Autodesk Revit 2018.1 Precast Concrete Solutions

In the early stages of a design the decision to use precast or In Situ concrete on structural components may not have been fully considered. There are many factors that could influence the design and ultimately the construction processes that are implemented. Some typical benefits of precast is Quality control and speed of construction since we are not working with ‘wet’ materials and not having to wait for the concrete elements to fully cure before other structures can be assembled. However, designing with precast elements is a little like a Lego set, you can only create certain forms with economy!

Revit 2018.1 Precast

Autodesk Revit 2018.1 now incorporates a precast module that was acquired from IDAT a few years back. This solution allows for the conversion of planar walls and floors to precast elements which is perfectly suited to the design workflow as outlined in the above paragraph. We can take the initial design and then at a later stage decide to convert these into precast elements.

Shown below are the new precast tools found on the Revit 2018.1 Ribbon.

Revit 2018.1 Precast Ribbon

As you can see from the image above the tools are focused around the division of singular elements such as walls and floor slabs. The splitting of the walls and floors are governed by Configuration settings. For example, you can set a maximum weight and maximum set of dimensions for lifting and transportation. These tools automate the creation of Revit Assemblies which enable the detailing of each individual precast element and the output of CNC code for UniCAM (Unitechnik) and PXML (ProgressXML). There are many settings that the user can tweak and change and below you can see the configuration for the walls maximum dimensions, weight and jointing.

Cast Wall Settings

Another task that the precast module automates is the placement of anchors, bushings and connectors. These are standard Revit families that can be replaced with specific manufactured parts for full coordination and costing.

Precast Anchors and Loop Connectors - Revit Precast

The reinforcement bar is also added via intelligent macros that allow the end user to configure typical arrangements of reinforcement bar. There is not currently an automated way of placing reinforcement bar around openings such as doors and windows but this bar can be added to the part with the standard reinforcement tools. In the below image you can see that the Area and Edge reinforcement can be customised and also have a library of types configured.

Revit Precast Reinforcement configuration

One of the most powerful features of this software is the ability to generate automatic drawings to detail the precast elements as well as the cast in connections and other placed objects such as electrical voids and similar.

Precast Wall Details - Drawings Sheet

The above image shows a typical drawing that is fully automated. Note that the centre of Gravity is also located to allow for the planning of lifting. The panels also support the tilt method of construction which is also useful.

Check out the 10min Tutorial video below.


Modelling Revit Piling from Microsoft Excel

Recently a few contractors have indicated that they would like to be able to create a 3D model of piling from a piling schedule produced by a consultant. This is achievable using the Excel Based model generator which can be found on the Extensions ribbon. You will need to have Microsoft Excel 2010 installed if you are using Revit 2013.

Excel Based Model Generation

I have started off by taking an existing pile schedule from an FPS spread sheet and then copying this into the Excel Based model generator. You can see that I have used some of the spare columns to convert some values from meters to millimeters  anything outside of the marked columns you can use for your own calculations.

Format of Data

Make sure that you have the families that you want to use loaded into the active project and that you use the Footings tab as shown in the above image. Also take note of the default units and make sure you convert to the correct values. Once this is done and you think you have all the correct values in the spread sheet you can verify the data. You will see this on the quick access toolbar at the top of the Excel based model generator. If the data is verified then the last icon will proceed to produce a Revit model.

3D piling model  in Revit

That’s it, pretty straight forward and potentially a massive time saver.