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EN 13706

European standard EN 13706 for pultruded profiles

European Standard EN 13706 applies solely to pultruded profiles for “structural purposes”, which according to the standard are defined as “where the load-bearing characteristic is the major criterion of design and where the product is part of a load-bearing system”.

The standard specifies the minimum requirements for the quality, tolerances, strength, stiffness and surface of structural profiles.

The standard basically divides pultruded structural profiles into two classes:

E23 – having the most stringent requirements to quality
E17 – having more lenient requirements to quality

Fiberline structural profiles meet or exceed the requirements of class E23.

The standard broadly consists of three parts:

EN 13706-1: Specifying the designation/labelling/marking of structural profiles with regard to selection of materials, selection of reinforcement, surface treatment, etc.

EN 13706-2: Indicating testing methods and tolerances for pultruded structural profiles. Guidelines for quality and quality assurance are also given.

EN 13706-3: Indicating minimum values for the technical properties of structural profiles in relation to the standard’s two classes.

Characteristic properties      Minimum requirements  
Properties Unit Test method  E23 E17
Modulus of eleasticity GPa Annex D,
EN 13706-2:2002
23 17

Tensile modulus - longitudinal

GPa EN ISO 527-4 23 17

Tensile modulus - transverse

GPa EN ISO 527-4 7 5

Tensile strength - longitudinal

MPa EN ISO 527-4 240 170

Tensile strength - transverse*

MPa EN ISO 527-4 50 30

Pin-bearing strength - longitudinal

MPa Annex E,
EN 13706-2:2002
150 90

Pin-bearing strength - transverse

MPa Annex E,
EN 13706-2:2002
 70 50 

Bending strength - longitudinal

MPa EN ISO 14125 240 170

Bending strength - transverse

MPa EN ISO 14125 100 70
Shear strength - longitudinal MPa  EN ISO 14130 25 15

*The grey profiles meet class E23 in all respects, apart from the cross strength that amounts to 35 MPa due to extra flame retardants.

Work is in progress to expand the standard to include guidelines for the chemical durability and fire-technical properties of structural profiles.

Combining advantages

CE marking

Our products have a number of international and highly sought-after certifications, among other, within the construction, offshore and railway sectors. This is your guarantee of consistently high quality every time you buy from us and use our products.

Low weight

Fiberline's GRP profiles are low in weight. This makes them easier to work with and means that great weight savings can be achieved on the finished structure.

Great strength

Fiberline Building Profiles give you the same great strength as steel, but at only a quarter of the density. It is also possible to make weight savings in comparison with aluminium, as the density is 30 % lower.


Our fibreglass profiles are resistant to aggressive chemicals, and liquids. This makes them ideal for wastewater treatment plants, swimming pools, cooling towers and construction, where there is a risk of corrosion.

Chemical resistance

Our fibreglass profiles are resistant to aggressive chemicals, liquids and alkalis. This makes them ideal for wastewater treatment plants, swimming pools, cooling towers and construction, where there is a risk of corrosion.

Electrical insulation

Fiberline's GRP profiles provide electrical insulation and minimise the complexity of earthing. This makes our profiles a future-proof choice where the costs of both installation and future inspections can be reduced considerably.

Easy to work with

GRP profiles are just as easy and fast to work with as timber. This means that solutions which incorporate our profiles can be installed easily on site or adjusted to fit existing components, such as piping systems, etc.

Thermally Insulating

Fiberline's fibreglass profiles have a significantly lower heat distribution gradient than steel and aluminium, enabling energy-efficient end products.

Minimal maintenance

Our GRP profiles have unrivalled durability and a long life, even in demanding conditions.


Fiberline's fibreglass profiles are produced using an energy-optimised process that takes the environment into consideration.

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