Harnessing the power of 3D reinforcement modelling with Autodesk Revit and Naviate Rebar Extension12/16/2021 Many of us have been modelling and detailing reinforcement in Autodesk Revit for many years, however, some of you may still be using manual 2D solutions such as AutoCAD and Microsoft Excel. If you are 3D detailing, are you getting the most from your investment in Autodesk Revit? Are you modelling and detailing rebar efficiently? From a contractor’s point of view, are you using all the information from the model to manage prefabrication, safety and coordination? This blog investigates some of these areas. Modelling and detailing techniques With every release of Autodesk Revit brings additional rebar modelling and detailing tools that provide opportunities for different workflows and options for modelling rebar. Autodesk Revit 2022 gave the ability to move rebars in a set. The obvious uses for this tool are to omit bars that are not required or move bars that clash. However, you can also use this tool for staggered rebar layouts or any situations where you have the same rebar shape and diameter but in an unusual layout. The below image shows a column tying into a slab, the rebar is still in a rebar set which has been rotated. In Autodesk Revit 2019, freeform rebar was introduced, and was intended for the reinforcement of complex elements such as bridge decks, abutments and piers as well as curved elements. However, the freeform rebar can also be used for elements such as square and circular columns to place the main reinforcement and keep these in a rebar set. Freeform rebar and rebar constraints can be used to great effect when detailing complex elements which have tapers and varying rebar ranges. Rebar laps can be maintained with the rebar constraints by constraining the ends of the bars. Below shows a complex bridge pier from Autodesk Infraworks that is detailed in Autodesk Revit using a combination of freeform rebar and standard rebar sets. One of the best features I have seen in Autodesk Revit, is the ability to cut sections, plans and elevations wherever required and create drawing views. Below you can see the same bridge pier showing a typical elevation with the rebar presented and tagged. Sections can also be prepared and tagged to show bar marks and tick and tags. When detailing common elements such as columns, beams, foundations, or walls, you can utilise the Naviate Rebar Extension toolset which offers a good selection of macros to place rebar into typical concrete elements. However, as well as providing automation to the reinforcement of these typical elements you can also access the tools on the right-hand side of the ribbon to manage the visibility of rebar both in 3D and 2D views. This offers huge time savings when working with any reinforcement in Autodesk Revit.
Another great tool is the interference of reinforcement bars which checks for clashing rebars but also applies processes to allow for tolerances. For example, you could potentially ignore clashes on a 8mm diameter bar, or you can apply a tolerance of a few millimetres.
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