Petzl NAVAHO SIT FAST: FALL ARREST

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NAVAHO SIT / NAVAHO SIT FAST / TOP / TOP CROLL C79502-C (200907)

Adjustment and suspension test

Your harness must be adjusted to fit snugly

to reduce the risk of injury in case of a fall.

You must move around and hang in the

harness (suspension test) from each

attachment point with your equipment to

verify that the harness fits properly, provides

adequate comfort for the intended use and

that it is optimally adjusted.

10F.

10F. Initial dorsal adjustment

This adjustment should be done only

once when putting on your harness

for the first time. Have another person

help you do it.

Slide the strap retainer so that both

layers of webbing are taut between the

two buckles, (2) and (9) (no slack).

Be sure to neatly stow the excess

webbing (flat - no loops of slack) in the

strap retainer so that it doesn’t interfere

with your work.

Adjust the position to suit your

individual body shape and size, position

the DoubleBack buckle at the level of the

shoulder blades.

10E. Adjust the shoulder straps. Stow the

excess webbing using the strap retainer on the

shoulder strap.

10D. Fasten the FAST buckles and adjust the leg loops. Be careful of

foreign bodies which can impede the operation of the FAST buckles

(such as pebbles, sand, clothing...). Check for correct locking.

- Short ends: use the

retainers in front of the

adjustment buckles.

- Long ends: pass them through

the lateral rings then through the

retainers behind the rings.

10C. Adjust the belt by pulling on the belt straps.

Stow the excess webbing neatly using the strap

retainers (flat against the waist belt).

10B. Position the shoulder

straps on the shoulders.

FALL ARREST

Diagram 10. How to put the harness on

Open the FAST buckles on the leg loops.

10A. Spread the shoulder straps

apart, grasp the harness by the

belt and slip both feet through

the leg loops.

10A. 10B. 10C. 10D. 10E.

K

L

Full body harness for fall arrest,

component of a fall arrest system

in accordance with the EN 363

standard (personal fall arrest

systems). It must be used in

conjunction with EN 795 anchors,

EN 362 locking carabiners, EN 355

energy absorber, etc.

11A. Sternal attachment point

Use only this point to attach a

fall arrest system (for example

a mobile fall arrester, an energy

absorber, or other system

described in the EN 363 standard).

For ease of identification, this point

is marked with the letter ‘A’.

Clearance: amount of free space

below the user

The clearance below the user

must be sufficient to prevent the

user from striking any obstacle in

case of a fall. Specific details on

calculating clearance are found in

the technical notices for the other

components (energy absorbers,

mobile fall arrester, etc.).

ROPE ACCESS

M

CROLL ventral rope clamp EN 12841: 2006

Field of application

The EN 12841: 2006 CROLL

rope clamp is a type B rope

adjuster used to ascend the

work rope.

ATTENTION, it must be used

with a type A backup device

on a second (safety) rope

(e.g. ASAP mobile fall arrester

for rope).

The CROLL ventral rope clamp

is not suitable for use in an

EN 363 fall arrest system.

Rope diameter

Use a 10-13 mm EN 1891

type A semi-static kernmantel

rope.

ASAP

EN 353.2

Fall arrest systems Example:

11A.

Diagram 11.

EN 361: 2002 fall

arrest harness

1 2 3

Removing the rope

Move the device up the rope while pulling

the trigger/safety catch down and out.

1

2

capable of damaging it (e.g. sharp

edge, rough surface, etc).

- The rope must be able to slide

freely through the CROLL. Beware

of situations that can impede sliding

(e.g. knot or worn/damaged section in

the rope, etc.).

- Do not forget to tie a stopper knot in

the end of the rope.

Diagram 14. Rope climbing

- Work rope: Use the CROLL and

another hand rope clamp (e.g.

ASCENSION handled rope clamp) with

a foot-loop. Always attach yourself

to the second ascender with an

appropriate lanyard.

- Safety rope: use a type A device.

JANE /

SPELEGYCA

Example :

ASCENSION

FOOTPRO

of the cam (pebbles, mud, vegetation,

cordage, slings, clothing, paint, etc.).

- BEWARE of catching the safety

catch in clothing and webbing.

- The rope between the CROLL and

the anchor point must always be taut.

The user must always stay below the

anchor point of the rope.

- Shock-load absorption by the rope:

do not forget that it is the rope which

absorbs energy in the event of a fall.

The closer you get to the anchor

point, the more the energy-absorbing

capacity of the rope diminishes,

eventually becoming practically zero.

- Protect the rope from anything

Type B

rope

adjustment

devices

Working line

13C. Operational check

Before each use, to verify correct

orientation on the rope and

functioning of the device, a test must

always be carried out with the user

self-belayed.

Push the CROLL up the rope. It must

slide easily up the rope. Pull it down

to verify it grips the rope.

13D. Precautions

- Close the CROLL’s cam when not

in use because equipment or other

objects can become stuck in the

device if left open.

- ATTENTION, do not allow foreign

objects to interfere with the operation

Safety line

Type A

rope

adjustment

devices

13B. Moving the

CROLL down the rope

(exceptional situation)

Move the CROLL a short

distance up the rope

and simultaneously

push down on the cam

with the index finger

to disengage the teeth

from the sheath of the

rope. Do not manipulate

the trigger/safety catch

because this creates

a risk of involuntary

opening of the cam.

Diagram 13. Principles of

operation

13A. Ascending

The CROLL is a device for ascending the work

or access rope. It grips the rope when loaded

in a downward direction and slides easily when

moved up the rope.

The teeth push into the sheath of the rope,

engaging the cam and causing the device to jam

on the rope. Slots in the cam allow mud, etc. to

be evacuated.

1 2

Diagram 12. Installation on the rope

Pull the trigger/safety catch down and out with the

thumb and index finger. Until it locks in place against

the body of the device. The cam is thus held open.

Put the rope into position. Push on the safety catch

until the cam swings into place against the rope.

The safety catch helps prevent involuntary opening

of the cam.

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3

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