Window Design Pressure Rating Chart

This could be different from a window thats built to lower your energy bills by keeping out unwanted hot or cold air.

Window design pressure rating chart. In other words if a window is rated to dp40 then it is actually tested to 60psf. A careful record is made of how long the window lasts under what pressure. The design pressure that you need for the windows in your home will vary. Some background on dp ratings.

A higher dp value indicates a window or door that can withstand more wind water andor structural load than a window with a lower dp. Vasd dp 0. Outward on the window. The higher the number on the scale the better the resistance to the benchmarks.

V velocity mph dp design pressure astm e330 dp 000256 x v 2 vasd nominal design wind speed. To start lets define what design pressure rating means. Water infiltration air infiltration and structural load. Design pressure rating is an older value representing the capability to withstand wind pressure.

Window opening area sf 90mph. This rating symbolized by a number encompassed three different criteria. Good discussion i am going to offer a few comments on design pressure. In other words a 30 dp window would have to withstand 45 pounds of pressure per square foot.

The design pressure rating specifically addresses how strong your window is and how well itll hold up to the need to bear weight. Vult v asd 06 allowable stress design vs. To determine a tested windows design pressure rating the test pressure must reach 15 times the design pressure for 10 seconds without the window suffering permanent damage. Classdesign pressure in psf inches of water classdesign pressure equivalent wind velocity in mph structural test pressure in psf inches of water structural test pressure equivalent wind velocity in mph water test pressure in psf inches of water water test pressure equivalent wind velocity in mph.

00256 or v asd vult 06 vult ultimate design wind speed. If a window is rated to dp20 then it is tested to 30psf. In practicality a window or door with a structural dp rating of 50 has passed a structural test pressure of 75 pounds per square foot equal to a 200 mph wind. If the wind speed is 70 mph the wind pressure is 000256 x 70 2 125 psf.