SEAA $2223(2023/2024-1)$

MECHANICS OF MATERIALS AND STRUCTURES GROUP PROJECT $(10\%)$

Your consultant engineering company has been awarded a project to renovate a dining hall by replacing the existing arch timber truss with compound timber truss. As a structural engineer, suggest three suitable types of timber trusses for the dining hall that can accommodate $300$ people. The client requires you to choose one out of three suggested trusses with justification that require abstract thinking, including photograph of existing truss. Analyse the internal forces of the selected truss by applying point loads of $30kN$ at the necessary joints, based on fundamental knowledge of mechanics. Submit a report consisting of plan view drawing of the dining hall with its facilities, including wide range dimension of truss $($i$.$e: span, height, inclination angle of the roof, column location, distance between trusses etc$).$ Propose the suitable cross $-$ sectional area of the selected truss that are safe for all members at allowable tensile and compressive stress of $200\frac{N}{m}{m}^2$ and $300\frac{N}{m}{m}^2,$ respectively. Maximum deflection of the selected truss must not exceed $25mm.$ Propose the most suitable size and numbers of bolts at an allowable shear stress of $100\frac{N}{m}{m}^2$ that support structural engineering design.