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ECtools - Earthquake Concrete Tools
Product Features


ECtools© (Earthquake Concrete tools) is a design software for Reinforced Concrete and Unreinforced Masonry Structures using either the European Norms (Eurocodes) or the ACI318-11& ASCE/SEI7-10 US norms. It aims to facilitate the practicing structural engineer or the design office in the correct application of the several clauses of these codes. It utilises the analysis results of either Scia Engineer© or - for the Eurocodes- ETABS©, and can be used in the following cases:

  • Seismic design of Reinforced Concrete Buildings
  • Checking/Reviewing the Design of Reinforced Concrete Buildings
  • Seismic Assessment and Retrofitting of existing Reinforced Concrete Buildings
  • Seismic design of Composite buildings with Concrete Cores (The cores)
  • Seismic design of Unreinforced Masonry Buildings
  • Seismic Assessment and Retrofitting of existing Unreinforced Masonry Buildings

The complete set of video tutorials for Scia Engineer and ETABS may be found at our youtube channel or here

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click here to download the ECtools Technical brochure in pdf



ECtools has been developed by 3PI. Ltd. which is a subsidiary of Penelis Consulting Engineers SA , a structural design office with projects in many EU and Non-EU countries with high seismic risk, such as Greece, Romania, Bulgaria, Croatia, Serbia, Cyprus, Egypt.

This means that ECtools is a product developed by structural engineers, aiming to satisfy the needs of structural engineers when dealing with large projects. It has been extensively tested within the design office and many Universities and its predecessor, eTools, has been in use since 2002 in Greece and Cyprus.



The Eurocodes program has allowed for some diversification within member states, thus introducing the National Annexes for each Eurocode. ECtools has incorporated those NAs for all EU countries.

Non EU countries, or EU countries without available NAs, can apply either the general suggestions of the Eurocodes, or a NA of their choice.

Additionally the clauses of ACI318-11 and ASCE/SEI 7-10 are applicable, through the IBC, to all US states as well as many international projects world wide.


The software menu and manual are in English, however the final calculation report, which is part of the design deliverables, can be produced in any language the user wishes, since it is very common for local authorities not to accept calculation reports in foreign languages.

Product description

Concrete Buildings in Seismic regions
Thursday, 17 April 2014 00:00


The new text Book Concrete Buildings in Seismic Regions has been published by Taylor and Francis (CRC) world wide. The book is auhrored bt Em. Professor George Penelis and Dr. Gregory Penelis.


Bearing in mind that reinforced concrete is a key component in a majority of built environment structures, Concrete Buildings in Seismic Regions combines the scientific knowledge of earthquake engineering with a focus on the design of reinforced concrete buildings in seismic regions. This book addresses practical design issues, providing an integrated, comprehensible, and clear presentation that is suitable for design practice.

It combines current approaches to seismic analysis and design, with a particular focus on reinforced concrete structures, and includes:

  • an overview of structural dynamics
  • analysis and design of new R/C buildings in seismic regions
  • post-earthquake damage evaluation, pre earthquake assessment of buildings and retrofitting procedures
  • seismic risk management of R/C buildings within urban nuclei
  • extended numerical example applications

Concrete Buildings in Seismic Regions determines guidelines for the proper structural system for many types of buildings, explores recent developments, and covers the last two decades of analysis, design, and earthquake engineering. Divided into three parts, the book specifically addresses seismic demand issues and the basic issues of structural dynamics, considers the "capacity" of structural systems to withstand seismic effects in terms of strength and deformation, and highlights existing R/C buildings under seismic action. All of the book material has been adjusted to fit a modern seismic code and offers in-depth knowledge of the background upon which the code rules are based. It complies with the last edition of European Codes of Practice for R/C buildings in seismic regions, and includes references to the American Standards in effect for seismic design.


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ECtools & Scia Engineer 2011 European launch
Monday, 11 July 2011 00:00

Nemetschek Scia, 3π presented ECtools and Scia Engineer 2011 in Eurodyn2011, in Leuven Belgium

Nemetschek SCIA and 3π presented the launching of ECtools and Scia Engineer 2011 during the EURODYN2011, Eighth International Conference on Structural Dynamics which took place in Leuven,
Belgium, from 4 to 6 July 2011. The international academia and practicing engineers who participated took an interest in the Seismic Design capabilities of the new co-operation between Nemetschek Scia and 3π-Penelis Software ltd.


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IMG00142-20110704-0946 IMG00141-20110704-0945
Simple Designer Available for FREE download and use
Saturday, 21 February 2009 18:21

This freeware standalone application has been developed by 3π and Penelis Consulting SA. It facilitates the biaxial flexural section analysis and design of simple rectangular and T sections incorporating the basic algorithm of eTools. It is free for use and distribution to any licenced civila engineer or students of engineering.

The program requires the triad of design loads (Biaxial moments and axial forces, and the design value of concrete compressive strength and steel yield strength. Please pay attention that all the values are in KN-m units and that they are design and not characteristic values. The result is the reqwuired reinforcement in cm.

Link to Download (Simple Designer.exe)



Copyright © 2010 - 2013 3π - Penelis Software ltd. Funded by European Commision - Hellenic General Secratariat of Research & Technology.