Specifications

	Specifications of groove and tongue profiles

	Wood types	Spruce (nordic and local), Douglas-fir Mountain larch
	Qualities	nSi for purely functional buildings single-sided Si or both sides Si
	Wood thickness	80 ... 140 mm with 2 tongues 160 ... 240 mm with 3 tongues
	Width	any available wood width in the range 120 ... 720 mm
	Tongue length	15 mm
	Calculation dimension	Tongue dimension (or initial dimension at special request)
	Profile	straight or slanted cheeks without chamfer or chamfered (4 mm or 7 mm measured across)
	Tolerances	Thickness +/- 1 mm Width +/- 2 mm Length +/- 4 mm
	Shrinking and swelling dimensions per 1% change of timber moisture (must always be observed with large-surface constructions)	Radial 0.19% Tangential 0.36% Longitudinal 0,01%
	Additional options for ceiling elements	Rebate 20 x 40 mm at the upper side preinstalled Rampa inserts as installation aid