NBS Source
I'm a manufacturer

Compare variants

IG Hi Therm + Cavity Wall Lintels - Standard/ Heavy/ Extra Heavy Duty
IG Hi Therm + Cavity Wall Lintels - Standard/ Heavy/ Extra Heavy Duty
IG Hi Therm + Cavity Wall Lintels - Standard/ Heavy/ Extra Heavy Duty

Verified 3 days ago

IG Lintels

Verified 3 days ago

IG Lintels

Verified 3 days ago

IG Lintels
Summary
Cavity >90 mm | BBA | Part L Compliant | UKCA | CE | Galvanized & Stainless
-
-
Application
  • Hi Therm + lintels for use in an external cavity wall construction to support walls, floors and roofs above window and door openings.
  • Cavity widths greater than 90 mm.
  • Lintels should be installed with a minimum end bearing of 150 mm, bedded on mortar and levelled along its length and across its width.
  • The masonry above the lintel should be built in accordance with BS EN 1996-2.
  • Raise the inner and outer leaves simultaneously to avoid excessive eccentricity of loading, with a maximum height difference of 225 mm (masonry should be laid on a mortar bed and all perpendicular joints should be filled).
  • Allow the mortar to cure before applying floor or roof loads (temporary propping beneath a steel lintel is practiced to facilitate speed of construction).
  • NHBC & LABC recommend a damp proof course (DPC) or cavity tray should be installed over all openings in external cavity walls.
  • When installing concrete floor units or other heavy components above a lintel, care should be taken to avoid shock loading and floor units should not be dragged into position. Masonry immediately above the lintel should be allowed to cure.
  • Point loads should not be applied directly onto lintel flanges. Lintels should have a minimum of 150 mm masonry between the flange and the application level of any form of loading. Consult IG’s Technical Department if applying a point load above a lintel.
  • The external lintel flange must project beyond the window/door frame and it is recommended that a flexible sealing compound is used between the underside of the lintel flange and the frame. 
  • Do not cut lintels to length or modify them in any way without consulting an IG engineer.  
  • Lintel should be centred in the cavity and the distance between lintel up-stand and masonry must not exceed 10 mm.
  • Masonry should not overhang any flange by more than 25 mm.  
  • The practice of propping a lintel is sometimes used to facilitate speed of construction. It should only be introduced after initial masonry load has been applied to the lintel. 
  • Stop ends are required at each end of a lintel to prevent moisture cascading over the ends into the cavity and onto the inside wall.
  • At least two weep vents are required per opening and positioned not more than 450 mm apart. 
-
-
Description

All IG Hi Therm + lintels satisfy the thermal performance requirements of Approved Document L of the Building Regulations (E & W), Northern Ireland’s Technical Booklet F and Scotland’s Technical Handbook, section 6. The IG patented rigid polymer thermal isolator acts as a thermal break, preventing thermal bridging while adding extra rigidity. IG lintels are insulated with expanded CFC-free profiled polystyrene insulation conforming to BS EN 13163. Provide a damp proof course / cavity tray over all lintels. 


For more detailed information applicable to a particular wall construction, contact IG Lintels Technical Department.

Refer to manufacturers literature for details regarding lintel ranges, height, thickness and uniformly distributed load (UDL) figures.


Performance:

Fire:

  • IG Hi Therm + lintels have been subjected to a fire test (Report No. 380220) in accordance with BS EN 1363-1, at Exova Warrington Fire and achieved a one hour fire performance.

Corrosion:

  • IG’s Hi Therm + range of lintels are manufactured from high quality grade pre-galvanized mild steel to BS EN 10346 DX51D with a zinc coating of 600 g/m² (including both sides) conforming to BS EN 845-2.
  • The use of austenitic stainless steel is ideal when the life expectancy and maintenance programme of a building are key considerations.  
  • Material / coating specification in buildings exceeding three storeys in a non-aggressive environment should be limited to austenitic stainless steel (chrome nickel alloys).  
  • Material / coating specification for buildings in an aggressive environment (e.g. coastal sites) should be limited to austenitic stainless steel (molybdenum chrome nickel alloys). 

Structural:

  • The IG lintel range has safe working loads as detailed in each applicable loading table in the IG Lintels Product Guide brochure.
  • The structural performance figures within each table have been ascertained by testing in accordance with the requirements of standards BS EN 5977-2, BS EN 846-9 and BS EN 845-2.

Certification:

  • BBA Agrement certificate 18/5533 including regular assessment of production.
  • UKCA assessment of performance, system 3.
  • CE assessment of performance, system 3.
  • EN 1090-2 Execution Class 2, declaration method 1,2,3a & 3b, Certificate 14/F106 & 14/F107.
  • ISO 9001 Quality Management Systems, Certificate 18/Q059.
  • ISO 14001 Environmental Management Systems, Certificate 18/E019.


Special lintels:

IG lintels can be supplied to suit a wide range of wall types, loading scenarios and bespoke custom made specials:

  • Bay lintels (Square or Splayed),
  • Corner lintels,
  • Sunlounge lintels,
  • Eaves lintels.

Contact IG Lintels Technical Department for further information.

Stainless steel:

  • All IG’s Hi Therm + range of lintels can be manufactured from austenitic stainless steel, grade 304 2b BS EN 10088-Part 2 Astm 240 (European Grade 1.4307). Upon request, other grades of stainless steel lintels are available conforming to BS EN 845-2.

Additional features:

  • Free scheduling and specification service.
  • IG Hi Therm + lintels have a service life commensurate with that of the building in which they are installed.
  • Keying options to suit required plastering applications.
  • Eaves lintel.
  • Cant brick. 
  • Powder coating.
  • Soffit cladding.
  • Brick slip cladding. 
  • Universal arch.
  • Weep holes.
  • Stop ends.

Contact IG Lintels Technical Department for further information

-
-
Product certifications
-
-
Color
Silver
-
-
Finish
Galvanized, Powder-coated
-
-
Material
Steel, Stainless steel
-
-

Specification

Classification data
Standard
To BS EN 845-2.
-
-
Lintel type
Composite.
-
-
Material finish and coating reference
Pre-galvanized mild steel to BS EN 10346 DX51D with a zinc coating of 600 g/m² (including both sides). Material Coating Ref L14., Austenitic stainless steel, grade 304 2b to BS EN 10088-Part 2 Astm 240 (European Grade 1.4307). Material Coating Ref L3., Austenitic stainless steel, grade 316 2b to BS EN 10088-Part 2 Astm 316/316L (European Grade 1.4404). Material Coating Ref L1.
-
-
Sizes
As Lintels schedule.
-
-
Characteristics
-
-
-
Resistance to fire
Has achieved a minimum period of 60 minutes in accordance with BS EN 1363-1.
-
-
Thermal conductivity
Part L compliant.
-
-

Additional properties

Cavity width
90–105 mm.
-
-
Duty
Standard duty., Heavy duty., Extra heavy duty.
-
-
Accessories
Not required., Keying options to suit required plastering applications., Eaves lintel., Cant brick., Powder coating., Soffit cladding., Universal arch., Weep holes., Stop ends.
-
-

Sustainability data

Material
Steel, Stainless steel
-
-
Recyclability
100% Recyclable
-
-