FINISHING
Filling of surface imperfections should be done before sanding.
Both faces of the plywood should be sanded with a minimum 120-grit paper.
Any filling done after sanding should be kept to a minimum & must be hand-sanded smooth once dry.
MOISTURE CONTENT
To prevent distortion during transit, storage & construction application it is vital that the moisture content of BPC plywood be managed in accordance with this Specification.
At the time of dispatch from production the moisture content of the plywood should be 13% +/- 2%.
It is required that all BPC plywood is “rested” for a minimum of 7-days between packaging & shipment.
DIMENSIONAL TOLERANCES
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Thickness of sanded sheets
3 – 7mm +/-5%
9 – 17mm +/-4%
19 – 25mm +/-3%
Length & width of sheets +/-1.5mm
Squareness of sheets
By measuring the two diagonals across the plywood face, the difference between the diagonals is no more
than:
2400mm sheets 4.0mm
2700mm sheets 5.0mm
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Straightness of edge
The maximum allowable deviation of any sheet edge from a straight line is 0.05% of the length of the edge
The following apply:
1200mm 0.60mm
2400mm 1.20mm
2700mm 1.35mm
Flatness of sheets
The maximum space from the underside of a sheet and a flat horizontal surface:
Thickness </= 7mm 50mm
Thickness > 7mm 30mm |
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