knot can be traced back to a time when charterers and hawkers used horse-drawn carriages to move their belongings from place to place.

Video Trucker's hitch

Variations

The portion of the driver's different obstacles in the following variation is the method used to form loops whose ends work past them to produce mechanical gain. Different methods of forming loops affect the ease and speed of binding and releasing and stability of the final product.

Variations are presented in order to improve stability.

Sheepshank style circle

This node version uses a construction like a sheep, in this kind of application also known as the bell ringer node, to form a circle. This is faster made than fixed loops, but less reliable. This is avoided in important applications (such as securing the load on a truck) as it can fall under too little load or too much load, and can be reversed if not clothed properly. However, this node can be made secure by adding Half Hitch by using the Sheepshank top board. This driver's obstacle form is at least impossible to jam, easy to detach once the tension is released. Different sources show little variation in the way the sheep section is shaped and dressed.

Threaded knot

The loop formed in this version is a simple Loop Overhand Loop or variation using several rounds of string to form a loop eye. If an additional loop is used to form the eye, then it tends to release the bond. To prevent loop closure under load, the loop must be formed by the working end of the rope (which will pass through the loop). If the tip stands past the loop, it will close under the load.

Fixed circle

The most reliable general variations use a fixed loop, such as an alpine butterfly loop, artillery loop, eight-digit loop, or another of many appropriate node nodes. If the loop remains used repeatedly to bind the hitch trucker in the same part of the rope, excessive wear or other damage can be suffered by the loop section working with the final slides.

Maps Trucker's hitch

Troubleshooting

In tightening the hitch trucker, the tension can be increased effectively by repeatedly pulling sideways while preventing the tail end from slipping through the loop, and then the cinching knots tighten as the lateral force is released. This is called "sweating".

Once tight, the driver's obstacle is often secured with half hitch, usually slipping as it is easily removed and to avoid the need for access to the end of the rope, although a safer settlement, such as two and a half hitches, can be called for. Under heavy loads, half-finishing hitches can get stuck, especially if not slipping; the trouble of releasing it can be exacerbated by the fact that the knot is usually still under pressure when it is released.

src: i.ytimg.com

Mechanical and frictional advantages

All general variations of the truck hitch using the loop at the rope stand and the anchor point as the emergency pulley for theoretically gain mechanical superiority of 3 to 1 while pulling on the work piece.

Sometimes there is confusion about how much theoretical mechanical advantage is provided by the driver's impediment. If the driver's obstacle should be used as in the pulley diagram on the right, to lift the load from the floor, the theoretical mechanical gain will only be 2: 1. But in general use driver hitches, static hooks, rings, or rails, serve as bottom pulleys, and ropes at the top of the load is the tightened part. Thus, the standing portion of the rope is represented by the top anchor point in the diagram, and the theoretical ratio is 3: 1 when the working end is tightened. That is, in a frictionless system, each set of forces assigned to the work section will produce 3 units in the rope section which stands above the load. In typical usage of the hitch trucker, where it is used to tighten the rope above the load, when the tip is secured to the loop of the Trucker hitch and release, the tension in the two rope segments around the ring will rise. 50%, unless the strap loosens while being tied, in which case the voltage can drop to any value or even zero if enough slack is allowed. But when the driver hitch is used as in the diagram, after binding, the load at the attachment point above the upper pulley will drop to 400 pounds and the tension on the two lines leading to the lower pulley will not change.

Theoretical considerations aside, in the real world using the mechanical advantage of the driver hitch is significantly less than the ideal case due to the frictional effect. Friction has been reported to reduce the mechanical advantage from 3 to 1, to less than 2 to 1 in many cases. One of the advantages of friction in truck hitches, compared to hypothetical pulley-based systems, is that it allows obstacles to be held tight with less power while the working end is guaranteed.

src: cdn.instructables.com

Cultural reference

The knot of the truck string is described by the Ylvis comedy duo in their 2014 song of the same name. The lyrics and videos pretend (in a funny way) to show how to tie a knot.

src: i.ytimg.com

See also

• Load secures
• List of knots

src: harvardfop.github.io

References

src: i.ytimg.com

External links

• Grog. "Hitch Trucks". Knot Animated . Retrieved February 12 2013 .

Source of the article : Wikipedia