EN 1058:2024
(Main)Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean values
General Information
- Abstract
On the basis of test results from wood-based panel products for structural purposes, this document specifies a method for the determination of:
- characteristic 5-percentile values of mechanical properties under the assumption of a log-normal distribution of the test data according to EN 14358; and
- characteristic mean values (50-percentile values) of physical properties under the assumption of a normal distribution of the test data according to EN 14358.
Test data can be determined from tests using the test methods outlined in the test standard EN 789 or other relevant test standard, performance standard or product standard normatively referring to EN 1058.
NOTE See e.g. EN 1195 and EN 12871.
The statistical evaluation follows the principles of EN 1990:2023 , Annex D of EN 1995-1-1:2004 and of EN 14358:2016.
- Status
- Published
- Publication Date
- 10-Dec-2024
- Technical Committee
- CEN/TC 112 - Woodbased panels
- Drafting Committee
- CEN/TC 112/WG 4 - Test methods
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 11-Dec-2024
- Due Date
- 05-Aug-2025
- Completion Date
- 11-Dec-2024
Overview
EN 1058:2024 - "Wood‑based panels - Determination of characteristic 5‑percentile values and characteristic mean values" (CEN) specifies statistical procedures for deriving characteristic material values from test results for structural wood‑based panels. The standard defines how to calculate characteristic 5‑percentile values for mechanical (strength) properties and characteristic mean (50‑percentile) values for physical properties and stiffness, using established statistical assumptions and test data from relevant test standards.
Key topics and requirements
- Statistical basis
- Strength properties: assume a log‑normal distribution; characteristic 5‑percentile values calculated per EN 14358 (Annex A informative).
- Physical properties and modulus of elasticity: assume a normal distribution; characteristic mean (50‑percentile) values calculated per EN 14358 (Annex B informative).
- Statistical evaluation follows principles in EN 1990:2023, Annex D of EN 1995‑1‑1:2004, and EN 14358:2016.
- Sampling
- Sample size follows the relevant test or performance standard (EN 789 referenced). For EN 789 tests, a minimum of 32 panels of the same type/grade/thickness should be sampled at random.
- When fewer than 32 shifts exist at a production site, a maximum of four panels may be taken from each shift.
- Testing
- Test methods referenced include EN 789 (mechanical properties) and EN 1195 (performance of structural floor decking), or other standards that normatively refer to EN 1058.
- Analysis and acceptance
- Procedures for calculation of sample means, standard deviations and statistical factors (k‑values) are included; Annex A gives worked examples for log‑normal data.
- Acceptance is based on comparing the calculated characteristic value with specification limits in the applicable performance or product standard.
- Test report must include reference to EN 1058:2024, sampling details, product type, panel counts/dates, method of sampling/calculation, results, deviations, observations and test date.
Applications and users
EN 1058:2024 is used by:
- Manufacturers of structural wood‑based panels to establish declared characteristic values for product specifications and CE marking.
- Test laboratories and quality control teams conducting mechanical and physical property testing.
- Certification bodies, product standard authors and regulatory agencies verifying compliance with performance requirements.
- Structural engineers and specifiers who rely on characteristic values for design and safety assessments.
Keywords: EN 1058:2024, wood‑based panels, characteristic 5‑percentile values, characteristic mean values, log‑normal distribution, EN 14358, EN 789, structural panels, statistical evaluation.
Related standards
- EN 789 (Timber structures - Test methods)
- EN 1195 (Performance of structural floor decking)
- EN 14358 (Statistical procedures)
- EN 1990:2023 and EN 1995‑1‑1:2004 (statistical/structural design principles)
Relations
- Effective Date
- 03-May-2023
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Referred By
EN 636:2012 - Plywood - Specifications - Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Gozdarski inštitut Slovenije
Slovenian Forestry Institute. Forest management certification support, timber testing.
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Frequently Asked Questions
EN 1058:2024 is a standard published by the European Committee for Standardization (CEN). Its full title is "Wood-based panels - Determination of characteristic 5-percentile values and characteristic mean values". This standard covers: On the basis of test results from wood-based panel products for structural purposes, this document specifies a method for the determination of: - characteristic 5-percentile values of mechanical properties under the assumption of a log-normal distribution of the test data according to EN 14358; and - characteristic mean values (50-percentile values) of physical properties under the assumption of a normal distribution of the test data according to EN 14358. Test data can be determined from tests using the test methods outlined in the test standard EN 789 or other relevant test standard, performance standard or product standard normatively referring to EN 1058. NOTE See e.g. EN 1195 and EN 12871. The statistical evaluation follows the principles of EN 1990:2023 , Annex D of EN 1995-1-1:2004 and of EN 14358:2016.
On the basis of test results from wood-based panel products for structural purposes, this document specifies a method for the determination of: - characteristic 5-percentile values of mechanical properties under the assumption of a log-normal distribution of the test data according to EN 14358; and - characteristic mean values (50-percentile values) of physical properties under the assumption of a normal distribution of the test data according to EN 14358. Test data can be determined from tests using the test methods outlined in the test standard EN 789 or other relevant test standard, performance standard or product standard normatively referring to EN 1058. NOTE See e.g. EN 1195 and EN 12871. The statistical evaluation follows the principles of EN 1990:2023 , Annex D of EN 1995-1-1:2004 and of EN 14358:2016.
EN 1058:2024 is classified under the following ICS (International Classification for Standards) categories: 79.060.01 - Wood-based panels in general; 79.060.10 - Plywood. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1058:2024 has the following relationships with other standards: It is inter standard links to EN 1058:2009, EN 789:2004, EN 1195:1997, EN ISO 25239-3:2020, EN 13986:2004+A1:2015, EN ISO 25239-2:2020, EN 14272:2011, EN 636:2012, EN 13810-1:2002, EN 12369-1:2001, EN 13353:2008+A1:2011, EN 636:2012+A1:2015, EN 1156:2013, EN 634-2:2007, EN 14279:2004+A1:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 1058:2024 is associated with the following European legislation: EU Directives/Regulations: 305/2011; Standardization Mandates: M/113. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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