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BIM For Building Product Manufacturers

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This paper was written to help the manufacturing community under BIM and how to create models that will be used by architects and contractors.

This paper was written to help the manufacturing community under BIM and how to create models that will be used by architects and contractors.

Published in Technology , Business
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  • 1. Building Information Modeling (BIM) and Building Product Manufacturers Written By: Doug Bevill – President of Bevill and Associates and Peter J. Arsenault, AIA, NCARB, LEED-AP Graphs Courtesy of McGraw – Hill Construction and Bevill and Associates The process of designing, documenting, constructing, and maintaining a building is changing. Instead of treating these as separate steps, a truly more integrated way of thinking is emerging and, in many cases, being demanded by building owners. Building Information Modeling or BIM is one big part of that change and has been regarded as a central tool that has been bringing together architects, engineers, contractors, building owners, specialty consultants, product manufacturers, fabricators and others to look and think differently about the information that they use and the role that they each play in the design, construction and operation of buildings. BIM Definition and Characteristics In order to better understand the nature of this important tool, let’s take a closer look at how BIM is defined. According to the National Institute of Building Sciences (NIBS), “A Building Information Model (Model) is a digital representation of physical and functional characteristics of a facility. As such, it serves as a shared knowledge resource for information about a facility forming a reliable basis for decisions during its life cycle from inception onward.” The key here is that the BIM model becomes a long term shared resource for a building or facility from the earliest design conception, through construction, during the years it is operated and maintained, through any alterations, additions or adaptive re-use, all the way through to the end of its useful operating life and eventual demolition or deconstruction. Further, NIBS goes on to point out “Some have identified BIM as dealing with only 3D modeling and visualization. While important and true, this description is limiting. A more useful concept is that a Model should access all pertinent graphic and non-graphic information about a facility as an integrated resource. A primary goal is to eliminate re- gathering or reformatting of facility information; which is wasteful.”
  • 2. The integration of both graphic and non-graphic information in one place gives the Model much more value as a resource that can be accessed by many people instead of wasting time and money to duplicate. The current wastefulness and redundancy in building design and construction work is estimated at nearly $400 billion dollars annually plus notably more when operating processes are taken into account. Eliminating this waste has been a key motivator on the part of owners and others who seek a superior building outcome by incorporating a more coordinated non- redundant methodology. NIBS has also launched a specific initiative known as the buildingSMARTalliance tm which has compared the rise in the use of electronic modeling for buildings to similar changes that have preceded it in the aircraft, microprocessor and automotive industries. Based on those other industry successes, BIM is usually characterized as having several key features:  Digital or electronic format – the Model is created entirely on computers  Object-based – the information in the Model is not a series of lines and shapes as in many Computer Aided Design (CAD) applications, rather it is a collection of 3 dimensional “objects” that are inserted or virtually “built” into the Model. The objects are often selected or created generically in BIM software programs or custom created by design professionals.  Embedded Information linkage – beyond the physical representation of an object, the functional data (e.g. specifications, warranty, manufacturing information, etc.) associated with that object is embedded or linked to the BIM object and readily accessible and readable.  Interoperable – with information coming from multiple sources, the ability to openly and easily share that information in generic formats without the restrictions of proprietary software becomes critical. This point is common among a number of computer-based activities and has strong precedent elsewhere. In fact, the Institute of Electrical and Electronics Engineers (I- triple E) has spent a considerable amount of effort looking at this topic and offers this definition of interoperability: “The ability of two or more systems or components to exchange information and to use the information that has been exchanged”. A Model that incorporates all of these features lives up to the true definition of BIM and its ability to deliver desired results. The growing use of BIM Of course, any tool is only of value if it is actually used and put into practice. In order to understand the current and projected usage trends and perceived value of BIM in practice, McGraw-Hill Construction has undertaken a series of objective studies in partnership with NIBS, the American Institute of Architects (AIA), and others and published the findings as a “Smart Market Report – The Business Value of BIM”. The
  • 3. 2009 printing of this report updates the findings of the prior 2007 edition and reveals some insights into who is using BIM and why. This study is based on input from information gathering surveys from literally thousands of participants that came from all parts of the Architecture, Engineering and Construction (AEC) spectrum across North America. Some of the highlights of this study are summarized below:  Almost half (49%) of the total AEC industry is now using BIM. This usage level is up considerably since 2007 when the same study revealed that only 28% of the total industry was using BIM or BIM related tools at that time.  This represents some dramatic recent growth – a 75% increase in two years. Further, proficiency is up dramatically too with three times as many users characterizing themselves as advanced or experts – 42% in 2009 compared to only 14% in 2007.  In light of these findings, Steve Jones, one of the co-authors of this report from McGraw-Hill Construction has said “With about half the North American AEC industry already up off their beach chairs and at least wading ankle- deep in the BIM surf, we can stop hyperventilating about "BIM" and just do BIM as a regular course of business.”  All BIM users plan significant increases in utilizing BIM. Fully one third of all current BIM users surveyed report employing BIM on 60% or more of their projects today, but twice as many users expect to be at that level in the next two years. Of those not yet using BIM, half have yet to try it, although
  • 4. they are open to it, and at least 42% of non-users believe that BIM will be either highly or very highly important in the next five years. The trend of increased usage observed during the past two years appears that it will continue based on these survey results.  Different groups of users have differing usage levels, but the majority of users overall are seeing real business benefits directly attributable to BIM. The report breaks down some interesting observations about the different groups using BIM: o Architects: BIM is credited to have gotten its start within the architectural community and this early adoption has architects still reigning as the highest users of BIM. As many as 60% of architects report creating some form of BIM Model in their practice and two thirds of those report that they find high value in the core design development and construction document phases of a project. This value is based on higher productivity and a reduction in the need to re-work designs. o Engineers: Overall, this group of design professionals lags behind architects with only 42% of engineers reporting using BIM, which is actually lower than the usage percentage of contractors. Among the common resistance expressed by engineers is the availability of sufficient engineering content that is BIM compatible or a perception that this approach doesn’t apply to their particular practice of
  • 5. engineering. On the positive side, engineers see the reduction of conflicts and changes during construction as the top ways that BIM adds value to a project. o Contractors: This group is growing faster in usage than any other with 50% currently reporting using BIM or related tools compared to only 13% in 2007 – a four fold increase in only two years. This growth is likely fueled by the finding that nearly 70% of contractors that are using BIM are finding high value with greater chances of avoiding errors and omission problems during construction, enhancing productivity, avoiding conflicts, and improving performance on both budget and time schedule. o Owners: As a group, approximately 37% of building and facility owners report using BIM, even though many have yet to realize the long term operations and maintenance benefits. Nonetheless, 70% of those utilizing BIM for design and construction projects see positive value through such benefits as lower overall project costs, clash detection, avoiding rework, and a generally overall better construction outcome. o Material Fabricators: Accurate information and dimensioning are the keys to successful material fabrication in any construction project. By bringing fabricators into the design and construction process earlier rather than later, they can collaborate with the rest of the team to provide input and extract data from the BIM Model rather than recreate it separately. In this way the project can benefit from improved overall quality, easier constructability, the reduction of waste, better timeliness in fabrication schedules and a resulting improvement in affordability. o Building Product Manufacturers: This group is just beginning to realize the potential benefits of incorporating BIM into the way that they communicate and interact with all of the other players above. Some are developing their own libraries of their products as complete BIM objects. Commercial services are also working with a steadily growing number of manufacturers to make BIM objects of their products available to those creating and using BIM models. Overall, then, the report points out that “The ability of teams to create richer models and share more data with BIM has helped foster more collaborative decision making on projects. BIM has proven an effective tool for this delivery method, breaking from the tradition of handing off completed work from one team member to the next with little or no input from others.” It also summarizes the resulting overall benefits related to saving time and money through 1) conflict avoidance / resolution, 2) increased productivity / efficiency and 3) the avoidance of rework / changes.
  • 6. Beyond saving time and money, however, there are other overall benefits for all parties including 1) a better understanding of the project throughout the phases or stages, 2) better collaboration, and 3) better visualization. Some future trends also noted include the potential to reduce the need for submittals and shop drawings while allowing more time for design and less time for documenting / processing. Manufactured Building Products and BIM Modeling As noted above, building product manufacturers are beginning to become increasingly involved in providing their product information as fully developed BIM objects. This is coming about for a variety of reasons including:  Recognizing change: Manufacturers are beginning to see that BIM is quickly replacing CAD as the preferred design tool by the architectural, engineering, and construction community.  Filling a need: The creation of libraries of specific objects is time consuming and often not cost effective for design firms, particularly for objects of multiple manufacturers. Having readymade objects that are accurate, up to date, and customizable to suit a particular project helps architects realize the full potential of BIM through greater efficiencies of time and integration of data.  Staying current: Products change and so does BIM software. Manufacturers who are in for the long term recognize the reality of needing to keep their information and data updated with new product offerings and changes as well as maintaining full compatibility with changing software programs. Adopting and maintaining a BIM approach to conveying their product information provides manufacturers with the best way to integrate with the AEC community.
  • 7. Understandably, some project owners do not allow the pre-selection of a single manufacturer, favoring instead the open bidding approach of providing the design criteria in drawings and specifications for multiple manufacturers to demonstrate compliance with. In other cases, owners have prior experience or even standing accounts for particular products and manufacturers and want to ensure that those products get used again. In either case, a discussion with the owner at the outset of a project is important to ascertain what the basis of design will be in the project regarding manufactured building products. With more product information becoming readily available in BIM format and more collaboration of designers, constructors, suppliers, and manufacturers earlier in the design and construction process, the trend is clearly heading toward making specific product selections sooner rather than later. Hence, selecting and using specific products in the overall building model would appear to be consistent with that trend. Building Product Manufacturers and BIM The process of identifying who is writing product specifications for each division is as fragmented as the rest of the commercial construction industry. Architects have traditionally concerned themselves with specifying the products that represent the most risk. “In order to stay out of trouble with my friends in the architectural profession, I will say that there are still a considerable number of architects who write or oversee the specification of most of the products going into the building.” This said, the majority architectural firms leave the writing of most specifications to CSI or other industry certified independent specification writers. What we have noticed is that much of the BIM content available from the manufacturers is not interoperable with the architectural BIM model; therefore the content is not being used. As BIM consultants our firm begins by working with building product manufacturers and taking CAD files of their top SKUs, designing very rudimentary unfinished BIM product models. Followed by forming a customer council to review the models and tell us how to finish the design in a format that
  • 8. they would find useful in a BIM model. Our customer councils are made up of architects and general contractors since they have adapted to using BIM and provide very solid feedback. Manufactures are not the only segment of the building product industry starting to build BIM content; we are working with a few large distributors on creating complete systems from the various manufacturers they represent. There are complete BIM multi component systems being created by distributors for general contractors using generic industry product numbers. This has been effective because the contractor can drop this system into the BIM rendition of the building envelope and have a complete ceiling package for instance; with tiles, lighting, and other products without having to deal with each individual manufacturer. The system will include the three part specification, pricing and all of the warranty information for every product in the system. Best of all the system carries the distributor’s brand name empowering them to use any manufacturer they wish once they are awarded the project. This type of BIM packaging is being considered by door, frame and hardware, window, curtain wall, roofing and several types of manufacturers and distributors. For example designing complete system applications from many part numbers into one product configuration in lieu of a traditional multi-component product specification. This is a significant example of how BIM is changing the way building product manufacturers will need to rethink how they market to the design, engineering and contracting players. These complete systems empower the architect or contractor to insert the appropriate product system into the BIM model and all of the related parts included in the product system. This removes the need to specify each product on every product configuration and is compliant with BIM interoperability standards. This method, like in the ceiling systems space is being considered by various other building product distributors. The main difference is distributors will use generic industry product numbers in their BIM model to create a series of product systems and brand them as their own, and then send the content to various contactors. Once they are awarded the job the distributors will supply various manufacturers’ products at their discretion. Overall, then, creating complete product systems as BIM objects for building product manufacturers and distributors has the potential to contribute to more complete and accurate building designs that put the most applicable product in the right place. BIM Objects provided by Building Product Manufacturers and Distributors: When architects and contractors are selecting BIM objects prepared by building product manufacturers to incorporate into an overall Model, they should look for the following characteristics in those objects:  Complete and up to date embedded information: This is where the value of BIM for products really shines. All of the relevant information associated with a selected product should be readily accessed and readable from the BIM object. That means that manufacturers make and model numbers, full product specifications, cost / pricing information, production and delivery
  • 9. requirements should all be readily available. For the long term benefit of the owner, it should also include a link to the warranty, maintenance, and replacement information related to the product.  Parametric modeling capability: Most BIM software programs allow for automated interaction between different objects. This interaction is governed by a set of computer programming rules that an object must follow anytime a modification or insertion of an object is made. This process is referred to as parametric modeling and is one of the key advantages of using BIM. It means that an object not only provides data about itself, it also has the ability to interact with the rest of the model, such that a change in the object triggers a corresponding change to other parts of the model. For example, inserting a product system into a wall means that the wall has to change to accommodate it. If the product system is one of several and a schedule or chart is part of the model summarizing the details of all of the product system, then the schedule has to be updated. And if a particular product system has several options built into it, the selection of those options should automatically be reflected in all aspects of the Model. In simple terms, parametric modeling is the means to make this all happen.  Complete and open Interoperability: Anyone who has ever tried to open a computer file that produced either an error message related to non- compatibility or a display of unintelligible characters will readily understand the need for seamless integration of information from multiple sources. That is what is meant by interoperability – the ability to have a Model function and operate properly regardless of the source of the different parts of the information. The data from building product manufacturers and distributors, then, needs to be provided in a format that is compatible with total building Model in all respects.