The ultimate manhole covers site
ZAG - Slovenian National Building and Civil Engineering Institute - located in Ljubljana.

From Zag web site:
ZAG is the leading Slovenian Institute in the field of building and civil engineering.Through high-quality work it successfully promotes the progress-orientated Slovenian applied science and technical expertise on a global scale.

As a certification body, ZAG’s Certification Service (CS ZAG) places great emphasis on the continuous improvement of the quality of its services. For this purpose it has established its own quality management system which meets the requirements of the standards SIST EN 45011 and SIST EN ISO/IEC 17065, whose fulfilment is confirmed by internationally acknowledged accreditation.

The web site of the institute that issue the Standards stamp

An example of a cover that carries the standard on the "ultimate manhole covers" site. From this lid the picture that appears in the general section was taken.
There are 13 manhole covers in the site that has this standard mark
Click for all the covers with this standard

Click for the rest of the standards in the site

The ultimate manhole covers site

Initiating the site - Eli Zvuluny - Programming and building the site Possible Worlds Ltd. Possible Worlds Ltd. © 2017-2024

© ALL RIGHTS RESERVED - The site and its content are copyright protected. The full copyrights of the site's content belong to Eli Zvuluny. All images in the site (unless another photographer is mentioned) were taken by Eli Zvuluny that has the full copyrights on them. The use of any images or other materials included herein, in whole or part, for any purpose is expressly prohibited without the written permission of Eli Zvuluny. .