**7. Strength properties of composite board from compressed oil palm fronds**

The strength characteristics of wood are stratagems of its resistance to exterior forces, which direct deform its mass [35]. Such forces depend on their measurement and loading method (bending, compression, shear, tension, etc.). Tsoumis [59] declared that wood manifests various strength properties in different growth paths; therefore, it is strongly anisotropic. According to Bowyer et al. [60], In structural applications, strength properties are usually the most important aspects to define the products used. There are appointed as one of the primary criteria for selecting the material. Strength of wood structural practiced for wall sheathing, floor joint and rafters, and also subflooring application. [35].

Several strength properties were tested in this study, including static bending strength (modulus of elasticity (MOE) and modulus of rupture (MOR)) and compression strength. The testing was carried out based on International Organization for Standardization (ISO) standard for the strength properties evaluation. The analysis of strength properties of the composite board from compressed oil palm fronds has specifically looked into the effect of types of resin, maturity groups, and portions. Phenol and urea-formaldehyde were the resins used in producing this composite board.
