Workshop Cluster D – „Lightweight Roof Support Structures of the High Modern Age“

Weimar – Bad Blankenburg – Erfurt
On August 26 and 27, 2021, the members of the subprojects Heritage conservation of space frame structures (D1) und Plank trusses (D2) which are connected in cluster D, met for a two-day workshop at the Bauhaus University Weimar. In addition, Prof. Dr. Hans-Rudolf Meier, a representative of the scientific advisory board of the SPP 2255, Konrad Frommelt M.Sc., the author of the associated research project Reallabor Cottbus (E1) and Dr.-Ing. Mark Escherich, the head of the department of the Lower Monument Protection Authority Erfurt, a proven expert for GDR architecture, took part in the workshop

In the first part of the workshop, common questions and topics of the two subprojects were elaborated in presentations and discussions, especially with regard to the current SPP annual topic of Building at the Limit. A defining characteristic of the two types of construction that are the focus of the investigations – for space frameworks as well as for nailboard trusses – is the desire for the highest possible efficiency, above all material savings. The underlying limitation on the part of the economy, be it the economy of scarcity in the GDR or the profit orientation of the FRG, can be addressed as an essential driving force of technical development. The establishment and development of rules and regulations proved to be further connecting elements in the evolution of the two types of construction. In this context, the dependence of the development of the construction types on the progress of the calculation methods on which they are based was recognized as particularly noteworthy and worthwhile for joint research – a topic that has so far received little attention in the field of the history of construction technology.

The second part of the workshop consisted of excursions to interesting roof structures of high modernism in Weimar and the surrounding area. Two large ultra-modern timber structures on medieval church buildings were visited with the roof structure of the Weimar City Church of St. Peter and Paul (Herderkirche), which was rebuilt in the immediate post-war period over a girder grid of reinforced concrete, and the roof structure of the Erfurt Cathedral, which was rebuilt 20 years later as a “western import” over the nave. In the case of the university sports hall “An der Falkenburg”, built in Weimar in 1972-74, the visitors were interested not only in the original space frame construction of the “Weimar” type but also in a reinforcement carried out in the 2010s. On site, Volker Mund from the engineering office Bauen and Wolfram Bauer from the engineering office Dr. Krämer explained the genesis and execution of their jointly developed renovation concept, which aims to ensure the structural safety of a new insulated roof structure, also taking into account current snow load approaches. Finally, the historic conference hall of the Evangelical Alliance in Bad Blankenburg was visited, a building from the early high modern era that still has a remarkable amount of original substance both in its furnishings and in its arched truss structure, which was erected in only 10 weeks in 1906.

Further Veranstaltung, Workshop Aktivitäten