Explanation: In the US, a two-by-four is a standard lumber size used mainly in the construction of houses. They are referred to as studs (Kantholz). But it is not actually 2 inches by 4 inches. That's the "nominal size". The actual size is 1 1/2 inch by 3 1/2 inches. A rail is the horizontal member of a structure - as opposed to the stile - the vertical piece.
tongue-and-groove cedar dadoed into top and bottom 2 x 4 rails.
gespundetes Zedernholz verbunden durch Quernut mit schweren Querstücken?
The same product, this time with no inch symbols at all:
"Corners are rounded with vertical tongue-and-groove 1x4s dadoed into top and bottom 2x4 rails."
http://www.viking-leisure.co.uk/pages/spa/about.htm
Try http://www.arcticspas-uk.com/structure.html
"Corners are rounded with vertical tongue-and-groove 1" x 4" dadoed into top and bottom 2 x 4 rails" - looksto me as though they mean 2" x 4".
08:40 Apr 12, 2006
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Answers
43 mins confidence:
eingefräste Balken von 5 x 10 cm
Explanation: to get you started
also look at the ref. where they speak of 'gefräste Nuten'
Explanation: In the US, a two-by-four is a standard lumber size used mainly in the construction of houses. They are referred to as studs (Kantholz). But it is not actually 2 inches by 4 inches. That's the "nominal size". The actual size is 1 1/2 inch by 3 1/2 inches. A rail is the horizontal member of a structure - as opposed to the stile - the vertical piece.
tongue-and-groove cedar dadoed into top and bottom 2 x 4 rails.
gespundetes Zedernholz verbunden durch Quernut mit schweren Querstücken?
The translation workplace 
