BSH beams - Quality

	Quality of choice¹	NSi - industrial quality (non visible)	Si good-looking quality	ASi exclusive quality
1	Hard enclosed knot^2,3	acceptable	acceptable	acceptable
2	Fallen out and loose knots^2,3	acceptable	ø ≤ 20 mm jsou acceptable⁴ ø > 20 mm is necessary to replace in production⁴	repaired
3	Ruin pocket^3,5	acceptable	acceptable to 5 mm	acceptable to 3 mm
4	Knots and defective places repaired³	is not necessary	acceptable	acceptable
5	Knot or ruin pocket repaired with filling materials³	is not necessary	acceptable⁶	acceptable⁶
6	Insect attack	acceptable tunnel to 2 mm	acceptable holes to 2 mm	unacceptable
7	Pith	acceptable	acceptable	on visible surface evident of lamellas layers are not acceptable
8	Width of dried cracks^3,5,7	no limitation	acceptable to 4 mm	acceptable to 3 mm
9	Change of discoloration in the impact of blue stain hard red stain and brown rot in lines⁵	no limitation	until 10% of visible surface of all construction pieces	unacceptable
10	Mould⁵	unacceptable	unacceptable	unacceptable
11	Pollution⁵	acceptable	unacceptable	unacceptable
12	Distance of wedge-shaped pivots	no limitation	no limitation	on visible surface of lamellas must be the distance minimally 1 m
13	Surface quality	equalizes	planed andmoulded, cut from planning are permitted to depth 1 mm	planed and moulded, cut from planning are permitted to depth 0,5 mm

¹ - divergence of boundary value in lines 2, 3, 6 - 9, 12, 13 is possible to accept as follows
: in case of quality Si are 3 divergences/m² of the surface
: in case of quality ASi is 1 divergences/m² of the surface

² - acceptable size of knotsaccording to DIN 4074

³ - no limitation of quantity

⁴ - mentioning of diameter of knots correspond mentioning of diameter each knot at cut timber according to DIN 4074 - 1 : 2008 - 12, 5 .1 .2.1.

⁶ - on request - possibility of repainting with paste

⁷ - just as cracks might be at all timber products even at this cracks might be

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