Explore how unitized and stick-built curtain wall systems function in modern high-rise construction. Understand product selection, installation, and code compliance.
Overview
Curtain wall systems define the architectural identity of commercial skyscrapers. These systems, while non-structural, serve as the critical interface between a building’s structure and the exterior environment, managing air, moisture, and thermal movement. In this article, we explore the leading curtain wall system types used in high-rise construction, their advantages, challenges, installation strategies, and code compliance requirements.
Types of Curtain Wall Systems
- Stick-Built: Assembled on-site, this traditional system is flexible and adaptable but more labor-intensive.
- Unitized: Factory-assembled modules delivered to site, reducing installation time and improving quality control.
- Structural Glazing: Frameless appearance with high aesthetic value, using silicone sealants and minimal visible metal.
Performance Criteria for High-Rise Curtain Walls
- Wind and structural load resistance per ASTM E330
- Air infiltration testing: ASTM E283
- Water penetration resistance: ASTM E331
- Fire propagation: NFPA 285
- Seismic drift accommodation
Quick Picks
- Best for Structural Glazing: SikaSil SG-20
- Best Curtain Wall Anchors: Steel Bracket Set
- Best Glazing Tape: Closed Cell Glazing Tape
Product Highlights
- SikaSil SG-20 Silicone Sealant – High-strength, weather-resistant sealant for structural glazing in curtain walls.
- Curtain Wall Steel Anchor Brackets – Pre-engineered steel brackets ideal for unitized panel anchoring.
- Closed Cell Glazing Foam Tape – Provides airtight seal around glazing perimeters. Ideal for high-rise facade installations.
Used In These Assemblies
- Commercial Curtain Wall Facades
- Glass Atriums and Institutional Buildings
- Unitized System Installations for High-Rises
❓ FAQ
Are curtain walls structural?
No. They are non-load-bearing systems that attach to the structural frame to form the outer envelope.
What makes a curtain wall suitable for high-rise buildings?
Load resistance, air and water tightness, movement accommodation, and tested fire compliance (NFPA 285).
Conclusion
Top curtain wall systems balance performance, cost, and appearance. By selecting proven products and integrating with tested standards like ASTM and NFPA, envelope professionals can deliver both code compliance and architectural excellence in every project.
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