Draft 2015 LOD Specification Available for Comment

By BIMForum on July 23, 2015

BIMForum LOD Specification 2015 Draft now Available for Public Comment

The BIMForum today announced  that the 2015 draft of the Level of Development (LOD) Specification for Building Information Models will be available for public comment through August 31, 2015. Anyone may download the draft specification for free at and comments may be submitted via email to

The LOD Specification is a reference standard that enables practitioners in the AEC industry to specify and articulate with a high level of clarity the content and reliability of BIM data at various stages in the design and construction process. It defines and illustrates characteristics of model elements from different building systems at different levels of detail.

What’s new in the 2015 draft:


*         More graphic illustrations for various building systems

*         The geometric specifications are now known as “Part A”

*         A new document, called “Part B,” begins to address development of non-geometric information