SIST EN 1051-2:2008

Glass in building - Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standard

This document covers the evaluation of conformity and the factory production control requirements of and recommendations for glass block and glass paver units.
This standard does not cover panels incorporating glass blocks or glass paver units.

Glas im Bauwesen - Glassteine und Betongläser - Teil 2: Konformitätsbewertung/Produktnorm

Verre dans la construction - Briques et dalles de verre - Partie 2: Evaluation de la conformité/Norme produit

La présente partie de la Norme européenne traite des exigences et des recommandations concernant l'évaluation de la conformité et le contrôle de la production en usine des briques et pavés de verre.
Cette norme ne traite pas des panneaux incorporant des briques et pavés de verre.

Steklo v gradbeništvu - Stekleni zidaki in stekleni tlakovci - 2. del: Ovrednotenje skladnosti/standard za izdelek

General Information

• Status: Published
• Publication Date: 09-Jan-2008
• ICS: 81.040.20 - Glass in building
• Technical Committee: STV - Steklo, svetloba in razsvetljava v gradbeništvu
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 16-Nov-2007
• Due Date: 21-Jan-2008
• Completion Date: 10-Jan-2008
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/119 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on floorings
• Mandate: M/135 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on flat glass, profiled glass and glass block products
• Ref Project: EN 1051-2:2007 - Glass in building - Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standard

Overview

EN 1051-2:2007 - Glass in building: Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standard specifies how to evaluate conformity and implement factory production control for glass blocks and glass paver units. It covers requirements and recommendations for initial type testing, ongoing quality control, marking and labelling, and the documentation needed to demonstrate compliance. This standard does not apply to panels that incorporate glass blocks or glass paver units.

Key topics and technical requirements

• Scope of conformity: Defines conformity assessment for the product family "glass blocks and glass pavers" in line with EN 1051-1 definitions.
• Initial type testing: Procedures for establishing performance characteristics (mechanical, thermal, optical) through tests or recognized calculation methods and test reports.
• Factory Production Control (FPC): Requirements for organisation, control systems, inspection and testing tables (Annex A) to ensure consistent production quality.
• Continuous surveillance and inspections: Initial factory inspection and ongoing monitoring to verify compliance over time.
• Essential performance characteristics:
  • Mechanical: compressive strength, breaking load, resistance to mechanical stress (see Annex E for compression tests).
  • Thermal: residual stress and resistance to thermal shock (Annex B), and methods to determine thermal transmittance (U‑value) (Annex C).
  • Optical/solar: determination and modelling of light transmittance, reflectance and solar characteristics (Annex D; references EN 410).
  • Durability and dangerous substances considerations.
• Marking, labelling and documentation: Product marking, performance identification paper and guidance for CE marking under the Construction Products Regulation (Annex ZA).
• Optional third‑party involvement: Voluntary procedures for independent certification (Annex F).

Practical applications and who uses this standard

EN 1051-2:2007 is used by:

• Manufacturers of glass blocks and glass pavers to set up FPC and demonstrate product conformity.
• Test laboratories and quality-control personnel for performing required initial and routine tests (compression, thermal shock, optical and U‑value assessments).
• Certification bodies and notified bodies assessing conformity and CE marking documentation.
• Architects, façade engineers and specifiers who need validated performance data (mechanical strength, thermal transmittance, light transmission) when selecting glass block/paver systems.
• Contractors and building inspectors verifying that installed products meet regulatory and safety requirements.

Benefits: ensures consistent product quality, supports CE marking and regulatory compliance, and provides reliable data for structural, thermal and daylighting design decisions.

Related standards

Key normative references cited in EN 1051-2:2007 include:

• EN 1051-1 (Definitions & description)
• EN 572-1 (Soda lime silicate glass)
• EN 410 (Luminous and solar characteristics)
• EN 673 (U‑value calculation)
• EN 356, EN 1063, EN 13501-1, EN 13541, EN ISO 7459, EN ISO 7500-1

For manufacturers and specifiers, EN 1051-2 is central when demonstrating conformity and documenting performance of glass blocks and glass pavers.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Glass in building - Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standardSteklo v gradbeništvu - Stekleni zidaki in stekleni tlakovci - 2. del: Ovrednotenje skladnosti/standard za izdelekVerre dans la construction - Briques et dalles de verre - Partie 2: Evaluation de la conformité/Norme produitGlas im Bauwesen - Glassteine und Betongläser - Teil 2: Konformitätsbewertung/ProduktnormTa slovenski standard je istoveten z:EN 1051-2:2007SIST EN 1051-2:2008en,de81.040.20ICS:SLOVENSKI
STANDARDSIST EN 1051-2:200801-februar-2008

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1051-2October 2007ICS 81.040.20 English VersionGlass in building - Glass blocks and glass pavers - Part 2:Evaluation of conformity/Product standardVerre dans la construction - Briques et dalles de verre -Partie 2: Evaluation de la conformité/Norme produitGlas im Bauwesen - Glassteine und Betongläser - Teil 2:Konformitätsbewertung/ProduktnormThis European Standard was approved by CEN on 18 August 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1051-2:2007: E

Factory production control.15 A.1 Factory Production Control Requirements.15 A.1.1 General.15 A.1.2 Organisation.15 A.1.3 Control system.15 A.2 Marking.16 A.3 Inspection and testing tables of glass blocks and glass paver unit production.16 A.3.1 Information on Table A.1.16 A.3.2 Use of proxy testing.17 Annex B (normative)
Residual stress/Thermal shock.20 B.1 Requirement.20 B.2 Test method.20 B.2.1 General.20 B.2.2 Factory production control.20 B.2.3 On-going evaluation of conformity.20 B.3 Evaluation of test results.21 B.3.1 Factory production control.21 B.3.2 On-going evaluation of conformity.21 Annex C (normative)
Determination of the thermal transmittance (U-value) of glass blocks and glass paver units.22

Modelling of glass blocks and glass paver units for the determination of the light transmittance, light reflectance and solar energy characteristics.24 Annex E (normative)
Compression strength test method, sampling, requirements and evaluation in factory production control.25 E.1 Glass blocks.25 E.1.1 Test equipment and procedure.25 E.1.2 Test specimen preparation.25 E.2 Glass paver units.26 E.2.1 Test equipment and procedure.26 E.2.2 Test specimen preparation.27 E.3 Requirements.27 E.3.1 Glass blocks.27 E.3.2 Glass paver units.27 E.4 Evaluation.27 Annex F (informative)
Provisions for voluntary involvement of third party(ies).28 F.1 General.28 F.2 Voluntary tasks for third parties.28 F.3 Marking and labelling.28 Annex ZA (informative) Clauses of this European Standard addressing the provisions of EU Construction Products Directive.29 ZA.1 Scope and relevant characteristics.29 ZA.2 Procedure(s) for the attestation of conformity of basic soda lime silicate glass products.31 ZA.2.1 System(s) of attestation of conformity.31 ZA.2.2 EC Certificate and Declaration of conformity.33 ZA.3 CE marking and labelling.34 Bibliography.38

1 Scope This document covers the evaluation of conformity and the factory production control requirements of and recommendations for glass block and glass paver units. This standard does not cover panels incorporating glass blocks or glass paver units. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 356, Glass in building — Security glazing - Testing and classification of resistance against manual attack EN 410, Glass in building — Determination of luminous and solar characteristics of glazing EN 572-1, Glass in building — Basic soda lime silicate glass products — Part 1: Definitions and general physical and mechanical properties EN 673, Glass in building — Determination of thermal transmittance (U value) — Calculation method
EN 1051-1:2003, Glass in building — Glass blocks and glass pavers — Part 1: Definitions and description EN 1063, Glass in building — Security glazing — Testing and classification of resistance against bullet attack EN 13501-1, Fire classification of construction products and building elements — Part 1: Classification using data from reaction to fire tests EN 13541, Glass in building — Security glazing — Testing and classification of resistance against explosion pressure EN ISO 7459, Glass containers — Thermal shock resistance and thermal shock endurance — Test methods (ISO 7459:2004) EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Verification and calibration of the force-measuring system (ISO 7500-1:2004) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 1051-1:2003 and the following apply. 3.1
initial type testing determination of the performance of a product (characteristic, durability), on the basis of either actual tests or other procedures (such as conventional, standardised, tabulated or general accepted values, standardised or recognised calculation methods, test reports when made available, …), in accordance with this standard that demonstrates compliance with this standard 3.2
test report document that covers the results of tests undertaken on a representative sample of the product from production or on a prototype design of the product

NOTE EN 1051-1 covers dimensional, compressive strength and breakage load requirements.
4.2 Determination of the performances of characteristics 4.2.1 Characteristics of glass blocks and glass paver units Glass blocks and glass paver units are made of soda lime silicate glass in accordance with EN 572-1.
The characteristics listed in Table 1, concern general accepted values, calculated values or measured values Table 1 — Necessary information on characteristics of soda lime silicate glass
Characteristic
Symbol
Unit Generally accepted values: - density - hardness - Young's modulus -
- Poisson's ratio - Specific heat capacity - Coefficient of linear expansion - Thermal conductivity (for U-value) - Mean refractive index to visible radiation - Emissivity
ρ HK0,1/20 E µ c α λ n ε
kg/m³ GPa Pa Dimensionless J/(kg.K) K-1 W/(m.K) Dimensionless Dimensionless Measured values: - light transmittance - solar direct transmittance
τv τe
Dimensionless Dimensionless Calculated values: - total solar energy transmittance
g
Dimensionless
- - -
N/mm2 kN K a
For glass blocks – determined in accordance with EN 1051-1:2003,
Annex A b
For glass paver units – determined in accordance with EN 1051-1:2003, Annex B c
For glass blocks and glass paver units – determined in accordance with Annex B
4.2.2 Determination of essential characteristics of glass blocks and glass paver units 4.2.2.1 General The essential characteristics that are specific to blocks and glass paver units are as follows:  Safety in the case of fire - Reaction to fire.  Safety in use – Mechanical resistance: Resistance against sudden temperature changes and temperature differentials.  Safety in use – Mechanical resistance.  Protection against noise – Airborne sound reduction.  Energy conservation and heat retention – Thermal properties.  Energy conservation and heat retention – Radiation properties – Light transmittance and reflectance.  Energy conservation and heat retention – Radiation properties – Solar energy characteristics. Other characteristics are only applicable for panels made of glass blocks or glass paver units. If the glass block and glass paver unit manufacturer wishes to claim that any performance characteristic is independent of the production equipment used then the factory production control system shall be in accordance with this standard including his specific process control conditions. 4.2.2.2 Safety in the case of fire - Reaction to fire Reaction to fire shall be determined and classified in accordance with EN 13501-1. Basic soda lime silicate glass products are products/materials that do not require to be tested for reaction to fire (e.g. Products/materials of Classes A1* according to Commission Decision 96/603/EC, as amended 2000/605/EC)

4.2.2.7 Safety in use - Mechanical resistance The mechanical strength is determined by the compressive strength.
Use the compressive strength and/or the breaking load values determined in 4.1. 4.2.2.8 Protection against noise - Direct airborne sound reduction For direct airborne sound reduction, the glass density and the mass of the glass block or glass paver unit is relevant. The glass density is a conventional value (EN 572-1), the mass shall be determined in accordance with EN 1051-1. 4.2.2.9 Energy conservation and heat retention - Thermal properties The thermal transmittance shall be determined in accordance with Annex C.
However more accurate U-values can be calculated, and may be declared, e.g. by means of finite element or finite difference methods on the basis of the thermal conductivity λ of glass (refer to EN 572-1) and the glass block or glass paver unit dimensions, form and shape in accordance with EN 1051-1.
4.2.2.10 Energy conservation and heat retention - Radiation properties: Light transmittance and reflectance The basic radiation properties shall be determined on a specimen of flat glass prepared from a glass block or glass paver unit. The basic light transmittance and reflectance shall be determined in accordance with EN 410. NOTE EN 410 is the reference method. If modelling is used to determine the light transmittance and reflectance of the glass block or glass paver unit it shall be in accordance with Annex D.

The manufacturer shall supply specific installation instructions or make reference to appropriate technical specifications. NOTE The durability of glass products depends on:
 building and construction movements due to various actions;  building and construction vibrations due to various actions;  deflection and racking of the glass support due to various actions;  glass support design (e.g. drainage of infiltrated water in the rebate, prevention of direct contact between glass support members and glass);  accuracy of glass support and glass support member dimensions;  quality of the assembling of glass support members up to a glass support;  quality of installation of the glass support into or onto the buildings or constructions;  glass support expansion due to adsorbed moisture from the air or other sources;  quality of installation of the glass product into or onto its support. 4.4 Characteristics other than those listed in 4.2 Optical and visual characteristics shall comply with EN 1051–1. Dimensional tolerances shall comply with EN 1051–1. 4.5 Dangerous substances Materials used in products shall not release any dangerous substances in excess of the maximum permitted levels specified in a relevant European Standard for the material or permitted in the national regulations of the member state of destination.

This shall include the following: a) Inspection of samples taken at the factory in accordance with a prescribed test plan; b) Initial inspection of the factory and of factory production control; c) Continuous surveillance and assessment of the factory production control. 2) Initial type testing of the product; NOTE There may be a need to involve a third party, with 1b, 1c, and/or 2, for the purpose of regulatory marking (see Annex ZA). 5.2 Initial type testing of the product (5.1, 2) 5.2.1 General 5.2.1.1 Introduction All the product’s characteristics shall be initial type tested to verify they are in conformity with the requirements of this standard. Instead of performing any actual testing, initial type testing may make use of:  generally accepted and/or conventional and/or standardised values, in the Clause 2 referenced standards, or in publications that are referred to in these standards;  standardised calculation methods and recognised calculation methods in
Clause 2 referenced standards, or in publications that are referred to in these standards;  test report(s) on the basis of 5.2.1.3 when made available except for the characteristics listed in 5.2.2.  where components are used whose characteristics have already been determined, by the component manufacturer, on the basis of conformity with other product standards, these characteristics need not be reassessed providing they remain unchanged by the manufacturing process;  release of dangerous substances may be assessed indirectly by controlling the content of the substance concerned;  durability may be assessed indirectly by controlling the production processes according to this standard; NOTE 1 Products CE marked in accordance with appropriate harmonised European specifications may be presumed to have the performances stated with the CE marking.
NOTE 2 There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). When actual testing is required then the Initial Type Testing (ITT) shall be undertaken on a sample representative of the product taken from direct production or a prototype, any plant and/ or line. NOTE 3 ITT should be undertaken using the reference method.

5.2.3 Type testing of performances of characteristics All characteristics in 4.2.2 shall be subject to initial type tests in accordance with 5.2.1.
The terms ‘manufacturer’ and ‘producer’ are understood as being synonyms (see
http://europa.eu.int/comn/enterprise/newapproach/newapproach.htm)

All elements, requirements and provisions adopted by the manufacturer shall be documented in a systematic manner in the form of written policies and procedures. This production control system documentation shall ensure a common understanding of quality assurance and enable the achievement of the required product characteristics and the effective operation of the production control system to be checked. Factory production control shall be according to Annex A of this standard. NOTE 1 A factory production control system similar to EN ISO 9001 made product specific to this standard is deemed to satisfy the requirements of this clause. NOTE 2 There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). Annex A of this standard also summarises the tests that shall be carried out by the manufacturer as part of the production control in the factory, and as further testing of samples taken at the factory in accordance with a prescribed test plan. 5.4 Initial inspection of factory and of factory production control (5.1, 1b) The initial inspection of the factory and of the factory production control shall be limited to the parameters listed in Table 4 in conjunction with Annex A.
NOTE There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). Table 4 — Characteristics of interest for the Factory Production Control Nr Characteristic Interested parameter related to the characteristic For details, refer to a Reaction to fire - checking incoming materials - chemical composition - product control after manufacturing - labelling outgoing products Annex A b Dangerous substances - checking incoming materials
c Bullet resistance a Explosion resistance a Burglar resistance a Compressive strength Breakage load Residual stress - checking incoming materials - chemical composition - product control after manufacturing - labelling outgoing products Annex A d Sound reduction Light transmittance and reflection Solar energy characteristic Thermal conductivity - checking incoming materials - chemical composition - product control after manufacturing - labelling outgoing products Annex A a Not applicable as these characteristics can only be determined on panels.

5.5 Continuous surveillance and assessment of the factory production control (5.1, 1c) The continuous surveillance and assessment of the factory production control shall be limited to the parameters listed in Table 4 in conjunction with Annex A.
NOTE There may be a need to involve a third party for the purpose of regulatory marking (see Annex ZA). The frequency of production surveillance shall be twice per year for new production facilities or for facilities that do not already have a factory production control system in accordance with this standard.
When assessment of FPC fails to identify major non-conformances the outcome fulfils the requirements during four successive assessments the frequency can be reduced to once a year.
When a major non-conformance is recorded, the inspection shall be repeated within two month. The frequency of production surveillance shall return to, or remain at twice a year. When the repeated inspection also results in a non-conformance, then the production shall be subject within two months to a repeated initial inspection of the factory and of the factory production control together with a surveillance inspection. When this repeated initial inspection and surveillance inspection also results in a major non-conformance then the products are considered as no longer conforming to this standard. 6 Marking and labelling 6.1 General All voluntary marking and/or labelling shall comply with Annex F.3.
Care shall be taken to ensure that any voluntary marking and/or labelling does not cause confusion with respect to the mandatory requirements. NOTE All marking and/or labelling of product to demonstrate compliance with the regulatory requirement is detailed in Annex ZA. 6.2 Product marking There is no requirement to mark glass blocks and glass paver units. 6.3 Product characteristics
The manufacturer or his agent shall organise a system of references that allows for the following:  the identification of exactly which characteristics have to be assessed (see 4.2);  those characteristics that will be assessed;  the values, classes, categories, etc. that have been determined for those characteristics.
This system shall be documented as part of the evaluation of conformity.
6.4 “Characteristics/performance identification paper” The manufacturer shall prepare a “characteristics/performance identification paper” based on the information collected on the product characteristics (see 6.3). This document shall be part of the manufacturers' technical file and is the basis for the accompanying information as required for regulatory purposes.

Factory production control A.1 Factory Production Control Requirements A.1.1 General The FPC system shall consist of procedures, regular inspections and tests and/or assessments and the use of the results to control [raw and other] incoming materials or components, equipment, the production process and the product. NOTE An FPC system conforming to EN ISO 9001 and made specific to the requirements of this standard is deemed to satisfy the requirements of this standard. A.1.2 Organisation A.1.2.1 Responsibility and authority The responsibility, authority and the interrelation of all personnel who manage, perform and verify work affecting conformity shall be defined, particularly for personnel who have the organizational freedom and authority to: a) initiate action to prevent the occurrence of product non-conformity; b) identify and record any product non-conformances. A.1.2.2 Management representative for factory production control The manufacturer shall appoint a management representative who, irrespective of other responsibilities, shall have defined authority and responsibility for ensuring that the requirements of this standard are implemented and maintained. A.1.2.3 Management review The production control system shall be reviewed by the manufacturer’s management at appropriate intervals in accordance with the manufacturer’s control system to ensure its continuing suitability and effectiveness. Records of such reviews shall be maintained for a minimum period of 5 years. A.1.3 Control system A.1.3.1 General The manufacturer shall establish and maintain a documented system as a means of ensuring that the product conforms to EN 1051-1. The following requirements shall be fulfilled. A.1.3.2 Personnel The manufacturer shall use appropriately trained personnel for the operation and inspections of all production and inspection equipment.

The organizational structure, responsibilities and authorities of the management with regard to product conformity. b) The procedures for specifying and verifying the incoming materials. c) The manufacturing, production control and other techniques, processes and systematic actions that will be used. d) The inspections that will be carried out before production, the inspections and tests during and after production, and the frequency at which they will be carried out. e) Required records of the inspections, test and assessments. f) Non-conformity situations requiring corrective action and the action taken. g) Unless otherwise indicated in national regulation records shall be kept for a minimum of one year after manufacturing the product. A.1.3.4 Test equipment Calibration of test equipment necessary for factory production control shall be documented. NOTE The precision of calibration required is implied by the accuracy of the test method and tolerances specified. A.1.3.5 Inspection and testing A.3 designates the inspections and tests by means of tables. The requirements and records shall be normative.
Frequencies shall be regarded as a minimum frequency. A.2 Marking The manufacturer shall establish, document and maintain procedures for marking of the products. The product shall be marked in accordance with the established documents. For tracing purposes, the manufacturer shall establish and maintain the records required in A.3. A.3 Inspection and testing tables of glass blocks and glass paver unit production A.3.1 Information on Table A.1 The table consist of three parts:  section 1: Material control  section 2: Production Control  section 3 : Product control

 non- conforming products cannot be delivered. The required records in Table A.1 may be any document such as order documents, production documents, logbook, etc, as described in the FPC procedures and associated documentation. For those criteria where no record is required this situation shall only apply until a complaint regarding that criteria is received. Records shall subsequently be kept to show that corrective action has been successful. The machinery and equipment used for manufacturing the products shall be checked at periods consistent with the manufacturers’ documented process control against defined parameters, maintained and adjusted for optimal results. A.3.2 Use of proxy testing A manufacturer may employ a test method/method of evaluation other than those referred to in Table A.1. However, it shall be the manufacturer’s responsibility to prepare suitable documentation describing such tests and their correlation with the recommended method to ensure that the appropriate characteristic is as declared.

(decision to be made by Requirement (decision to be made by Record
manufacturer)
manufacturer)
1.1 Incoming materials 1.1.1 raw material(chemical option a)MeasurementSee purchase specificationsee FPC documentationYes
composition, humidity, option b)-Audit of supplier-QA system, e.g. EN ISO 9001or -According to audit planYes
granulometry, …)
- Supplier data check - See purchase specification - As agreed with supplier Yes 1.1.2 culletVisualSee purchase specificationEach batchYes 1.1.3 raw material transport VisualSee purchase specificationsee FPC documentationNo
(check for contamination of vehicle)
Section 2: Production control Ref. Material, inspection or testProposed methoda Proposed frequency
(decision to be made by Requirement (decision to be made by Record
manufacturer)
manufacturer)
2.1 Process control 2.1.1 process conditions of production See relevant documentation See relevant documentation See relevant documentation Yes
equipment/machinery in FPC manual in FPC manual in FPC manual

Section 3: Product control
Proposed methoda
Ref. Inspection or test (decision to be made by Requirement Frequency Record
manufacturer)
3.1 Finished Product 3.1.1 chemical composition chemical analysisEN 572-1once per monthYes 3.1.2 mass measurement EN 1051-1 EN 1051-1 and product description Daily b Yes 3.1.3 dimensions and tolerances measurement EN 1051-1 and product description see FPC documentation Yes 3.1.4 visual/optical quality visual See product description see FPC documentation No 3.2 Product Compliance
3.2.1 compressive strength c Annex E1
EN 1051-1 Daily - 20 specimens
Yes 3.2.2 creakage load d Annex E2 EN 1051-1 Daily - 20 specimens
Yes 3.2.3 residual stress Annex B Annex B Annex B Yes 3.3 On-going conformity 3.3.1 compressive strength c
EN 1051-1 (reference test)EN 1051-120 specimens per year, per size Yes
3.3.2 breakage load d EN 1051-1EN 1051-13.2 residual stressAnnex BAnnex BAnnex BYes a
When a not recommended test method is used, the correlation with the recommended method shall be established. b
10 specimens per size/product, per production line to be tested c
For glass blocks only. Test for each production line, for each size/type and when a size/type change is made. d
For glass paver units only. Test for each production line, for each size/type and when a size/type change is made.

Residual stress/Thermal shock B.1 Requirement The residual stress is subject of a threshold value. At least 90 % of the test specimen per sample shall resist a thermal shock temperature difference as indicated in Table B.1. Table B.1 — Thermal shock tempe
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