Revit - rebar(part 1), Wall and area reinforcement - example 19
Download the full Revit Rebar tutorial PDF here
0. Intro – presentation of the problem
This Revit-rebar guide will explain how to place rebars in 3 different walls, a straight wall(W1), a curved wall(W2), and a curved wall with a slope(W3). We will be using 3 different techniques to accomplish the goal.
At W1, the “classic” technique will be applied, meaning placing rebars in section view. 3D rebar functions will be used at W2, and at W3 dynamo will help us generate and place some of the desired rebar shapes.
1. Rebar Cover
Before placing any rebars, make sure the rebar cover is adjusted and assigned for the Revit element. This is done by first add, remove, or modify existing rebar cover under rebar cover settings, then select the element and change the value under Structural, properties. Picture 2.
A green dotted line will appear, when placing a rebar in a section, this line represents the rebar cover, and the rebar will automatically snap to it. Picture 3
2. Set-up view
The second task I like to do before diving into the fun of placing rebars with the “classic” technique, is to set up my views, so I have good control and a nice overview. For the wall, I want one 3D view, 2 sections, and an elevation. A plan view might also be useful. Picture 4
Use the command WT to evenly distribute the views as shown below. The command TW will expand the view you are in to full screen. Picture 5
3. Placing rebar in the section view – U-shape
The first rebar we choose to place out is U-shaped rebar. But before that, It is a couple of options we need to address when pressing the rebar button.
Placement plan, is, in my case always set to Current Work Plane, (The other options might be useful if you have varying spacing between the rebars along the wall, for instance, at the end you want a spacing of 150mm, you can then use Near Cover Reference, and then drag the rebars from the end to the point where the spacing is increased to 200mm, the 200mm spacing is set out with new rebar.)
The next one is Placement Orientation, for our rebar with a U shape, we need to use the parallel to workplane option, as we want the rebar to be placed parallel to the section direction. (We will explore the other options later.)
Rebar set decides if we want spacing between our rebars, with a specific spacing, or a fixed number of rebars that will be placed out. In my case, I want a maximum spacing of 200mm.
When these choices are determined, and we have selected rebar shape 21, we can hoover over our wall in the section and the rebar will automatically snap top our predetermined cover for the wall.
The rebar is now placed, click the rebar, and apply a partition number and change the dimensions a, b and c to desired values.
4. Placing rebars in the section – straight shape
Placing the straight-shaped rebars, parallel to the work plane is done in the exact same way as placing the U-shaped once. (see video for walkthrough).
When placing the perpendicular 0-shaped rebars, the only difference is the Placement Orientation option, here set to Perpendicular to cover.
5. Area reinforcement
“All roads lead to Rome”. Instead of placing the straight rebars in the section view, another viable option is to use Area Reinforcement. This is placed out in the 3D-view (For the set-up of the 3D rebar view, see the color-rebar guide).
Select the Area button, click the element you want to place the area reinforcement in.
When the element is selected, the window under will appear. Here you will draw the area where the area reinforcement will be placed, with the draw tool. Be aware of the selection of the major direction, it will be determined which of the vertical or horizontal rebars will be placed closest to the edge of the wall. When the area is drawn, decide the rebar type and spacing under properties Layers
When done it’s possible to remove area system, you do it if you want to separate vertical and horizontal rebars with partition numbers, be careful when removing area system, it can’t be undone.