Strength properties’ tests are conducted in the form of small clear sample. This paper aimed to acquire the strength group of fast-growing indigenous species of Aras and exotic species of Acacia mangium. Thus, the information of strength properties of species is acquired from strength property's test at green and air-dry conditions. The required information namely, bending parallel to grain, compression stress parallel to grain, shear parallel to grain and modulus of elasticity. The ultimate stresses obtained from strength properties of the species is to be converted into basic and grade stresses to determine the strength group of the species based on MS 544: Part 2 (2001). The results from the study indicated that, Acacia mangium classified under strength group SG5, whilst Aras was classified under strength group SG7. The timber is classified as medium density of Light Hardwood ranging from 0.37-0.52 g/cm3 at air-dry condition.

Acacia mangium is one of the most popular choices in the reforestation and rehabilitation of abandoned shifting cultivation areas dated back to the 70's. This paper looks into the evaluation of mechanical strength and physical properties in structural size at green condition for Acacia mangium. The mechanical strength properties tests were referred to the modulus of rupture, modulus of elasticity and tensile strength. Meanwhile, physical properties determination referred to basic density and moisture content. At green condition, Acacia mangium had been identified under the strength group SG6. It was found that strength value of modulus of rupture was higher than the tensile strength value with 44% stronger in bending compared to in tension. At the structural size, the mean value for moisture content and basic density at green condition were reported with 73.03% and 0.54g/cm 3 respectively.

Nowadays, the hardwood category which refers to heavy hardwood species no longer sustains tothe market demand. The harvesting of this wood category takes longer period of time. Thus, several studiesin timber engineering have been carried out to investigate the fast-growing indigenous species as thealternative to heavy hardwood categories. For this purpose, fast-growing indigenous species of Engkabangjantong were selected and also the test samples were prepared in small clear specimens. The British Standard,BS373.1957 method of testing small clear specimens of timber was adopted to evaluate the strength propertiesof the species. The strength properties determinations were referred to hardness, cleavage and shear parallelto grain. The results were represented into two different grain directions namely tangential and radial at twodifferent conditions, i.e. green and air-dry condition. It was found that, hardness strength at tangential washigher than radial for both condition green and air-dry with 4.71and 8.86%, respectively. At cleavage strength,it was reported that tangential possessed higher strength values than the radial for both conditions green andair-dry with 23.06 and 27.22%, respectively. Shear strength at tangential was higher than radial for bothconditions green and air-dry with 11.70 and 8.58%, respectively

Strength properties’ tests are conducted in the small clear sample. This paper aim to acquire the basic and grade stresses of some fast growing species thus identifies its strength group. Thus, the information of wood properties from different species and condition are acquired from strength property's test. The required information namely, bending parallel to the grain, compression stress parallel to grain, shear parallel to grain and modulus of elasticity. The condition of the trees which is referred to green and air-dry condition. Three different species which are referred to exotic species of Acacia mangium and indigenous species of Aras. The results from the study indicated that, Acacia mangium classified under the strength group SG5, whilst Aras was classified under the strength group SG7. The timber is of medium density Light Hardwood ranging from 0.37-0.52g/cm3 air-dry condition.

Aras had been selected and tested in small clear specimens. Sampling of test specimens are made from three sections of the tree bole namely from bottom, middle, and top parts. This paper looks into the information of strength properties from three sections of sampled. The strength properties test required are the modulus of rupture, modulus of elasticity and compression stress parallel to grain. Meanwhile, the physical properties' test referred to moisture content and basic density. The testing conducted in two different conditions of the trees, which were referred to green and air-dry condition. It was found that the average mean values for modulus of rupture, modulus of elasticity and compressive stress parallel to grain tested at green condition were 47.52N/mm 2 , 6358.56N/mm 2 and 22.42N/mm 2 respectively meanwhile at airdry condition were 70.49N/mm 2 , 8217.64N/mm 2 and 34.07N/mm 2 respectively. Meanwhile, the average mean values for moisture content at green condition were 83.34% whilst at the air-dry condition were 12.33%. Basic density remains unchanged from both conditions.