Prepare architectural drawings, showing internal and external layouts of the buildings.Analyze architects' or other designers' concepts, and prepare preliminary sketches and detailed instructions.Use computers or manually produce designs, detailed drawings and documentation.Prepare WORKING drawings showing plans, elevations, sections, materials and finishes, as well as other aspects such as layouts, plumbing, drainage, car parking and landscaping.Calculate the quantity and quality of materials needed, material and labour costs and project completion dates.Interpret client briefs and prepare and develop sketch plans for client approval.Help prepare building specifications for building plans to suit individual clients.Represent or assist architects on building sites to make sure that plans and specifications are followed.Liaise with local government organizations.Examine relevant codes and by-laws in the course of undertaking project documentation.