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Standard/Medium Duty Cavity Wall Lintel 

Cavity: 50-85mm

Outer Leaf: 100mm

Inner Leaf: 100mm 



  • 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
  • Our in-house team of accredited thermal modelers will carry out bespoke thermal bridging assessments on request.


Length 750-1500 1650-2100 2550-3000
L (kN) 36 36 36
W (kg/m) 10.1 14 14.4
H (mm) 155 207 215

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


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Brand Birtley
Generic Ref CB50HD
Product Range Cavity Wall Lintels
Product Sub-range 50-65mm Cavity
Product Type Standard/Medium Duty Cavity Wall Lintel - 100mm Inner leaf/100mm Outer Leaf
European Standard/ETA BS EN845-2:2013+A1:2016
Test Standard EN846-9:2000/2016
Notified Body TSUS (Notified Body No.1301)
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
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
5. Features Plaster key to inner leaf
Option 1 Alternative material options: Ultragalv coating (150µm), Stainless Steel 1.4301 (304)
Option 2 Outer Leaf Options: Reduced length flange (RFF), No rainwater drip (ND), Render mesh (MF)
Option 3 Inner Leaf Options: No plaster key (NM), Closer plate (CP)

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