Building Information Modeling

In December 2011, it was approved by the US-based National Institute of Building Sciences as part of its National Building Information Model (NBIMS-US) standard. The initiative intends Lithuania to adopt BIM, Industry Foundation Classes (IFC) and National Construction Classification as standard. BIM is often associated with Industry Foundation Classes (IFCs) and aecXML - data structures for representing information - developed by buildingSMART. As some BIM software developers have created proprietary data structures in their software, data and files created by one vendor's applications may not work in other vendor solutions. CIS/2 enables seamless and integrated information exchange during the design and construction of steel framed structures. 4D BIM enables a sequence of events to be depicted visually on a time line that has been populated by a 3D model, augmenting traditional Gantt charts and critical path (CPM) schedules often used in project management. The supporting processes of building lifecycle management include cost management, construction management, project management, facility operation and application in green building. A BIM is a shared knowledge resource for information about a facility forming a reliable basis for decisions during its life-cycle; defined as existing from earliest conception to demolition. Approaches include referencing key metrics such as the Facility Condition Index (FCI), or using 3D laser-scanning surveys and photogrammetry techniques (separately or in combination) or digitizing traditional building surveying methodologies by using mobile technology to capture accurate measurements and operation-related information about the asset that can be used as the basis for a model.

Use of a shared digital representation of a built asset to facilitate design, construction and operation processes to form a reliable basis for decisions. The use of RDS-CW offers the prospect of integrating BIM with complementary international standards based classification systems being developed for the Power Plant sector. GMW Computers Ltd, developer of RUCAPS software - referring to the software's use at London's Heathrow Airport. Dynamic information about the building, such as sensor measurements and control signals from the building systems, can also be incorporated within software to support analysis of building operation and maintenance. This information is used to support operations, maintenance and asset management once a built asset is in service. Fire safety has been highlighted in relation to global supply chain management. Fire safety policies apply at the construction of a building and throughout its operating life. A typical fire safety code includes administrative sections about the rule-making and enforcement process, and substantive sections dealing with fire suppression equipment, particular hazards such as containers and transportation for combustible materials, and specific rules for hazardous occupancies, industrial processes, and exhibitions. Poor software interoperability has long been regarded as an obstacle to industry efficiency in general and to BIM adoption in particular.

BIM software also defines objects parametrically; that is, the objects are defined as parameters and relations to other objects so that if a related object is amended, dependent ones will automatically also change. The briefing recommended that buyers seek greater visibility of fire safety and other risks across the supply chain and identify opportunities to improve standards: "buyers can encourage change through more responsible and consistent practices". Icynene is more expensive compared to traditional insulation methods. Green building practices shun Fiberglass insulation. Building information models (BIMs) are computer files (often but not always in proprietary formats and containing proprietary data) which can be extracted, exchanged or networked to support decision-making regarding a built asset. Combining models enables visualisation of all models in a single environment, better coordination and development of designs, enhanced clash avoidance and detection, and improved time and cost decision-making. For the professionals involved in a project, BIM enables a virtual information model to be shared by the design team (architects, landscape architects, surveyors, civil, structural and building services engineers, etc.), the main contractor and subcontractors, and the owner/operator. It also covers spatial relationships, geospatial information, quantities and properties of building components (for example, manufacturers' details), and enables a wide range of collaborative processes relating to the built asset from initial planning through to construction and then throughout its operational life.

A CDE is used to share data across a project or asset lifecycle, supporting collaboration across a whole project team. BIM can bridge the information loss associated with handing a project from design team, to construction team and to building owner/operator, by allowing each group to add to and reference back to all information they acquire during their period of contribution to the BIM model. BIM also prevents errors by enabling conflict or 'clash detection' whereby the computer model visually highlights to the team where parts of the building (e.g.:structural frame and building services pipes or ducts) may wrongly intersect. A norm in 8 parts is also being written to support the transition: UNI 11337-1, UNI 11337-4 and UNI 11337-5 were published in January 2017, with five further chapters to follow within a year. These different views are automatically consistent, being based on a single definition of each object instance. Additives such as latex or bitumen are added to increase water resistance. Moist-spray (also called stabilized) cellulose uses less water to speed up drying time.

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