Behaviour and Design of Steel Structures Lecture 3 Conceptual design

Engineer Ingenio (Latin) I create, devise, design Ingenious Ingenuity, creativity, engineering

History Military Engineers First engineers Designed and constructed Siege Devices Engines – Latin derivative Civil Engineers – Thomas Telford Steam Engines Denigration of word Engineer

Creativity Total experience –From conception, through design to completion of construction. Includes analysis, computers, drawing, etc., as tools to complete the design.

The Team Client Project manager Architect Structural Engineer Services engineer Geotechnical engineer Environmental engineer Transport engineer Quantity Surveyor Contractor

Vital Understand and be confident of what you are doing Need to be sure that your answer is correct and be able to justify your opinion Start with Paper and Pencil –WL 2 /8 –Back of an envelope Proceed with initial thoughts on Design development

Clients Brief Use Economy Site / Location Space Access Parking Facilities

Considerations Clients brief Architect Structural Engineer Services engineer Topography Ground conditions Access Material availability Economics Environment

Fees Scale Fees – old way –%age of final Contract Sum Contract total is £5m Fee at 4% is £200k Average Cost = £30/hour Hours = 6666 or 175 man weeks –Conception –Report –Design –Detail –Tender Documents –Construction Administration

Fees (Cont) Fixed Lump Sum –About 2% Target Fee –%age of Profit Term Appointment –Agree with Client for say 5 years –Fees by negotiation built around previously agreed rates.

Requirements Topographical survey Ground investigation Services survey Environment survey Sources survey Contractors survey

Designers Report Sketch proposals Considerations –Frame –Materials –Suitability Integration with Team Response from Team

Exercise Prepare sketch proposals for a steel framed building for the space defined. The room has to be capable of being partitioned into 3 rooms. Allow 2.0 m space in the roof for Services. Show dimensions and draw beam depths and column widths. Use the following as a basis Simple Beams : span to depth 1 – 10 to 1 – 15 Continuous Beams : 1 – 20 to

Behaviour and Design of Steel Structures Lecture 4 Simple Beam Design