Behind the elegant finishes of interior walls lies a structural framework that carries significant safety implications if compromised. Studs, the vertical components of light gauge steel (LGS) framing systems, serve as the backbone of partition walls, with their material selection, specifications, and installation directly impacting a building's structural safety and durability.

Referred to as "スタッド" in Japanese, studs form the vertical members in LGS framing systems. These components work in conjunction with horizontal runners (top and bottom tracks) to create load-bearing wall structures. In demanding construction projects, particularly public works, studs must comply with Japanese Industrial Standards (JIS), which specify material properties, dimensions, and mechanical performance requirements.

The JIS standard categorizes studs into five primary specifications, each suited for different wall heights:

The numbering system refers to the stud's cross-sectional width, with the 65 and 100 series being most commonly used in practice. The 50 series typically serves as supplementary framing for exterior walls.

Studs are manufactured in two primary cross-sectional configurations, each with distinct characteristics:

As the only JIS-compliant option, C-shape studs dominate public works projects. Their installation requires additional components like spacers and bracing for structural stability. Advantages include:

• Standardized compliance with rigorous JIS specifications
• Superior performance in fire resistance and sound insulation applications
• Proven reliability in demanding construction environments

Rectangular or square-profile studs offer simplified installation without JIS certification. While not permitted in regulated projects, they provide:

• Lower material and labor costs
• Faster installation with fewer components
• Increased cavity space for utility routing

Public construction mandates C-shape studs due to:

• Compliance with Ministry of Land, Infrastructure, Transport and Tourism specifications
• Enhanced safety assurance for high-occupancy buildings
• Broad applicability across diverse construction scenarios

Despite exclusion from public projects, angle-shape studs remain relevant for:

• Cost-sensitive private developments
• Projects with accelerated timelines
• Applications requiring extensive utility integration

Proper stud installation follows a standardized sequence:

1. LGS Framework Assembly: Layout marking precedes track installation, followed by vertical stud placement with appropriate bracing.
2. Drywall Application: Gypsum board installation with staggered joints and optional acoustic/thermal insulation.
3. Utility Integration: Mechanical/electrical routing through stud cavities with protective measures.
4. Surface Finishing: Joint treatment, sanding, and final decorative application.

Demountable partition systems offer rapid space division options:

• Aluminum: Lightweight aesthetic solutions for office environments
• Steel: Enhanced privacy and sound control configurations
• Glass: Transparent divisions maintaining visual connectivity

The selection of appropriate stud systems remains fundamental to ensuring structural integrity in interior construction. Proper specification and installation practices directly contribute to building safety and longevity.