ISO 7138-2017 PDF

Full title and description

ISO 7138:2017 — Cross‑country skis — Determination of mass and location of balance point. This International Standard specifies laboratory measurement methods for determining the mass of cross‑country skis and the location of their balance point (centre of mass) to ensure comparable, repeatable results when manufacturer or laboratory data are published.

Abstract

ISO 7138:2017 defines standardized laboratory procedures for measuring the mass of cross‑country skis and locating their balance point. The procedures are intended to provide comparable measurement results; the standard does not attempt to assess how the measured values affect ski performance or quality.

General information

• Status: Published (International Standard, confirmed).
• Publication date: November 2017 (Edition 2, 2017).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 97.220.20 (snow sports equipment / cross‑country skiing).
• Edition / version: Edition 2 (2017).
• Number of pages: 3 (concise laboratory procedure document).

Scope

This standard specifies laboratory measurement methods to determine (a) the mass of cross‑country skis and (b) the position of the balance point (centre of mass) along the ski. The scope covers test specimen preparation, measurement equipment and conditions, measurement procedure, and reporting of results. ISO 7138:2017 is intended to make laboratory measurement results comparable between manufacturers and testing bodies; it is not intended to evaluate or prescribe ski performance characteristics based on the measured values.

Key topics and requirements

• Definitions and terms related to mass and balance point for cross‑country skis.
• Specification of test specimen condition and preparation before measurement.
• Required measurement equipment and its calibration/accuracy tolerances for mass and balance point determination.
• Step‑by‑step laboratory procedure to determine ski mass and locate the longitudinal balance point (centre of mass).
• Reporting requirements: how to record and present measured mass, balance point location (relative to a defined reference), units, and test conditions.
• Notes on repeatability, reproducibility and interpretation limits (standard does not prescribe performance thresholds).

Typical use and users

Intended users include cross‑country ski manufacturers, quality control and R&D laboratories, test houses, sports equipment certification bodies, retailers who publish specification data, and researchers studying ski design. The standard is used to produce comparable specification sheets, support product development and perform consistent quality checks during production or independent testing.

Related standards

ISO 7138:2017 replaces the earlier ISO 7138:1984 (withdrawn). Related work items and committees include ISO/TC 83 (Sports, playground and gymnastic equipment) and its subcommittees on ski and related equipment. Other ISO standards addressing ski equipment, binding settings and safety testing may be used alongside ISO 7138 where broader test or safety requirements are needed.

Keywords

cross‑country skis; ski mass; balance point; centre of mass; laboratory measurement; ski testing; ISO 7138; ISO/TC 83; measurement procedure; reporting requirements.

FAQ

Q: What is this standard?

A: ISO 7138:2017 is an International Standard that specifies laboratory methods for determining the mass of cross‑country skis and the location of their balance point (centre of mass).

Q: What does it cover?

A: It covers specimen preparation, required measurement equipment and accuracy, the step‑by‑step procedure to measure mass and locate the balance point along the ski, and how results should be reported to ensure comparability between laboratories and manufacturers.

Q: Who typically uses it?

A: Ski manufacturers, independent test laboratories, product certification bodies, researchers and retailers who publish technical specifications for cross‑country skis.

Q: Is it current or superseded?

A: The 2017 edition (Edition 2) is the current published version and replaced the original 1984 edition. The 2017 edition was reviewed and confirmed as current during standard review cycles.

Q: Is it part of a series?

A: ISO 7138 is a standalone standard focused specifically on mass and balance point measurement for cross‑country skis, but it is part of the broader portfolio of ISO/TC 83 standards covering sports and ski equipment testing and safety.

Q: What are the key keywords?

A: Cross‑country skis, mass, balance point, centre of mass, laboratory measurement, test procedure, ISO 7138, ski testing.