How to build a stairs and parapet with a BIM software for architectural design? The Daegu Gosan Public Library project with video explanations.

From the typical technical standpoint, there’s not much involved in setting up a staircase and its geometrical parameters. A few formulas for calculating Rise and Run, a bit of experience and you’ll soon find your way to sizing this important element for any type of multi-storey building. But the great innovation derives from the use of BIM software for architectural design and the ability to model the entire element directly in 2D or in 3D, with dedicated parametric objects and adapt it to the surrounding context of existing elements.
Another strong point is that all views are continuously updated and displayed instantly in order to check and verify the entire design process.

Let’s see how the internal staircase of the Daegu Gosan Public Library (a project by the MARTIN FENLON ARCHITECTURE design firm) was built together with its peculiar parapet. In this case study, we’ll see how the design phases were addressed using the Edificius BIM design software.

Modelling a staircase with a BIM software for architecture

These videos show how it was possible to create an entire staircase object with two ramps that have a different planimetric directions. In the following steps, we can then see how the parapet was modelled.

Modelling the Stairs object

  • Min 00:00 – the STAIRS object is selected from architectural menu. The first click inserts the object in plan view and opens the dedicated Editor.
  • Min 00:15 – the first ramp is placed and rotated using the object grips directly in plan view. The “Edit Object” option allows the designer to easily adapt the geometry, in fact, we can change its width, whereas, in the ramp properties section, we can define its rise and run.
  • Min 00:40 – For the second ramp we can see how the alignment features work so as to give it the same direction as the adjacent wall.
  • Min 01:00 – To connect the two ramps you need to edit the last run of the first ramp and the first run of the second. At this point, the ramps are connected up automatically.

Modelling the Parapet

  • Min 00:00 – For this particular modelling procedure, we can see how the MagneticGrid comes in very useful. The visibility settings allow us to isolate the stairs object and have a better view of its geometry without any of the surrounding elements. Once the MagneticGrids are setup correctly, we can start off with modelling.
  • Min 03:30 – Now we can see how the top profile of the parapet is modelled.

In the video below, besides seeing some of the most important steps, you can also see the final effect of the staircase thanks to Edifcius’ integrated Real Time Rendering engine.

Click here to download and start using Edificius, the architectural BIM design software