A designer knows where to add/ remove material, how to use the known resources to defend the unknown circumstances, use the type of material to meet strength, ensure safety and price criteria, make it more durable, energy saving, and apply creativity to solve the problem. The selection criteria for hardware depend on various parameters like safety, strength, aesthetics, cost effectiveness, maintenance, and user friendliness. Safety [caption id="attachment_52520" align="alignleft" width="302"] Anti-fall restrictor[/caption] When selecting any hardware, safety should be the top priority. The hardware will be considered as the secondary loading structures in most of the applications like facades, railings, etc. The hardware should have built-in safety features such as fail-safe, safe-life mechanisms, redundant components, and error detection and correction capabilities to minimise the risk of accidents and failures. Strength The design of any hardware should have an optimal proportion to the mass of the system and external load (wind, live...