Overview
ISO 19426-3:2018 - Structures for mine shafts - Part 3: Sinking stages defines the design loads and design procedures for the structural design of sinking stages and their components. The standard adopts a limit states design philosophy and is focused on structural reliability rather than operational safety or stage layout. It explicitly excludes the design of stage ropes and sheaves (rope sizing is covered by other standards).
Key topics and requirements
- Scope and exclusions
- Applies to structural design of sinking stages and stage components.
- Does not cover stage ropes/sheaves, operational safety, or stage layout.
- Design philosophy
- Limit states approach with partial factors and load combinations.
- Materials
- Requirements and references for structural steel, high‑strength steel, and aluminium alloys (preferred alloy notes included).
- Load types covered
- Permanent loads (stage self‑weight and fixed equipment).
- Imposed loads including stage deck loads (uniform and concentrated), jumbo and lashing unit loads, stage jack and skid loads, canopy, kibble guide, temporary supports, blast loads, guard railing loads and special loads.
- Examples given: uniformly distributed deck load of 3 000 N/m² (or 1 500 N/m² where no concrete build‑up) and concentrated deck load of 5 000 N.
- Emergency loads (e.g., emergency rope and impact loads).
- Design procedures
- Definition of design loads, load combinations and load reversal.
- Guidance on replaceable members, impact energy design of top decks, and deflection limitations.
- Informative annexes
- Load factors and combinations (Annex A), examples for jumbo and lashing unit loads (Annexes B & C), and stage jack load examples (Annex D).
Applications and users
ISO 19426-3 is intended for professionals involved in mine shaft sinking and structural design:
- Mining and shaft design engineers
- Structural engineers designing sinking stages, decks and support members
- Equipment manufacturers (stage components, decks, jacks)
- Contractors and fabricators responsible for stage construction
- Regulators and certifiers reviewing structural safety and compliance
Typical applications include structural verification of sinking stage decking and framing, selection of member sizes and materials, impact and deflection checks for top decks, and design documentation for tendering and construction.
Related standards
Relevant references and complementary standards cited by ISO 19426-3:2018:
- ISO 19426-1 (Vocabulary)
- ISO 22111 (Bases for design of structures)
- ISO 2394 (General principles on reliability for structures)
- EN standards for steel and aluminium material and design (e.g., EN 10025 series, Eurocode 9 references)
Keywords: ISO 19426-3:2018, sinking stages, mine shafts, design loads, limit states design, stage deck load, structural steel, aluminium alloys, mining shaft design.