Tractel Blocstop BS - Composition of a Standard Supply; Technical Specifications

6
EN
The Blocstop™ type BS fall arrest device (g. 1)
is basically formed by a system of self-clamping
jaws (item g, g. 1) mounted in a zinc-plated
steel casing.
The unit is connected by its shackle (item e,
g.1) to an anchor point (item 8, g. 21) with a
sling.
So long as the wire rope (item b, g.1) moves
in the fall arrest device in the pulling direction
indicated by the arrow (item c, g.1), the jaws
automatically open and allow the wire rope to
slide. Conversely, as soon as the wire rope in the
fall arrest device moves in the opposite direction,
with respect to the pulling direction (item c, g.1),
the jaws immediately close on the wire rope and,
as with the TIRFOR
®
principle, clamp the wire
rope with a force proportional to the load.
To allow controlled descent of the load, the
Blocstop™ fall arrest device can be unlocked
by pulling on the stirrup (item d, g. 1) in the
direction of the arrow. This operation can only be
performed provided there is no load on the fall
arrest device. A return spring keeps the stirrup
in place against the fall arrest device (shown by
bold dotted line in g. 1).
The shackle (with its cotter pin) (item e, g. 1) is
mounted on the fall arrest device optionally.
3. Composition of a standard
supply
Each Blocstop™ fall arrest device is supplied
with this manual and an incorporation statement.
These documents are contained in a plastic bag
fastened to the unit.
The following options are available with the BS
fall arrest devices:
Standard supply Supply option
Without shackle
(item e, g.1)
With shackle
(item e, g.1).
Unlock stirrup
(item d, g.1)
With handle (item 1,
g.10) in place of stirrup
(item d, g.1) for models
15.301, 20.301, 35.30
only.
Table 1
NOTE: In this manual, operation of the fall
arrest device is described with stirrup; operation
is the same with handle.
4. Technical specications
• The technical characteristics of the Blocstop™ BS fall arrest devices are as follows:
Model WLL* (kg) W (kg) Øc (mm) St R (kg)
15.301 800 2 8,3 5 x 19 4 800
20.300 800 3,7 8,3 5 x 19 4 800
20.303 1 000 3,7 9,5 5 x 19 6 400
20.304 1 600 3,7 10,2 5 x 26 8 000
20.301 1 600 3,7 11,5 5 x 26 9 600
35.304 3 000 8,2 14,3 5 x 26 16 000
35.30 3 200 8,2 16,3 5 x 31 19 200
Table 2
WLL*: Working Load Limit for material’s lifting
and pulling.
W: Weight of fall arrest device.
Øc: Wire rope diameter.
R: Minimum tensile strength of wire ropes.
St: Structure of wire ropes.
The wire ropes (ordered separately) are supplied
on a reel with safety hook at one end (item A,
g.16) or with a sleeved and thimbled end (item
B, g. 16) on request.