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Frunsman
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Germany
Joined: May 7, 2024
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Problems with the length of the walls

Hello, we have a question regarding the length of the walls when connecting four walls together. Our walls have an outer length of 755 cm and 940 cm. The walls with 755 cm each have a thickness of 30 cm. The left wall, measuring 940 cm, also has a thickness of 30 cm, while the right wall, also 940 cm long, has a thickness of 12 cm. When we create it as a rectangle in the program, we are shown dimensions for the outer walls as 776 cm and 970 cm. This is probably because the length refers to the corner points, which are in the middle of the corner. Is there a way to adjust this in the program or to calculate the correct distance for the length of the walls? Thank you for the help!
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Keet
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Netherlands
Joined: Apr 8, 2022
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Re: Problems with the length of the walls

You can calculate the length you set in the Modify walls dialog like this:

The left and right walls connect to two walls 30cm thick and should be 940 on the outside. Since the length is calculated from the center of the walls your length for the left and right wall is 940-(30/2)-(30/2) = 910.
Your 755cm walls are connected to a 30 cm wall on the left and a 12cm wall on the right so the length in the modify walls dialog is 755-(30/2)-(12/2) = 734.

Basically you add half of the thickness of each the connected walls to get the outside length or subtract half of the thickness of each the connected walls to get the inside length.

Starting with the outside length you subtract half of the thickness of each of the connected walls to get the length value for the Modify walls dialog.

This is just the way Sweet Home 3D handles wall lengths, from the center of the wall. It's the only consistent length value from which you can calculate both the outside and the inside lengths.
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