Reviving courtyard
R.J. Kooistra (TU Delft - Architecture and the Built Environment)
L. Thijssen – Mentor (TU Delft - Architecture and the Built Environment)
Max Salzberger – Mentor (TU Delft - Architecture and the Built Environment)
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Abstract
This graduation project investigates how timber topping-up and bridge interventions can revitalise the Stadstimmertuin in Amsterdam, using the city’s historical timber construction tradition as an active design driver. From 1662 until 1899, the Stadstimmertuin served as Amsterdam’s principal timber storage and processing yard. Over time, the open courtyard was gradually filled with buildings of varied origin, leaving the site fragmented, largely inactive outside office hours, and disconnected from the public realm. Despite this condition, the block retains the latent potential of a rare, large-scale enclosed courtyard in Amsterdam’s historic inner city.
The research is structured around the Double Diamond framework: Discover, Define, Develop, and Deliver. Through which design and research continuously inform one another. The inquiry addresses five interrelated sub-questions spanning site analysis, the structural and spatial logic of Amsterdam’s historical timber building tradition, the typology of historical Dutch timber bridges, a revitalisation strategy for the courtyard block and the translation of historical precedent into a contemporary timber building.
Site analysis reveals the Stadstimmertuin as a palimpsest: a layered urban condition in which different periods of transformation coexist without forming a resolved whole. Rather than treating this fragmentation as a deficit, the research proposes it as a generative starting point. The analysis of Amsterdam’s timber tradition reveals it as a deeply integrated system in which corbels, bracing elements, and portal frames are not merely structural components, but part of a combined structural and architectural logic, where elements may appear ornamental while simultaneously performing a structural role. This systems-based reading extends into historical Dutch timber bridge typologies, where structural necessity and spatial richness are consistently intertwined. A relationship directly applicable to elevated connections within a dense urban courtyard.
The architectural proposal operates at three levels. Programmatically, the Timber Institute of Amsterdam is introduced as the central anchor: an institution dedicated to timber knowledge and craftsmanship that re-establishes the site’s historical identity and sustains activity across the day. Spatially, the topping-up of existing buildings and the introduction of elevated timber bridge connections transform the courtyard from a two-dimensional enclosure into a three-dimensional network of spaces, creating new circulation routes and spatial relationships between previously disconnected buildings. Tectonically, the design reinterprets the historical tradition through glulam structural systems, hardwood connection details derived from Dutch joinery\ and selective steel reinforcement at high-stress nodes maintaining structural clarity and material honesty without formal reproduction.
The enclosed site presents several constraints, including limited crane access, restricted vehicular entry, and close proximity to Amsterdam’s waterways. These conditions can be understood as continuities of the historical circumstances that originally shaped the timber-building tradition itself. Water-based transport and prefabricated construction are integrated into the assembly strategy accordingly.
The research concludes that Amsterdam’s historical timber tradition gains value when approached as a critical and constructive system rather than as a superficial reference. Providing not only a material and formal vocabulary, but also a disciplined way of thinking about the relationship between structure, space, and place. The result is a hybrid timber architecture that is neither a nostalgic reconstruction nor an abstraction, but a grounded reinterpretation of a specific and locally rooted building culture.