Contracting spruces

We contract AB quality timber, cut according to our specification:
Knot size: Edge: Max. 2/3 of the thickness.
Group of knots max. ½ of thickness or max. ½ of the time. Width: Max. 1/3 of the wide time, max. 60 mm.
The whole width of the ridge is not allowed from the head.
Maximum distance between growth rings 5 mm.
We do not recognize the rot, the blue, the internal cracks, the wood with deviated fiber, the determination of the causes of insects or mechanical damage or no recesses are allowed.
dimensions:
Cutting: 47 x 105/135/155/177/210 mm
Billing: 45 x 100/130/150/170/200 mm