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Design and Manufacturing Design of a stair climbing trolley for manual load transfer. The process of design and analysis will include Computer-aided modeling, Stress simulation, and as well as material selection. The main objective: – Light frame design, smooth moving on stairs, easy to operate, robust and high functioning, foldable when storage. – The device should be able to bear up to 100kg – The cost of the device should be comparable to that of a conventional consumer-grade trolley If successful, this trolley should provide increased safety both in the home and in the workplace