Eatons TOLCO Enhances Earthquake Safety with Seismic Bracing

Earthquakes pose a significant threat not only to buildings but also to the internal equipment and systems within them, leading to substantial economic losses and safety hazards. The challenge lies in minimizing human casualties and property damage during seismic events. Eaton's TOLCO seismic bracing solutions offer a reliable safeguard against such disasters.

For over six decades, Eaton's TOLCO seismic bracing solutions have been trusted by industries specializing in mechanical, electrical, and fire protection systems. The company provides innovative, patented solutions for cable bracing and rigid bracing, along with comprehensive seismic engineering services spanning from pre-bid stages to inspections.

Why Choose Eaton TOLCO Seismic Bracing?

Eaton TOLCO stands out as a preferred choice across industries due to its superior performance and end-to-end services:

• Innovative patented technology: Ensures leading product performance and efficient installation.
• Full-spectrum engineering services: A dedicated seismic engineering team provides support from design to on-site implementation.
• Comprehensive product portfolio: Includes solutions for cable trays, strut systems, pipe supports, and vibration isolation systems.

Comprehensive Seismic Bracing Solutions

Eaton offers a complete range of seismic bracing solutions for diverse applications:

• Cable trays: Protect electrical cables from damage and short circuits during earthquakes.
• Strut systems: Provide flexible support structures for equipment and piping.
• Pipe supports: Maintain stability in piping systems to prevent ruptures and leaks.
• Vibration isolation systems: Reduce equipment vibration and noise while extending service life.

The Critical Role of Seismic Bracing: Compliance, Safety, and Economics

Seismic bracing serves not only as a safety measure but also addresses regulatory requirements and economic considerations:

1. Regulatory compliance: Mandated by building codes including:
   • International Building Code (IBC)
   • ASCE 7 (American Society of Civil Engineers)
   • NFPA 13 (National Fire Protection Association)
2. Economic protection: Over 50% of earthquake-related financial losses stem from non-structural component damage.
3. Critical system protection: Safeguards essential systems including:
   • Fire sprinkler systems
   • Refrigeration systems
   • Electrical systems
   • HVAC systems
   • Plumbing systems
4. Risk mitigation: Required by risk management entities and insurers such as FM Global.

According to US Geological Survey data, approximately 20,000 earthquakes occur globally each year, averaging 55 daily. Historical records indicate about 16 major earthquakes annually, including fifteen magnitude 7 events and one magnitude 8 or higher.

Principles of Seismic Bracing

Seismic bracing connects equipment to building structural elements, enabling synchronized movement during earthquakes. This requires bracing in two directions:

• Lateral bracing: Perpendicular to system installation
• Longitudinal bracing: Parallel to system installation

Bracing systems incorporate tie rod stiffeners to maintain structural integrity. A complete seismic bracing assembly consists of three components:

1. System support (connecting to structural elements)
2. Bracing member (cables, channels, or pipes)
3. Structural connector (linking to non-structural components)

Types of Cable Bracing

Seismic bracing systems fall into two categories, both applicable to mechanical, electrical, and piping applications:

• Cable bracing: Operates under tension, requiring two opposing support components per location.
• Rigid bracing: Functions under both tension and compression, needing only one support component per location, though subject to drop length limitations.

B-Line Series: Professional Seismic Engineering Services

Navigating seismic bracing standards and specifications can be complex. Eaton's B-Line series seismic engineering services team provides expert guidance from pre-bid through inspection phases, ensuring compliant solutions.

Services include:

• Seismic engineering consultations
• Continuing education (CEU/PDH) training
• Project reviews for specifications and designs
• Drawing and model reviews
• Engineering calculations and testing
• PE-stamped submission packages
• Material takeoffs and bill of materials

B-Line Series Cable Bracing Kits: Installation Efficiency

Compared to conventional methods, B-Line seismic bracing cable kits reduce installation time by 50% through:

• Pre-cut 10' and 20' cable options
• Color-coded sizing labels
• Tool-free installation fixtures
• Open-web beam compatibility without drilling
• Independent laboratory testing and PE-approved designs

Seismic Bracing for CPVC Piping

Chlorinated polyvinyl chloride (CPVC) piping, widely used in mechanical and fire protection systems for its chemical resistance, requires specialized seismic bracing similar to iron pipe size (IPS) standards. Traditional bracing systems designed for metal pipes may compromise CPVC systems during seismic events, necessitating purpose-designed solutions.

Vibration Isolation Considerations

Inadequate vibration control accelerates equipment failure, compromises performance, and generates noise. Beyond operational vibrations from motors and fans, seismic activity can introduce destructive vibrations that propagate through structures. Proper isolation becomes particularly critical for CPVC systems, where conventional restraints may prove inadequate.

With appropriate seismic bracing design, CPVC systems can be reliably implemented across industrial applications while meeting all safety and performance requirements.