EinleitungNach Reinforced concrete roof frames as a typical construction form of the post-war period In the central and eastern part of Germany, reinforced concrete roof structures form a distinctive type of building construction. The lack of timber was the main reason for the design and establishment of such structures at that time. Especially in the 1950s and 1960s, precast concrete companies developed system solutions for roofs of various spans. Around 1950, such constructions were called "Sprossendach" and implemented in only slightly engineered manner. In subsequent years, such roof structures became more systematic and were converted to an almost complete prefabrication and simultaneously qualitatively improved. This paper presents an analysis of selected reinforced concrete roof constructions in Central and East Germany. In the result, the 50-year-old structures have comparatively little damage. However, despite their quite favourable long-term behaviour, this construction type has not enforced due to the quite high expenses for planning and installation.

Durch die projizierte globale Erwärmung werden sich Hitzeextreme verschärfen. Vor allem in den Städten wird die Lebensqualität der Stadtbevölkerung unter sommerlichen Hitzewellen leiden. Im Projekt HeatResilientCity werden bewohnerorientierte Hitzeanpassungsmaßnahmen an Gebäuden und im städtischen Freiraum entwickelt und geprüft sowie Empfehlungen für die Umsetzung gegeben.The HeatResilientCity project applied insights from natural sciences, engineering and the social sciences to develop heat adaptation measures, test their effectiveness and partially implement them in two structurally different real-world laboratories in Dresden-Gorbitz and Erfurt-Oststadt. The present article discusses interventions to plant street trees and to refurbish two different residential buildings. We describe and analyse aspects of the implementation process to identify key factors that enable or constrain adaptation action among different groups of actors. We find that adaptation measures that are objectively effective and supported by residents are most appropriate for implementation. Where residents evince scepticism about adaptation measures, information about their effectiveness and usefulness should be disseminated. Early and targeted involvement of relevant stakeholders, careful communication and the establishment of climate adaptation as a permanent interdepartmental task at municipal level can promote successful implementation of heat adaptation measures.

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