Friday, April 5, 2013

Fireproofing your Metal Building



Metal tends to already have the strength and durability to survive in any type of disastrous weather or condition; however it’s still a good idea to have it prepped with proper materials to protect against fire.  Unprotected metal can loose up to 50 percent of its load-carrying capacity as the temperature raises to 1,200 F.  If you fire proof your steel building, you can be sure that they will help to protect your steel building by providing an hourly shield that will protect from fire impingement at certain intensity for a specific time.

There are numerous paints that can be put over the metal of your steel building   These are called Intumescent pains.  When exposed to paint, these paints will chemically react and expand to many times their original volume.  They will also get thicker.  When exposed to heat at about 300 F., which is just a little less than boiling water, there heat sensitive ingredients react and froth up into a foam which contains millions of tiny hollow cells.  When this happens, it’s basically providing an insulated coating that protects the metal and reduces the heat rate and will prolong load-bearing capacity.  These types of paints also produce a light which happens to be a poor conductor of heat. These materials contain hydrates, when they are spent, water vapour is released.  And this creates a cooling effect.  Once the water is spent, it’s only the char’s insulation characteristics that will then slow down heat transfer from assembly’s exposed side to the other unexposed side.  
to protect from fire.

Sprays for metal buildings to protect from fire have also become very popular.  Spray-Applied Fire Resistive Material also known as (SFRM) has gained in usage because of its inexpensive product.  The used to be named cementitious mixtures and has changed because it is no longer cement based. This paint should be applied to unprimed/unpainted substrates.  They tend to be low-density material and are supplied in bags and when missed with water is sprayed onto metal as a type of slurry.  It can be used externally and will cover complex details. 

Depending on how the spray or paint is applied, the fire resistant material all depends on the member size, fire severity, fire rating, duration of exposure, budget and location. When masking the product, make sure it is done on site.  Also, application may be require a professional as they do carry special tools to apply the paints.  When selecting a paint or spray, be sure to select it carefully in order to protect your structure and to comply with architectural, code and customer requirements.  Remember, you can also visit a manufacturer to get help on which type of pain is right for your building.

2 comments:

  1. Sprays for metal buildings to protect from fire have also become very popular. Spray-Applied Fire Resistive Material also known as (SFRM) has gained in usage because of its inexpensive product flame retardant spray.

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