What is Building Information Modelling?
Building information modelling (BIM) provides a 3D representation of existing buildings/infrastructure that allows architects, engineers and contractors to plan, design and manage projects more efficiently and effectively. It can also generate accurate 2D drawings including elevations, floor plans, roof plans, ceiling plans and details.
Once the accurate as-built site model has been created, the design possibilities are endless. Whether it is an addition, recladding, reroofing, renovation, window replacement, etc., the end result lies with the designer's creativity.
2D Drawings and BIM Applications
- ◉ Roof Plans
- ◉ Elevations
- ◉ Floor Plans
- ◉ Reflected Ceiling Plans
- ◉ Building Sections
- ◉ Details
- ◉ Technical Reports
- ◉ Working Drawing Sets
- ◉ Renderings
- ◉ Product Data
- ◉ Material Quantities
- ◉ Estimating
Why Should Asset Managers, Architects and Engineers Implement BIM?
There are many levels of BIM. In it's simplest form, it provides structure measurements and shapes but higher levels can provide a level of detail and information previously unavailable to building professionals. Not only does it provide a better method for managing projects, it can also be used for tracking changes over time, long-term strategic planning for asset management & budgeting, and centralizing building documents and information.
BIM Levels of Detail (LOD)
Conceptual Massing Model
- ◉ Least detailed
- ◉ General form/shape/size of building
- ◉ No detailed elements such as doors, windows, structural elements etc.
- ◉ No finishes of any kind
Basic Design Model
- ◉ Generic placeholders for systems
- ◉ Model contains most important elements such as openings, floors, columns, etc.
- ◉ Does not include doors, windows, finishes, etc.
- ◉ Basic measurements may be extracted
Standard Architectural Model
- ◉ Level of development is suitable to support costing and bidding
- ◉ Contains all basic architectural details and structural elements
- ◉ Models used to generate construction documents and shop drawings
- ◉ Measurements from models and drawings are accurate
- ◉ Finishes are included in this model
Higher levels of BIM incorporate cost data, project timelines and building life cycle.