NEN EN 14080 : 2013

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
  4.1 Performance requirements
  4.2 Strength and stiffness properties of glued
      laminated timber
      4.2.1 General
      4.2.2 Verification from tests with glued laminated timber
      4.2.3 Verification from calculations and documented
             properties of the laminations
      4.2.4 Classification from lamination properties
  4.3 Bonding strength of large finger joints
  4.4 Durability against biological attack
      4.4.1 Natural durability
      4.4.2 Glued laminated timber treated against
             biological attack
  4.5 Bonding strength of end joints and glue lines
      4.5.1 General
      4.5.2 End joints in the laminations
      4.5.3 Glue lines
  4.6 Reaction to fire
  4.7 Formaldehyde emission
5 Evaluation of conformity
  5.1 General
  5.2 Initial type testing or assessment
  5.3 Factory production control
6 Marking and labelling
Annex A (normative) Determination of 5-percentile
                    characteristic values from test
                    results and acceptance criteria for
                    a sample
  A.1 Scope
  A.2 Determination of the lower 5-percentile
      characteristic value
      A.2.1 General
      A.2.2 Method
  A.3 Acceptance criteria for a sample
      A.3.1 Requirements
      A.3.2 Method
Annex B (normative) Formaldehyde classes
  B.1 General
  B.2 Initial classification and factory production control
  B.3 Requirements for the formaldehyde classes
Annex C (normative) Tests and requirements for
                    one-component moisture curing PU
                    adhesives for the production of glued
                    laminated timber with glue line thickness
                    not greater than 0,5 mm
  C.1 General
  C.2 Short and medium term strength tests and requirements
      C.2.1 Tests for the determination of bond strength in
             longitudinal tensile shear
      C.2.2 Tests for the determination of resistance
             to delamination
      C.2.3 Tests for the determination of the effect of
             acid damage to wood fibres by temperature
             and humidity cycling on the transverse tensile
             strength
      C.2.4 Tests for the determination of the effect of
             wood shrinkage on the shear strength
      C.2.5 Tensile shear strength at low and high temperatures
  C.3 Long-term sustained load test at cyclic climate
      conditions with specimens loaded perpendicular to the
      glue line
      C.3.1 General description
      C.3.2 Manufacture of specimens
      C.3.3 Test procedure and climate conditions
      C.3.4 Requirements
  C.4 Long-term sustained load test at different climate
      conditions with specimens loaded in shear parallel
      to the glue line
      C.4.1 Specimens
      C.4.2 Test procedures
      C.4.3 Evaluation and requirements
  C.5 Creep test at cyclic climate conditions with
      specimens loaded in bending shear
      C.5.1 General
      C.5.2 Specimen build-up and manufacture
      C.5.3 Test set-up and test procedure
      C.5.4 Requirements
  C.6 Application of the adhesive in the production of
      glued laminated timber
Annex D (normative) Determination of properties of use
                       of the adhesive
  D.1 Determination of the conventional assembly time
  D.2 Determination of the conventional pressing time
  D.3 Determination of the initial dynamic viscosity
  D.4 Tests on influence of open and closed assembly
      times on shear strength
Annex E (normative) Reaction to fire: Euroclass without
                       the need for further testing
Annex ZA (informative) Clauses of this European Standard
                       addressing the provisions of the EU
                       Construction Products Directive
  Z.1 Scope and relevant characteristics
  Z.2 Procedure for the attestation of conformity
      Z.2.1 System of attestation of conformity
  E.1 bending strength;
  E.2 compressive strength;
  E.3 tensile strength;
  E.4 shear strength;
  E.5 bonding strength of the laminate end joints,
      glue lines and large finger joints;
  E.6 durability of the wood;
  E.7 formaldehyde class
      Z.2.2 Specific tasks of the notified body
      Z.2.3 Certificate and Declaration of Conformity
  Z.3 CE Marking

Describes the performance requirements of the following glued laminated products: - Glued laminated timber (glulam); - Glued solid timber; - Glulam with large finger joints; & - Block glued glulam for use in buildings and bridges.