BIM Information Exchange Demonstration
JULY 23-25, 2008
COBIE Implementation Testing: Bentley
Bentley Architecture via IFC Coordination View
by Nicholas Nisbet MA (Cantab) DipArch (UNL) - AEC3 and William East, PE, PhD - Engineer Research and Development Center, U.S. Army Corps of Engineers
The following table provides the analysis conducted to evaluate software manufacturer compliance with the Construction Operations Building Information Exchange (COBIE) conducted for the 23-25 July 2008 Building Information Modeling Information Exchange Demonstration.
Evaluation of directly submitted IFC files into the specified COBIE spreadsheet format requires translation from IFCExpress to ifcXML and transformation of ifcXML to MS Excel 2003 XML Spreadsheet. This translation can be automatically accomplished using the ifcCOBIE program. ifcCOBIE is available free of charge through the IFC-BIM forum noted in the Reference section of this page. The translation and transformation routines in ifcCOBIE are freely distributed as part of the ifcCOBIE program.
The XML spreadsheet produced by the ifcCOBE creates default worksheet data for the required Warranty, Spare, and Installation worksheets that are required to be completed during facility construction.
Bentley COBIE File via extended IFC 2x3 Coordination View
||Prototypical COBIE specific IFC customizations and OmniClass support.
|IFC file submitted
|COBIE XLS spreadsheet
|Checker file results
| 05-System Worksheet
| 06-Register Worksheet
- C/T 4.071 = 460 components / 113 register types
| 07-Component Worksheet
- Some doors, windows and ducts not associated to any space
| Other sheets provided
||The sample file submitted included architecture spaces, sanitary, equipment and HVAC systems.
1 The web-based XML spreadsheet checker tested required designer-side worksheets only. Optional worksheets contained in the file such as detailed building geometry and default worksheet data created by the ifcCOBIE program for use by construction contractors, may have been removed to ensure the checker operates without Java memory errors.
Some local software manufacturer sales representatives may not be familiar with the performance-based, open-standard information exchange formats tested during the July 2008 meeting. As a result, these sales representatives may not be able to assist your use of this format. It is suggested that users contact vendor technical support and request "higher tier" technical support services.
There are also several third-party support contractors who have been involved in the development of these formats that could be of assistance. For information about these contractors, please post a request for assistance on the buildingSMART alliance list service. You will need to join the Alliance to use this service.
Another resource that might be helpful is a peer-to-peer forum supporting the Model Support Group of the International Alliance for Interoperability's (www.iai-international.org). The purpose of this forum is to help users find and share answers to their own questions regarding IFC-based information exchanges. This forum was used during the vendor communications leading to the July 2008 demonstration; as a result vendor technical staff may be reviewing forum postings to support their users. You must register, and be approved, for this forum however use of the forum is free of charge, at this time.
Back to the BIM Information Exchange Demonstration