Wood type: composite material glued together from intersecting layers of wood (deciduous - alder, birch, coniferous - spruce) in which the fibers of adjacent layers run at right angles
Welds joining layers in plywood are resistant to water
Water-resistant glue based on phenol-formaldehyde resin
Humidity 4-10 [%]
The edges of the tops are made of semi-closed profile C which is galvanized