7.3.7 Length of the installation
7.3.8 Depth inside ground
7.3.9 Depth inside water
7.3.10 Exposed length above water.
7.3.11 Do you know of any problems with this installation, for example
Excessive deformation/flexure
cracks
Interlock failure
Any other
8. Life Cycle
8.1
What is the expected life cycle of your product under normal use.
Plastics Industry product life expectancy of 50+ years.
8.2
Have you performed any test to establish this life cycle.
Millions of square feet of product in use in excess of 10+ years.
8.3
Do you have any data to establish this life cycle without test.
Millions of square feet of product in use in excess of 10+ years.
9. Degradation of properties over time:
9.1
Strengths:
Have you established any change with time in compressive strength, tensile strength and
shear strength of the material constituting your vinyl sheet pile products by exposure to
out door conditions (sunlight). If so, what is the rate of change?
Physical properties of Flexural Strength, Flexural Modulus, Tensile Strength, and Tensile
Modulus remain relatively constant over time. Long-term outdoor weathering studies show
60 percent impact retention in high UV climates.
9.2
Elastic modulus:
The value of elastic modulus controls the stiffness or deflection of the installed sheet
piles. Have you established any change with time of the elastic modulus of the material
constituting your vinyl sheet pile products by exposure to out door conditions (sunlight).
If so, what is the rate of change?
Physical properties of Flexural Strength, Flexural Modulus, Tensile Strength, and Tensile
Modulus remain relatively constant over time.
9.3
Creep:
Thermoplastic polymers are known to creep under a sustained stress. Have you
established the creep rate for the final polymer mix that constitutes the material of your
vinyl sheet pile products? If so, what it is.
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