Toimialayhteisöt

Toimialayhteisö: SFS Suomen Standardit
Komitea: ISO/IEC JTC 1/SC 27 (Information security, cybersecurity and privacy protection)
Alkuperä: ISO
Määräpäivä: 2026-11-13
LaajennaSupista
 
This document establishes considerations for analysing, comparing or differentiating the characteristics of age assurance systems or components. The document includes metrics, elements and indicators of effectiveness for age assurance systems or components.
Toimialayhteisö: Suomen ympäristökeskus
Komitea: ISO/TC 190/SC 3 (Chemical and physical characterization)
Alkuperä: ISO
Määräpäivä: 2026-11-13
LaajennaSupista
 
This document specifies a basic method of determining the particle size distribution applicable to a wide range of mineral soil materials, including the mineral fraction of organic soils. It also offers procedures to deal with the less common soils mentioned in the introduction. This document has been developed largely for use in the field of environmental science, and its use in geotechnical investigations is something for which professional advice might be required. A major objective of this document is the determination of enough size fractions to enable the construction of a reliable particle-size-distribution curve. This document does not apply to the determination of the particle size distribution of the organic components of soil, i.e. the more or less fragile, partially decomposed, remains of plants and animals. It is also realized that the chemical pre-treatments and mechanical handling stages in this document could cause disintegration of weakly cohesive particles that, from field inspection, might be regarded as primary particles, even though such primary particles could be better described as aggregates. If such disintegration is undesirable, then this document is not used for the determination of the particle size distribution of such weakly cohesive materials.
Toimialayhteisö: Muoviteollisuus
Komitea: ISO/TC 219 (Floor coverings)
Alkuperä: ISO
Määräpäivä: 2026-11-15
LaajennaSupista
 
This document specifies a method for determination of tuft withdrawal force and is applicable to all textile floor coverings with a cut and/or loop pile yarn structure.
Toimialayhteisö: Muoviteollisuus
Komitea: ISO/TC 219 (Floor coverings)
Alkuperä: ISO
Määräpäivä: 2026-11-15
LaajennaSupista
 
This document establishes a classification system for resilient, textile, laminate and modular mechanical locked floor coverings. The classification is based on practical requirements for areas of use and intensity of use and is linked to the requirements specified in the relevant documents for each type of floor covering. This document is also intended to provide guidance for manufacturers, specifiers and consumers, to enable them to choose the appropriate class of floor covering for any given area of use or specific room. NOTE The wear and appearance of floor coverings are influenced by standards of installation and maintenance, the condition of the subfloor and the kind of use (type of footwear, high concentrations of localized traffic, etc.). These factors are intended to be taken into account when using this classification system.
Toimialayhteisö: Muoviteollisuus
Komitea: ISO/TC 138/SC 2 (Plastics pipes and fittings for water supplies)
Alkuperä: ISO
Määräpäivä: 2026-11-15
LaajennaSupista
 
This document specifies the requirements of fitness for purpose of assembled polyethylene (PE) piping systems intended for the conveyance of water intended for human consumption, raw water prior to treatment, drains and sewers under pressure, vacuum sewer systems, and water for other purposes, with the exception of industrial application. It specifies the requirements for the following types of joint assemblies with pipes or spigot ends: (A) electrofusion socket fitting ; — (B) electrofusion saddle fitting ; — (C) butt fusion joint (“pipe to pipe” and “pipe to spigot end fittings”); — (D) mechanical joint; — (E) socket fusion joint. It specifies the method of preparation of test piece joints and the tests to be carried out on these joints for assessing the fitness for purpose of the system under normal and extreme conditions. It specifies the test parameters for the test methods referred to in this document. This document is intended to be used only by the product manufacturer and test laboratories to assess the performance of components in accordance with ISO 4427-2 and ISO 4427-3 when joined together under normal and extreme conditions in accordance with this document. It is not intended for on-site testing of pipe systems. In conjunction with ISO 4427-1, ISO 4427-2 and ISO 4427-3, this document is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions: a) allowable operating pressure, PFA, up to 25 bar111 bar = 0,1 MPa. = 105 Pa; 1 MPa = 1 N/mm2; b) an operating temperature of 20 °C as a reference temperature for design purposes. For applications operating at constant temperatures greater than 20 °C up to and including 50 °C, see ISO 4427-1, XXXX - Annex A. The ISO 4427 series covers a range of allowable operating pressures and gives requirements concerning colours.
Toimialayhteisö: Muoviteollisuus
Komitea: ISO/TC 138/SC 2 (Plastics pipes and fittings for water supplies)
Alkuperä: ISO
Määräpäivä: 2026-11-15
LaajennaSupista
 
This document specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for buried or above ground applications, intended for the conveyance of: water for human consumption; — raw water prior to treatment; — drains and sewers under pressure; — vacuum sewer systems; — water for irrigation — water for other purposes, with the exception of industrial applications. The intended uses include sea outfalls, laid in water and suspended below bridges. NOTE 1 Attention is drawn to Clause 6 of this document for PE components for the conveyance of water intended for human consumption and raw water prior to treatment. Components manufactured for water for other purposes, drains and sewers, and vacuum sewer systems are possibly not suitable for water supply for human consumption. PE pipe systems for industrial applications and irrigation with limited pressure exposure are not covered by this document. NOTE 2 Industrial application is covered by ISO 15494 [3], irrigation with limited pressure exposure is covered by ISO 8779:2020 [4] . This document also specifies the test parameters for the test methods referred to in this document. In conjunction with iso:proj:72183ISO 4427-1, iso:proj:72184ISO 4427-2, and iso:proj:72186ISO 4427-5, this document is applicable to PE pipes, fittings and valves, their joints and to joints with components made of PE and other materials, intended to be used under the following conditions: a) a maximum allowable operating pressure (PFA) up to and including 25 bar1; b) an operating temperature of 20 °C as the reference design temperature. For applications operating at constant temperatures greater than 20 °C and up to and including 50 °C, derating coefficients are specified in ISO/DIS 4427-1, Annex A. The ISO 4427 series cover a range of maximum allowable operating pressures and gives requirements concerning colours. These fittings can be of the following types: — electrofusion socket fittings; — electrofusion saddle fittings; — spigot end fittings (for butt fusion using heated tools and electrofusion); — socket fusion fittings (see Annex A); — mechanical fittings; — fabricated fittings (see Annex B). NOTE 3 The fittings can be, for example, in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends or end caps. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes. 1 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
Toimialayhteisö: Muoviteollisuus
Komitea: ISO/TC 138/SC 2 (Plastics pipes and fittings for water supplies)
Alkuperä: ISO
Määräpäivä: 2026-11-15
LaajennaSupista
 
This document specifies the characteristics of pipes made from polyethylene (PE) for buried or above ground applications, intended for the conveyance of: water for human consumption; — raw water prior to treatment; — drains and sewers under pressure; — vacuum sewer systems; — water for irrigation; — water for other purposes, with the exception of industrial applications. The intended uses include sea outfalls, laid in water and suspended below bridges. NOTE 1 Attention is drawn to 6.3 of this document for PE components for the conveyance of water intended for human consumption and raw water prior to treatment. Components manufactured for water for other purposes, drains and sewers, and vacuum sewer systems are possibly not suitable for water supply for human consumption. NOTE 2 Additional information related to the installation of PE 100-RC systems is given in iso:proj:72183ISO 4427-1. PE pipe systems for industrial applications and irrigation with limited pressure exposure are not covered by this document. NOTE 3 Industrial application is covered by ISO 15494 [4], irrigation with limited pressure exposure is covered by ISO 8779 [5]. For use in contaminated soils special consideration shall be taken for pipes intended for the transport of water intended for human consumption or raw water prior to treatment. NOTE 4 Pipes with barrier layers are not covered by this document. ISO 21004 [6] provides an alternative solution for use in contaminated soils. This document also specifies the test parameters for the test methods referred to in this document. In conjunction with ISO/DIS 4427-1, ISO/DIS 4427-3, and ISO/DIS 4427-5, this document is applicable to PE pipes, their joints and to joints with components made of PE and other materials, intended to be used under the following conditions: a) allowable operating pressure (PFA) up to and including 25 bar111 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.; b) an operating temperature of 20 °C as the reference temperature. For applications operating at constant temperatures greater than 20 °C and up to and including 50 °C, see Annex A of ISO/DIS 4427-1. The ISO 4427 series cover a range of allowable operating pressures and gives requirements concerning colours. This document is applicable to three types of pipes: — PE pipes (outside diameter dn), including any identification stripe; — PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter dn) as specified in Annex A, where all layers have the same MRS rating; — PE pipes (outside diameter dn) with a peelable and contiguous thermoplastics additional layer on the outside of the pipe (“coated pipe”) as specified in Annex B. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.
Toimialayhteisö: Muoviteollisuus
Komitea: ISO/TC 138/SC 2 (Plastics pipes and fittings for water supplies)
Alkuperä: ISO
Määräpäivä: 2026-11-15
LaajennaSupista
 
This document specifies materials and the general aspects of polyethylene (PE) pressure piping systems (mains and service pipes) for buried or above ground applications, intended for the conveyance of: water intended for human consumption, — raw water prior to treatment, — drains and sewers under pressure, — vacuum sewer systems, — water for irrigation, — water for other purposes, with the exception of industrial applications. The intended use includes sea outfalls, laid in water and pipes suspended below bridges. NOTE 1 Attention is drawn to Clause 6 of this document for PE components for the conveyance of water intended for human consumption and raw water prior to treatment. Components manufactured for water for other purposes, drains and sewers, and vacuum sewer systems are possibly not suitable for water supply for human consumption. PE pipe systems for industrial applications and irrigation with limited pressure exposure are not covered by this document. NOTE 2 Industrial application is covered by iso:proj:55627ISO 15494, irrigation with limited pressure exposure is covered by ISO 8779 [3]. This document also specifies the test parameters for the test methods referred to in this document. In conjunction with ISO/DIS 4427-2, ISO/DIS 4427-3 and ISO/DIS 4427-5, this document is applicable to PE pipes and fittings, their joints and to joints with components made of PE and other materials, intended to be used under the following conditions: a) a maximum allowable operating pressure (PFA) up to and including 25 bar; b) an operating temperature of 20 °C as the reference design temperature. For applications operating at constant temperatures greater than 20 °C and up to and including 50 °C, see Annex A. The ISO 4427 series covers a range of maximum allowable operating pressures and gives requirements concerning colours. It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national guidance or regulations and installation practices or codes.
Toimialayhteisö: Rakennustuoteteollisuus RTT
Komitea: SFS (SFS Suomen Standardit)
Alkuperä: SFS
Määräpäivä: 2026-11-15
LaajennaSupista
 
Tämä standardi on laadittu eurooppalaisia yhdenmukaistettuja tuotestandardeja SFS-EN 1338, SFS-EN 1339,SFS-EN 1340, SFS-EN 1341, SFS-EN 1342 ja SFS-EN 1343 täydentäväksi kansalliseksi soveltamisstandardiksi. Tässä soveltamisstandardissa esitetään suositus, mitkä ominaisuudet on ilmoitettava ko. tuotestandardien mukaan CE-merkityille päällystekivituotteille (betoniset päällystekivet, -laatat ja -reunakivet sekä luonnonkivestä tehdyt päällystelaatat, noppa ja nupukivet ja reunakivet) eri käyttökohteissa sekä niille ominaisuuksille asetetut vähimmäisvaatimustasot tai luokat.
Komitea: ISO/TC 300 (Solid recovered materials, including solid recovered fuels)
Alkuperä: ISO
Määräpäivä: 2026-11-16
LaajennaSupista
 
This document specifies a method for the simultaneous determination of the fluorine, chlorine, bromine, and sulphur content in solid recovered fuels by oxidative pyrohydrolytic combustion at (1 050 ± 50) °C, followed by ion chromatography. The method is applicable for the determination of mass fractions = 10 mg/kg of each element based on dry matter. The upper limit and exact concentration range covered depends on the blank levels of the instrumentation and the capacity of the chromatographic separation column used for determination. NOTE 1 Simultaneous determination of iodine content is possible but currently not validated. NOTE 2 Other detection methods can be applied if validated.
Toimialayhteisö: SFS Suomen Standardit
Komitea: ISO/TC 94/SC 15 (Respiratory protective devices)
Alkuperä: ISO
Määräpäivä: 2026-11-16
LaajennaSupista
 
This document specifies the requirements for respiratory protective devices for use by workers during response to incidents involving chemical, biological, radiological or nuclear (CBRN) materials used with intent to cause harm or in cases of accidental release outside traditional hazardous materials response categories. For the purposes of this specification, all incidents described here are named CBRN incidents. This document is applicable to RPD for use by personnel in the following roles: — First responders: including police, fire service, emergency medical, search and rescue, sampling and detection teams. — Workers needed for specific roles during response (utility, transportation, service continuity). — Medical personnel working with casualties of CBRN incidents. — Responders to release incidents involving nuclear materials. — Non-emergency but CBRN-related roles. — Workers in need of protection during escape from a CBRN or radiological release incident. — Workers in need of protection from nuclear materials. The requirements for RPD use by the following groups are not addressed by this document: — Military personnel outside of first responder roles. — Children. — Animals. Requirements for the following are not covered by this document: — Collective protection systems including ventilated casualty/body bags. — Methods of and criteria for decontamination of RPD. — Disposal of used or contaminated equipment. This document is focused on respiratory protection requirements, but it is recognised that CBRN supplied breathable gas RPD are always used as part of an ensemble with protective clothing. The total ensemble effectiveness is not covered by this document.
Toimialayhteisö: SFS Suomen Standardit
Komitea: ISO/IEC JTC 1/SC 36 (Information technology for learning, education and training)
Alkuperä: ISO
Määräpäivä: 2026-11-16
LaajennaSupista
 
This document defines a maturity model and gives guidance on the evaluation criteria and methodology for evaluation of the quality of online learning across four key practice domains:
- online learning environment;
-  learner support;
-  learning and assessment tasks;
-  learning resources.
 
The scope of this document includes the following:
— maturity model definition;
— principles of evaluation questionnaires for maturity model components; — guidance for a maturity model evaluation method.
Toimialayhteisö: SFS Suomen Standardit
Komitea: ISO/IEC JTC 1/SC 7 (Software and systems engineering)
Alkuperä: ISO
Määräpäivä: 2026-11-16
LaajennaSupista
 
This document: — specifies the required processes implemented in the engineering activities that result in requirements for systems and software products (including services) throughout the life cycle; — provides guidelines for applying the requirements and requirements-related processes described in ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207; — specifies the required information items produced through the implementation of the requirements processes; — specifies the required contents of the required information items; — provides guidelines for the organization of the required and related information items. This document is applicable to: — those who use or plan to use ISO/IEC/IEEE 15288 and ISO/IEC/IEEE 12207 on projects dealing with human-made systems, software-intensive systems, software and hardware products, and services related to those systems and products, regardless of the project scope, product(s), methodology, size or complexity; — those who use or plan to use ISO/IEC/IEEE 15289 on projects dealing with human-made systems, software-intensive systems, software and hardware products and services related to those systems and products, regardless of the project scope, product(s), methodology, size or complexity.
Toimialayhteisö: SFS Suomen Standardit
Komitea: ISO/TC 24/SC 4 (Particle characterization)
Alkuperä: ISO
Määräpäivä: 2026-11-17
LaajennaSupista
 
This document describes methods for calibrating the optical components and flowrates of a BFPC, which is used to count microbiological (or autofluorescent) particles suspended in a known volume of air. Routine calibration of a BFPC focuses on maintaining the long-term technical integrity of optical measurements, spanning from the initial product development through the instruments's expected lifetime. The measurement principle of a BFPC is single particle laser-induced fluorescence (SP-LIF). Depending on the BFPC model, single-particle light scattering (SP-LS) measurements may also be performed. The particle size range measured by a BFPC typically span from 0,3 µm to 100 µm in diameter. The following parameters are within the scope of this document: Fluorescence intensity — Light scattering intensity (if applicable) — Flow rate (s) False counts — Counting efficiency of BFPC False positive rates — Counting efficiency of SP-LS system (if applicable)
Komitea: ISO/TC 22/SC 36 (Safety and impact testing)
Alkuperä: ISO
Määräpäivä: 2026-11-17
LaajennaSupista
 
This document defines terms relating to the classification of road vehicle collisions, concentrating on configuration aspects. This document focuses on terminology for classification of vehicle-vehicle collisions and vehicle-obstacle collisions and does not include collisions with vulnerable road users. NOTE Additional terms and definitions on road vehicle accidents are given in ISO 12353-1.
Toimialayhteisö: SFS Suomen Standardit
Komitea: ISO/TC 94/SC 15 (Respiratory protective devices)
Alkuperä: ISO
Määräpäivä: 2026-11-17
LaajennaSupista
 
This document specifies the requirements for respiratory protective devices for use by workers during response to incidents involving chemical, biological radiological or nuclear (CBRN) materials used with intent to cause harm or in cases of accidental release outside traditional hazardous materials response categories. For the purposes of this document, all incidents described here are named CBRN incidents. This document is applicable to RPD for use by personnel in the following roles: — First responders: including police, fire service, emergency medical, search and rescue, sampling and detection teams. — Workers needed for specific roles during response (utility, transportation, service continuity). — Medical personnel working with casualties of CBRN incidents. — Responders to release incidents involving nuclear materials. — Non-emergency but CBRN-related roles. — Workers in need of protection during escape from a CBRN or radiological release incident. — Workers in need of protection from nuclear materials. The requirements for RPD use by the following groups are not addressed by this document: — Military personnel outside of first responder roles. — Children. — Animals. Requirements for the following are not covered by this document: — Collective protection systems including ventilated casualty/body bags. — Methods of and criteria for decontamination of RPD. — Disposal of used equipment. This document is focused on respiratory protection requirements, but it is recognised that CBRN RPD are always used as part of an ensemble with protective clothing. The total ensemble effectiveness is not covered by this document.
Komitea: ISO/TC 212 (Medical laboratories and in vitro diagnostic systems)
Alkuperä: ISO
Määräpäivä: 2026-11-18
LaajennaSupista
 
This document specifies requirements and gives recommendations for next generation sequencing (NGS) workflows for in vitro diagnostics and biomedical research. This document covers the pre-examination processes including human DNA (somatic and germline) isolation, sequencing library preparation, sequencing, sequence analysis and reporting of the examined sequences for diagnostic purposes from isolated DNA from, e.g. formalin-fixed and paraffin embedded tissues, fresh frozen tissues, fine needle aspirates (FNA), whole blood, circulating tumour cells (CTCs), exosomes and other extracellular vesicles, circulating cell free DNA from plasma, and DNA from saliva. NOTE 1 Typical applications include, but are not limited to, NGS for oncology, pharmacogenomics and clinical genetics; approaches include panels (e.g. disease panels, exome panels, target gene panels and in silico panels), exome and whole genome sequencing, as well as certain epigenetic and certain single-cell analyses. This document addresses in vitro diagnostic examinations including laboratory developed examinations and is applicable to medical laboratories, molecular pathology laboratories and molecular genetic laboratories, in vitro diagnostic developers and manufacturers, biobanks and institutions and organizations performing biomedical research or sequencing services. This document is not applicable for in situ sequencing, DNA-mediated protein sequencing, forensic sequencing, sequencing of pathogens or microorganisms and microbiome analysis. NOTE 2 International, national or regional regulations or requirements or multiples of them can also apply to specific topics covered in this document.
Komitea: ISO/TC 212 (Medical laboratories and in vitro diagnostic systems)
Alkuperä: ISO
Määräpäivä: 2026-11-18
LaajennaSupista
 
This document specifies requirements and gives recommendations for next generation sequencing (NGS) workflows for in vitro diagnostics and biomedical research. This document covers the pre-examination processes including human RNA isolation, sequencing library preparation, sequencing, sequence analysis and reporting of the examined sequences for diagnostic purposes from isolated RNA from, e.g. formalin-fixed and paraffin embedded tissues, fresh frozen tissues, fine needle aspirates (FNA), whole blood, circulating tumour cells (CTCs), exosomes and other extracellular vesicles, and circulating cell free RNA from plasma. NOTE 1 Typical applications include, but are not limited to, NGS for oncology and clinical genetics, certain single-cell analyses. This document addresses in vitro diagnostic examinations including laboratory developed examinations and is applicable to medical laboratories, molecular pathology laboratories and molecular genetic laboratories, in vitro diagnostic developers and manufacturers, biobanks as well as institutions and organizations performing biomedical research or sequencing services. This document is not applicable for in situ sequencing, forensic sequencing, sequencing of pathogens or microorganisms and microbiome analysis. NOTE 2 International, national or regional regulations or requirements or multiples of them can also apply to specific topics covered in this document.
Komitea: CEN/TC 54 (Unfired pressure vessels)
Alkuperä: CEN
Määräpäivä: 2026-11-19
LaajennaSupista
 
1.1 This document specifies the requirements for materials, design, manufacture, testing inspection, safety equipment configuration and documentation (including instructions for first operation), for commonly-used types of gas-loaded accumulators and pressure vessels used to provide additional gas capacity for fluid power applications (see 1.2). 1.2 This document applies to the following types of components, defined as the pressure-containing envelope of gas-loaded accumulators: - bladder type; - diaphragm type; - piston type; - transfer type; - pressure vessels used to provide additional gas capacity. They consist of one or several parts joined together by a variety of mechanical means and by welding. 1.3 This document applies to gas-loaded accumulators which operate with the following conditions: - subject to an internal gauge pressure greater than 0,5 bar; - working temperature not lower than –50 °C and not higher than +200 °C; - containing all liquids and gases as defined in the European Legislation on Pressure Equipment, see Note. NOTE When the accumulator contains Group 1 liquids or gases, consideration relating to risks other than those required by the European Legislation on Pressure Equipment are not covered by this document and will be assessed separately.
Komitea: CEN/TC 250/SC 3 (Eurocode 3 - Design of steel structures)
Alkuperä: CEN
Määräpäivä: 2026-11-19
LaajennaSupista
 
1.1 Scope of EN 1993 4 1 (1) prEN 1993 4 1 provides rules for the structural design of steel silos of circular or rectangular plan-form, being free-standing (on ground) or supported on a structural framework (elevated). (2) prEN 1993 4 1 is applicable to silos constructed from isotropic rolled plates that are stiffened or unstiffened, from corrugated sheeting that is stiffened or unstiffened and from flat or corrugated plates assembled into box structures of different geometries. It applies to vertical walls, hoppers, roof structures, transition junctions and support structures. (3) prEN 1993 4 1 does not apply to storage vessels for silage and haylage, or to the storage of materials that are not free-flowing (see EN 1991 4). This Part 4-1 also does not cover: - resistance to fire; - cylindrical silos with internal subdivisions; - internal structures within a single silo (except for internal ties, as defined in 12.5); - silos with capacity less than 100 kN (10 tonnes); - hoppers that are supported on a structural framework; - cases where special measures are necessary to limit the consequences of accidents. (4) This document is applicable to silos within the following dimensional limits (see EN 1991-4): - Silo aspect ratio hb/dc < 10 - Silo total height hb < 70 m - Silo equivalent diameter dc < 60 m NOTE These dimensional limitations are more limited than those of EN 1991-4 which also applies to silos constructed from other materials. (5) Where this standard applies to circular planform silos, the geometric form is restricted to axisymmetric structures, but unsymmetrical actions on them and supports that induce forces in the silo structure that are not axisymmetric are included. (6) This part is concerned only with the requirements for resistance and stability of steel silos. For other requirements (such as operational safety, functional performance, fabrication and erection, quality control, details like man-holes, flanges, filling devices, outlet gates and feeders, etc.), see other relevant standards and information. (7) This part is concerned with both isolated silo structures and silos that are connected to others to form a battery of silos, but throughout this document the term silo refers to a single cell within a battery. (8) Provisions relating to special requirements of seismic design are provided in EN 1998 4, which complements or adapts the provisions of Eurocode 3 specifically for this purpose. (9) The structural design of supporting structures for the silo are dealt with in EN 1993 1 1. The supporting structure is deemed to consist of all structural elements beneath the bottom flange of the lowest ring of the silo (see Figure 1.1), though information on some forms of support structure is given in Clause 8 of this document. (10) Foundations in reinforced concrete for steel silos are dealt with in EN 1992 (all parts) and EN 1997 (all parts). 1.2 Assumptions (1) Unless specifically stated, the provisions of EN 1990, EN 1991 (all parts) and EN 1993 1 (all parts) apply. (2) The design methods given in EN 1993 4 1 are applicable if: - the execution quality is as specified in EN 1090 2, and - the construction materials and products used are as specified in the relevant parts of EN 1993 (all parts), or in the relevant material and product specifications. Figure 1.1 - Terminology used in silo structures ...