EN 1288 is a multi-part European standard series used to determine the bending strength of glass for building applications using defined laboratory test configurations.
It is commonly referenced when comparing glass strength data, validating glass processing quality (including edge condition where applicable), and supporting design or product qualification decisions. If you need help selecting the most appropriate EN 1288 part for your specimen geometry and edge requirements, talk with our team.
EN 1288: Glass in building — Determination of the bending strength of glass (multi-part series)
EN 1288 is used to generate bending strength results for glass intended for use in buildings. The series is organized into separate parts, each defining a specific test configuration and specimen applicability.
Because fixture geometry and stress distribution vary by part, equipment configuration and the type of strength value produced (for example, whether edge effects are included) depend on the exact part cited.
Quick Definition
What it is: A series of standardized bending-strength test methods for building glass.
What it measures: Bending strength determined from controlled loading until fracture, using defined supports/loading fixtures.
How it is used: To create comparable strength datasets for qualification, quality control, and engineering assessment where standards-based reporting is required.
What This Standard Covers
The EN 1288 series includes multiple parts that define different bending test setups for glass used in building applications. Each part targets a particular specimen form and loading arrangement.
| EN 1288 part | Test configuration (high-level) | Typical reason it is selected |
|---|---|---|
| EN 1288-1 | Fundamentals of testing glass | Defines baseline principles, limitations, and common testing considerations across the series |
| EN 1288-2 | Coaxial double-ring test on flat specimens (large test surface areas) | Used to focus on surface-related strength behavior while minimizing edge influence |
| EN 1288-3 | Four-point bending on flat specimens (supported at two points) | Often selected when edge condition is relevant to the measured strength |
| EN 1288-4 | Testing of channel shaped glass | Addresses profile/channel-shaped specimens that require dedicated support/loading arrangements |
| EN 1288-5 | Coaxial double-ring test on flat specimens (small test surface areas) | Used when smaller loaded areas are required by the method or specimen constraints |
Why This Standard Matters in Testing
Glass is a brittle material where measured strength is strongly influenced by surface condition, edge finishing, and how stresses are introduced during loading. EN 1288 provides defined setups that help labs produce more comparable bending strength results across batches, suppliers, or processes.
For equipment selection, the most important practical point is that different EN 1288 parts require different fixtures (ring-on-ring versus four-point bending versus channel-glass supports). Confirming the exact part early prevents misquoting fixtures, span hardware, or safety enclosures.
Common Materials, Product Types, or Applications Covered
EN 1288 is applied to glass intended for building use, particularly flat glass specimens and (in the channel-glass part) channel shaped products. It is commonly used when glass performance is being characterized for façade, glazing, and architectural product development or qualification programs.
If the application involves laminated constructions or other composite build-ups, confirm applicability carefully against the cited part and edition, because the appropriate method may be specified elsewhere or require additional interpretation.
Common Test or Verification Workflow
EN 1288 testing is typically run as a controlled fracture test where specimens are loaded in bending using a defined fixture until failure, and the failure load is used to calculate a bending strength value for reporting.
Common workflow elements: specimen identification and measurement, selection of the correct EN 1288 part/fixture, controlled loading to fracture, capture of maximum force and relevant dimensions, and reporting of strength results with the cited part and edition.
Equipment Commonly Used for This Standard
Most EN 1288 configurations are performed on a calibrated testing frame capable of controlled compression loading with appropriate force measurement. The fixture set is the defining element: ring-on-ring assemblies for coaxial double-ring methods, multi-roller or multi-point fixtures for four-point bending, and specialized supports for channel shaped glass.
Common equipment: universal testing machine or dedicated compression frame, coaxial double-ring fixtures (ring-on-ring), four-point bending fixtures (support and loading rollers), channel-glass support/loading fixtures (where applicable), specimen measurement tools (thickness/width), and safety shielding for brittle fracture testing.
If you are comparing load capacity, fixture sizes, or guard/safety options for glass fracture testing, you can request a detailed quote for a configuration matched to the EN 1288 part you need to run.
How to Read This Designation or Revision
Series name: “EN 1288” refers to the overall multi-part series for bending strength of building glass.
Part number matters: Always cite the full part designation (for example, EN 1288-2 or EN 1288-3) because each part defines a different fixture and test approach.
Edition matters: In procurement documents and test reports, the designation may include a publication year and may also appear as a national adoption (for example, with a country prefix). Match equipment setup and reporting to the exact designation shown in your contract, drawing notes, or lab procedure.
Related Standards, Methods, or Frameworks
EN 1288 is often used alongside other building-glass standards that define product types, processing routes, or performance requirements, while EN 1288 provides the mechanical bending strength test method framework. When multiple standards are invoked on the same project, align specimen type, edge finish requirements, and acceptance logic to the controlling document(s).
Need help selecting an EN 1288 test setup?
If you share the exact EN 1288 part you need to run and your specimen size/thickness range, we can recommend a practical equipment and fixture path for your lab and help you avoid common mismatch issues between ring-on-ring and bending-fixture configurations. For application guidance, contact our team.