Do Catnic lintels need DPC?
It is a National House Building Council (NHBC) requirement to apply a damp proof course (DPC) over each lintel to protect it. Many Catnic lintels feature a Duplex Corrosion Protection coating and a unique profile shape that acts as a built-in DPC.
What is an open back lintel?
Overview. Open Back Cougar Lintels are for use in Cavity Wall construction. The lintels incorporate insulation, built-in plaster key and DPC. The lintels supports uniform distribution of masonry loads, timber floors and roof loads.
Are Catnic lintels load bearing?
All lintels are designed to carry a specific safe working load (SWL). If you are not skilled in the method of load assessment, or the load has not been supplied to you by a third party, for advice please contact Catnic Technical Services on 02920 337900.
What is the maximum span for a Catnic lintel?
Product Benefits. Standard lengths are available in increments of 150mm at lengths up to 3000mm, 300mm at lengths from 3000mm – 4800mm (including 4575 but excluding 4500mm). The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.
What is the minimum bearing for a lintel?
150mm
Steel Lintels Installation Guide. Steel Lintels should be installed with a minimum end bearing of 150mm, bedded on mortar and levelled along its length and across its width.
What is cavity lintel?
A cavity lintel is designed to be used when two layers of bricks and blocks, or ‘skins’ are used to construct a space or cavity between the structure. …
What are cavity wall closers?
What is a cavity closer? A cavity closer fits within a cavity wall, where windows and doors are fitted. The cavity closer acts as a seal, preventing external water vapour and damp from entering the cavity wall and the building, whilst also preventing heat from being lost through the gap.
Can you cut Catnic lintels?
Some of the heavy duty Catnic Lintels cannot be cut as they have reinforced end which provide the additional strength.
What is the widest span for lintel?
For spans greater than 1200mm, lintels should be adequately propped during construction at a maximum of 1200mm centres. Props should not be removed until the mortar has matured.
How high above a window is the lintel?
Generally each window should have a lintel rested at least 150mm on each side of the window to hold bricks.
What makes a Catnic stainless steel lintel unique?
Catnic has pioneered the steel lintel for five generations, our products are manufactured with a unique duplex corrosion protection system, an integral plaster key and built-in damp proof course with continuous insulation making them the most unique lintel on the market.
How big is a lintel Catnic cavity wall?
Standard lengths are available in increments of 150mm at lengths up to 1800mm, 300mm from 2100mm to 3600mm. The SWL (safe working load) is based on the total UDL (uniform distributed load) over maximum span using 150mm end bearings.
What is BBA certifi cation for Catnic steel lintels?
BBA Certifi cation Catnic steel lintels are certifi ed by the British Board of Agrément under certifi cate number 91/2638. Fully Part L Compliant Catnic steel lintels comply with Parts L1 and L2 of the Building Regulations Approved Documents.
What kind of lintel to use for solid wall?
For solid wall construction in excess of 250mm an appropriate Open Back Lintel can be utilised, contact Catnic Technical Services for details. CN71 and CN81 lintels can also be used as heavy duty wall eaves lintels for 70mm to 100mm cavities.