The calculation of the allowable tensile stress in the fiber optic cable

This program allows to calculate the allowable tensile stress on the self-supporting optical cable of the type "8" and to choose the right type of cable FinMark ®.

Enter your information and click "Calculate"

The maximum distance between the supports:
X
The maximum distance between supports, will mainly determine the allowable tensile force, and therefore the cable type . The greater this distance is, the more durable cable is needed. Usually FinMark ® cables can be hung with the maximum span lengths up to 180-220 m
m
Sag:
X
Sag cable is typically 2-3%. The greater is the sag the less is the cable tensile load i. But it should not be too big to not slack cable close to the ground.
%
' /> m
The additional load coefficient:
X
The additional load coefficient takes into account the additional tension on the cable due to wind load and icing. We recommend using the coefficient of 5, which take into account the most stringent conditions for nearly all regions of Ukraine. When the coefficient is 1 it will show the the load calculation due to its own cable weight only.
The number of fiber:
X
The number of fiber for cable type UT – from 4 to 24, and for the LT ‘type –from 2 to 144. Do not use an odd number of fibers.
Type of cable:
X
Type of cable FinMark ® can be set as follows: UT (with a central tube) or LT (modular design), or without specific set.
  
   

 

Calculation parameters

The maximum distance between supports, will mainly determine the allowable tensile force, and therefore the cable type . The greater this distance is, the more durable cable is needed. Usually FinMark ® cables can be hung with the maximum span lengths up to 180-220 m

Sag cable is typically 2-3%. The greater is the sag the less is the cable tensile load i. But it should not be too big to not slack cable close to the ground.

The additional load coefficient takes into account the additional tension on the cable due to wind load and icing. We recommend using the coefficient of 5, which take into account the most stringent conditions for nearly all regions of Ukraine. When the coefficient is 1 it will show the the load calculation due to its own cable weight only.

The number of fiber for cable type UT – from 4 to 24, and for the LT ‘type –from 2 to 144. Do not use an odd number of fibers.

Type of cable FinMark ® can be set as follows: UT (with a central tube) or LT (modular design), or without specific set.

The result of the calculation will be presented in a list of optical cables FinMark ®, relevant to source data. The lines with cables whose parameters most closely correspond to the calculated tensile force (have a minimum margin of tensile force) are painted in yellow. If the calculation results shows no cable type at all , then try to find another input data (the span length, sag.) For larger spans (250 - 300 m), specially designed cables, such as LTxxx-SM-ADSS- type can be used. For details, refer to the DEPS company managers.



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Result

"); }*/ echo "
"; if (!is_numeric($_POST['distance'])) { echo "
Расстояние между опорами должно быть числом!
"; $err=1; } /*if (!is_numeric($_POST['real_provis'])) { echo "
Стрела провеса должна быть числом!
"; $err=1; }*/ if (!is_numeric($_POST['real_proviz'])) { echo "
Стрела провеса должна быть числом!
"; $err=1; } if (!is_numeric($_POST['cabel_num'])) { echo "
Кол-во волокон должно быть числом!
"; $err=1; } /*if (($_POST['real_provis'] < 0) || ($_POST['real_provis'] > 99)) { echo "
Стрела провеса должна быть в диапазоне 0 - 99
"; $err = 1; }*/ if (($_POST['real_proviz'] < 0.1) || ($_POST['real_provis'] > 10.0)) { echo "
Стрела провеса должна быть в диапазоне 0.1 - 10.0 %
"; $err = 1; } if (($_POST['distance'] < 10) || ($_POST['distance'] > 500)) { echo "
Расстояние между опорами должно быть в диапазоне 10 - 500 метров
"; $err = 1; } if ($_POST['cabel_num'] % 2 == 1) { echo "
Кол-во волокон должно быть парным числом!
"; $err = 1; } if ($_POST['cabel_type'] == 1) { if (($_POST['cabel_num'] < 2) || ($_POST['cabel_num'] > 24)) { echo "
Для кабеля UT кол-во волокон должно быть в диапазоне 2 - 24!
"; $err = 1; } } elseif ($_POST['cabel_type'] == 2) { if (($_POST['cabel_num'] < 4) || ($_POST['cabel_num'] > 144)) { echo "
Для кабеля LT кол-во волокон должно быть в диапазоне 4 - 144!
"; $err = 1; } } else { if (($_POST['cabel_num'] < 2) || ($_POST['cabel_num'] > 144)) { echo "
Кол-во волокон должно быть в диапазоне 2 - 144!
"; $err = 1; } } echo "
"; if (!$err){ $r_prov = get_float($_POST['real_proviz']); $prov = $r_prov; $s = $prov; $k = get_int($_POST['koef']); $l = get_int($_POST['distance']); $ss = $l*($s/100); $n = get_int($_POST['cabel_num']); $ct = get_int($_POST['cabel_type']); $cab = ($ct == 2?"LT":($ct == 1?"UT":"LT и UT")); ?>
Legend:
  optimal result
  result close to the maximum load

* DEPS сompany recalls that the reliability of the cable line and its long service life depends not only on the correct choice of cable, but also on compliance with the rules of installation and cable laying (proper mounting on supports, adherence to sag, placing of mounting cable reserve around the closure, etc.), as well as the choice of a suitable cable accessory.


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