All sustainable structural maintenance and therefrom excepted Life Cycle Performance has to be based on reasonable data management, done by the owner or the user. Knowing this, a few decades ago (in 1998) the German Federal Highway Research Institute led the development of a computer based building data management system for bridges. By limiting project on the bridges, which are up to 99% public property, the demands of the such system were reduced to reasonable size. At the time, the approach would not have been suit-able for other civil engineering structures for the reasons as: high variability of structural concepts, large amount of different structural components, concepts even within one single structure, multiple contractors at one building, high owner change rate, bad database, and so on. The structural failures during the winter 2005/06 demonstrated the urgent need for clear concept of Data Management and Controlled Structural Maintenance for other civil engineering structures, besides bridges, once again. Responsible owners recognise that and react accordingly, with the fundamental demand of controlled maintenance for structures. It can be facilitated with appropriate model similar as for the bridges. As example, a-step-towards-a solution is presented on the Tropical Islands Dome south-east of Berlin, the largest free span Dome in Europe. Basic considerations herein are: practical use for the owner from today onwards, easy updating, long durability, low permanent costs, and some others. This can be done following High-Brain/Low-Tech concept knowing that such basic electronic formats are often used to deal with a very complex structures. The expected result is an easy-to-use database for the structure and controlled maintenance of structures over their service time in next decades. It is an example for treating the problem with the aim of keeping maintenance costs predictable and aims to fulfil the precondition of every structural design code in order to keep the calculated safety level – adequate maintenance over the structure service time.