manual
Page
29
of
37
version 01
10.1
Real acting power during rope pull training
The basis for cable column training is the pulley principle. The force required to lift a weight can be
reduced by using loose pulleys and the number of supporting ropes.
The more load-bearing ropes used through the use of loose sheaves, the lower the load arriving at the
rope ends. This can be calculated using the following formula:
𝐹
𝑧
= 𝐹
𝐿
∗ 𝑛
−1
∗ 𝑚
The S1 cable column (10120100) uses three loose pulleys and six load-bearing ropes. As a result, the
load at the end of the rope is one sixth of the weight put in.
The cable column S3 (10120300) does not use a loose pulley and only one load-bearing wire rope. As a
result, the load at the end of the rope is just as large as the weight inserted.
Added to this are very low additional loads - the basic weight. Consisting of the weights of the deck
weight, the pin and the pulling sword:
S1 med. explosive Cable pull (Art. 10120100): 3,999 kg
S3 med. vertical pull (Art. 10112800):
2,794 kg
As a result of the pulley block principle, the following loads act at each rope end, which can be added
as constants to the following tables:
S1 med. explosive cable column (Art. 10120100):
0.667 kg
S3 med. vertical pull (Art. 10112800):
2,794 kg
Please note: The additional load exerted by the base weight has an even greater relative influence the
lower the weight is.
Example:
Product
Weight put
in
Weight per rope end
without deck weights
and tie rods
Weight per rope end
incl. deck weights and
tie rods
Influence of deck
weights and tie rod
S1
20 kg
3,333 kg
4 kg
19,9%
S1
30 kg
5 kg
5,667 kg
13,3%
This influence of the base weight cannot be seen on the weight plates, but should be taken
into account, when dosing the load for the patient.
F
z
= needed pulling force
F
L
= force through load
n = number of primary ropes
m = number of used ropes (training: 1 or 2)
