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Ultra Heavy Duty Cavity Wall Lintel

Cavity: 150-165mm

Wide Inner Leaf: 125-140mm

Outer Leaf: 100mm

Should be laterally restrained and propped during installation.



  • We are the only lintel manufacturer to hot-dip galvanize after fabrication providing up to 50% more zinc protection than other approved coatings.
  • Supergalv coating offers a superior life expectancy
  • On top of our industry-leading performance, you’ll also enjoy the unlimited support of our entire technical team, free of charge.


Length 750-2100 2250-3300 3450-4200 4350-4800 4950-5100
L (kN) 100 80 70 60 45
W (kg/m) 34.8 34.8 34.8 34.8 34.8
H (mm) 237 237 237 237 237

(L) Load SWL/UDL value (W) Weight (H) Height 

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Brand Birtley
Generic Ref SX150/130
Product Range Cavity Wall Lintels
Product Sub-range 150-165mm Cavity Wide Inner Leaf
Product Type Ultra Heavy Duty Cavity Wall Lintel - 100mm Outer leaf/125-140mm Inner Leaf
European Standard/ETA BS EN845-2:2013+A1:2016
Test Standard EN846-9:2000/2016
Notified Body Lucideon Ltd (NB 1289)
DoP Ref BIR538CPR2014
Material Mild Steel S275JR to BS EN10025-2:2004
Coating/Finish/Colour 65µm Hot Dip Galvanized to BS EN ISO 1461:2009
Thermal Performance Contact us for information
Insulation Expanded Polystyrene - BREEAM rating A+
Fire Rating 60 mins (with 2 coat plaster finish)
1. Installation requirement Bed fully on bricklaying mortar
2. Installation requirement Must be used with a cavity tray - External walls only
3. Installation requirement Not suitable for point loads or concrete floors
4. Installation requirement 150mm Minimum end bearing
Sales Qty 1
Packaging weight 0
1. Features Supergalv coating offers superior life expectancy
2. Features Post-fabrication galvanizing leaves no surface with inferior paint protection
3. Features Lack of baseplate and factory fitted insulation reduces thermal bridging
4. Features Structural grade steel to EN10025
Option 1 Alternative material options: Ultragalv coating (150µm), Stainless Steel 1.4301 (304)
Option 2 Outer Leaf Options: Render mesh (MF)

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