Contents
What is ASTM E84 ul723?
The ANSI/UL 723 (ASTM E84) Surface Burning Characteristics of Building Materials test is typically used to determine the relative surface burning characteristics of materials used as coverings for walls and ceilings.
What does a flame spread index of 25 mean?
A numerical reference that measures how fast and far a flame spreads during a 10-minute test. CLASS A = Flame Spread Index of 25 or less; the best possible rating, awarded to fire-retardant building products, like concrete.
What is the index of a Class C finish material rating?
What is a Class C or Class 3 fire rating? A Class C or Class 3 fire rating has a flame spread rating between 76 and 200. This rating incorporates building materials like plywood, fiberboard, and hardboard siding panels. It also includes any of the faster burning whole woods.
What is ul723?
The UL 723 Surface Burning Characteristic of Building Materials test is a standard of Underwriters Laboratories (UL) that measures the burning properties, or fire resistance, of building materials that may be exposed to flames.
What is a 25 50 fire rating?
The flame spread and smoke developed index results are reported on a scale from 0 (cement board) and 100 (red oak). The flame spread index (FSI) for pipe and duct insulation used in an air plenum must be 25 or less and smoke developed index (SDI) 50 or less, commonly referred to as “25/50” rated.
Can ULC S102 vs ASTM E84?
Each ASTM E84 test produces FSI and SDI, while each CAN/ULC-S102 test produces Flame Spread Value (FSV) and Smoke Developed Value (SDV). Additionally, three or more tests performed on the same material for CAN/ULC-S102 produce averaged values to create Flame Spread Rating (FSR) and Smoke Developed Classification (SDC).
What does a smoke developed rating indicate?
Smoke-developed index (abbreviated SDI) is a measure of the concentration of smoke a material emits as it burns. Like the Flame Spread Index, it is based on an arbitrary scale in which asbestos-cement board has a value of 0, and red oak wood has 100.
What is the best fire rating?
Answer 451 degrees . Fire Resistant safes and burglar fire safes should have a minimum of a 1 hour fire rating. Typically, a safe with less than a 1 hour fire rating will not provide adequate protection for paper or money in the event of a fire.
What is a good smoke developed index?
The ASTM standard E84 defines a standard test method for surface flame spread and smoke density measurements. A smoke-developed index of less than 450 is required by IBC section 803.1 at interior walls and ceilings for all surface materials except trim.
What is a Class B material?
In fire classes, a Class B fire is a fire in flammable liquids or flammable gases, petroleum greases, tars, oils, oil-based paints, solvents, lacquers, or alcohols. For example, propane, natural gas, gasoline and kerosene fires are types of Class B fires. Some plastics are also Class B fire materials.
What is class 1y fire rating?
The worst, Class 4 – i.e. longest distance and fastest of flame spread, To the best, Class 1 – i.e. least distance and slowest of flame spread. e.g. A good Class 1 result would be the flame not spreading further than 165mm from the point of ignition over the total test time of 10 minutes.
What is an F fire rating?
The. F Rating of a floor or wall indicates the number of hours (or fractions of hours) for which. the assembly has been tested to keep fire from moving from one side to the other.
What is the value of the smoke developed index?
Smoke-developed index. Jump to navigation Jump to search. Smoke-developed index (abbreviated SDI) is a measure of the concentration of smoke a material emits as it burns. Like the Flame Spread Index, it is based on an arbitrary scale in which asbestos-cement board has a value of 0, and red oak wood has 100.
What should smoke developed index be for ceiling?
Smoke-developed index. The ASTM standard E84 defines a standard test method for surface flame spread and smoke density measurements. A smoke-developed index of less than 450 is required by IBC section 803.1 at interior walls and ceilings for all surface materials except trim.
How is the fire spread Index ( SDI ) measured?
Like the Flame Spread Index, it is based on an arbitrary scale in which asbestos-cement board has a value of 0, and red oak wood has 100. The SDI is measured using a horizontal test specimen, according to the Steiner tunnel test protocol. The ASTM standard E84 defines a standard test method for surface flame spread and smoke density measurements.
What is the Flame Spread Index for wood?
Though different species of wood differ in their surface burning (flame-spread) rates, most wood products have a flame-spread rating less than 200 and are considered Class C or III material. A few species have a flame-spread index slightly less than 75 and qualify as Class B or II materials.