Laminated friezes

Laminated entrance door friezes

Technical data

material   spruce
dimensions   82 mm x 115/125/145 mm, 96mm x 115/125/145 mm length from 800 mm to 3000 mm
humidity   12 % +2, -3 %
maximum difference in the humidity of layers 3%
gluing   PVAc  glue D – 4 according to DIN EN 204 (STN EN 204)
texture   outer layer - radial/semi-radial timber
middle layer – semi-radial and semi-tangencial timber
finger-joints   in outer layer 250+ mm length allowed
in center layer is 250+mm length allowed
growth rings   maximum vertical distance 7 mm widths ratio of growth rings in finger-jointed layers is a maximum of 1:1,5
( does not apply for layer B)
glued joints   unglued joints are not allowed
glued gap allowed up to 0,1 mm
strength of finger-joint - 75 % of fold in the wood
Quality conditions  

Middle layer

  • healthy knots up to 20 mm
  • pitch canal up to 50 mm
  • black knots up to 10 mm

Outer Layer

  • without knots
  • pitch canal up to 30 mm 1pc/m
  • black knots up to 4 mm 1pc/m

Fix layer

  • without knots
  • pitch canal up to 30 mm 1 pc/ m
  • without black knots
Detail