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Cuie


Gama completa de cuie cu agrement ce vin insotite de certificate de calitate TUV, asigurand astfel maximul de calitate si rezistenta.
Geometria precisă a cuiului permite deplasarea lui în direcţia dorită, fără a  fisura materialul străpuns, sau a rupe structura lemnoasă.

 


Corrosion protection

ITW Industry provide a very wide range of fasteners for exposure to a variety of environments and  meet the requirements of National, European and International building codes, particularly Eurocode 5.

Eurocode 5 sets minimum requirements for corrosion protection, which apply across Europe according to three Service Classes. These are primarily concerned with the moisture content of timber. It is essential to consider also the variations in environmental factors across Europe and more locally, particularly the differences between urban and rural locations, proximity to the sea and other aggressive atmospheres.

Here we identify the anticipated life of each protective coating we offer, using the breakdown in ISO12944 Part 2 regarding the rate of corrosion experienced in these locations:

Environmental classification
C1-Typical conditions(temperate climate)Inside heated or air-conditioned buildings with cleanatmosphere, low relative humidity and no likelihoodof damp or condensation.
C2-Internal occasional damp or wet conditions,unheated buildings where condensation may occur.External environment with low level of pollution anddry climate, mostly rural areas, sheltered conditions.
C3-Urban and industrial environments, moderate sulphurdioxide pollution.Coastal areas with low salinity.
C4-Industrial areas with high sulphur dioxide and coastalareas with moderate salinity.
C5-Industrial areas with high humidity and aggressiveatmospheres. Coastal areas with high salinity

The following colour code used in this catalogue and on our product labels provides a quick, high visibility check that the appropriate finish is being used:
Bright steel = no corrosion protectionMeets Eurocode 5 Service Class 1 requirments for dry internallocations, nails only.
Electro galvanised 5 µm = Meets Eurocode 5 Service Class 1 requirements, for nails only.Typical life in C2 environmental class is 7 years or 2.5 years in C3.
Electro galvanised 12 µm = Meets Eurocode 5 Service Class 2 requirements for nails and staples. This is the minimum protection for staples, even in Service Class 1. Typical life in C2 environmental class is 17 years or 6 years in C3.
TMGalv-Plus (ITW proprietary system) = Galv-Plus is a zinc-aluminium alloy which gives a 70% bettercorrosion protection than a pure zinc coating. A 15 m coating isapplied to the wire before the fastener is formed. SurpassesEurocode 5 Service Class 2 requirements. Typical life in C2environment class is 28 years or 10 years in C3.
Hot dipped galvanised = Fasteners are dipped in a bath of molten zinc to achieve a minimumcoating of 55 m. Meets Eurocode 5 Service Class 3 requirements.Typical life in C2 environmental class is 70 years or 25 years in C3.
Stainless steel A2-304 = Meets Eurocode 5 Service Class 3 requirements. Will provide over 50 years life in C3 environment. Superficial discolouration can occur. To avoid this select A4-316.
Stainless steel A4-316 = Meets Eurocode 5 Service Class 3 requirements. Suitable for C4  and C5 environmental classes. Will not discolour.
It is also necessary to consider wood treatments and wood species as these can react with different coatings. For instance, it is always recommended to use stainless steel fasteners to attach Western Red Cedar and Douglas Fir cladding.


This information is given as a general guide. Our product specifications are subject to regular modification and improvement. Fastener selection must be made by a design engineer with a full knowledge of local conditions. Please contact us for more detailed information or advice.

Eurocode 5 & CE marking

Eurocode 5 (EN 1995-1-1:2004 Design of timber structures) is gradually being phased in, making significant changes to the way that calculations are made and components chosen. In some cases this will significantly change design decisions. ITW Industry supply fasteners that meet the requirements of the new rules, supported by datasheets and software to help in the choice of the most appropriate solution. These can be downloaded from our website.

Eurocode 5 is one of ten Eurocodes aimed at harmonising the standards for all construction products across Europe, simplifying the choice between competing products and opening up the market, encouraging the spread of knowledge and best practice. It also sets minimum acceptable performance criteria.

The objective of Eurocode 5 is that all construction products will be CE marked to show that they are safe and fit for purpose in terms of;-ŸMechanical resistance and stability ŸSafety in case of fireŸHygiene, health and the environmentŸSafety in useŸProtection against noiseŸEnergy economy and heat retentionThe CE mark will supercede national standards.

Eurocode 5 is essentially an ongoing process which will be implemented as the component European standards and ETAGs (European Technical Approval Guidelines) are agreed. Several standards or ETAGs affect fasteners for timber construction, including;-ŸEN14592 Dowel Type Fasteners (nails, staples, screws)ŸEN14566 Gypsum Fasteners ŸEN14545 2D nailing plates ŸETAG 015 3D connectorsŸETAG 011 Light composite wood based beams and columnsŸETAG 007 Timber frame building kitsŸETAG 001 Metal anchors for use in concrete (where fixing sole plates or wall plates to masonry structures.

The detail of these is all subsidiary to the calculation and performance criteria of Eurocode 5 and the permitted variations of the National Annex. In particular 3 Service Classes cover the variety of conditions to which building components are exposed;
Service Class 1 = Internal fixings and fasteners, protected from cold and damp. Ÿ
Service Class 2 = Fixing of sheathing, battens etc…  which are outside the thermal insulation, but not directly exposed to weatherŸService
Class 3 = Exposed directly to weather.

These service classes essentially deal with the moisture contained within the timber and additional consideration needs to be made of the local environment (see page 10). It is fundamental to Eurocode 5 that the minimum design life of most buildings is 50 years and this should always be born in mind by the engineer.

EN14592 concerns fasteners not covered by more specific approvals (e.g. fasteners for non-structural plasterboard or fasteners for attaching 3D connectors). The applications it relates to include timber frames and sheathing, external cladding, roof construction. It stipulates the requirements for factory production control and for the independent testing of characteristic strength values for withdrawal, head pull through and yield moment.


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