Building Product Data Models
Building product data model definitions are being developed /
collected within PICTOR project
"Product Model Evironment for Construction Projects"
of STAR research program
"System engineering in construction" at VTT Building Technology
The building product data models describe building information
(e.g. about building elements) that is created, used and exchanged
by various disciplines during the construction process.
- Product data models describe the representation of building information.
This forms a basis for implementation of product modelling tools, and for
sharing and exchanging of product model data in computer interpretable form.
- Detailed, formal definition of building information (classes, properties,
relationships and constraints) is required for unambiguous exchange and
interpretation of product data.
- In the project the product data model definitions are partly collected
from ealier projects, partly new definitions will be developed. See also
HVAC product data model and
production data model.
- Modular definitions of building product information about building,
building systems, spaces, building elements etc.
The definitions are in the form of so-called Object-cards including
EXPRESS and EXPRESS-G definitions and some additional explanations. Each
Object-card describes one particular object (class) and its relationships.
- The building product data models are used in the implementation of
integrated design/planning applications (like HVAC application,
construction planning application).
- They are also planned to promote Finnish RATAS developments towards open information
system for the construction industry.
- The models also enable exchange of simple building product model data in standardised
Impact on process lead time
Product modelling, information sharing and exchange of product model data in computer
interpretable form contributes to construction process lead time reduction by:
- Laying basis for systematic, integrated management of information and supporting
product model applications throughout the life cycle of buildings, thus improving
the information process of construction.
- Promoting data exchange to be done on the level of product data instead of
- Eliminating need for human interpretation, errors and rework in data exchange.
Point of contact:
VTT Building Technology
P.O.Box 1801, FIN-02044 VTT, Finland
Tel: +358 0 456 4579, Fax: +358 0 456 6251
Updated 30.6.1995 by
Kari Karstila ,
Computer Integrated Construction research team,