ISO 1464:2018

Overview

ISO 1464:2018 is an international standard published by the International Organization for Standardization (ISO) that specifies clearance dimensions for tripod jacks used in aerospace applications. It focuses on defining the minimum clear space beneath an aircraft's main jacking points to accommodate tripod jacks safely and efficiently. This ensures proper clearance between the jacks and adjacent aircraft structures during maintenance or lifting operations.

The standard provides design aids for engineers and aircraft manufacturers but does not define all jack clearance dimensions comprehensively. Instead, it is intended as a guideline to be complemented by actual jack dimensions where critical clearances are involved, ensuring safety and functionality at all times.

Key Topics

• Minimum Clearance Space: Specifies the shape and dimensions of the safe clearance zone beneath aircraft main jacking points - modeled as a truncated right pyramid with an equilateral triangular base and edges at a 30° angle to the vertical axis.

• Clearance Geometry:

  • The height of the clearance pyramid must extend to the airplane jacking pad at maximum airplane height before jacking.
  • The base leg radius must be at least 0.3 times the maximum extended jack height to guarantee jack stability.
  • If the jacking pad is embedded in the aircraft surface, an additional cylindrical clearance space on top of the pyramid is required, referencing ISO 43 for exact pad configurations.

• Load Capacity Categories: The standard sets clearance dimensions based on jack load capacity, ranging from light loads (<44.5 kN) to heavy aircraft jacks (up to 1,600 kN). For example:

  • For jacks under 44.5 kN, the apex circle diameter is 152.4 mm (6 in).
  • For jacks between 1,112 and 1,600 kN, the diameter increases to 381 mm (15 in).

• Design Aid Role: ISO 1464:2018 should be used in the initial design and assessment phases for ground equipment and aircraft jacking interfaces but requires validation by using actual tripod jack measurements.

Applications

• Aircraft Maintenance Facilities: Helps maintenance engineers design safe ground support equipment setups to prevent accidental contact between tripod jacks and aircraft structures during lifting.

• Aircraft Manufacturers: Guides the structural design of jacking points to provide adequate clearance for commonly used tripod jacks, reducing risk during routine servicing.

• Ground Equipment Designers: Provides manufacturers of tripod jacks with clear geometric boundaries to optimize jack design for use across various aircraft sizes and capacities.

• Safety Compliance: Assists regulatory bodies and operators in ensuring that jacking operations meet internationally recognized clearance standards, minimizing risk of structural damage or injury.

Related Standards

• ISO 43 – Aircraft - Jacking Pads: Defines detailed requirements for aircraft jacking pads, which ISO 1464 references for embedded pad configurations.

• ISO/IEC Directives: Ensure that ISO 1464 follows international procedures for technical standard development, including patent declarations and conformity assessment terms.

• Aerospace Ground Support Equipment Standards: Complement ISO 1464 by addressing other mechanical interfaces and safety requirements in aircraft servicing.

This standard is essential for aerospace engineers, maintenance teams, and equipment manufacturers who seek to ensure optimal clearance and safety in aircraft jacking operations while aligning with international best practices. By adhering to ISO 1464:2018, stakeholders can streamline design processes and reduce operational risks during aircraft lifting tasks.