Stressline products are manufactured to the highest quality, under strict control, and comply with all relevant British Standards. We are continually assessed by the BSI to ensure our quality assurance systems comply with BS EN ISO 9001: 2008.
Stressline standard galvanised steel lintels are manufactured from DX51D grade steel to BS EN 10346:2006, with a zinc coating type Z600, giving a minimum zinc coating of 600g/ m² per two sides. All cut edges are treated with corrosion resistant paint. RS and RSC lintels are manufactured with a 6mm welded bottom plate to BS EN 10025 – 2: 2004 of steel grade S275.
The loadings published in the load-span tables within the lintel guide were achieved in accordance with BS EN 845-2: 2003 and tested in accordance with BS EN 846-9: 2000.
Stressline prestressed concrete lintels are designed with a concrete strength of 50 N/mm² or 60 N/mm² and utilising strands to BS 5896:2012. Lintels are manufactured to BS EN 845-2:2003, tested to BS EN 846-9:2000, and loadings assessed as per BS 5977-1:1981. Materials used in the making of Stressline prestressed concrete lintels comply with BS EN 206-1:2000 and BS 8500.
Following an extensive development programme we are now producing semi-dry cast stone with a compressive strength which exceeds the requirements of the current British Standard. Compressive strength is an important aspect from the point of view of early handling which requires a relatively good strength at 7 – 14 days, BS EN 771-5 specifies a minimum compressive strength at 28 days of 25 MPA (N/mm2). We aim for a minimum compressive strength of 40 N/mm2, improving handling characteristics and long-term durability.
Our thermal flooring system has been awarded the BBA certificate 13/5021, we also have been awarded the Worksafe Contractor Membership Certificate as recognised by Safety Systems in Procurement (SSIP) for our flooring installation.