Survey of the Pagoda Timber Roof in Derneburg Castle

Abstract

ABSTRACT:The work analyses the historical roof of Derneburg Castle, in the municipality of Holle, Hildesheim's district, Lower Saxony, Germany. The roof is assembled according to Laves Balken's system (Laves beam's system), developed by the architect Georg Ludwig Friedrich Laves (1788 -1864). The system has the peculiarity to consist of beams that are split along the half of the cross section, and maintained diverged by wooden wedges, distributed along the length of the beam. The system increases the height of the beam, and elevates the bending capacity of it (Weber, 1964). The work has been developed in the frame of an interdisciplinary project in the fields of architecture, engineering and photogrammetry. Main aim of the project is the developing of a structural model to understand the load-carrying capacity of Laves Balken's system from the laser-scanning model. For this reason, extensive surveys and photo documentation were collected on three areas of the roof construction, characterized by three peculiar usage of Laves Balken's system. The work presents the survey of the pagoda-roof that covers the tower of the castle, and problems that can be encountered during the survey of very complex timber constructions.

Photogrammetric Measurement of a Wooden Truss

“…There are many works promoting the usability of terrestrial laser scanning (TLS) in the measurement of timber structures. Interesting applications have been presented, e.g., by (Bertolini et al, 2015), (Lee et al, 2015) or (Perria et al, 2017).…”

Flexión activa en madera. Generalización de su uso mediante la aplicación a una estructura horizontal portante

“…Fija los extremos con correas de hierro para evitar que la apertura se extienda y empieza a introducir cuñas y bloques de madera que fuerzan y separan la parte superior de la inferior hasta duplicar el canto (figura 2.33). Al final de su exposición enumera un conjunto de obras que ha construido con este sistema: algunos puentes peatonales con madera de roble, alguno para carruajes con abeto y también alguna cubierta como la del castillo de Derneburg [Perria et al 2017].…”