strutting constitutes a construction technique used to reinforce buildings. basically, a strut consists of a support system used to bolster beams in floors and ceilings. various types of strutting exist, some using wood and some using galvanised steel.
they are generally installed at the centre of a span when floor joists exceed 2.5 m. spans exceeding 4.5 m may require two rows spaced at 1/3 and 2/3 span. timber herringbone strutting should be at least 38 x 38 mm timber and can only be used where the spacing between the joists is less than three times the depth of the joist.
strutting helps to limit deflection and vibration of timber floors, and improves the lateral stability of individual joists. there are three main options available when considering strutting for timber floors: solid timber blocking; timber herringbone strutting; proprietary strutting devices.
wood information sheet. abstract. the role and effects of strutting in terms of deflection, joist stability and vibration; considers three types of strutting; where and how it can be used and installed. history. may 2018 edition. supersedes the february 2017 edition. first published 1998; revised 2005, 2011, 2015, 2016 and 2017. subjects
this wood information sheet (wis) is an overview when and why to use strutting in timber floors, types of strutting and how to install it. it has been updated in july 2015 with minor amendments to the text to cite the latest british standards and other references.
sometimes although the majority of my floor structure has solid bridging, i will have an area with herringbone struts so the plumber & electrician have a easy route to pass their pipes & cables through. setting out herringbone struts. it's impossible to hold a piece of timber in place to mark the length of a herringbone strut.
wood information sheet. abstract. summarises the findings of recent research and offers guidance on the provision of strutting in domestic and non-domestic floors covering deflections, vibration, types, where to use and how to install. history. superseded by the july 2015 edition. august 2011 edition. supersedes the 2005 edition.
this wood information sheet (wis) gives guidance specifically intended to minimize problems of movement and noise in timber floors in masonry or timber frame buildings. the guidance relates mainly to dwellings although much is applicable to floors in other building types, such as timber compartment floors in flats.