Wooden subframes

made from dry fir wood, lime or pine-tree

batten thickness
21x41 mm DP/21/41          
  32x41 mm DP/32/41 (multi-layered)
  30x64 mm DP/30/64 (multi-layered)
  41x64 mm DP/41/64 (multi-layered)
  45x64 mm DP/45/64 (multi-layered)

standard lengths; 27,30,33,35,38,41,50,55,60,65,70,73,81,

85,90,100,116,120,130,140,150...  
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