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Basic Physical and Mechanical Properties

Property

Unit

Requirement

Result

Dimensional Change Coefficient of linear expansion (thermal)

longitudinal

°c−1

< 2x10−5

2.92x10−5Footnote (1)

cross-sectional

°c−1

< 2x10−5

4.28x10−5Footnote (1)

Dimensional Change Coefficient of linear expansion (swelling)

oven-dry to vacuum pressure soak

%

< 0.5, by 80% of specimens

−0.08

Strength and Stiffness - Flexural rigidity (EI)

kN·mm2

> 300 000

350 000

Strength and Stiffness - Moment capacity (MR)

N·mm

> 190 000

218 000

Strength and Stiffness - Impact resistance (IZOD impact, notched)

J/m

> 53.4

22.4Footnote (2)

Creep, recovery and load duration

%

< 25 for creep

27Footnote (3)

Creep, recovery and load duration

%

> 75 for recovery

86

Creep, recovery and load duration

%

No failure in step 6

Passed

Strength and Stiffness After Aging Weathering

impact resistance

%

> 75 of non‑weathered value

101

Strength and Stiffness After Aging Accelerated aging

% retention flexural rigidity

%

> 50 of non-aged value

87

% retention moment capacity

%

> 50 of non-aged value

95

Screw withdrawal - redry condition

N

≥ 600

2026

Screw withdrawal - wet/redry condition

N

≥ 720

2032

Lateral screw strength - redry condition

parallel

N

> 700

1453

perpendicular

N

> 700

2369

Lateral screw strength - wet/redry condition

parallel

N

> 700

1454

perpendicular

N

> 700

1194

Flame-spread rating

No unit

≤ 200

85 60 (Cap)

Smoke developed classification

No unit

Report

380 310 (Cap)

Performance Under Both Concentrated Static Loads and Impact Loads

Property

Requirement

ResultFootnote (1)

Concentrated static load

decking at 50°C

minimum ultimate load (kN)

≥ 2.45

4.89

Concentrated static load

decking at 20°C

minimum ultimate load (kN)

≥ 2.45

4.56

Concentrated static load

decking at 50°C

maximum deflection under 0.89-kN load (mm)

≤ 2.0

1.59

Concentrated static load

decking at 20°C

maximum deflection under 0.89-kN load (mm)

≤ 2.0

1.21

Following impact load of 102 N·m

decking at 50°C

minimum ultimate load (kN)

≥ 1.78

1.78

decking at 50°C

maximum deflection under 0.89-kN load (mm)

≤ 2.0

1.58

Durability

Property

Requirement

Result

SPF Lumber

"Accuspan Deck Board"

Bending stiffness

Mean percentage loss in bending stiffness (EI) after ultraviolet (UV) exposure and accelerated aging must be less than or equal to spruce lumber

22.5%

9.6%
13.8% (Cap)

Bending strength

Mean percentage loss in moment capacity (MR) after UV exposure and accelerated aging must be less than or equal to spruce lumber

24.5%

15%
-0.7% (Cap)

Decay and Termite Resistance

Property

Requirement

Result

Decay resistance

Mean percentage loss in weight and compressive strength after exposure to decay-causing fungi must be equal to or better than preservative-treated wood conforming to CAN/CSA-O80.1-M97, "Preservative Treatment of All Timber Products by Pressure Processes"

Passed

Termite resistance

Rating must be equal to or better than preservative-treated wood conforming to CAN/CSA-O80.1

Passed

Performance Under Concentrated Static Load – Stair Tread

Property

Requirement

ResultFootnote (1)

Minimum Ultimate Load (kN)

Maximum Deflection Under 1 kN (mm)

Applied Ultimate Load (kN)

Deflection Under 1 kN (mm)

Concentrated load

stair tread

5Footnote (2)

0.75

5.75

1.07Footnote (4)

stair tread nosing

5Footnote (3)

7.5

Additional Performance DataFootnote (1)

Property

Slip Index Reference value

Result

Slip resistance

dry condition

≥ 0.5

0.57
0.36 longitudinal (Cap)
0.46 transverse (Cap)

wet condition

≥ 0.5

0.53
0.30 longitudinal (Cap)
0.39 Transverse (Cap)