Technical Information
Physical and Mechanical Properties
Abrasion Resistance |
ASTM D2394 |
.01 wear/1000 revs. |
Hardness |
ASTM D143 |
1124 lbs. |
Self Ignition Temperature |
ASTM D1929 |
743°F |
Flash Ignition Temperature |
ASTM D1929 |
698°F |
Flame Spread (a)
[Fire Defense®]
{Escapes®} |
ASTM E84 |
80 [40] {10} |
Water Absorption (sanded surface)
24 hr. immersion |
ASTM D1037 |
4.3% |
Water Absorption (unsanded surface)
24 hr. immersion |
ASTM D1037 |
1.7% |
|
Expansion/Contraction Properties (b)
Thermal |
Typical Trex Wood Polymer® lumber values for
Coefficient of Thermal Expansion/Contraction (36" long samples)
Width: 35.2 x 10-6 to 42.7 x 10-6 (inch/inch/°F)
Length: 16.1 x 10-6 to 19.2 x 10-6 (inch/inch/°F)
|
 |
Moisture: |
Typical Trex Wood Polymer lumber values for
|
|
Long Term Water Immersion
36" long samples:
Width ~3%
|
Constant High Humidity
6" long samples:
Width ~1%
|
|
Nail Withdrawal (c) |
ASTM D1761 |
163 lbs/in |
Screw Withdrawal (c) |
ASTM D1761 |
558 lbs/in |
Static Coefficient of Friction – Dry (d) |
ASTM F1679 |
0.59/0.70 |
Static Coefficient of Friction – Wet (d) |
ASTM F1679 |
0.70/0.75 |
Fungus Resistance (White & Brown Rot) |
ASTM D1413 |
rating = No Decay |
Termite Resistance (e) |
AWPAE1-72 |
rating = 9.6 |
Specific Gravity (typical) |
ASTM D2395 |
0.91 to 0.95 |
| |
|
Ultimate (typical) Values |
Design Values |
Compression Parallel (f)(g) |
ASTM D198 |
1806 psi |
550 psi |
Compression Perpendicular (f)(h) |
ASTM D143 |
1944 psi |
625 psi |
Tensile Strength (f) |
ASTM D198 |
854 psi |
250 psi |
Shear Strength (f) |
ASTM D143 |
561 psi |
200 psi |
Modulus of Rupture (f) |
ASTM D4761 |
1423 psi |
250 psi |
Modulus of Elasticity (f) |
ASTM D4761 |
175,000 psi |
100,000 psi |
Thermal Conductivity |
ASTM C177 |
1.57 BTU-in/hr-ft @85°F |
Leachate (i) |
TCLP-EPA 1311 |
pass |
Notes:
(a) Corresponding Smoke Developed Index is 285.
(b) Values shown are for reference only. These values should not be used to calculate gapping for Trex Wood-Polymer lumber. Follow Trex Wood-Polymer lumber installation literature for proper width-to-width and end to end gapping information.
(c) 8d common wire nail. No. 10 wood screw.
(d) ASTM F1679 test conducted on sanded/unsanded weathered samples with neolite surface.
(e) Material weight loss was 0%.
(f) Ultimate strength values are not meant for design analysis. Testing performed on a 2x6 cross section. Design values are for temperatures up to 130°F.
(g) Compressive strength parallel to the length.
(h) Compressive strength perpendicular to length.
(i) Leaching was below levels established by EPA for all constituent categories.
|