Our traditional galvanised range - Technical Standards
Our established range of galvanised lintels is designed and manufactured in accordance with:
- Our structural carbon steel complies with BS 4360.
- Our Stainless Steels comply with BS EN 10088-2
- Galvanising after manufacture is to BS 720 (minimum coating weight 920 g/m2 including both sides).
- Our G600 galvanised steel complies with BS EN 10142 (minimum coating weight 600 g/m2 including both sides).
- Our Lintels meet the requirements of BS EN 845-2:2003.
- Our lintels are designed to be installed in accordance with the masonry codes of practice BS 5628 & BS 8215.
- Assessment of the loads on the lintels complies with BS 5977-1 and BS 6399.
- Safe working loads of our galvanised range were calculated by computer modelling based on BS 449 and,
- In conjunction with load tests at the University of Glamorgan in accordance with BS 5977-2.
- Our galvanised range comply with BS5977-2 for corrosion protection, materials and workmanship.
- Our manufacturing process has been quality assured to BS EN ISO 9002.
- Our CFC-free polystyrene insulation is manufactured in accordance with BS 3837
- Where required, structural capacity calculations for special lintels designs are to BS 5950-1&5.
Installation Information for our traditional galvanised range
Our lintels are generally designed to be installed in accordance with BS 5628 & BS 5977.
Lintels should be checked on delivery and only undamaged lintels used.
An end bearing of at least 150mm (and in the case of lintels with Lintray stop-ends, a minimum 100mm past the cavity closer) is required and lintels should be fully bedded on brick laying mortar, ensuring that the front and back of the lintel is level before proceeding. The inner and outer leaves supported by the lintel must be raised together to avoid excessive eccentricity of loading.
Blocks should continue for the full length of the inner flange. Loads should not exceed the stated figures with a ratio of 1:5 (outer to inner) for the SC ranges and 1:19 for the MC and HC ranges. Consult our technical department before exceeding these loads or applying point loads. A supported cavity wall should incorporate suitable wall ties above the lintel to provide stability (to BS 5628).
All galvanised lintels should have a separate DPC installed above by BS 5977-2, unless they have a super-heavy duty galvanised coating of at least 1420g/m2 (including both sides) and have integral stop-ends to form a DPC compliant with BS 8215.
Stainless steel lintels with integral stop-ends do not require a DPC above. |
