05/Layout 1 07/Project1_FIXINGS & FASTENERS Weathering the storm Jason Wood, contracts director at Fixing Point, looks at choosing the right fixings and fasteners for your environment Choosing the right fixings and fasteners is about more than just ticking a box and filling out a form. The immediate surrounding environment, the full specification of the building construction, and the location of the site, can all determine the overall success of a project. Understanding specifications A common cause of confusion for contractors is understanding the specifications of a fixing and its application. This information is crucial for ensuring a structure holds together securely and validates long-term warranties. Contractors should always seek advice from their fixings supplier on technical performance specifications, but understanding the application is essential to this process. The ultimate pull out grade of a particular fixing will change, depending on the final thickness or type of material it is going into, and the size of washer recommended will be determined by the area of the building. For example, in most building structures, a roof will be more affected by wind uplifts than a wall, so roof fixings EJOT_HDPS_LEFT 06/02/2018 08:58 Page 1 R Intelligent fastening for membrane systems HTK 2G 5O: Polyethylene tubewasher Combines with carbon steel or A4 grade stainless steel fasteners Secures insulation or membrane plus insulation back to deck EJOT ECOset: Automated installation system available 078 FEBRUARY 2018 RCIMAG.COM would normally require a larger washer than wall fixings. Contractors should always ask to see the technical performance sheet for any chosen fixing, but it is important to provide all the information about the building materials and construction at this stage so that appropriate recommendations can be made. A structural engineer will then be able to advise on how many fixings are required per square metre to meet the required structural specification of the building project before final orders are placed. At Fixing Point, establishing the final material the fixing will be going into is always our primary focus before we make any recommendations to contractors. Enviroment and weather corrosion The next major factor to consider when selecting the appropriate fixings and fasteners for any given structure is its location and immediate environment. Coastal, chemical and high wind locations, for example, always carry a higher risk of structural damage and corrosion exposure than other areas. Therefore, it is important to understand how much force a particular fixing can take, and its resistance to the corrosive elements once you have established the area, application and material thickness. In adverse weather conditions, high wind force can cause pressure and suction loads on the sheet material, which could result in the sheet pulling over the washer if incorrectly specified. This could not only cause damage to the building, but would also result in a serious risk to health and safety. Exposure to strong winds and rain will also have an impact on the number of fixings required per square metre. This detail should be determined by a structural engineer, and extra care should always be taken to ensure all laps and sheets are sealed using the correct mastics to prevent leakages and movement of the roof and wall sheets after installation. If a building is located in an area with high exposure to coastal and chemical corrosion, such as near the sea shore, heavy industrial plants, airports and train stations, will also require a different set of specifications when it comes to choosing the right fixings. Carbon, Mechanical and Part-Mechanical fixing solutions for steel,plywood and concrete decks.
RCI Feb 2018
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