Part I: Designing HVHZ-Compliant Structural Glass Systems

Achieving Jumbo Transparency in the Florida Market

Florida’s coastline presents one of the most demanding environments for architectural design in the world. High-Velocity Hurricane Zones (HVHZ) demand uncompromising safety, strictly governed by Florida Product Approval (FPA) and Miami-Dade Notice of Acceptance (NOA) requirements. For architects and general contractors, the challenge is clear: how to achieve breathtaking, expansive transparency without sacrificing structural integrity or compliance.

At Sentech Architectural Systems, we know that bridging the gap between aesthetics and rigorous code demands requires more than just high-quality glass.  It requires highly specialized, early-stage engineering anchored on existing NOA approved systems.

The Rigid Reality of FLPA and NOA Requirements

In Florida, structural glass systems must perform during severe weather events. This means withstanding extreme positive and negative wind pressures and surviving both small and large missile impacts (Level D and E). Furthermore, these systems must manage extreme water intrusion using advanced sealing technology.

Standard off-the-shelf framing systems often restrict design flexibility to meet these criteria, forcing architects to compromise their vision with bulky profiles and limited spans. Overcoming this requires the use of advanced structural glass technology and the use of solutions like our award-winning VetraFin Impact.  This unique 28’ tall structural glass system is currently the tallest single-span Florida-approved façade solution on the market.

VetraFin Impact: Industry-Leading Technical Specifications

Developed specifically for high-end building entrances in hurricane-prone urban areas, VetraFin Impact is designed with maximum structural redundancy and transparency in mind. The system carries official Florida Building Code approval (FPA #FL33111) and delivers unparalleled performance specs:

• Tallest Single-Span Capability: Spanning up to 28’, our VetraFin Impact is the tallest single-span Florida-approved façade solution on the market.
• Jumbo Glass Panel Support: Accommodates massive, single-span glass face panels up to 28 feet in height and up to 10 feet in width.
• Vertical only Mullions and Minimalist Design: Utilizes 18-inch-deep structural glass or steel mullions to provide wind load support with zero visible exterior metal framing components
• Tested Under Extreme Pressures: Successfully completed rigorous impact and wind-cycle testing
• Versatile Applications: Tested and approved for both vertical facades and horizontal applications (using jumbo glass)

FAQs

What is the tallest single-span hurricane-impact structural glass system available?
The tallest single-span Florida-approved hurricane-impact facade on the market is Sentech’s VetraFin Impact system. It supports single-span glass face panels up to 28 feet in height and 10 feet in width, providing transparency for High-Velocity Hurricane Zones (HVHZ) without the need for horizontal intermediate metal framing.

How do glass fin systems meet Miami-Dade NOA and HVHZ structural requirements?
Glass fin systems meet strict HVHZ and Miami-Dade Notice of Acceptance (NOA) standards by replacing traditional heavy metal mullions with high-strength structural steel or glass fins. Sentech’s system relies on the bending strength of laminated glass, advanced interlayer technology, and hidden structural silicone connections to secure jumbo glass panels while resisting extreme positive and negative wind pressures.

Why is early engineering collaboration crucial for Florida Product Approved (FPA) glazing?
Early design and engineering collaboration is critical because late-stage redesigns in highly regulated Florida markets are incredibly expensive. Engaging an engineering partner early allows for the creation of accurate Rough Order of Magnitude (ROM) budgets during schematic phases, the identification of structural load limitations, and the resolution of clash points before manufacturing.

What are the typical applications for jumbo structural glass systems in hurricane zones?
Jumbo impact-resistant structural glass systems are most frequently utilized in high-end commercial projects, including specialty structural glass facades, lobby entrances, glass fin walls, and clear-span cable net structures where maximizing natural light and safety are simultaneous priorities.

How does Sentech ensure glass safety and post-breakage redundancy?
Sentech’s engineering team utilizes advanced energy models to predict glass breakage behavior prior to physical testing. The systems are designed for redundant structural behavior, optimizing post-breakage performance to ensure the building envelope remains secure and sealed even under maximum environmental stress.

Find out more about Sentech’s high performance impact systems on our Products page!