Description of cobra
®
cabling
TENDER SPECIFICATION TEXT (TEMPLATE)
cobra tree cabling system
Supply and install a non-invasive, shock-absorbing
breakage cabling system, e.g. cobra
®
or a similar
system, in accordance with the manufacturer’s spec-
ifications for basic branch diameters up to 40/60/80
cm (16/24/32 in.) with a minimum tensile strength of
2t/4t/8t and a service life of 8/12 years.
A cobra tree cabling system consists of:
• 1 hollow braid polypropylene cable
• 2 end caps
• 2 expansion inserts
• 2 anti-abrasion hoses
• 1 shock absorber*
* Do not use for static breakage cabling systems, load/
support cabling systems or connection lengths of more than
8 m (26 ft.)!
All components of the system must be designed specically accord-
ing to the needs of the tree and the situation-related requirements.
Note
mini 2t 4t 8t ultrastatic
Cable break load 600 daN 3,450 daN 5,300 daN 10,900 daN 9,000 daN
Material Hollow braid
polypropylene
rope
Hollow braid
polypropylene
rope
Hollow braid
polypropylene
rope
Hollow braid
polypropylene
rope
Dyneema hollow
braid rope
Cable diameter 8 mm (0.32 in.) 14 mm (0.55 in.) 18 mm (0.71 in.) 28 mm (1.1 in.) 10 mm (0.39 in.)
Elongation at break
(cable)
17 % 17 % 17 % 17 % 2 %
Service ductile
yield (cable) at
load of between
10-60 %
Not specified 3-9 % 2-9 % 3-10 % 0.25-0.85 %
Service life 8 years 12 years 12 years 8 years 8 years
Tensile strength of
system when in-
stalled with shock
absorber
500 daN (0.5 t) 3,030 daN (3.0 t) 4,800 daN (4.8 t) 10,000 daN (10 t) 7,000 daN (7.0 t)
Ageing 2-3 % per year 2-3 % per year 2-3 % per year 2-3 % per year Not specified
Areas of
application
Guying young
trees, fruit
growing
dynamic break-
age cabling up
to 40 cm (16 in.)
branch diameter,
load/support
cabling up to 30
cm (12 in.) branch
diameter
dynamic
breakage cabling
for 40-60 cm
(16–24 in.) branch
diameter, static
breakage cabling
up to 40 cm
(16 in.) branch
diameter, load/
support cabling
for 30-40 cm
(12-16 in.) branch
diameter
dynamic
breakage cabling
for 60-80 cm
(24-32 in.) branch
diameter, static
breakage cabling
for 40-60 cm
(16-24 in.) branch
diameter, load/
support cabling
for 40-60 cm
(16-24 in.) branch
diameter
static breakage
cabling up to 40
cm (16 in.) branch
diameter, load/
support cabling
for 30-40 cm
(12-16 in.) branch
diameter
Standards met Manufacturer’s
specifications
ZTV, ANSI A300,
ÖNORM
ZTV, ANSI A300,
ÖNORM
ZTV, ANSI A300,
ÖNORM
ZTV, ANSI A300,
ÖNORM
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