SURVEY OF WOOD STRENGTH PROPERTIES OF URBAN TREES IN SINGAPORE USING THE FRACTOMETER II

The Fractometer II, a portable field-based wood testing device, was used to assess the radial bending strength, fracture angle and longitudinal compression strength of freshly cored wood samples from the lower trunk of 25 urban tree species in Singapore. Tables of standard values for the future use...

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Bibliographic Details
Published in:Journal of tropical forest science 2010-01, Vol.22 (1), p.97-105
Main Authors: Ganesan, SK, Hamid, M Abdul
Format: Article
Language:English
Subjects:
Arboriculture
Compressive strength
Flexural strength
Frequency distribution
Risk analysis
Stand tables
Street trees
Trees
Tropical forests
Wood strength
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Summary:The Fractometer II, a portable field-based wood testing device, was used to assess the radial bending strength, fracture angle and longitudinal compression strength of freshly cored wood samples from the lower trunk of 25 urban tree species in Singapore. Tables of standard values for the future use of this device for the species tested are presented. For radial bending strength and fracture angle, the data showed interspecific variation. Paraserianthes falcataria (Leguminosae), a species noted for snapping, had radial bending strength that was significantly lower than all the species tested. Swietenia macrophylla (Meliaceae) had high fracture angle and radial bending strength. The use of the Fractometer II and the results of this survey in tree risk assessment are discussed. Fraktometer II merupakan alat mudah alih yang diguna untuk menguji kayu di lapangan. Kami menggunakan alat ini untuk mengukur kekuatan lentur jejari, sudut patah dan kekuatan pemampatan ira selari bagi sampel empulur kayu yang baru sahaja diambil daripada bahagian bawah batang 25 spesies pokok hutan bandar di Singapura. Jadual nilai standard bagi kegunaan alat ini pada masa hadapan disertakan dalam kertas kerja ini. Bagi nilai kekuatan lentur jejari serta sudut patah, data menunjukkan variasi antara spesies. Paraserianthes falcataria (Leguminosae), spesies yang mudah menyentap, mempunyai kekuatan lentur jejari yang lebih rendah secara signifikan berbanding dengan semua spesies lain. Swietenia macrophylla (Meliaceae) mempunyai nilai sudut patah serta kekuatan lentur jejari yang besar. Kegunaan Fraktometer II dan keputusan yang diperoleh daripada tinjauan ini dalam penilaian risiko pokok dibincangkan.
ISSN:0128-1283
2521-9847