).This mode enables to determine the ice load on cables and ropes, and implements the requirements specified in Section 7 of SNiP, KMK, Section 10 of DBN and Section 12 of SP 20.13330 as regards the calculation of the linear ice load. The characteristic value of the ice load is calculated per unit length of a cable or rope.
The design (according to SNiP, KMK and SP) and design ultimate (according to DBN) value of the ice load is the product of the characteristic value and the safety factor for load.
For the analyses according to SNiP, KMK and SP, the default value of the safety factor for load is taken as 1.3 in compliance with Sec. 7.3 of SNiP, KMK and Sec. 11.3.4 of SP 20.13330.2011, 1,8 by SP 20.13330.2016.
For the analyses according to DBN, the safety factor for the ultimate ice load value is determined in accordance with the instructions of Sec. 10.10.
The user can change the value of the safety factor in the edit mode
(button ).
When calculating according to SP 20.13330.2016, the Extremal Action marker allows you to obtain results in accordance with the requirements of SP 296.1325800. In this case, it is necessary to introduce safety factor for extreme loads. Since this involves special effects, results for the SLS are not available.
In addition to the ice load, the ice-wind load is calculated as well.
For the analyses according to SNiP, KMK, the ice-wind load is calculated in compliance with the requirements of Sec. 7.4 of SNiP, KMK.
For the analyses according to SNiP, KMK, the initial data on the wind region according to Map 3, and on the ice region according to Map 4 of the mandatory Annex 5 of SNiP, KMK can be specified either directly in the Initial Data tab or transferred from the Location mode by means common for WeST.
For the analyses according to SP, the initial data on the wind region according to Map 3 of SP 20.13330.2011, Map 2 of SP 20.13330.2016 and on the ice region according to Map 4 of SP 20.13330.2011 and Map 3 of SP 20.13330.2016 of the recommended Annex G of SP 20.1333.2011 and Annex F of SP 20.13330.2016 can be specified in the same way as in the case of analyses according to SNiP, KMK.
For the analyses according to DBN, the wind load is calculated in compliance
with the requirements of Sec. 10.9. The initial data on the ice-wind region
taken according to the map (see Fig. 10.2 of DBN), and the initial
data on the ice region taken according to the map (see Fig. 10.4 of
DBN) can be specified either directly in the Initial
Data tab or transferred from the Location
mode by means common for WeST.
If DBN is selected, the button 
provides
access to the list of Ukrainian cities, which (based on Annex F of DBN)
contains the refined data on the characteristic load value. If you select
the desired city and click the OK button, the characteristic load value
will be automatically transferred to the initial data. Moreover, these
loads can be further refined within the limits of the regional loads in
accordance with Annex F of DBN.
On the Initial Data tab the user can specify the values of the ice thickness and the wind load different from those set for the current zone by the design standards.
The characteristic and design values of the ice load, and the wind load on the ice-covered cables (ropes) are determined in the result of the analysis according to SNiP, KMK and according to SP.
When using SP 20.13330.2011 a special checkbox Building or structure under construction enables to take into account the requirements of Sec. 4.5 of SP. The reduction of the design load for buildings and structures under construction is not obligatory in SP 20.13330.2016, therefore this checkbox is not provided. The reduction of load (allowed by SP 20.13330.2016) can be taken into account by reducing the safety factor for load by 20%.
The design ultimate values of the ice load and the wind load on the ice-covered cables (ropes) are determined in the result of the analysis according to DBN.
The ice-wind load is determined under the assumption that a cable (rope) is located in the plane perpendicular to the wind flow. When determining the wind load, the application allows for an increase of the cable (rope) diameter due to the ice cover.
The results of the analysis are given in the graphical form on the respective tab. The numeric results can be obtained by scanning the plots.
The ice load is calculated for cables (ropes) running at the height not more than one hundred meters above the ground.