TY - JFULL AU - B. Noruziaan and A. Shvarzman and R. Leahy PY - 2015/7/ TI - Oriented Strandboard-GEOGYPTM Underlayment - A Novel Composite Flooring System T2 - International Journal of Civil and Environmental Engineering SP - 657 EP - 663 VL - 9 SN - 1307-6892 UR - https://publications.waset.org/pdf/10001254 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 102, 2015 N2 - An innovative flooring underlayment was produced and tested. The composite system is made of common OSB boards and a layer of eco-friendly non-cement gypsum based material (GeoGypTM). It was found that the shear bond between the two materials is sufficient to secure the composite interaction between the two. The very high compressive strength and relatively high tensile strength of the non-cement based component together with its high modulus of elasticity provides enough strength and stiffness for the composite product to cover wider spacing between the joists. The initial findings of this study indicate that with joist spacing as wide as 800 mm, the flooring system provides enough strength without compromising the serviceability requirements of the building codes. ER -