The acceptability of an engineering material largely depends on the ease with which sits behaviour can be predicted under a given loading and working conditions. These predictions can be done based on thorough and extensive investigation of the micro-structural and mechanical response of the material. With the increased interest in plant fibre reinforced plastics, it becomes necessary to understand the influence of aspect ration on the mechanical properties of these composites. This book x-rays the influences of aspect ratio on the mechanical properties of Bamboo Plant Fibre Reinforced Plastics (PFRP). The tensile strengths were investigation and discussed in details. This book will serve as a reference material for engineers involved in development of new materials. Students taking courses in composites materials and all interested in materials science will find this book as a valuable asset. (The influence of the orientation on the mechanical strength were considered).