Prefabricated timber formwork beams - Requirements, classification and assessment

This European Standard specifies classification, requirements and assessment procedures for prefabricated timber formwork beams. It also gives information on production control requirements.
Prefabricated timber formwork beams are intended for use in falsework and formwork and to be loaded in the direction of the beam depth.
They are of glued I-shaped construction consisting of two identical flange members of solid timber connected by a single web of wood based material with beam depths of 160 mm, 200 mm and 240 mm, connected by or a lattice of solid timber members with a beam depth of 240 mm beam depth.

Industriell gefertigte Schalungsträger aus Holz - Anforderungen, Klassifizierung und Nachweis

Diese Europäische Norm gibt die Klassifizierung, die Anforderungen und die Nachweisverfahren für industriell gefertigte Schalungsträger aus Holz an. Sie gibt weiterhin Informationen über die Anforderungen an die Produktionsüberwachung an.
Industriell gefertigte Schalungsträger aus Holz sind für die Verwendung in Traggerüsten und Schalungen vorgesehen und werden in Richtung der Trägerhöhe belastet.
Die Träger haben eine I-förmig verleimte Konstruktion bestehend aus zwei identischen Gurten aus Vollholz, die durch einen Steg aus Holzwerkstoff verbunden sind, mit Trägerhöhen von 160 mm, 200 mm und 240 mm, oder die durch ein Gitter aus Vollholzstreben verbunden sind mit einer Trägerhöhe von 240 mm.

Poutrelles de coffrage préfabriquées en bois - Exigences, classification et évaluation

La présente Norme européenne spécifie la classification, les exigences et les modes opératoires d'évaluation pour les poutrelles de coffrage préfabriquées en bois. Elle fournit également des informations sur les exigences du contrôle de la production.
Les poutrelles de coffrage préfabriquées en bois sont destinées à être utilisées dans les échafaudages d'étaiement et les coffrages, et à recevoir une charge dans le sens de leur hauteur.
Elles sont collées selon une construction en forme de   se composant de deux ailes identiques de bois dur reliées par une âme en matériau à base de bois avec des hauteurs de poutrelles de 160 mm, 200 mm et 240 mm, ou par un triangle constitué d'éléments en bois dur présentant une hauteur de poutrelle de 240 mm.

Predizdelani leseni opažni nosilci - Zahteve, razvrščanje in dokazovanje

General Information

Status
Published
Publication Date
27-Aug-2002
Withdrawal Date
27-Feb-2003
ICS
91.220 - Construction equipment
Technical Committee
CEN/TC 53 - Temporary works equipment
Drafting Committee
CEN/TC 53/WG 11 - Prefabricated formwork beams
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
04-Mar-2024
Completion Date
14-Apr-2025
Ref Project
SIST EN 13377:2002 - Prefabricated timber formwork beams - Requirements, classification and assessment

Overview

EN 13377:2002 is a CEN product standard for prefabricated timber formwork beams used in falsework and formwork. It specifies the classification, requirements and assessment procedures for I‑shaped glued timber beams loaded in the direction of the beam depth. The standard also provides guidance on production control, prototype assessment, conformity evaluation and marking.

Key facts:

  • Beam types: panel web (Type P) and lattice web (Type L).
  • Typical beam depths: 160 mm, 200 mm and 240 mm (240 mm also used for lattice web).
  • Construction: two identical solid‑timber flanges joined by a wood‑based panel web or a lattice of solid timber struts.
  • Annexes include normative test and calculation methods (A–D) and informative guidance on site use and production inspection (E–F).

Key topics and technical requirements

  • Classification by web construction (P or L) and nominal depth (two digits = cm).
  • Material requirements
    • Solid timber flanges: minimum strength class C24 (EN 338).
    • Web materials: plywood to EN 636‑3, solid‑wood panels (prEN 13353) or other wood‑based materials that pass the wet–dry cyclic test (Annex D).
    • Adhesives: type I according to EN 301; glued finger joints to EN 385.
  • Dimensional tolerances for length, depth, flange width and web thickness; moisture content target ~12 ±2 %.
  • Structural properties: characteristic bending, shear and bearing resistances and stiffness (defined per class and verified by testing in Annex A and statistical evaluation in Annex B).
  • Prototype assessment & conformity: procedures for testing representative beams, statistical determination of characteristic values (5 % quantile, 75 % confidence) and issuing a statement of conformity.
  • Production control: minimum ongoing inspection requirements (Annex C) and procedures for batch testing and marking.

Applications

EN 13377 applies to the manufacture, design verification and procurement of prefabricated timber formwork beams used in:

  • Building and civil engineering formwork and falsework systems
  • Temporary works where loads act in the depth direction
  • Modular formwork suppliers and contractors seeking standardized performance

Who uses this standard

  • Beam manufacturers and quality managers (production control)
  • Structural and temporary works engineers (specification and design checks)
  • Test laboratories and conformity assessment bodies (prototype testing)
  • Contractors, procurement teams and site engineers (product selection and marking)

Related standards

Relevant cross‑references cited in EN 13377 include EN 338, EN 301, EN 385, EN 636‑3, EN 310, EN 319, EN 323, EN 408 and ENV 1995‑1‑1 (Eurocode 5) for design factors and material properties.

Keywords: EN 13377, prefabricated timber formwork beams, panel web, lattice web, classification, production control, prototype assessment, CEN.

Frequently Asked Questions

EN 13377:2002 is a standard published by the European Committee for Standardization (CEN). Its full title is "Prefabricated timber formwork beams - Requirements, classification and assessment". This standard covers: This European Standard specifies classification, requirements and assessment procedures for prefabricated timber formwork beams. It also gives information on production control requirements. Prefabricated timber formwork beams are intended for use in falsework and formwork and to be loaded in the direction of the beam depth. They are of glued I-shaped construction consisting of two identical flange members of solid timber connected by a single web of wood based material with beam depths of 160 mm, 200 mm and 240 mm, connected by or a lattice of solid timber members with a beam depth of 240 mm beam depth.

This European Standard specifies classification, requirements and assessment procedures for prefabricated timber formwork beams. It also gives information on production control requirements. Prefabricated timber formwork beams are intended for use in falsework and formwork and to be loaded in the direction of the beam depth. They are of glued I-shaped construction consisting of two identical flange members of solid timber connected by a single web of wood based material with beam depths of 160 mm, 200 mm and 240 mm, connected by or a lattice of solid timber members with a beam depth of 240 mm beam depth.

EN 13377:2002 is classified under the following ICS (International Classification for Standards) categories: 91.220 - Construction equipment. The ICS classification helps identify the subject area and facilitates finding related standards.

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Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.]RYDQMHIndustriell gefertigte Schalungsträger aus Holz - Anforderungen, Klassifizierung und NachweisPoutrelles de coffrage préfabriquées en bois - Exigences, classification et évaluationPrefabricated timber formwork beams - Requirements, classification and assessment91.220Gradbena opremaConstruction equipmentICS:Ta slovenski standard je istoveten z:EN 13377:2002SIST EN 13377:2002en01-december-2002SIST EN 13377:2002SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13377August 2002ICS 91.220English versionPrefabricated timber formwork beams - Requirements,classification and assessmentPoutrelles de coffrage préfabriquées en bois - Exigences,classification et évaluationIndustriell gefertigte Schalungsträger aus Holz -Anforderungen, Klassifizierung und NachweisThis European Standard was approved by CEN on 29 May 2002.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 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 Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2002 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13377:2002 ESIST EN 13377:2002

Test and calculation methods to establish structural parameters.13Annex B (normative)
Statistical analysis of test results for the calculation of the characteristic value.18Annex C (normative)
Minimum requirements for production control.19Annex D (normative)
Test procedures for beams with webs conforming to 5.2.2.c).21Annex E (informative)
Values for use in calculation for site use.24Annex F (informative)
Ongoing production inspection.26Bibliography.27SIST EN 13377:2002

inaccordance with EN 338:1995 shall be used.5 Performance requirements5.1 GeneralBeams shall conform to the requirements of this clause according to their class. Conformity with the requirementsshall be verified, see clauses 6 and 7, and manufacturing shall be subject to production control, see clause 8 andannex C.SIST EN 13377:2002
...

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EN 13377:2002は、プレハブ木材型枠ビームに関する欧州標準であり、プレハブ型枠ビームの分類、要求事項、評価手続きについて具体的に定めています。この標準は、特に型枠や仮設工事における使用を目的としており、ビームの深さの方向に荷重がかかる際の性能を確保するための基準となります。 この文書の強みは、プレハブ木材型枠ビームの構造と機能に関する明確な規定を提供している点です。ビームは、固体木材の二つの同一フランジメンバーと、木材ベースの材料で作られた単一ウェブによって構成されており、160 mm、200 mm、240 mmのビーム深さでの強度確認が可能です。このように、異なる深さのビームが規定されているため、さまざまな建設プロジェクトに柔軟に対応できます。 さらに、EN 13377:2002は生産管理の要求事項についても情報を提供しており、製品の品質を維持するためのプロトコルを定めています。この要求により、製造者は一貫した品質のプレハブ木材型枠ビームを提供できるため、建設現場での安全性と効率性が向上します。 プレハブ木材型枠ビームの使用は、作業の迅速化やコスト削減に寄与するだけでなく、持続可能な建築資材の使用を促進する点でも重要です。この標準が示す構造的要求は、環境に配慮した設計をサポートし、業界におけるイノベーションを後押しします。全体として、EN 13377:2002はプレハブ木材型枠ビームに関する重要な基準として、関連性が高く、工事の質を向上させるために欠かせない文書です。

SIST EN 13377:2002 문서는 조립식 목재 거푸집 빔에 대한 요구사항, 분류 및 평가 절차를 세부적으로 규정하고 있습니다. 이 표준은 조립식 목재 거푸집 빔의 사용 목적과 방향성에 대해 명확하게 설명하고 있으며, 이는 거푸집 및 가설구조물의 설치에 중요한 역할을 합니다. 이 표준의 주요 강점 중 하나는 거푸집 빔의 분류 및 요구 사항을 명확히 하고 있다는 점입니다. 이로 인해 사용자는 제품의 품질과 성능을 일관되게 평가할 수 있으며, 건설 현장에서의 안전성을 높이는 데 기여합니다. 또한, 다양한 빔 깊이에 대한 정보를 제공하여, 사용자가 프로젝트 요구사항에 맞는 적절한 제품을 선택할 수 있도록 합니다. 추가로, SIST EN 13377:2002는 생산 관리 요구 사항에 대해서도 상세히 설명하고 있습니다. 이는 제조업체가 제품의 일관성과 품질을 유지하기 위한 필수 요건을 준수할 수 있도록 돕습니다. 조립식 목재 거푸집 빔의 설계와 제작에 대한 명확한 지침을 제공함으로써, 업계 표준을 따르는 것이 얼마나 중요한지를 강조합니다. 전체적으로 EN 13377:2002 표준은 조립식 목재 거푸집 빔의 품질, 안전성 및 신뢰성을 보장하기 위해 필수적인 자료로, 실제 적용에 있어 매우 중요합니다.

Die Norm EN 13377:2002 befasst sich umfassend mit den Anforderungen, Klassifikationen und Bewertungsverfahren für vorgefertigte Holzstützenbalken, die insbesondere im Bereich Schalungen und Gerüstbau Anwendung finden. Der Geltungsbereich dieser Norm ist auf die genaue Definition und Standardisierung von Holzstützenbalken fokussiert, die eine wichtige Rolle in der Bauindustrie spielen, insbesondere beim Einsatz in der Bekleidungs- und Stützungsstruktur. Ein herausragendes Merkmal dieser Norm ist die detaillierte Klassifizierung der Produkte, die es ermöglicht, verschiedene Typen von Holzstützenbalken klar zu unterscheiden und ihre Charakteristiken zu verstehen. Die Anforderungen an die Materialeigenschaften gewährleisten, dass die Balken sowohl hinsichtlich ihrer strukturellen Integrität als auch ihrer langfristigen Leistungsfähigkeit in anspruchsvollen Anwendungen zuverlässig sind. Dies ist besonders wichtig in einer Branche, in der Sicherheit und Stabilität an erster Stelle stehen. Ein weiterer bedeutender Aspekt der EN 13377:2002 liegt in den Verfahren zur Produktionskontrolle, die den Herstellern eine klare Richtlinie an die Hand geben, um die Qualität und Konsistenz der vorgefertigten Holzstützenbalken sicherzustellen. Dieser Fokus auf Qualitätssicherung trägt entscheidend dazu bei, dass die Produkte den hohen Standards der Bauindustrie entsprechen. Die Norm behandelt spezifisch die Konstruktion der Holzstützenbalken, die aus zwei identischen Flanschgliedern aus Massivholz bestehen, die über einen einzigen Steg aus einem Holzwerkstoff verbunden sind. Die definierten Balkentiefen von 160 mm, 200 mm und 240 mm bieten Flexibilität für unterschiedliche Einsatzbereiche und Lastanforderungen, was die Anwendung der Norm in einer Vielzahl von Bauprojekten unterstützt. Insgesamt ist die EN 13377:2002 eine relevante und zukunftsorientierte Norm, die nicht nur den aktuellen Anforderungen der Bauwirtschaft Rechnung trägt, sondern auch zukünftige Entwicklungen im Bereich der vorgefertigten Holzstützenbalken berücksichtigt. Die klare Struktur und die umfassende Abdeckung der wichtigen Aspekte machen sie zu einem unverzichtbaren Dokument für Hersteller, Planer und Ingenieure im Bereich moderner Baupraktiken.

The EN 13377:2002 standard provides a comprehensive framework for the classification, requirements, and assessment of prefabricated timber formwork beams, ensuring consistency and quality in the construction industry. Its scope is notably relevant for professionals engaged in the design and implementation of falsework and formwork solutions, as it delineates specific loading conditions that these beams must endure, particularly when loaded in the direction of beam depth. One of the key strengths of this standard lies in its detailed classification system, which categorizes prefabricated timber formwork beams based on their structural specifications. This classification is crucial for engineers and builders, allowing them to make informed decisions regarding the selection and application of these beams in various construction scenarios. The emphasis on glued I-shaped construction enhances the beams' load-bearing capacity while promoting efficient material usage. Additionally, the standard addresses production control requirements, thereby ensuring that manufacturers adhere to specific quality benchmarks throughout the production process. This aspect enhances reliability and safety, which are critical in construction applications, minimizing the risks associated with inadequate formwork support. Furthermore, the dimensions specified within the standard, particularly the beam depths of 160 mm, 200 mm, and 240 mm, cater to diverse construction needs and preferences, offering flexibility to professionals in the field. The inclusion of lattice constructions for 240 mm beam depths further showcases innovative design options to accommodate varying project specifications. Overall, EN 13377:2002 stands out as an essential guideline for those involved with prefabricated timber formwork beams, providing a robust basis for quality assurance, structural integrity, and operational efficiency in construction practices. Its focus on classification, assessment, and production control contributes significantly to the standardization efforts within the industry, making it a relevant document for architects, engineers, and construction managers alike.

La norme EN 13377:2002, intitulée "Poutres de coffrage en bois préfabriquées - Exigences, classification et évaluation", établit un cadre clair et précis pour la classification, les exigences et les procédures d'évaluation des poutres de coffrage en bois préfabriquées. Ce document normatif est essentiel pour garantir la sécurité et la fiabilité des structures temporaires, telles que les coffrages et les échafaudages. Les forces de cette norme résident dans sa capacité à définir des exigences techniques détaillées. En précisant les dimensions des poutres, notamment les profondeurs de 160 mm, 200 mm et 240 mm, la norme assure une uniformité qui facilite le choix et l'utilisation adéquate des matériaux dans divers contextes de construction. De plus, la description des poutres en forme de I collées, avec des membres de flanc en bois massif connectés par une âme en matériau à base de bois, permet de mieux comprendre la structure et la résistance des poutres. Une autre force significative est l'inclusion des exigences de contrôle de production qui sont essentielles pour maintenir un niveau de qualité constant dans la fabrication des poutres de coffrage. Cela permet aux fabricants de s'assurer que leurs produits respectent les spécifications de la norme, renforçant ainsi la confiance des utilisateurs finaux dans la sécurité et la robustesse des poutres utilisées. La norme EN 13377:2002 est particulièrement pertinente dans le contexte actuel de construction durable et efficace. Avec l'augmentation de la demande de solutions de construction rapides et fiables, les poutres de coffrage en bois préfabriquées offrent une alternative viable aux matériaux traditionnels. Cela s’harmonise avec les tendances vers des méthodes de construction plus efficaces et respectueuses de l'environnement. En somme, la norme EN 13377:2002 joue un rôle clé dans le secteur de la construction en fournissant des directives précises sur la fabrication et l'utilisation des poutres de coffrage en bois préfabriquées. Son approche méthodologique en matière de classification et d'exigences de qualité positionne cette norme comme un outil indispensable pour les professionnels de la construction et les acteurs de l'industrie.