Window scantlings

Technical data

material		spruce
characteristics		three or four ply, glued from three or four 24 mm layers - cut edges in fixed lengths from 500 mm to 3 000 mm or finger jointed chunks in the length of 6 000 mm
dimensions		72/82/96 mm x 86 mm 72/82/96 mm x 115 mm 72/82/96 mm x 125 mm 72/82/96 mm x 145 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		layer A - radial timber layer B - semi-radial and semi-tangencial timber layer C - radial –semi-radial timber
finger-joints		in layers A and C is 300+ mm length allowed in center layer B is 200+mm length allowed
growth rings		maximum vertical distance 6 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


Three-ply window scantling		Cutting of scantling edges

Quality conditions
the product meets all requirements of German standard ŐNORM B – 3013 und STN 74 6101

Quality A

surface of layers A and bottom of layers C practically without defect sides of scantling - knots
allowed 1 piece per 1 m up to 6 mm and pitch canals up to 30 mm 3 pieces/1 m
distance of growth rings maximum 6 mm

Quality A1

vertical distance of growth rings max. 6 mm
in layers A and C is react wood allowed

Layer A

healthy knots up to 6 mm 1 pc/ m
pitch canal up to 30 mm 2 pieces/ m
black knots up to 5 mm 1 piece/ m

Layer B

healthy knots up to 10 mm
pitch canal up to 50 mm
black knots up to 5 mm
applies also for sides of layers A, C

Layer C

healthy knots up to 6 mm 2 pc/ m
pitch canal up to 30 mm 5 pc/ m
black knots up to 5 mm 3 pc/ m

Quality C

blue colored wood allowed, 250 mm +

Detail