... tolerance: no more than 3mm 3)Market:America,Japan Laminated lumber (environmentally friendly)1) Grade: construction and packing; 2) Material ... test, environmental test. LVL material compared with the solid wood lumber, it has many the advantages:1) LVL materials logs ... quality, intensity, uniformity, material variability in small, solid wood is the best alternative to the structure of materials; 2 ...