Content page

From [Institution name]

Table 1.1. General Performance Requirements per CAN/CGSB-11.3-M87
Property	Unit	Requirement
Dimensional tolerance (length and width)	mm	0 to −3.2
Thickness	mm	See Table 3 for thickness requirements
Squareness	mm/m	Corners must not deviate by more than 1.3 from the right angle.
Physical properties	–	See Table 3
Impact resistance	mm	Minimum 350 ^{Footnote (1)}
Hardness	N	Minimum 2 600
Nail pull resistance	N	Minimum 750 ^{Footnote (2)}
Lateral nail resistance	N	Minimum 750 ^{Footnote (3)})

Table 1.2. General Performance Requirements per CAN/CGSB-11.3-M87 - Accelerated Aging (After 6 Cycles)
Property	Unit	Requirement
Residual modulus of rupture (MOR)	%	Minimum 50 ^{Footnote (4)}
Permanent swell	%	Maximum 15 ^{Footnote (4)}
Appearance	–	No serious surface or edge failure (i.e., no delamination and no disintegration)

Notes to Tables 1.1. and 1.2.:

Footnote 1

Initial drop of 350 mm.

Return to footnote 1 referrer

Footnote 2

The specimen sizes must be 75 mm × 150 mm. Three galvanized box nails (2.87 mm in wire diameter and 6.75 mm in head diameter) must be driven into the board at intervals of not less than 25 mm. The holding fixture must consist of a plate with a centered opening, 40 mm in diameter, with a testing speed of 3 mm/min to 4 mm/min.

Return to footnote 2 referrer

Footnote 3

The nails must be 3.28 mm in wire diameter and 7.14 mm in head diameter, and must be driven into the specimen 9.5 mm from the edge, so that one-half of the nail is exposed on the other side of the specimen. The load must be applied perpendicular to the long axis of the nail at a constant speed of 3 mm/min to 4 mm/min until failure occurs. Because galvanized nails may bend in this test, a steel carding pin or a steel drill rod of approximately the same diameter may be used.

Return to footnote 3 referrer

Footnote 4

The MOR must be calculated based on the original board thickness. The swell must be based on the difference in thickness before and after the cycling procedure.

Return to footnote 4 referrer

Table 2. Physical Properties for Type 5 per CAN/CGSB-11.3-M87
Property	Unit	Requirement
Nominal thickness	mm	9.0	10.5	12.7
Minimum thickness	mm	8.3	9.5	11.4
Maximum thickness	mm	9.7	11.2	13.3
Minimum MOR	MPa	13	13	13
Minimum tensile strength parallel to surface	MPa	7.0	7.0	7.0
Minimum tensile strength perpendicular to surface	MPa	0.17	0.17	0.17
Maximum water resistance (after 24 h) - water absorption	%	20	20	20
Maximum water resistance (after 24 h) - thickness swell	%	8	8	8
Minimum density	kg/m ³	600	600	600
Maximum linear expansion (at 50%–90% relative humidity (RH)	%	0.30	0.30	0.30

Language selection

Search

Content page