Characterization of tabique walls nails of the Alto Douro Wine Region

Abstract

Tabique is one of the main Portuguese traditional building techniques which use raw materials as stone, earth and wood. In general, a tabique building component as a wall consist of a wooden structure made up of vertical boards connected to laths by metal nails and covered on both sides by an earth based material. This traditional building technology as an expressive incidence in the Alto Douro Wine Region located in the interior of Northern Portugal, added to the UNESCO's Word Heritage Sites List in December 2001 as an 'evolved continuing cultural landscape'. Furthermore, previous research works have shown that the existing tabique construction, in this region, reveals a certain lack of maintenance partially justified by the knowledge loosed on that technique, consequently this construction technique present an advanced stage of deterioration. This aspect associated to the fact that there is still a lack of scientific studies in this field motivated the writing of this paper, the main objectives are to identify and characterize the nails used in the timber connections. The nails samples were collected from tabique walls included in tabique buildings located in Lamego Municipality, near Douro River, in the Alto Douro Wine Region. This work also intends to give guidelines to the rehabilitation and preservation of this important legacy.

Haussmann Structural Floors Repairs and Strengthening Techniques

“…These results indicate that the metallic profiles still present good mechanical characteristics, in fact, the actual minimum tensile yield strength for metallic profiles is 360 MPa and the Young modulus is 200 GPa, (EN 1993-1-1, 2005). The protection given by the existing plaster infill around the metallic profiles certainly justifies those values (Cardoso et al, 2016).…”

“…This scenario related to traditional building heritage state of conservation is not unique and can be found in several European countries, (Branco J. et al, 2006), (Catarig Al. and Kopenetz L., 2007), (Cardoso R. et al, , 2016(Cardoso R. et al, , 2017. This article characterizes the strengthening techniques applied to the floors of a Haussmann building complex located at La Madeleine, based on information gathered during the rehabilitation works that were performed between 2015 and 2017.…”

Earth-based construction material field tests characterization in the Alto Douro Wine Region

“…A tabique building component as a wall, (Figure 1), is formed of a timber structure made up of vertical boards connected by laths (horizontal slats) which are connected with metal nails, [6]. This structure is then lled and coated with a CEBM, [1,3,5,8].…”

“…Studies regarding this technology, although initiated in 2008 [5], have at this stage analysed some aspects of tabique buildings located in the Trás-o-Montes e Alto Douro Region, as materials characterization [1,3,[5][6][7], building state of conservation [1,5], tabique walls typologies [8], numerical modelling [9], thermal insulation [10,11], re resistance and rehabilitation works. The present work follows the study presented in [1,3,5,12] and relative to laboratory tests applied to characterize the earth-based material (EBM) present in tabique walls.…”