GRP Technical Properties & Application

GRP (Glass Reinforced Polymer) cable support systems possess unique properties which enable them to resist many corrosive environments, particularly where conditions indicate that conventional materials may not provide an economic service life

Constructed from glass reinforced thermoset resins, GRP is designed and manufactured with a structural integrity normally only associated with steel, but without their corrosion, weight and electrical conductivity problems.

As GRP is non conductive, there is no concern of transmitting electricity into the support system from damaged cables. Additionally there is no requirement for special support conditions to prevent electrolytic corrosion. Non conductive and non magnetic features mean a safer support system

Technical properties in a nutshell

Mechanical Properties

Tensile Strength 20 - 30.6 kgf/mm²

Compression Strength 20 - 30.6 kgf/mm²

Flexural Strength 20 - 30.6 kgf/mm²

Shear Strength 6.1 kgf/ mm²

Density 1.7 – 1.9 g/ cm²

Impact Strength 60-90 kgfcm/ cm²

Thermal Properties

Thermal Conductivity 0.2 – 0.3 kcal (mhºC)

Oxygen Index 42%

Operating Temperature -140 to + 120ºC

Electrical Properties

Dielectric Strength 7–15kV/mm

Insulation Resistance 3.16 x 1014

Weather Resistance

Water Absorption 24h = 0.15% 4 days = 0.25%

Weight Increase After 500h = 0.7%