ISO 12578:2016 PDF

Timber structures — Glued laminated timber — Component performance requirements

Open preview (PDF)

Title (English):

ISO 12578:2016

Timber structures — Glued laminated timber — Component performance requirements

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 14
Publication date:: April 12, 2016
Edition:: ISO IS 12578 edition 2 version 1
ICS:: 91.080.20

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

ISO 12578:2016 specifies requirements for the components of glued laminated timber members for structural use. ISO 12578:2016 is applicable to products with a finished lamination thickness of not more than 50 mm. Although most glued laminated timber is made from coniferous species, this International Standard also applies to broad leaf species if the tests specified in this International Standard show that a satisfactory glue bond can be achieved. The basic requirements apply to structural members of all service classes; however, special precautions are necessary for service class 3, for example, the use of weather resistant adhesives (see 5.3). ISO 12578:2016 does not apply to the determination of strength and stiffness characteristics. Annex B contains informative materials for formaldehyde emission.

Technical details

Technical committee: ISO/TC 165 - Timber structures
SKU: ISO 12578:2016

Abstract

Overview

ISO 12578:2016 - Timber structures - Glued laminated timber - Component performance requirements defines minimum component and production requirements for glued laminated timber (glulam) intended for structural use. The standard applies to laminations with a finished thickness of not more than 50 mm, and covers timber species (coniferous and broad leaf where valid bonding can be demonstrated). It focuses on component performance (timber, adhesives, end joints, glue-line integrity) and quality control rather than on overall strength and stiffness determination.

Key topics and technical requirements

Scope limits
- Applicable to laminations ≤ 50 mm thickness.
- Applies across service classes 1–3, with special precautions for service class 3 (e.g., weather-resistant adhesives).
- Does not determine overall strength/stiffness characteristics (see ISO 8375 for those tests).
Timber grading and laminations
- Laminations must be graded per ISO 9709 (visual) or ISO 13912 (machine grading).
- Laminations and end joints must produce reliable strength/stiffness properties.
Adhesives and bonding
- Adhesives chosen must ensure durable bonds for the intended service life and conditions (climate, moisture, temperature, timber species, preservatives).
- Adhesives shall meet ISO 20152-1 requirements.
- For service class 3, weather-resistant adhesives and appropriate production controls are required.
End joints
- End-joint qualification and ongoing verification follow ISO 10983:2014 procedures.
- Manufacturers may declare mean and characteristic end-joint strengths following qualification testing or validated historical data.
Glue-line integrity and delamination
- Bond strength is verified by block shear tests (see ISO 12579).
- Delamination testing follows ISO 12580 (methods A–E); maximum total and single-glue-line delamination percentages are specified depending on service class and method.
- Representative full cross-sectional specimens are required for glue-line testing.
Quality management
- Contains manufacturing, factory production control and quality system requirements (personnel, records, on-going testing).
- Annex B is informative on formaldehyde emission.

Practical applications

Provides minimum performance requirements for manufacturers producing glulam beams, columns and other structural elements.
Supports:
- Production quality control and factory testing programs
- Product qualification for building approvals and procurement specifications
- Selection and validation of adhesives and end-joint systems
- Third-party certification bodies and testing laboratories

Who should use this standard

Glulam manufacturers and production engineers
Structural timber product designers and specifiers
Quality assurance/quality control personnel and auditors
Adhesive suppliers and material testers
Building code authorities and certification bodies

Related standards (for implementation)

ISO 9709 - Visual strength grading
ISO 13912 - Machine strength grading
ISO 10983:2014 - Finger/joint qualification and testing
ISO 12579 - Block shear test methods (glue line)
ISO 12580 - Delamination test methods
ISO 20152-1 - Bond performance of adhesives
ISO 8375 - Strength and stiffness test methods (see for structural characteristic tests)
EN 14080 - Alternative provisions for delamination (referenced as an option)

Keywords: ISO 12578:2016, glued laminated timber, glulam, component performance requirements, glue-line integrity, delamination, end joints, adhesives, service class, timber grading, quality control.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope limits
- Applicable to laminations ≤ 50 mm thickness.
- Applies across service classes 1–3, with special precautions for service class 3 (e.g., weather-resistant adhesives).
- Does not determine overall strength/stiffness characteristics (see ISO 8375 for those tests).
Timber grading and laminations
- Laminations must be graded per ISO 9709 (visual) or ISO 13912 (machine grading).
- Laminations and end joints must produce reliable strength/stiffness properties.
Adhesives and bonding
- Adhesives chosen must ensure durable bonds for the intended service life and conditions (climate, moisture, temperature, timber species, preservatives).
- Adhesives shall meet ISO 20152-1 requirements.
- For service class 3, weather-resistant adhesives and appropriate production controls are required.
End joints
- End-joint qualification and ongoing verification follow ISO 10983:2014 procedures.
- Manufacturers may declare mean and characteristic end-joint strengths following qualification testing or validated historical data.
Glue-line integrity and delamination
- Bond strength is verified by block shear tests (see ISO 12579).
- Delamination testing follows ISO 12580 (methods A–E); maximum total and single-glue-line delamination percentages are specified depending on service class and method.
- Representative full cross-sectional specimens are required for glue-line testing.
Quality management
- Contains manufacturing, factory production control and quality system requirements (personnel, records, on-going testing).
- Annex B is informative on formaldehyde emission.

Practical applications

Provides minimum performance requirements for manufacturers producing glulam beams, columns and other structural elements.
Supports:
- Production quality control and factory testing programs
- Product qualification for building approvals and procurement specifications
- Selection and validation of adhesives and end-joint systems
- Third-party certification bodies and testing laboratories

Who should use this standard

Glulam manufacturers and production engineers
Structural timber product designers and specifiers
Quality assurance/quality control personnel and auditors
Adhesive suppliers and material testers
Building code authorities and certification bodies

Related standards (for implementation)

ISO 9709 - Visual strength grading
ISO 13912 - Machine strength grading
ISO 10983:2014 - Finger/joint qualification and testing
ISO 12579 - Block shear test methods (glue line)
ISO 12580 - Delamination test methods
ISO 20152-1 - Bond performance of adhesives
ISO 8375 - Strength and stiffness test methods (see for structural characteristic tests)
EN 14080 - Alternative provisions for delamination (referenced as an option)

Keywords: ISO 12578:2016, glued laminated timber, glulam, component performance requirements, glue-line integrity, delamination, end joints, adhesives, service class, timber grading, quality control.

ISO 12578:2016 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards (for implementation)

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications

Who should use this standard

Related standards (for implementation)

Related standards

Timber — Finger joints — Minimum production requirements and testing methods

Timber structures — Glued laminated timber — Test methods for determination of physical and mechanical proper…

Structural timber — Visual strength grading — Basic principles

Paraformaldehyde for industrial use — Methods of test — Part 2: Determination of ash

Timber structures — Bond performance of adhesives — Part 1: Basic requirements

Timber structures — Glued laminated timber — Method of test for shear strength of glue lines

Timber structures — Glued laminated timber — Methods of test for glue-line delamination