What are Limitations of Small & Large Missile Impact Designs?

We are frequently asked what are the limitations applied on Small Missile Impact and Large Missile Impact products. Engineering Express takes into consideration the following code limitations while preparing design charts for operable windows/glass doors and non-operable windows/glass doors: 

Referencing Florida Building Code Seventh Edition, (2020) Chapter 2411.3.2.4.i & 1709.5.1.3.i for Operable Windows and Glass doors: 

  • For Windows and Doors other than Bifold or sliding glass doors, the Tested area (Frame width x Frame Height) shall not be exceeded in alternate frame sizes mentioned in the design charts.  
  • For Bifold or sliding glass doors, the Tested panel area (Panel width x Panel height) shall not be exceeded in alternate frame sizes mentioned in the Design charts. However, the alternate overall frame area shall exceed the tested area by a maximum of 1.5 x tested overall frame area.  

             In all cases, the Tested Frame height shall not be exceeded. 

  • Frame Tributaries may vary, considering Horizontal member length limitations, load, and deflection calculated from the new tributary width. 
  • All other Factors such as deflection, distributed or concentrated load applied on members, cyclic wind pressure, design wind, and unbraced member length shall not be exceeded and/or studied while preparing the design charts. 

Referencing Florida Building Code seventh Edition (2020) Chapter 2411.3.2.4.ii & 1709.5.1.3.ii for Non-Operable Windows and Glass doors: 

  • For Windows and Doors other than Bifold or sliding glass doors, the Tested area (Frame width x Frame Height) shall not be exceeded in alternate frame sizes mentioned in the design charts.
  • In all cases, the Tested Frame height shall not be exceeded.

  • Frame Tributaries may vary, considering Horizontal member length limitations, load, and deflection calculated from the new tributary width.

  • All other Factors such as deflection, distributed or concentrated load applied on members, cyclic wind pressure, design wind, and unbraced member length shall not be exceeded and/or studied while preparing the design charts. 

Lastly, Engineering Express’s design team takes into consideration other factors to deliver properly designed Impact Products which we would be happy to discuss with you as needed. We ensure the designed products comply with Florida Building Code, successfully submitted, and will be legally approved by the Authority having jurisdiction. 

Last Update: March 19, 2021  

March 19, 2021 90 Frank Bennardo  Codes & Standards, Engineering  
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