EVALUATION OF TWO DIFFERENT WOOD TYPES IN TERMS OF DURABILITY AND TREATABILITY

Öz

The selection of an appropriate wood type as a structural material mainly depends on the environmental conditions of a region, such as humidity and temperature. Besides, the availability of the material with a reasonable cost is another concern in the selection. In this study, replaceability of “bangkirai” type of wood with “iroko” type of wood is investigated in terms of durability and treatability. The need for this study is aroused from the lack of “bangkirai” wood to satisfy the necessary conditions aforementioned above in the construction of visitor’s platform of Göbeklitepe Roof Canopy Structure. Göbeklitepe, which is known as the world’s first temple, is located in 18 km distance to the city of Şanlıurfa, Turkey. A visitor’s platform is planned to be built on this area in order to present the findings, the archaeological remains and the architecture to the society. The plank flooring material used on various parts of the visitor’s platform of this roof canopy structure is specified as “bangkirai” type of wood in the technical specification of the project. This study aims to reveal if it is convenient and suitable to use “iroko” type of wood instead of “bangkirai” type of wood on the related parts of platform.

Anahtar Kelimeler

• Wood,Bangkirai,Iroko,Durability,Treatability

İKİ FARKLI AHŞAP TÜRÜNÜN DURABİLİTE VE EMPRENYE EDİLEBİLİRLİK AÇISINDAN DEĞERLENDİRİLMESİ

Öz

Yapısal malzeme olarak uygun bir ahşap türünün seçimi, öncelikle nem ve sıcaklık gibi bölgenin çevresel koşullarına bağlıdır. Bunun yanında, malzemenin ekonomik olarak bulunabilirliği de seçimi etkileyen bir diğer etmendir. Bu çalışmada, “iroko” türü bir ahşabın, “bangkirai” türü bir ahşap yerine kullanılıp kullanılamayacağı, durabilite ve emprenye edilebilirlik açısından irdelenmiştir. Bu çalışmaya, Göbeklitepe’de bulunan çatı kanopi yapısının ziyaretçi platformu kısmında kullanılan “bangkirai” ahşabının yukarıda bahsedilen şartları sağlama zorlukları bulunduğundan dolayı ihtiyaç duyulmuştur. Dünya’da en eski tapınağın keşfedildiği Göbeklitepe, Türkiye’nin Şanlıurfa şehrine 18 km mesafede bulunmaktadır. Bu bölgede, açığa çıkarılan bulguları, arkeolojik kalıntıları ve mimariyi topluma sunabilmek amacıyla bir ziyaretçi platformunun inşası planlanmıştır. Söz konusu çatı kanopi yapısında ziyaretçi platformunun çeşitli bölümlerinde kullanılan ahşap döşeme malzemesi, proje teknik şartnamesinde “bangkirai” türü ahşap olarak belirlenmiştir. Bu çalışma, platformun ilgili bölümlerinde “bangkirai” türünde ahşap malzeme yerine “iroko” türünde ahşabın kullanılmasının uygun olup olmadığının ortaya konmasını amaçlamaktadır.

Anahtar Kelimeler

• Ahşap,Bangkirai,İroko,Durabilite,Emprenye Edilebilirlik

Kaynakça

1. Ali A.C., Junior E.U., Raberg U., Terziev N. (2011). Comparative naturel durability of five wood species from Mozambique. International Biodeterioration & Biodegradation 65: 768-776.
2. Arge (2014). Göbeklitepe project drawings. Karacadağ Development Agency, designed by: kleyer.koblitz.letzel.freivogel gesellschaft von architekten mbh & EiSat GmbH.
3. BioWooEB. (2012). The main technological characteristics of 245 tropical wood species. Retrieved from TROPIX 7 cirad.: http://tropix.cirad.fr/en.
4. Climate-Data (2018). CLIMATE-DATA.ORG. Retrieved from https://en.climate-data.org/location/289/.
5. Verma, C.S., Sharma, N.K., Chariar V.M., Maheshwari S., Hada M.K. (2014). Comparative study of mechanical properties of bamboo laminae and their laminates with woods and wood based composites. Composites: Part B 60: 523-530.
6. EN 275 (1992). Wood preservatives. Determination of the protective effectiveness against marine borers. European Committee for Standardization (CEN). Brussels, Belgium.
7. EN 335 (2013). Durability of wood and wood-based products — Use classes: definitions, application to solid wood and wood-based products. European Committee for Standardization (CEN).
8. EN 350 (2016). Durability of wood and wood-based products – Testing and classification of the durability to biological agents of wood and wood-based materials. European Committee for Standardization (CEN).

9. EN 460 (1994). Durability of wood and wood-based products - Natural durability of solid wood - Guide to the durability requirements for wood to be used in hazard classes. European Committee for Standardization (CEN).
10. EN 1995-1-1 (2004). Design of timber structures - Part 1-1: General - Common rules and rules for buildings. European Committee for Standardization (CEN).
11. Geiger, R. (1954). Klassifikation der Klimate nach W. Köppen" (Classification of climates after W. Köppen). Landolt-Börnstein – Zahlenwerte und Funktionen aus Physik, Chemie, Astronomie, Geophysik und Technik, 3: 603-607.
12. Google-Maps (2018). Google Maps. Retrieved from Google LLC: https://goo.gl/maps/ZpR4HfSeFMC2.
13. Köppen, W. (1936). Das geographische System der Klimate (The geographic system of climates). In W. Köppen, & R. Geiger, Handbuch der Klimatologie. Berlin: Borntraeger.
14. Müller-Hagedorn M., Bockhorn H., Krebs L., Müller U. (2003). A comparative kinetic study on the pyrolysis of three different wood species. Journal of analytical and applied pyrolysis 68-69: 231-249.
15. Dourado N., Morel S., de Moura M.F.S.F., Valentin G., Morais J. (2008). Comparison of fracture properties of two wood species through cohesive crack simulations. Composites: Part A 39: 415-427.
16. Peters J., Schmidt K., Dietrich O., Pöllath N. (2014). Göbekli Tepe: Agriculture and Domestication. Researchgate.
17. Palanti S., Feci E., Anichini M. (2015). Comparison between four tropical wood species for their resistance to marine borers (Teredo spp and Limnoria spp) in the Strait of Messina. International Biodeterioration & Biodegradation 104: 472-476.
18. Technical-Specification (2017). Construction Works for Revitalization of History in Şanlıurfa, Vol3, Technical Specifications, Section 1, Roof Canopy for Göbeklitepe Archeological Site.
19. WHC (2018). World Heritage Centre, World Heritage List. Retrieved from United Nations Educational, Scientific and Cultural Organization (UNESCO): https://whc.unesco.org/en/list/1572.