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LONG LIVE THE MODEL, THE DRAWING IS DEAD The Construction Industry in the era of IPD and BIM


In the 1400s Brunelleschi designed the Cathedral Dome in Florence and his ideas in the way to build the dome would revolutionise engineering and construction and it would be the largest dome for nearly half a millennium. Interestingly though Brunelleschi was not an Architect but a master goldsmith and a Guild Master. He designed, supervised construction and invented machinery to aid in its construction. There are 4 million bricks in the construction of the Dome and he invented a hoisting machine for raising the masonry needed for the dome. Brunelleschi kept many of his plans for building the dome secret as it was constructed, because he feared that his rivals would steal his ideas. Da Vinci made several drawings of the contraptions that Brunelleschi created for the Dome. 200 years later in London the Dome of St Paul’s was


designed by Christopher Wren and at about this time designers began calling themselves Architects and were different to the building Guilds. St Paul’s was built by Wren’s design but not with his supervision thus separating the role of the designer and the builder. In the 1800s Thomas Ustick Walter designed the Dome of the US Capitol. By this time Architects had formed professional societies. The Dome was built by a new entity the General Contractor. Walter had little to do with construction and now the separation of the Architect and the contractor was complete. This is the situation we find ourselves in today, where


in a typical project we have 3 main players as shown in diagram above, which shows that for the past 150 years the Client has hired Architects and Contractors separately. The diagram shows that there is no contract between the Architect and the Contractor, instead as part of our agreement with the owner we are required to exchange information necessary to build the building. The Architect supplies the Contractor with drawings and specifications, and the Contractor supplies the Architect with material samples and shop drawings. However, teamwork and trust do not spring naturally from this arrangement; instead the Architect and Contractor think of themselves as independent of each other, not as a team. This lack of trust creates problems where instead of information flowing freely both Architect and Contractor learn the more information means the more risk. This gap between the Architect and Contractor gets filled by other entities like construction managers, insurance companies and lawyers etc. These players do not design or build anything; instead they consume our effort, our time and money. This traditional organisation is broken, so let’s get rid of it. We still have the same 3 players, Owner, Architect and Contractor and this time 1 contract which binds all three players. This single contract


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mandates full sharing of information, risk and reward. This new business model which mandates teamwork to accomplish better buildings better prices and better value. The name given to this way of working is known as


Integrated Project Delivery or IPD and another new way of designing buildings is known as Building Information Modelling or BIM and is the backbone of performing the IPD. Building Information Modelling is the wave of the future


in Architectural design. The most exciting part of the architectural process is the initial design phase. BIM extends this process through all phases. Plans are generated from the 3Dmodel and design changes are instantly and completely revised. This linking not only facilitates the production of documents, it also minimises discrepancy between the design visualisation and the final realisation, thereby reducing Client risk and anxiety. With BIM a virtual building is created. Clients are allowed to walk through the design and receive accurate feedback about day lighting, materials and site context. This allows the Client to be intimately involved in the design process. Visualisation is no longer an issue, and changes can be made and evaluated instantly on the computer screen. BIM facilitates the economic use of materials and helps to resolve conflicts between structural, mechanical and architectural elements prior to construction. BIM enables sustainable or green building and is not a


catchphrase for environmentalism but more appropriately, it is a sound building practice based on the latest science. Sustainable design not only addresses the bottom line, but lifecycle and maintenance costs, energy efficiency, community amenities and reusable materials. It considers regional climate, solar orientation and the long term impact of development. Through proper analysis the negative impacts of development can be minimised. The UK government have mandated the use of Building


Information Modelling (BIM) on all its future projects, the industry is facing sweeping changes in long established ways of working. The main drive behind this decision comes from Mr Paul Morrell who is the government’s chief construction adviser. He has stated that he was “convinced that BIM is the way to unlock new ways of working that will reduce cost and add long term value to the development and management of built assets in the public sector.” BIM Architectural services in Saltburn have been early


evangelists for this movement and it looks at last that others are realising it as well. The drawing is dead, long live the model. Don McCabe


BIM Architectural Services. 07789 415312 PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com


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