Ropes Systems (ch.8) Flashcards
Two line rope system compliment (truck);
X12
1.One 300 ft low stretch 1/2 in static kernmantle lifeline, white in color with blue or red stripe, stored in red nylon bag.
2. One 200 ft low stretch 1/2 in static kernmantle rope, orange in color, stored in orange nylon bag.
3. Three class 3 harness/ one small & 2 large
4. 2 8mm accessory cords 20’ (leh)
5. 2 stainless steel brake bar racks, with six aluminum bars
6. Eight steel “D” shaped carabiners
7. Two 8mm x 6 foot accessory cord
8 two 8mm x 5 foot accessory cord
9. 2 pieces of blue/yellow/red webbing (5ft, 12ft, 20ft)
10. 2 inspection record sheets
11. One 2 inch x 7ft anchor strap with d rings
12 two pieces of yellow multi loop webbing 3 ft.
The high strength core (____) can carry up to ___% of the load.
Kern / 90%
Lifeline rope is rated at ______ pounds and weighs ___ pounds per 100’. Which meets or exceeds the NFPA ____ standard for one and two person rescues
10,000 pounds
7 pounds/ NFPA 1995
_______ strength is the rated strength of the rope when pulled in a straight line, with no knots, to a point where it can be expected to break
Tensile strength
To determine the safe working load of a rope, you divide the manufacturers rated tensile strength by the NFPA safety factor of _____
15
Lifeline rope = ____ pound working load. Which exceeds the NFPA standard of _____ pounds for two person rope
666 pound working load
600 pounds standard for 2 person rope
The best way to remove dirt particles from a rope is to place the rope in a mesh bag or a pillowcase, place in a washing machine on gentle cycle and wash in cold water. Use a mild chemical free soap such as,
lifeline cleaner, Ivory Snow or Woolite
The KM -lll static kernmantle rope has a melting point of _____ degrees Fahrenheit
450 degrees
Mark the midpoint and the ends of the rope. Use only the following markers, as other markers will weaken the fibers of the rope.
Carter MARKS-A LOT, Stanford SHARPIE and Binney-Smith MAGIC MARKER.
Log the ropes on form ____when; x4
F-975
As soon as received
All training
Emergency incidents
Monthly checks
The end of the rope s(all be secured to the bottom of the bag by tying a ______
Figure eight stopper
The webbing used by LAFD is _____ and _____ rated at ______ pounds
1” spiral weaved tubular and folded over flat
4000 pounds
Sizes;
Blue
Yellow
Red
5
12
20
Carabiners used in the LAFD rope rescue kits are steel “D” shaped carabiners, rated at ______ pounds.
9000
Which is the stronger side of caribiner?
The spine
The brake bar rack comes with six aluminum bars attached to it. The welded eye, on one end, is used for attachment and is rated at _______pounds
10,000 pounds
Brake bar rack procedure;
First pass the rope over the _____
Training groove
For a single person load (rappel or lower), start with _____bars. For a two-person loads, start with ____bars.
4 one person
5 two person
Brake bar;
The maximum would be six, and the minimum should never be less than _____during any operation.
3
Rappelling or lowering operations over _____feet a brake bar rack should be used, due to the twisting of the rope.
75
The strength of the rope is restored fully when placed over a turn of a pulley that is at least ____ times the diameter of the rope
Four times
LAFD carries two types of pulleys:
2 1/2 inch aluminum prusik mining and 4 in. Stainless steel
We have had a problem with the keepers breaking off. One-way to avoid this is to wrap the keeper with _______, however if it does break off or there are any loose ends, then tie it off with an ______
Electrical tape
Overhand knot
_______is measured by the percentage of rope strength that remains after a knot is tied in the rope.
Knot efficiency
Figure eight stopper knot efficiency = %
75%
Figure eight follow through knot efficiency =%
80%
Figure eight on a bitght knot efficiency =%
80%
Figure eight bend (follow through) knot efficiency =%
80%
Double figure eight on bight knot efficiency =%
80%
double overhand bend or double fisherman knot efficiency =%
80%
Accessory cord is made from nylon kernmantle rope, ranging in diameters from ___mm to ___mm. The lafd uses ____ mm prusik loops on all 1/2 ropes
6mm to 10mm
8mm
When accessory cord is tied into prusik loops, the cord used should not be less than ____inch, or more than ____the diameter of the rope it is to be tied on.
1/2 to 2/3
When using tandem prusiks , the prusiks must be of different lengths, one ___ ft and one ___ ft
5ft and 6ft length
Water knot/ overhand knot efficiency =%
65%
Tensionless hitch or no knot efficiency =%
100%
Bowline knot efficiency =%
65%
Butterfly knot efficiency =%
75%
The load releasing hitch (LRH) utilized by the LAFD is constructed out of 8-mm accessory cord ___feet long.
20ft
Building load releasing hitch;
Take both lines that exit the Munster hitch and wrap around the line between caribiners ___ to ___ times
3 to 6 times
Pickets; the pickets should be pounded ___ ft into ground at a ___ degree angle.
2ft
15 degrees
When using fence post as anchor make sure post has ____
A cap due to water buildup
Single pocket = ___ pounds
700
1-1 pocket = ____ pounds
1-1-1 = ___ pounds
1400
1800
2-1 pocket = ____ pounds
3-2-1 = ____ pounds
2000
4000
Tending the tandem prusik belay;
The ___ hand is one furthest from the anchor point
This hand will hold the belay line and put a ___ turn in the line
Lead hand
Z turn
Lafd saftey thoughts
Never get closer than ___ feet from edge without being tied off
5ft
When wearing PDF leave backflap out or tuck in?
Tuck in
Passing knot
Main line = 6” from bar
Belay = 6-10” from prusik
