Preparation of building structure - Roof modeling

Product	InstalSystem 5
Type of article	FUNCTION AND TOOL
Source for translation	2026-08-18

Description

The article describes the possibilities of preparing various kinds of constructions. The detailed description of the creation of the basic design cases of roofs could be found here: Basic design cases.

Functions and tools related to the creation or modification of the structure and related elements are the following:

• scope, tab:
  • ,
  • ,
  • ,
  • , For more information, see: Creation of dormers.
  • ,
  • ;
• scope, tab:
  • ;
• scope, tab:
  • ,
  • (to create );
• Operations related to the creation of during preparation of :
  • - ,
  • (right mouse button context menu),
  • .

Attention! In order to view the effects of any changes made during editing it is necessary to invoke .
For more information, see: Preparation of building structure.

Location in the program

scope

Icons of tools and functions related to the creation of are accessible in the and partly in the window on the bar, section when editing is enabled.

1. elements.

2. .

scope

Icons of tools and functions related to the creation of and its elements from the IFC file are accessible in and windows on the bar, section when editing is enabled, tab.

3. Create and its elements from IFC file.

Related operations

• operation is available in and windows on the bar, section when editing is enabled, tab. Allows to automatically generate on the basis of previously created and .
  

  

  4. .

  
  
• operation is available in and windows in the right mouse button context menu. Allows to convert element into .
  

  

  5. .

  
  
• function is accessible in and windows on the bar, section when editing is enabled, tab.
  

  

  6. .

  
  

Computation of building structure

• is available on bar, section .
  

  

  7. .

  
  

Example of use

The steps to be performed to create will depend on the format of the file used like an .

Working with DWG / DXF / PDF files

There are three ways to create in case the files of dwg, dxf of pdf formats are used:

1. Manual creation. Use the tools available in the program and listed above.
2. Automatic creation based on the function.
3. Automatic creation based on the function. In this case the program will generate the flat in accordance with the data set in the window, tab for the last . The roof edges with the corresponding elevations can be added manually.
   

   

   8. .

   
   

Attention! For user convenience, the program provides the opportunity to use two underlays - the plan view of the last storey and the roof plan view - on the same worksheet.
In order to be able to create correct using both underlayers, the following steps should be carried out:

• Make with roof plan view on the worksheet with imported plan view . For more information, see: Import underlay files;
• Scale the using the and the functions;
• to make the exact positioning of the underlays in relation to each other.

This is the way to .

For more information, see: Building generator.

The function .

For more information, see: Inserting a roof.

allows to create only one roof in a building. The rooms not belonging to the last are covered from above with slabs. If the building construction foresees the presence of a element in such a place, the can be easily converted into a using the function by previously dividing the with the operations.

The is the only element in the program that can create not only a strictly horizontal (or vertical) structural . Its further modelling is performed using the function, which . After the is performed, the modelled automatically cuts vertical partitions in the project. Note: During the creation of roof edges, they may turn red. This means that these edges cannot be realized. In such a case, the correction of elevations or slopes is required. For more information, see: How to eliminate common mistakes and diagnostic messages regarding roof modeling.

used for the multi-storey modeling

There are situations when the crosses 2 or more elements. In this case there is no necessity to correct the in accordance with the shape of the manually. The usage of the function allows to trim the outer part of the automatically.

Creation of a loggia

For more information, see: Creation of a loggia.

Working with IFC files

The program automatically interprets elements created in IFC format files.

9. .

For more information, see: Interpretation of roofs.

The icon is located on the section, tab.
The following guidelines should be followed when positioning this element:

• The is placed on an already finished and calculated without any ,
• After inserting the , there is no need to cut holes for the windows. The program will automatically update the partition model after the have been carried out;
• Avoid inserting at the edges of the . If this design situation does exist, divide the into 2 elements and move them appropriately close to each other.

in the aspect of designed

The module(s) does not require a complete . However, the presence of a element means that the of designed is based on the model and the edge and correctly adapted to the available slopes. The absence of the element in the project causes the of the to be equal to the value of the taken from the .

Additional information

The general theory of roof modelling is briefly summarized here: Roof modeling rules in InstalSystem-5.

If you have any comments on this article, please send us a short message at info@instalsoft.com.