UNCOATED DOWNSTREAM PRODUCTS MADE OF BASIC PLYWOOD
Examples of downstream products made of basic plywood meant for construction are:
- 9 m wall board
- 18 mm all-round tongued and grooved subfloor board
- 15 mm board tongued and grooved on the long sides meant as a roofing substructure
Wall board (board size 1,200 x 2,750 mm, nominal thickness 9 mm) is non-tongued and grooved and meant as a base plate to increase the strength and rigidity of boarding on internal walls, and in so-called double-plated walls, where other interior lining material is used as inner lining on top of plywood. The dimensions of the board are suitable for the most common 400 mm and 600 mm frame column spacings.
Subfloor board (board size 2,400 x 1,200 mm installed on tongues and grooves, nominal thickness 18 mm) is all-round tongued and grooved, and meant as a load-bearing structural board for floors that are supported on a podium. Its thickness and dimensions are suitable for 400 mm and 600 mm beam spacings.
Roof substructure board (board size 2,700 x 1,200 mm, nominal thickness 15 mm) has a special structure, is tongued and grooved on its long sides and especially meant as a load-bearing substructure for felt- and sheet-metal roofs when the distance between the roof supports is 900 mm. Compared to traditional rough tongue and groove boarding, plywood boarding can achieve significant savings in total working hours and an even and structurally rigid substructure. The board can also be used as a load-bearing substructure in floors. The boards are mainly for protection against moisture during construction.
With regard to other uncoated downstream products made of basic plywood, grooved and semi-tongued and grooved interior board (board size 2,500 x 1,210 or 610 mm, thicknesses 7.5 and 10 mm) should also be mentioned. This is meant for the lining and semi-panelling of interior walls and ceilings, and is used in the manner of interior lining boards. Interior boards are made of conifer plywood with a spruce veneer surface, and their visible surface is grooved at longitudinal 75 mm intervals with W-shaped grooves. The long sides are semi-tongued and grooved.