Grade I wood quality requirements
Shanghai Juye wood preservative wood quality standards:
1, not allowed to decay;
2, not allowed to die, missing section, live less than or equal to 15mm;
5, bend the curvature of not more than 1%, horizontal bend is not allowed;
6, tolerance: -2mm
3, the end of the flat, surrounded by a saw, planing;
4, not allowed to break;
