Differences between the Standards:
The acceptance criterion is different for impact rated windows and doors between the Miami-Dade and Broward County Standard (Florida Building Code High Velocity Hurricane Zone test standard – HVHZ) and those of other organizations.
In Miami Dade County testing procedures are more rigorous and are underwritten with a Notice of Approval (NOA) number. A Florida Approval Number is then assigned to the NOA.
Butacite® polyvinyl butyral interlayer (PVB) has been continuously improved from its inception as the preferred material for safety glass. Advantages of laminated glass including safety, security, sound dampening, and the ability to offer solar control for energy savings.
Sentry Glass® Plus interlayer offers five times the tear strength and 100 times the rigidity of conventional PVB interlayer. It is an excellent candidate for demanding applications in the architectural market place.
In addition to impact and wind load testing, the product is tested for water and wind resistance and forced entry.
This water test meets the requirements of ASTM E 1105 and AAMA 502 to simulate wind driven rain. It involves hanging a calibrated rack of nozzles on the building, to shoot water at the windows. Inside, a pressure chamber with blower and digital manometer is mounted over the window to create a lower pressure than outside, and measure at what pressure the window-failure occurred.
Product & Glass selection:
The basis for selecting an appropriate product and glass make-up is determined with knowledge of the Design Pressures acting on the opening. Using this data and ‘certified product approval’ test results allows the selection of a product that’s meets with the opening size, and has tested pressures that meet or exceed the Design Pressures for wind loads and water resistance. The resultant selection lists the glass mark-up which includes the type of interlayer and type and thickness of glass pliers.
Here is an example of one chart from WinDoor, Inc. Series 8100 sliding glass doors NOA No 15-0723.12. Click here to see the full report: 15-0723.12