Editor at 08:31, 5 April 2023

2023-04-05T08:31:14Z

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	Charring rate, refers to depth and speed that materials burn on exposure to fire. It is a key part of calculating the fire resistance of different timber elements in buildings, particularly structural elements. The charring rates are calculated by measuring the char depth, in comparison with the time material is exposed to the heat load.		Charring rate, refers to depth and speed that materials burn on exposure to fire. It is a key part of calculating the fire resistance of different timber elements in buildings, particularly structural elements. The charring rates are calculated by measuring the char depth, in comparison with the time material is exposed to the heat load.

−	EN 1995-1-2:2004 provides charring rates for different timber materials for the purposes of informing initial design. The charring rates apply to each face of the timber that is exposed to fire):	+	EN 1995-1-2:2004 provides charring rates for different timber materials for the purposes of informing initial design. The charring rates apply to each face of the timber that is exposed to fire. For example, if a softwood element is exposed on all four of its sides to 20 minutes of fire: 2 x 20 x 0.8 = 32 mm

−	~~MATERIALCHARRING RATE~~ ßn (mm/min)	+	Example different material charring rates ßn (mm/min)

−	Softwood ~~timber0~~.8	+	* Softwood timber 0.8
		+	* Softwood glulam and laminated veneer lumber (LVL)0.7
		+	* Western Red Cedar (390 kg/m³) 0.8
		+	* Hardwood timber and hardwood glulam 0.55
		+	* Oak and Sapele (>640 kg/m³) 0.5

−	~~Softwood glulam~~ and ~~laminated veneer lumber (LVL)0~~.7	+	It is important to note that the process of charring releases air and oxygen and chemically restructures timber to actually make it more fire resistant, this process can also be carried out mechanically where wood is burned evenly and at a constant rate to improve performance.

−	~~Hardwood timber and hardwood glulam0.55~~	+	= Related articles on Designing Buildings =

−	~~For example, if a softwood~~ element ~~is exposed on all four of its sides to 20 minutes~~ of fire:	+	* Fire.
		+	* Fire protection engineering.
		+	* Fire resistance.
		+	* Fire-separating element.
		+	* Fire-stopping.
		+	* In-situ reinforcement of timber beams.
		+	* Sacrificial timber.
		+	* Timber frame.
		+	* Timber framed buildings and fire.
		+	* Timber preservation.

−	~~2 x 20 x 0.8 = 32 mm~~	+	[[Category:DCN_Definition]] [[Category:DCN_Specification]] [[Category:DCN_Standard]] [[Category:Definitions]] [[Category:Standards_/_measurements]] [[Category:Products_/_components]]
−		+
−	~~The width and depth of the element would require 32 mm of sacrificial timber.~~	+
−		+
−	[[Category:~~Articles_needing_more_work~~]]	+

Editor: Created page with "Charring rate, refers to depth and speed that materials burn on exposure to fire. It is a key part of calculating the fire resistance of different timber elements in buildings, p..."

2023-04-05T07:48:13Z

Created page with "Charring rate, refers to depth and speed that materials burn on exposure to fire. It is a key part of calculating the fire resistance of different timber elements in buildings, p..."

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Charring rate, refers to depth and speed that materials burn on exposure to fire. It is a key part of calculating the fire resistance of different timber elements in buildings, particularly structural elements. The charring rates are calculated by measuring the char depth, in comparison with the time material is exposed to the heat load.

EN 1995-1-2:2004 provides charring rates for different timber materials for the purposes of informing initial design. The charring rates apply to each face of the timber that is exposed to fire):

MATERIALCHARRING RATE ßn (mm/min)

Softwood timber0.8

Softwood glulam and laminated veneer lumber (LVL)0.7

Hardwood timber and hardwood glulam0.55

For example, if a softwood element is exposed on all four of its sides to 20 minutes of fire:

2 x 20 x 0.8 = 32 mm

The width and depth of the element would require 32 mm of sacrificial timber.

[[Category:Articles_needing_more_work]]

Charring rate - Revision history

Editor at 08:31, 5 April 2023

Editor: Created page with "Charring rate, refers to depth and speed that materials burn on exposure to fire. It is a key part of calculating the fire resistance of different timber elements in buildings, p..."