Dec 18, 2025, 2:14:40 PM
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Sweet Home 3D Forum » List all forums » » Forum: Features use and tips » » » Thread: Dimensions - sizing accurately » » » » Post: Re: Dimensions - sizing accurately |
Print at Dec 18, 2025, 2:14:40 PM |
| Posted by ElfenM at Oct 24, 2015, 7:46:50 PM |
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Re: Dimensions - sizing accurately In American standards, using inches... In older (Pre-1980) Homes, when you bought and used a 4in X 4in joist, it was 4in X 4in. Now, it is in measured reality 3.5in X 3.5in. This is because some engineering idiot (for lack of a better word) on this end decided on some hallucinated realization, that dry & wall board on the USA are about .5in and nailing one of these boards to the joists gave you the 4in thickness the design calls for because 3.5in + .5in = 4in. Though this answered some problems with angle issues with connecting joists and wall, it also creates a weaker structure. Older homes tend to have oddities about them because the joists and wall connections are greater and stronger - one such issue is the foundation... If a foundation of (lets say) 20ft X 20ft is made, in the old house the joists are created to line up with the foundation perfectly, but the walls on the joists stuck out by how much their thickness is, which can be as much as 4 or more inches in some cases. This what is shown in okh's picture as I see it. But modern houses have their walls flush with the foundation and the joists moved in to accommodate the difference. It is all on where one starts to take their measurements and where they line things up. Just for fun, I created a couple of small Trailer (Cargo) Box homes, and their external dimensions are 8ft X 20ft (for a small shipping container). That does not mean that the space inside is 8ft X 20ft, as I soon realized. Its internal dimensions are something like 7ft 4in X 19ft X 4in, an 8in difference all around that makes each wall about 4in thick (I use insulated cargo boxes for my designs; non-insulated boxes have thinner walls). It's a lot of work to figure things out but I can bet that this is the problem. Like I said before, it depends on where one begins their measurements and where it end. Different techniques were used over time, so one has to be aware of which ones are used. Just my 2 cents on the matter. |
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