Testing and Qualification

The Tower Solutions restoration tower complies with the requirements of both IEEE 1070-2006 and IEC60652 standards. Our tower is the only restoration tower system in the world to be accredited to both of these standards.

IEEE 1070-2006 standards (Guide for the Design and Testing of Transmission Modular Restoration Structure Components) requires that all the components of a restoration tower system be tested independently, in a testing laboratory, in accordance with the standards.

Find out what our IEEE and IEC certified ERS Towers can do


IEC 60652 (Loading tests on overhead Line Structures) requires that the complete tower system be tested as a whole, in real field conditions, in accordance with the loading limits required by the client.

All Tower Solutions towers are tested in accordance with IEEE before they are shipped to clients. During testing, the client is invited to witness every step of the testing process. When towers are shipped, a complete bill of materials is included as part of the shipping documents. All mill certificates are made available for inspection at any time.


IEC Testing

An Emergency Restoration tower is a temporary/permanent structure. Temporary because it is used as such in various scenarios and permanent because depending on the application it can remain in operation for several years. Therefore is strongly recommended that an ERS should be tested in accordance with IEEE standards and in addition tested as a fully erected system in a full tower testing site (similar to the tests conducted on a permanent tower) in accordance with IEC 60652 with a load no less than 80,000.00 N.

This crucial test applies loads on a fully erected tower and is the only standard that tests a fully erected ERS in the manner in which it will actually be used in practice. It is important that an ERS is physically tested not just according to IEEE but according to IEC standards as well.


IEEE defines specific criteria for the way that attachments must be bolted to the tower. Tower Solutions’ tower attachments are secured to the tower in a manner precisely consistent with these criteria.

IEEE also requires that tower sections be connected by means of a flange connection. Tower Solutions’ tower complies with this criterion.

IEEE Testing

Requirements of IEEE Testing of Transmission Modular Restoration Structure Components, Std. 1070-1995 includes the following tests.

  • Compression of Columns
  • Bending of Columns
  • Torsion of Columns
  • Ultimate Strength Bending – Bolts
  • Ultimate Strength Bending – Welds
  • Test of Insulator Attachment
  • Test of Guy Attachment
  • Test of Bolt and Nut Ultimate Strength
  • Combined Bending and Compression of Columns
  • Test of Column Buckling
  • Test for Compression of Gimbal
  • Test for Gimbal Transverse Load