Lesson Plan 6 Ropes and Knots Flashcards
When damaged or older than ___ ____ the rescue rope is cut into ____ sections and designated as ____ ___.
6 years; 75’; utility rope
What is the one type of rope we use?
Nylon kernmantle
Rope Data for Utility Rope
Kernmantle
75’ lengths
1/2” diameter
Rope Data for a Lifeline
Rescue Kernmantle 1/2" diameter 200 / 300 ft lengths 9000 lb breaking strength 600 lb working load (15:1 safety factor) Melts at 480 degrees F 2 % stretch under normal loads (200 lbs)
Rope Data for Nylon Webbing
Tubular (appears flat but is hollow)
4000 lb breaking strength
Rope Data for Prussik Cord
Breaking strength of 2800 lbs
8 mil diameter
Various colors and lengths
What is the standing part
The part of the rope that takes the load; hoisting, pulling etc
What is the running part
The part of the rope used to form the knot, or the free end of the rope
What is a bight
A bend in the rope keeping the sides parallel
What is a loop
Formed when crossing the sides of a bight
What is an eye splice
A permanent loop in the end of a rope
What is a tail or crown splice
The end of the rope spliced into itself
What is anchored or snubbed
Rope fastened to some stationary object
How much do the various knots weaken a rope: Square knot Figure 8 knot Clove hitch Short splice
50% less
20% less
35% less
20% less
A square knot is used for:
joining two ropes of the same size
Clove hitch is used
To hoist and secure equipment, to construct an improvised deluge and to secure a halyard
What is a round turn and two half hitches used for
to snub a rope to an object
secure a ladder anchor
What is a running knot used for
Hoist hose and nozzle
What is a slip knot used for
Secure hose bundles
How many arm lengths are used to chain link a utility rope
6 arm lengths
Usage for figure 8 knot
Stopper knot, to prevent rappelling off the end of the rope
Usage for figure 8 on a bight
To form an eye anywhere in a line; for anchoring, towing etc; unties easily once under a load
Usage for figure 8 follow through
to secure a line to an anchor or to join two lines of equal or unequal diameter
Usage double loop figure 8
To be used for anchoring systems having 2 or more points
When is the rope inspected
After each use
What are the 4 points to look for when inspecting rope
Dirt/foreign particles imbedded in rope fibers
Spot abrasions, broken fibers, brittle fibers
Soft spots
Inconsistencies in the rope diameter
How do we identify our ropes
Both ends shall be tagged with: In-Service date A/B ends Length Company # Identification #
Ropes are to be inventoried for how long
6 years
What is the a running knot also know as
Hose knot
