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Prac Assessment > Ropes, Knots & Harnesses > Flashcards

Ropes, Knots & Harnesses Flashcards

1
Q

Advantages of a good knot

A

T - Easy to TIE

R - Easily RECOGNISED when correctly tied
U - Is easy to UNTIE
S - Should not SLIP excessively or over tighten
S - Will not significantly reduce the STRENGTH of the rope when tied correctly

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2
Q

Knot Protocol:

A

S - Ensure the correct knot is SELECTED for the task
T - Place TENSION on the line to set and TIGHTEN the knot
R - All knots must be REMOVED / RELEASED from the line after use
I - All knots must be INSPECTED after tying. Look away and recheck
C - All knots must be CHECKED by another firefighter (LRL only)
T - All knots must have no less than 150 mm TAIL after tightening

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3
Q

Deterioration can be caused by

A

C - Chemicals: Bleaches, phenols & alkalis
A - Abrasion: Common in LRL, dragging the line across the ground, standing/walking on the line causes grit or sharp particles to enter the line > damaged filaments > loss of strength
M - Mechanical: impact from solid objects
S - Shock Load: sudden force or pulling on a rope over a small time
U - Ultra violet light: exposure to the sun for an extended period of time
E - Extreme heat: exposure to fire

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4
Q

Cleaning

A

Rope line must be cleaned after use by soaking and agitating in a container of warm water then hung out to dry away from the direct sunlight & heat.

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5
Q

GP Rope: Colour

A

White when new

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6
Q

GP Rope: Diameter

A

12mm

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7
Q

GP Rope: Construction

A

3 strand right hand lay

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8
Q

GP Rope: Fibre

A

Polyester

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9
Q

GP Rope: Melting point

A

250 C

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10
Q

GP Rope: Min Breaking Strength

A

2200kg/22kN (when new)

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11
Q

GP Rope: Safe working load

A

450kg

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12
Q

GP Rope: Length

A

30m (Div A)

10, 20 & 30m (Div B)

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13
Q

Name GP Knots and their uses

A

Half Hitch - Prevents knot from unravelling

Overhand knot - Stopper knot to prevent a line unreeling through a pulley

Clove Hitch - Secures end of rope to an object & when hauling small gear aloft

Rolling Hitch - Secures small gear (extinguishes, ceiling hook, hoses) as the design prevents slip in one direction

Round turn two half hitches - secures a line to a spar or any round object. Doesn’t jam under load

Double sheet bend - joins ropes of different diameters

Bowline - a secure loop at the end of a rope that doesn’t slip under load, used for a raising & lowering toolkits and other small gear

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14
Q

LRL Div A - Colour

A

Orange with blue fleck

Blue with orange fleck

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15
Q

LRL Div A - Diameter

A

13mm

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16
Q

LRL Div A - Length

A

50 meters (orange) and 25 meters (blue) on primary and rescue appliances

17
Q

LRL Div A - Working load limit

A

272kg max
15:1 safety factor
One person load per line

18
Q

LRL Div A - fibre

A

Nylon 66 core/polyester sheath

19
Q

LRL Div A - melting point

A

220 C approx

20
Q

LRL Div A - Elongation

A

3% at 80 kg load

21
Q

LRL Div B - Colour

A

Orange with blue fleck

Blue with orange fleck

22
Q

LRL Div B - Diameter

A

13 mm

23
Q

LRL Div B - length

A

50m, 100m and up to 200m at rope Rescue locations

24
Q

LRL Div B - Work Load Limit

A

410kg maximum

10:1 safety factor

25
Q

LRL Div B - Fibre

A

Nylon

26
Q

LRL Div B - Melting Point

A

Approx 220 C

27
Q

LRL Div B - Elongation

A

2-4%

28
Q

LRL Construction

A
  • Kernmentle construction
  • Consists of a ‘core’ and sheath
  • Has the ability to elongate under load which absorbs shock loading which would normal long break the line or injure person attached
29
Q

LRL Knots and uses

A

Figure 8 stopper: forms the basis of the figure 8 group of knots, can also be placed on the running end as a stopper knot

Figure 8 on the bight: common figure 8 knot incorporating a non-slip loop that can be used for the attachment to a safety harness or stretcher

Figure 8 follow through: connects line to an object where a loop cannot be thrown over

Double fishermans: ensures strong no slip joint between 2 lines of equal diameter without significant loss in strength

Butterfly knot: used as a mid-line attachment point or to isolate a damaged selection of rope. 3 Way loading at standing end, running end and loop

30
Q

Karabiners

A
  • load must be supported along the major axis
  • must not be cross or tri-loaded (don’t load the gate)
  • locking sleeve must be at its lowest point when closed
31
Q

Harnesses (Petzl Full Body)

A
  • Dorsal attachment D: fall arrest
  • Sternal attachment D: fall arrest
  • Ventral attachment D: fall prevention
  • Waist side Attachment D: work position, use in pairs
  • Soft attachment point: connects chest harness karabiner to waist belt
  • Equipment loops: don’t secure persons
  • Fall Arrest Lanyard Connect Holder: stores lanyard hooks when not in use
  • Adjustable leg loop to waist belt straps: allow length of leg loop to waist belt straps to be adjusted to remove slack

Prac Assessment (2 decks)

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