insulated distribution polesjerol® helps create safe workplaces

jerol® distribution poles provide

ver. 2013-01-22

safe climbing

Challenge

Climbing in a Jerol pole must be as easy as climbing in a wooden pole.

Climbing must be safe in all weather conditions.

Problem identification

Standard safety line, without extra gripping equipment, can become slippery with the Jerol pole.

Blunt spikes and severe frost might result in poor grip for the climbing shoes.

Must have

Good grip on the Jerol pole

Firm bite onto the pole

Using standard approved climbers and safety equipment

The Solution

A strap with a Jerol Gripper to improve grip against the pole

The Jerol Gripper

Developed in co-operation with C2 Vertical Safety

Tested with a dummy in C2 Vertical Safety’s training and testing facilities

Tested at Björklinge Energi in field conditions

C2 Vertical Safety

Torbjörn Larsson, Safety Engineer,

Vattenfall Service Syd:

"C2 Vertical Safety is our main partner in

training, safety equipments and material

inspections. Together we have developed

the ”EBR-method” to resque climbers in

distress."

C2 Vertical Safety

Patrik Polgar, Training and Technical

Solutions Manager, C2 Vertical Safety:

“Since we don’t interfer with existing safety

equipment, but merely use the Jerol Gripper

to protect the safety strap, we will probably

not require additional approval for the

equipment”.

Test procedure at C2

A 70kg test dummy was set to hang from a rope mounted on the top of the Jerol pole.

A strap with a Jerol Gripper was then placed round the pole and hooked to the dummy’s standard safety line.

The supporting rope was then cut to produce a free fall of the dummy. The safety line had to carry the entire weight of the dummy.

Dummy set up

Test procedure and result

Prior to the test the position of the Jerol Gripper is marked.

After the test the distance between the Gripper and the mark is measured.

Result: The Jerol Gripper on the strap grabs within 1 cm.

Patrik Polgar: “The result is suprisingly good! The Jerol Gripper makes climbing in the composite pole safe regardless of weather conditions.”

Test with dummy

Field test

A field test to verify lab result was conducted by linemen

from utility company Björklinge Energi:

Weather conditions: Temperature -16⁰C with snowfall

The linemen found that the Jerol Gripper worked well

even in tough winter conditions

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