Steelite lintels are manufactured from high quality grade pre-galvanised mild steel to EN 10346:2015 DX51D plus Z600 giving a minimum coating of 600g/m2 (including both sides) with a minimum yield stress of 250N/mm2.
The “hot dipped, pre-galvanising” process is carried out at the mill to ensure a more consistent quality of zinc coating. This guarantees a more effective anti-corrosive system. Pre-galvanised lintels are much more “environmentally friendly” than post galvanised lintels.
In accordance with I.S. EN 845-2:2013+A1:2016 all cut edges are treated with a quick-drying, anticorrosive pigmented and semi-gloss alkyd paint.
In the case of coastal region or areas with high corrosion rates, Steelite offers a galvanised lintel service. Post fabrication, structural grade S275JR/S355JR mild steel are hot dip galvanized offering a minimum local coating thickness of 55µm with an average coating thickness of 70µm to galvanizing standard I.S. EN ISO 1461 : 2009.
Please contact our technical service for advice or additional information. Click the image below to view the corrosion map of Ireland and the UK (3Mb PDF download).
Corrosion map produced by www.galvanizing.ie
The Steelite lintel range has loading capacities stated in each applicable loading table. The structural performance figures within each table have been ascertained by testing in accordance with the requirements of IS 5977 Part 2 1983 and IS EN 845-2:2003. The figures take into account the different loading arrangements which are common to traditional cavity wall construction.
Safe Working Load (S.W. L.) is the maximum force that can be safely applied to the lintel. There values represent tested capacity of the lintels that are reduced by factor of safety (Fs = 1.6). These values should be used when comparing lintel capacity with unfactored structural loads.
Ultimate Working Loads (U.W.L) is maximum force that will reach lintels limit state of serviceability. These values represent actual tested capacity results of our products and should be used when comparing lintel capacity with factored structural loads.
Differential Load Ratio 3:1 refers to inner to out leaf loading capacity ratio (e.g. where total capacity would be sum of 75% loading on the inner & 25% loading to the outer leaf)
In order to satisfy the requirements of the Building Control (Amendment) Regulations, SI No. 9 of 2014, Ancillary Certificates have been developed and agreed. When design work only is undertaken by a party appointed by a Contractor / Builder, and that party does not subsequently undertake the related construction work, then that party would sign one of the Certificates prepared by the Professional Bodies.
As part of Steelite’s Service, we offer Ancillary Certificates of Compliance for Design SC, SD. We can only offer this service when we have done structural calculations and lintel specification based on engineers and/or architects plans provided to Steelite. See the How To Order page for information.
Expanded Polystyrene, known as EPS is used in all lintels and offers a thermal conductivity of 0.036W/mK. The thermal performance of EPS does not degrade over time, meaning the U-value you first achieve with EPS will not change.
Insulation is cut to fill the shape of the lintel and runs continuously along the cavity of the lintel. This helps to prevent heat loss as EPS has a high vapour resistivity which makes the material effective in preventing the deposition of surface condensation and interstitial condensation.
In addition, EPS is rot-proof, mould, water and moisture resistant due to its closed cell matrix of 98 percent air and 2 percent EPS.
EPS insulation is manufactured without the use of any ozone depleting gases such as CFCs and HCFCs.
