ACI 131.2R-2017
Guide to Use of Industry Foundation Classes in Exchange of Reinforcement Models

Standard No.

ACI 131.2R-2017

Release Date

2017

Published By

ACI - American Concrete Institute

Latest

ACI 131.2R-2017

Scope

This guide is intended to be used in conjunction with IFC 2x4 (IFC4)@ Addendum 1 (buildingSMART International 2015). This guide provides human-readable description of entities@ attributes@ property sets@ and relationships for reinforcing steel used in buildings and nonbuilding structures@ that can be used by software developers to prepare machine-readable data exchange protocols. Geometry@ position@ attributes@ and other information are provided for reinforcing bars@ welded-wire reinforcement@ bar couplers@ bar terminators@ and other items that are commonly included in reinforcement models. In addition@ information related to the bundling of bars for shipment and the tracking of releases is included. This guide describes the MVD that is used in the exchange of reinforcement information@ but does not provide detailed descriptions of IFC syntax and modeling requirements. buildingSMART International (2013) provides that information. A level of development (LOD) specification (BIMForum 2015; American Institute of Architects 2013) is a reference that enables practitioners in the architecture@ engineering@ and construction industry to specify and articulate@ with a high level of clarity@ the content and reliability of building information models at various stages in the design and construction process. Data exchanges described in this guide vary from preliminary modeling of reinforcing steel to fabrication-ready information to drive computercontrolled shop equipment. This range of LODs supported by this exchange is from 300 to 400@ described as follows. a) LOD 300: The model element is graphically represented within the model as a specific system@ object@ or assembly in terms of quantity@ size@ shape@ location@ and orientation. Nongraphic information may also be attached to the model element. b) LOD 350: In addition to the information provided by LOD 300@ interfaces with other building systems are provided for the modeled element. c) LOD 400: In addition to the information provided by LOD 350@ detailing@ fabrication@ assembly@ and installation information are provided for the modeled element.

ACI 131.2R-2017 history

• 2017 ACI 131.2R-2017 Guide to Use of Industry Foundation Classes in Exchange of Reinforcement Models