ISO 3348-1975 rus PDF

Full title and description

ST ISO 3348-1975 (rus) — Wood — Determination of impact bending strength. This product page describes the international ISO method, originally published in 1975, for measuring the impact (dynamic) bending strength of wood test pieces using a pendulum-type impact tester; the entry shown as “rus” indicates a Russian-language interest or listing but the original ISO publication languages are English and French.

Abstract

Specifies a procedure for determining impact bending strength of wood by breaking a test piece in cross-sectional bending with a pendulum impact testing machine, recording the work absorbed and the form of fracture; references sampling and moisture-determination standards (ISO 3129 and ISO 3130). The original 1975 standard has been withdrawn and later superseded by a modern test in the ISO 13061 series.

General information

• Status: Withdrawn.
• Publication date: 1975 (Edition 1, published August 1975).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 79.040 — Wood, sawlogs and sawn timber.
• Edition / version: Edition 1 (1975).
• Number of pages: 2 pages (short technical method).

Scope

Describes a single, standardized dynamic bending test for small clear specimens of wood using a pendulum impact testing machine. The procedure sets specimen orientation (radial or tangential bending permitted), support geometry, measurement of cross-sectional dimensions and moisture content prior to testing, recording of work absorbed by fracture and classification of fracture form (e.g., conchoidal). The standard cross-references ISO 3129 (sampling and general requirements) and ISO 3130 (moisture content determination). Note: the 1975 standard has been withdrawn and its functionality incorporated into later ISO wood-testing parts.

Key topics and requirements

• Test principle: determination of impact bending strength by single-impact cross-sectional bending using a pendulum impact machine.
• Specimen preparation: specified dimensions, orientation (radial or tangential), and conditioning to a measured moisture content.
• Measurement and reporting: work absorbed by the specimen, form of fracture (conchoidal or chipped), and moisture-corrected results.
• Normative references: cross-references to ISO 3129 and ISO 3130 for sampling and moisture determination.
• Lifecycle note: withdrawn (1975 edition) and replaced in practice by updated test methods in the ISO 13061 series (see related standards).

Typical use and users

Used historically by timber-testing laboratories, research institutions, inspection bodies and timber product manufacturers to determine impact behaviour of small clear wood specimens for material characterization, comparison of species, quality control and research on dynamic fracture mechanics of wood. Today laboratories generally use newer ISO 13061 series methods or national equivalents for modern reporting.

Related standards

Directly related and relevant documents include ISO 3129 (wood — sampling methods and general requirements), ISO 3130 (wood — determination of moisture content for physical and mechanical tests) and the successor test methods in the ISO 13061 series (for example ISO 13061-10:2017 and related parts covering mechanical testing of small clear wood specimens). Historical national test standards for timber testing (e.g., BS and other regional standards) are often used alongside or as references.

Keywords

impact bending strength; wood testing; pendulum impact test; dynamic bending; ISO 3348:1975; timber; specimen; moisture content; fracture form; withdrawn; ISO 13061.

FAQ

Q: What is this standard?

A: ISO 3348:1975 is an international test method that specified how to determine the impact (dynamic) bending strength of wood using a pendulum impact testing machine; the 1975 edition is withdrawn.

Q: What does it cover?

A: It covers specimen orientation and dimensions, conditioning and moisture measurement, the pendulum impact test procedure, measurement of work absorbed and reporting of fracture form and results, with normative references to ISO 3129 and ISO 3130.

Q: Who typically uses it?

A: Timber and wood-testing laboratories, materials researchers, standards bodies and manufacturers concerned with mechanical properties of wood historically used this method for comparative and quality-assurance testing. Today, users typically refer to newer ISO 13061 series methods.

Q: Is it current or superseded?

A: The 1975 edition of ISO 3348 has been withdrawn; its role in wood mechanical testing has been superseded by later ISO standards in the ISO 13061 series (for example ISO 13061-10:2017).

Q: Is it part of a series?

A: It belongs conceptually to the family of ISO test methods for small clear wood specimens and timber (cross-references include ISO 3129 and ISO 3130) and its modern equivalents are found in the ISO 13061 series covering mechanical testing of wood.

Q: What are the key keywords?

A: Impact bending strength; pendulum impact; dynamic bending; wood; timber testing; ISO 3348; specimen conditioning; moisture content; fracture form.