ce-marking of connectors and fasteners used in timber structures
DESCRIPTION
CE-marking of Connectors and Fasteners used in timber structures. Documentation according to ETAG 015 Three-dimensional nailing plates or Harmonized European Standards Gains and difficulties (challenges) by Jørn Ipsen, - PowerPoint PPT PresentationTRANSCRIPT
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CE-marking of Connectors and Fasteners used in timber structures
Documentation according to
• ETAG 015 Three-dimensional nailing plates
or
• Harmonized European Standards
• Gains and difficulties (challenges)
by Jørn Ipsen, Simpson Strong-Tie A/S. Denmark
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SIMPSON STRONG-TIEPARENT COMPANY
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Simpson Strong-Tie Europe
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Product range
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Europe. The present situation
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Europe.The present situation
• The Nordic countries have for many years had design codes very similar to the Eurocodes based on limit state design.
• A new German code for Timber Structures ( DIN 1052: 2004-08) similar to EC5 is now in force.
• The possibility to use Eurocodes together with National Annexes (NA) exists today.
But
Each country still have their own • Standards. (A lot of EN standards have been
implemented)• Building regulations• Building design codes• 5 countries: Sweden, Finland, Ireland, UK and
Portugal have not accepted the CE-mark as compulsory.
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CPD The Essential Requirements
• Mechanical Resistance and Stability• Safety in case of Fire• Hygiene, Health and the Environment• Safety in Use• Protection against Noise• Energy Economy and Heat Retention
The requirements do not refer to the construction products but to the construction works in which the products will be incorporated.
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CE - marking
Mandate from the European Commission
Harmonized Standard (hEN)
Guideline for European Technical Approval (ETAG)
Attestation of conformity
CE-marking
European Technical Approval (ETA)
Attestation of conformity
EOTA
The CE marking is not a quality mark; it demonstrates only that products meet the legal requirements necessary for them to be placed on the market by complying with the applicable technical specifications.
CEN
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Connectors and Fasteners
hEN: prEN 14545: Timber structures- Connectors-RequirementsEN 912: Timber fasteners – Specifications for connectors for timber (Nailing Plates, Straps and bulldog)
prEN 14592: Timber structures – Dowel-type fasteners – Requirements(Nails and screws)
ETAG 015: Guideline for 3-dimensional nailing plates
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CE – marking. ETA
CECE
European Technical ApprovalHarmonized Standard
prEN 14545 ETAG 015
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ETAG 015. The Guideline is the cookery bookwith the recipe for an ETA
Guideline
ETA
• Gives a recipe to meet the 6 essential requirements in the CPD
• Gives methods for testing
• Gives criteria’s for evaluation
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ETAG 015
Scope:This Guideline covers preformed three-dimensional metal nailing plates with specified fasteners for connections in load-bearing timber structures and for fixing timber structures or wood-based structural members to their support.The specified fasteners include nails, screws, bolts and dowels.
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ETAG 015
1: Mechanical resistance and stability
METHODS OF VERIFICATION1. Calculation according to EC52. Calculation assisted by testing3. Testing
GENERALManufacturer shall specify – Intended use:
1. Strength class or Species, grade and surface
2. Wane, allowed or not3. Support or restraint conditions4. Erection procedures5. Gaps
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ETAG 015
Calculation
Provided:Connector of a ductile material and:
• Joint has a ductile static behaviour and components have a ductile force-deformation curve
or
• Force distribution statically safe or conservative for joints with brittle failure, e.g. withdrawal of nails or screws
Characteristic material properties modified to relevant load durationRelevant when joint capacity depends on fastener + steel capacity
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ETAG 015
Calculations assisted by testing Scope:
To calibrate a theoretical static model against measured capacitiesfrom tests
Conditions:
• Model shall reflect the actual static behaviour
• Model shall be verified for * The type of forces and * The range of their positions * The range of eccentricities* Special consideration to axially loaded nails – nef
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ETAG 015
Testing
Testing procedure: EN 26891Density requirements: EN 28970
Density controls fastener capacity !
Two methods for selection of test specimens:• Method 1: Test data for direct calculation of Rk:
ρm ≤ 1,15 ρk ρof 20% ≤ ρk
• Method 2: Test data need to be modified for density before calculation of Rk: 1,05 ρk ≤ ρm ≤ 1,25 ρk
0,9 ρm ≤ ρ ≤ 1,1 ρm for each single timber member
According to EN 338 ρk typically in the range 290 to 350 kg/m3 (C14 – C24)
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ETAG 015
Durability
Thickness of zinc coating:
Requirements from Eurocode 5, clause 4.2
Service Class
1 2 3
Nails and screws d ≤ 4 mm
None Fe/Zn 12c Fe/Zn 25c
Steel plates t ≤ 3 mm Fe/Zn 12c Fe/Zn 12c Stainless
Steel plates 3 < t ≤ 5 mm None Fe/Zn 12c Fe/Zn 25c
Steel plates 5 < t None None Fe/Zn 25c
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European Technical Approval (ETA)
• An ETA is made for a specific product to a specific manufacturer
• An ETA is based on test of the product and an assessment of the test results compared to the intended use
• The ETA describes the specific requirements to attestation of conformity based on the Factory Production Control System at the specific manufacturer
• An ETA is the harmonized technical specification according to the CPD
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ETA-06/0106
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Content of the ETA
• Legal basis and general and special conditions
• Definition of the product
• Intended use
• Wood members
• EC5 design or similar national code design
• Service classes
• Other materials than wood
• Assumed working life
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Content of the ETA Mechanical resistance and stability
• Safety principles and partial factors
• Load-carrying capacities
• Methods of verification: Calculation, calculation assisted by testing or testing
• Fasteners – nails, screws, bolts
• Corrosion protection/service classes
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Content of the ETA Attestation of Conformity
System 2+
• Factory Production Control System (manufacturer)
• Initial type testing (manufacturer)
• 3th part control (notified body)
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Declaration of conformity, angle brackets
States conformity to:
•ETA-06/0106 Angle Brackets.
•Factory Production Control(FPC)
Certificate no 06/F007.
•ETAG 015 Three – dimensional
Nailing Plates
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Characteristic load-carrying capacity
Design basis – general
• Combined forces, splitting, density correction
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Characteristic load-carrying capacity
• Force directions - assumptions
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Characteristic load-carrying capacity
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Connectors and Fasteners
hEN: prEN 14545: Timber structures- Connectors-RequirementsEN 912: Timber fasteners – Specifications for connectors for timber (Nailing Plates, Straps and bulldog)
prEN 14592: Timber structures – Dowel-type fasteners – Requirements(Nails and screws)
ETAG 015: Guideline for 3-dimensional nailing plates
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prEN 14545: Connectors
EN 912: Timber fasteners –
Specifications for connectors for timber
Type A: Split ring connectors
Type B: Shear plate connectors
Type C: Toothed plate connectors – Bulldog, Geka
Type D: Other connectors
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prEN 14545: Connectors
Nailing plates and straps
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prEN 14592: Dowel-type Fasteners
• Nails
• Screws
• Staples
• Dowels
• Bolts
For use in timber structures
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Products included in prEN 14545 and prEN14592
• Meet the requirements in the standard.
• Attestation of conformity:
System 2+ for connectors
and 3 for fasteners.
• Calculate according to Eurocode 5
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CE-marking. Difficulties (challenges)
• Big costs. Initial and also continuously.
• CE-marking not compulsory.
• Queue at the approval bodies.
• Too long “co-existence” period for the total system.
• ETAs on same level Ex. 1: Valid only in one country Ex. 2: Number of force directions
• Further requirements
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CE-marking. Gains
• Passport to all European
countries.
• Design load - carrying
capacities for all European
countries based on the
same approval.
• Improved documentation
and product development.
• Improved internal technical
communication.
• More confidence in the market