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Ropes and knots. Yonten Norbu Samtse College of Education. Overview. Definition Types Different types of knots Uses Demonstration conclusion. Definition and Advantages. Rope: it is a very strong thick string made by twisting thinner strings, wires, etc. together.
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Ropes and knots • YontenNorbu • Samtse College of Education
Overview • Definition • Types • Different types of knots • Uses • Demonstration • conclusion
Definition and Advantages. • Rope: it is a very strong thick string made by twisting thinner strings, wires, etc. together. • Knot: it is a join made by tying together two pieces or ends of string, rope, etc. (oxford Advanced Learner’s Dictionary, 2005) Advantages: • Portable • Cheap • Easy to make the knots • Very strong • Easily available
Different types of rope knots. • Whipping. • Reef knot. • Timber hitch. • Clove hitch. • Fishermen’s knot. • Sheet bend. • Sheep shank. • Bowline . • Thief hitch. • Thumb knot
Whipping • Whipping is a good start if you want to learn about knotting. • Use a thick thread, with different colors at each end of the rope. • We use in making the carrying the rope very easily. • Normally used to secure an eye splice or to protect the bitter end of a rope from chafe. • Used to protect the end of a rope from chafe. Can only be used on stranded rope.
The Reef knot • It is used to join two dry ropes of the same thickness. • It will not slip, and can be easily untied when wanted. • Do not confuse it with the "Granny" knot. It is the only knot used in First Aid work.
Timber hitch • Used to tie on the poles. • Is a very strong knot. • Can be used in dragging fire woods during camping. • There are of two kinds full timber hitch and half timber hitch.
The Clove Hitch • Use to attach a rope to a pole, this knot provide a quick and secure result. • It rarely jams, and can in fact suffer from the hitch unrolling under tension if the pole can turn. • Often used to start and finish lashings. • With practice, this can be easily tied with one hand - especially useful for sailors! • A knot that is easy to make. Usable when you want to moor a boat. Do not use to tie something to a square post as it can easily come off.
Fishermen’s knot • For stiff ropes and cords you shall use the Fisherman's Knot. • You should make it double on cords of nylon, or it will not last. • The fisherman's knot is used by fishermen to tie silkworm gut together. I • t is easily untied by pulling the two short ends, but it never slips.
The Sheet Bend • The Sheetbend is a knot that you use to tie two ropes together. • Good both for thick and thin ropes. Easy to untie. • Use the Sheet bend (Becket Hitch) when you hoist a flag, and the loop already exist.
Sheep Shank • The Sheepshank is a shortening knot, which enables a rope to be shortened non-destructively. • It is sometimes necessary to shorten a rope temporarily and not desirable to cut it, and the sheep-shank knot solves the problem. • It is used by the sailors, who do not believe in cutting ropes. • It will stand a tremendous strain without slipping, but will loosen when held slack, and can be untied by a quick jerk of the two outside ropes forming the bights. • Tip. Never cut ropes to shorten them!
Bow Line • The bowline, a loop that will not slip, to tie round a person lowered from a building, etc. • Fixed loop, very safe. You can use it when climbing and lifesaving etc. • If your life depends on this knot, you should do an extra knot to make it safer. • Often learnt by thinking of the end as a rabbit, and the loop as its hole, and as Elma Fudd would say: The rabbit grows up, out of his hole, wound the back of the tree, and back down into his burrow!
Thief Hitch • The Thief knot resembles the Reef knot at a casual glance. • Note that the ends of the Thief Knot come off opposite sides of the knot. In the Reef knot, they come off the same sides. • However, the Thief knot has no strength whatsoever, and will slip under tension. • Tip. Only use this knot for tricks. NEVER use it where life and limb are at risk.
Thumb knot (Overhand Knot) • This is the simplest knot of all. It is commonly use to temporarily "stop" the end of a fraying rope. • The overhand knot is commonly tied in a bight formed at the end of a rope, forming the Overhand Loop.
References : • Retrieved on 10th September, 2009 from http://clipart.usscouts.org/.../knots/ • Retrieved on 8th August,2009 from http://www.42brghtn.mistral.co.uk/knots/42ktmenu.html Hornby, A.S. (2005). Oxford advanced learner’s dictionary. New york: Oxford university press.
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