Latticed Steel Structures

Posted on by Engr. Hamid Ali

This post is about Latticed Steel Structures and Towers that are mostly used in KSA. In KSA for Transmission lines we follow SEC Standards. Saudi electricity Company provides the outline/fabrication drawings of different types of latticed steel towers. There are many types of towers used for 380kV transmission lines in KSA like F-Series, MF Series and SN Series etc. The mostly Used towers for 380kV Transmission lines in KSA are F Series and MF Series towers.

You can visit our post on Transmission lines design important points by clicking here. where we provide you most important OHTL design points.

380kV Double Circuit Vertical Configuration Tower (MF-Mountainous Area)

MF Series towers are used in Mountainous Areas of Saudia Arabia. Its design is for double circuit vertical configuration. Following are design parameters for MF-Series Towers

380kV Latticed Steel Structures MF-Series Towers

The design rulling span of MF Series towers is 450 meters. Other design parameters are shown in above image.

380kV Double Circuit Vertical Configuration Tower (F-Flat Area)

F Series towers are used in Flat and smooth areas where no Mountainous exist. Its design is also for double circuit vertical configuration. Following are design parameters for F-Series Towers

380kV Latticed Steel Structures F-Series Towers

The design rulling span of MF Series towers is 450 meters. Other design parameters are shown in above image.

Important points related to 380kv Latticed Steel Structures

If you are a design engineer, Estimating engineer or want to enter these fields in KSA remember the following important points

  1. You will receive outline drawings, design drawings and fabricatioin drawings from SEC in Tender Documents.
  2. You will also receive black weights of each components of these towers (Basic Body, Body extension, leg extension, platforms etc.)
  3. Important things you need to do while calculating tower weights
    • Check the operating area Eastern, western or southern
    • Apply Zinc Coating & hot-dip galvanization as per SEC requirements
    • For operating areas and Zinc Coating & hot-dip galvanization details Visit Design Points page
    • Visit our youtube channel to check weight template and calculation procedure Here
    • You need to determine the body extensions and leg extensions and overall hieght of the latticed steel structures using PLS CADD
    • For Latticed steel towers other than SEC provided the requirements shall be as per TES-P-122.05, Part I and 20-TMSS-01.
    • The existing family of towers provided by SEC are designed only up to 1,000m altitude above mean sea level and without uplift.

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