Installation Guide

12
GENERAL INFORMATION
FOR TREX
®
SELECT™ DECKING PHYSICAL AND MECHANICAL
PROPERTIES, REFER TO WWW.TREX.COM FOR MORE DETAILS.
PHYSICAL AND MECHANICAL PROPERTIES FOR TREX TRANSCEND
®
AND TREX ENHANCE
®
Flame Spread (a)
Typical Trex
®
Values for Coefficient of Thermal Expansion/Contraction
(36" (91.4 cm) long samples)
ASTM E84
DESIGN VALUES
540 psi (3.72 Mpa)
540 psi (3.72 Mpa)
500 psi (3.45 Mpa)
360 psi (2.48 Mpa)
200,000 psi
(1378.95 Mpa)
100
TEST METHOD VALUES
163 lbs/in (1.12 Mpa)
558 lbs/in (3.85 Mpa)
Rating = No Decay
Rating = 9.6
ULTIMATE (TYPICAL) VALUES
836 psi ( 5.76 Mpa)
861 psi (5.94 Mpa)
1562 psi ( 10.77 Mpa)
559 psi ( 3.85 Mpa)
412,000 psi (2840.64 Mpa)
1.57 BTU-in/hr-ft @85°F (.0023 W/cm/°C)
Thermal
Moisture
Nail Withdrawal
Screw Withdrawal
Fungus Resistance (White & Brown Rot)
Termite Resistance (c)
Compression Parallel (d )(e)
Compression Perpendicular (d)(f)
Tensile Strength (d )
Shear Strength (d)
Modulus of Elasticity (d )
Thermal Conductivity
Width
Length
Typical Trex Values
for Long-Term Water
Immersion
(36"/91.4 cm long samples)
Width ~3%
ASTM D1761
ASTM D1761
ASTM D1413
AWPAE1-72
ASTM D198
ASTM D143
ASTM D198
ASTM D143
ASTM D4761
ASTM C177
35.2 x 10-6 to 42.7 x 10-6 (inch/inch/°F)
644 x 10-6 to 776 x 10-6 (length/length/°C)
16.1 x 10-6 to 19.2 x 10-6 (inch/inch/°F)
297 x 10-6 to 356 x 10-6 (length/length/°C)
Typical Trex Values
for Constant High Humidity
(6"/15.2 cm long samples)
~1%
PHYSICAL MECH CAL PROPERTIES
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. Follow Trex installation literature for proper
width-to-width and end-to-end gapping information.
(c) Material weight loss was 0%.
(d) Ultimate strength values are not meant for design analysis. Testing performed on a 1" x 5.5" (2.5 cm x 14 cm) cross section. Design values are for
temperatures up to 130°F (54°C).
(e) Compressive strength parallel to the length.
(f) Compressive strength perpendicular to length.