Many architectural projects utilise Structural Grids to help set out steelwork, etc. Thankfully we have a dedicated Structural Grid line tool in Revit for just this purpose. Please don’t make the mistake of using simple 2D lines to represent your structural grids- you really would be missing out on the features of a great dedicated tool.
- Structural grids are 3D planes in our model world
- Creating/Adding structural grids
- Changing the grid labels
- Changing the length of the grid lines
- Adding an elbow to the grid bubbles
- Creating multi-segment grid lines
- Adding Columns to our structural grids
Structural grids are 3D planes in our model world
If you consider the structural grid in your project, you will appreciate that the grid lines are really the edges of 3D planes. If you look at the design in plan, you’ll see a series of grid lines. If you then take a vertical section through the plan, you’ll see the same grid lines running vertically up your building. And this is how Grid Lines work in Revit- they are true 3D planes that can be cut through. The benefit of this is that they are always coordinated and accurate. In 2D CAD packages (such as AutoCAD) you would have to manually draft out the positions of the grid lines both in plan and section. Makes changes to a grid line in plan and “you” have to make the corresponding change to the respective grid line in section. Well you can forget all that with Revit. You change the grid line in whichever view suits you and Revit will update it in all other respective views.
Creating structural grids
So how do we go about about creating Structural Grids in Revit? First of all you need to be in a plan, elevation or section view. Then you go to the “Architecture” menu. From here look on the “Datum” panel and find “Grid”……
Placing Structural Grids into your project is quite similar to placing Levels and also Reference Planes. Similar in the fact that it’s a “two click” operation. The first click to place the start of a grid line and a second click to define the other end of the grid line. Note that Revit will automatically name / number your grid lines. ie the first one will be numbered “1”, the second “2” and so on. At any point if you change the number of the latest grid line, Revit will automoatically try to follow a logical naming convention. For example, if you placed 5 grid lines and then change the last one from “5” to “A”- then Revit will name the next one “B” and so on.
When you are actually placing new grid lines, the default setting is for a single, straight grid line. You can see this default setting in the aobe image. If you need (say) an arc as a grid line, just change the the toggle from single linear element to one of the other tools. Note: The last tool in that palette (the green line with a small arrow on it) is the “Pick Lines” tool- this is an excellent tool when you already have lines /geometry in your project that you can use as a reference for your new grid lines.
Changing the grid labels
Now that we have some grid lines in our project, let’s take a detailed look at a grid line and it’s parts. Using the above image for reference, we can see:-
- The grid bubble (or “head”) with the it’s unique grid reference written inside it.
- a tick box that determines whether the bubble is shown on this end of the grid line or not
- an open circle control- use this to lengthen or shorten the the grid line. Just hover over this circle with your cursor- hold down your left mouse button and adjust the length of the grid line accordingly.
- The “Add elbow” control. This is exactly the same tool that we looked at for “Levels”
- An open circle control for the other end of the grid line. It works exactly the same as in (3)
- A tick box to either display or hide the grid bubble at the other end of the grid line. It works exactly the same as in (2)
As we said above, Revit will automatically number the grid lines as you create them. If you want to change their reference (ie the number or letter inside the bubble)- just select the grid line in question and then click on the text in the bubble. You will now be able to enter a new value. Rememer: Each grid line must have a unique reference.
Changing the length of the grid lines
Adding an elbow to the grid bubbles
Creating multi-segment gridlines
Adding Columns to our structural grids
- Structural Grids are 3D objects- so work in plan, elevation and section
- Grid References are created (ie named) automatically as you create each Gridline
- Structural Columns snap automatically to Grid intersections and stay aligned
- Structural Columns can be added to all Gridline intersections in one go.
|This tutorial is taken from "The Complete Beginner's Guide to Revit Architecture" FREE online course.|
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