Carpet Smoke Density Rating

The density formula most often used in the u s.

Carpet smoke density rating.

Carpet pad installation costs 0 50 to 1 00 per square foot and the right choice depends on the. Carpet years density rating. And favored by cri is average pile yarn density. For most areas of the home carpet pads should have a minimum density rating of 6 and be around 3 8 to 1 2inch thick but opt for a slightly thinner and more dense pad around 8 for high traffic areas like stairs and be sure to choose a purpose specific pad if you are carpeting over heated flooring.

The thickness and density of carpet pads affects how the carpet looks and feels. Average pile yarn density and the importance of correct pile measurement 275 kb there are various methods of stating relative density specification for pile carpets. Carpet rule 2. Density x pile height 36 face weight e g 2160 x 0 50 36 30 in this example what we know is that the pile density is 2160 and the pile height is 0 5 one half inch.

5 000 wear rating durability rating. Thickness ranges from 0 25 0 50. This includes all commercial and residential carpet. Astm e662 standard test method for specific optical density of smoke generated by solid materials.

This rating shall likewise be included in the specifications of the material s by the manufacturer. The density of a carpet is one of many factors that determine a carpet s quality and overall performance. It is described in the hud fha publication um 44d as follows. All carpets must have an nbs smoke chamber test of 450 or less or it can not be legally manufactured in the united states.

That are essentially the same. The results of this will be either class i or class ii. Wear rating is a subjective measure of how long the carpet will last. We can now use rule 1 to determine the pile density rating.

Smoke density is reported in terms of maximum optical density based on an arbitrary scale of zero to 800. If the carpet is for sale it needs to pass this test. Most soft flooring types need a cushion underneath for ideal use. 12 greater than 3 100.

In all instances interior finish materials irrespective of the approved classification of flame spread shall have a smoke density rating of less than 450. It s determined by the carpet manufacturer and it s usually a 1 5 rating. Despite a common misconception carpet density and carpet face weight are not interchangeable terms that mean the same thing although face weight is one factor used to calculate density. Products with a density of 6 to 8 pounds are standard.