(Solved): ask an expert QUESTION 1 (20 Marks) You are a junior engineer working on the construction of a 10-me ...

ask an expert QUESTION 1 (20 Marks) You are a junior engineer working on the construction of a 10-meter-wide pedestrian bridge. The construction team needs a temporary truss support system to hold a formwork deck before casting concrete. The chief engineer has assigned you to design and analyze a triangular truss made from standard steel scaffolding pipes. This truss will act as a temporary roof beam to support loading from formwork and construction workers. Project Drawing: \begin{tabular}{|l|l|l|} \hline Step & Instruction & Details / Labels \\ \hline 1 & Draw a horizontal line towards the \( +x \) axis direction & 10 m long. Label left end A, right end B. \\ \hline 2 & Divide the top chord into 5 equal parts & Mark points every 2 m : A1, A2, A3 (between A and B). \\ \hline 3 & From point A, draw a vertical line towards the \( -y \) axis direction & 6 m long. Label the bottom point as C. \\ \hline 4 & Connect C to B with a straight line & This forms the bottom chord of the truss. \\ \hline 5 & Draw vertical lines towards the \( -y \) axis direction from A1, A2, A3 & Each connects to the slanted line CB; label intersections as D1, D2, and D3 respectively. \\ \hline 6 & Draw internal diagonals & Connect: C-A1, A1-D2, A2-D3 \\ \hline 7 & Add vertical loads towards the \( -y \) axis direction & On A1: 200 N , A2: 150 N , A3: 100 N \\ \hline 8 & Add inclined load at point B towards the \( -y \) axis and \( +x \) axis direction. & 500 N force at a 3-4-5 triangle direction (4 horizontal, 3 vertical, and 5 hypotenuse) \\ \hline 9 & Add supports & A = pin support, C = roller support \\ \hline \end{tabular} (a) Sketch the FBD of the truss support system from the project drawing. (5 marks) (b) Calculate the magnitude of the resultant force. (6 marks) (c) Calculate the coordinate angle of the resultant force (3 marks) (d) Calculate the couple moment at point C (6 marks)