Materials and Structures

, 51:99 | Cite as

First results on the combination of laser scanner and drilling resistance tests for the assessment of the geometrical condition of irregular cross-sections of timber beams

  • Manuel CabaleiroEmail author
  • Jorge M. Branco
  • Hélder S. Sousa
  • Borja Conde
Original Article


Old timber structures often present damaged elements with irregular cross-sections, hidden surfaces and even with loss of material due to decay. Within that scope, in this paper, a new methodology based on the combination of laser scanner and drilling resistance tests is proposed and developed with the aim of analyzing the apparent and resistant sections of timber beams with hidden surfaces and irregular cross-section affected by decay. The proposed methodology was initially calibrated with tests made on a timber beam within a laboratory environment and, then, its feasibility was tested on a case study regarding the timber roof of the Guimarães Castle keep. The results confirm the suitability of this methodology for assessment of the present geometrical properties of timber elements with an average error of 1.5 and 4.5%, respectively, in the calculation of the apparent section area and inertia.


Resistant section LIDAR Deterioration degree Wood Timber structures 



This work has been partially supported by the European Association of International Cooperation Galicia-North of Portugal, program IACOBUS IV through a stay at the University of Minho to M. Cabaleiro (IACOBUS IV-35563149). This work has been partially supported by the Spanish Ministry of Interior (Grant SPIP2017-02122), Spanish Ministry of Economy, Industry and Competitiveness (Grant: EUIN2017-87598), and Xunta de Galicia through grant ED431C2016‐038. This work was partly financed by FEDER funds through the Competitivity Factors Operational Programme—COMPETE and by national funds through FCT Foundation for Science and Technology within the scope of the project POCI-01-0145-FEDER-007633. This research was partially supported by ProTimber research project (PTDC/ECM-EST/1072/2014) financed by the FCT Foundation for Science and Technology.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© RILEM 2018

Authors and Affiliations

  1. 1.Department of Materials Engineering, Applied Mechanics and Construction, School of Industrial EngineeringUniversity of VigoVigoSpain
  2. 2.ISISE, Department of Civil EngineeringUniversity of MinhoGuimarãesPortugal

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