BIM at HOK
Published 30 January 2007
HOK has pioneered the use of BIM in architecture and with Revit Building at the heart of its design process, the firmİs London Office is already starting to link in Revit Structure for structural design, analysis, co-ordination and documentation.
All industries and professions have their barometers ± usually a group of forward-looking firms that are ready to assess and take up new ideas and, consequently, help to signal the way ahead for others. When it comes to design software, HOK is one of these early adopters.
The companyİs CEO, Patrick MacLeamy is renowned in the industry for his views on using IT to work in a more effective way: ıAround the world, I want people to think of us as the smartest firm out there for managing technology and information,¯ he says.
His views are echoed by his CAD director, Mario Guttman, who commented: ıItİs about the building industry using computers and new ways of working to be more efficient ± and create a better build environmentÍ. As a firm, HOK chooses to lead.¯
With this in mind, it is significant that HOK has become the latest large global company willing to stand up and be counted on Building Information Modelling (BIM) - a building design and documentation methodology characterised by the creation and use of co-ordinated, computable information about a building project in design and construction.
As a result, its London office has bought 150 licences of Autodesk Revit Building and is already working on a full range of projects ± around 15 in all ± across the practice. It is now well on the road to BIM with plans to integrate the structural design into the Single Building Model when the time comes.
UK CAD manager, Miles Walker, says that the benefits will be huge, and will become increasingly evident as projects progress. ıOne of the main strengths of BIM is that it ensures projects are in a good position when they reach the construction phase. For example any clashes will have been ironed out long before. Because data has been enhanced throughout the design process, the central model holds all the information needed and this can be shared with engineers, construction teams, the clients and, even when the time comes, facilities managers.¯
" Even senior designers who would not usually have much to do with CAD are finding they like using Revit Building. Rumour has it that they are even playing around with it at the weekend. Technology has to be compelling for that to happen. "
In 2006 the HOK board pledged itself to an idea it called HOK buildingSMART. This self-explanatory concept would be applied to the entire building process from concept design through to facilities management and the ultimate aim would be a single, integrated building model throughout these phases. Or, in other words, BIM.
To help reach this goal it committed to a suite of software products including Autodesk Revit Building. It also set itself the task of piloting Revit Building on over 20 projects worldwide during the first year.
Revit Building is purpose-built for BIM, enabling users to work in a single model environment holding all current design data. Its parametric technology co-ordinates the entire model every time a change is made, so helping to eliminate errors through using outdated data and saving the time taken to change every aspect of a design.
Walker explains that the concept of a single building model was not new to the practice. ıWe had begun to move towards the idea on a major healthcare project, the Barts and London Hospital, a few years ago. This was designed using Autodesk Architectural Desktop.
ıHowever, Revit Building does require a shift in culture. We wanted to move the emphasis back from the technology to the design, giving architects more control for longer.¯
In the UK, HOK has been working with Autodesk reseller partner Excitech which has implemented Revit Building and developed bespoke training programmes. Around 60 staff have been trained on Revit Building and from the beginning, the focus has been senior designers ± rather than technicians ± first. Now the 20 pilot project landmark has been and gone. The London office has embraced the new technology wholeheartedly and already has around 10 projects running on Revit Building, all at various stages. The variety of these ± they range from a 50 storey tower in Istanbul to a new airport terminal in Delhi ± certainly shows that the software has been put through its paces.
A major focus has been a large London office building for an international financial institution. The project is now at Stage D and HOKİs structural engineers are linking the single Revit Building model with Revit Structure for structural design, analysis, co-ordination and documentation. This will cut out the need to re-create and re-enter data manually during the next stages of the project.
ıThis is one of the major benefits of BIM. Once a single model has been created, it can be shared with other disciplines further downstream. All the time the model is being updated and populated with further important information.
ıThereİs no need for each stage to re-create their own data or for paper to be sent to and fro.¯
ıAs CAD has progressed, weİre recognising that 2D drafting is actually at odds with the way architects think. It had become a parallel process, rather than an integral one,¯ explains Walker.
ıOn the other hand, Revit Building helps architects realise their ideas faster. They can put down their initial concept and everything builds on that. Because more detail can be added and, therefore, better co-ordination information is available earlier in the design, many issues can be settled sooner, taking the pressure off the working drawing stage,¯ he adds. Because Revit Building gives architects more freedom to design, the overall consensus is that it is ıengaging and enjoyable¯ to use.
ıEven senior designers who would not usually have much to do with CAD are finding they like using it,¯ says Walker. ıRumour has it that they are even playing around with it at the weekend. Technology has to be compelling for that to happen.¯
However, Walker is realistic enough to recognise that it is not always plain sailing. ıAnything that breaks new ground is a challenge and it has required good training and rigorous application.
ıYou have to push for change and itİs not always easy. That is, until everybody starts to see the benefits and then it makes sense.¯
He reports that he has found guidance from Autodesk, Excitech and user groups. ıHOK also has a network of worldwide CAD managers from its 24 offices and we regularly meet to exchange ideas. Itİs been healthy to bounce ideas off fellow users and as BIM becomes more widely used, the whole process will become more commonplace.
ıDesigners are now coming out of the first stages of the Heathrow Terminal 5 project (which uses a single model environment) and have seen the benefits of working this way. I think that if you work with people who have already had this experience, the path becomes smoother. They all say they wouldnİt go back to the traditional way of working, so as time goes on, the momentum will grow.¯
Bob Garrett of Excitech agrees: ıWeİve been able to use our experience working with BAA at Terminal 5 to advise HOK and thereİs a healthy exchange of ideas across the industry showing that the concept of BIM is beginning to take hold. Once people can see the practical benefits, it becomes far clearer to them and they understand what we have been talking about.¯
Although ADT and AutoCAD are still used in the background at HOK, new projects will use Revit Building wherever possible. ıWeİve used it enough now to be over the honeymoon period and weİre still eager. Already we have seen enhanced co-ordination, accuracy and also innovation ± all leading to higher quality,¯ says Walker.
ıI am still excited about the whole programme. Itİs been described as Ùgetting back to doing architecture againİ and this is a major pull. However, it is also much more. For example, it is a better way of managing risk as it ensures a far more co-ordinated team, but also well-documented projects.
ıItİs a real leap forward for us ± and for design and construction as a whole. However, we are proving there is a better, smarter way to meet the industryİs challenges.
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