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Research Journal of the University of Ruhuna, Sri Lanka- Rohana 11, 2019
Specimen used in the Compression Perpendicular to Grain Test
The length, width and depth of the specimens of both clear and finger jointed timber
used in the compression perpendicular to grain test were each 50 mm according to
test method describes in BS 373:1957. (Refer Figure 5 and dimensions are not in
scale).
Specimens of Structural Scale
For the Test Series 2, 1000 mm × 100 mm ×100 mm finger jointed and glue jointed
specimens of structural scale, made of Grandis and Pine were prepared as shown in
Figure 6. Clear timber specimens of the same dimensions made of same species of
timber were used as the control samples.
(a) Sample size (b) Finger jointed timber specimen
Figure 6: Structural scale specimen
Experimental Procedure
The three-point bending and uniaxial compression tests of Test Series 1 were
conducted on the specimens in accordance with BS 373:1957 Code of Practice,
using a universal testing machine (UTM). A compression testing machine was used
in Test Series 2 to determine the ultimate axial compression capacity of the large
non-standard specimens. Before applying the load through the UTM, the average
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