Identification of woods in old buildings and their repair

Megumi Kobori; Masayoshi Ota; Kouji Yanagisawa; Kenji Sugimoto

doi:10.1117/12.375191

14 January 2000 Identification of woods in old buildings and their repair

Megumi Kobori, Masayoshi Ota, Kouji Yanagisawa, Kenji Sugimoto

Proceedings Volume 3887, High-Power Lasers in Civil Engineering and Architecture; (2000) https://doi.org/10.1117/12.375191
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

In buildings that are old it becomes difficult to identify the types of woods used when planning their repair. This is because of blackening of the tree resin and discoloration due to the adhesion of the dust. Unless the wood can be identified correctly, parts cannot be replaced because differences in the expansion coefficient and water absorption can lead to dimensional instability. Furthermore, in the case of historically important buildings, it is not possible to cut out large-sized samples for laboratory identification. This paper explains a method developed to identify woods from 3 X 3 X 0.5 mm samples by measuring the distribution of the vessels of woods by a He- Ne laser. A database of identification parameters of more than 30 kinds of woods was made allowing identification and properties of most woods including imported woods used in architecture. The method developed is more accurate than the conventional identification methods used up to now. It was applied to identify the woods used in 100 to 400 year old buildings and to formulate their repair specifications. The method has also been applied to assess the suitability of imported woods for use in modern high buildings.

Citation Download Citation

Megumi Kobori, Masayoshi Ota, Kouji Yanagisawa, and Kenji Sugimoto "Identification of woods in old buildings and their repair", Proc. SPIE 3887, High-Power Lasers in Civil Engineering and Architecture, (14 January 2000); https://doi.org/10.1117/12.375191

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available