1 hour fireplace rated wall plate timber 140x45mm – Tech Journal

Whether or not timber would obtain a 1-hour fireplace score is dependent upon the scale and density of the species of timber. Our Technical Design Information #06, titled Timber-Framed Building – Sacrificial Timber Building Jointexplains easy methods to use timber’s charring properties. A duplicate might be downloaded freed from cost from our web site through this hyperlink https://www.woodsolutions.com.au/publicationsor a tough copy might be bought right here https://www.intertekinform.com/en-au/search/normal/?searchTerm=WS06&productFamily=STANDARD&q=WS06. The development particulars in our Technical Design Information #06 are legitimate for any species of timber with a density not lower than 470 kg/m³. TDG #06 relies on Australian Commonplace 1720 Half 4: Hearth resistance for structural adequacy of timber members. To calculate the charring fee (c) in millimetres per minute the formulation in AS 1720.4 is:

²

The place = timber density at 12% moisture content material in kg per cubic metre

For instance, the charring fee of pine with a density of 550 kg/m³ could be 0.4 + 0.26 = 0.66 mm/min. A dense hardwood would ‘char’ extra slowly. A structural design verify is required to ensure the residual part would proceed to hold the load after a 1-hour interval.