The Birtley Heavy Duty Internal Wall Box Lintel 100mm SB100HD is engineered for superior strength and durability, making it the ideal choice for single-leaf internal walls. Crafted from structural-grade mild steel (S275JR) and finished with a 65µm hot-dip galvanised coating, this lintel offers exceptional corrosion resistance and a long lifespan. Its robust design ensures a 60-minute fire rating when paired with a two-coat plaster finish, providing both safety and reliability. 

Birtley
Lintel

The Birtley Heavy Duty Internal Wall Box Lintel 100mm SB100HD is engineered for superior strength and durability, making it the ideal choice for single-leaf internal walls. Crafted from structural-grade mild steel (S275JR) and finished with a 65µm hot-dip galvanised coating, this lintel offers exceptional corrosion resistance and a long lifespan. Its robust design ensures a 60-minute fire rating when paired with a two-coat plaster finish, providing both safety and reliability. 

Birtley
Lintel
Ex VAT Inc VAT
Log in
CALL US ON
01625 322269
Basket
Call us on 01625 322269

Birtley Heavy Duty Internal Wall Box Lintel 100mm SB100HD

£43.00 £130.34
The Birtley Heavy Duty Internal Wall Box Lintel 100mm SB100HD is a high-strength, galvanized steel lintel designed for single-leaf internal walls. With a 60-minute fire rating and optional insulation, it’s a reliable choice for modern construction projects.

Delivery charges will vary depending on your location.

To find out delivery cost to your postcode, add the products your require to your basket and then review your basket, entering the delivery postcode

We look to dispatch all products same-day where possible, we use a close network of couriers we have worked alongside for a number of years and will share any and all shipping updates with you directly.

The Birtley Heavy Duty Internal Wall Box Lintel 100mm SB100HD is engineered for superior strength and durability, making it the ideal choice for single-leaf internal walls. Crafted from structural-grade mild steel (S275JR) and finished with a 65µm hot-dip galvanised coating, this lintel offers exceptional corrosion resistance and a long lifespan. Its robust design ensures a 60-minute fire rating when paired with a two-coat plaster finish, providing both safety and reliability. 

  • Supergalv coating offers superior life expectancy
  • Post-fabrication galvanising leaves no surface with inferior paint protection
  • Available in span lengths from 750mm to 3600mm.
  • Made from structural grade steel to EN10025

Built to Last: Superior Materials and Coating


The Birtley SB100HD lintel is constructed from high-quality mild steel (S275JR) to BS EN10025-2:2004, ensuring unmatched strength and durability. Its 65µm hot-dip galvanized coating, compliant with BS EN ISO 1461:2009, provides superior corrosion resistance, making it suitable for long-term use in demanding environments.
Post-fabrication galvanizing ensures every surface is fully protected, leaving no weak points. This meticulous process enhances the lintel’s lifespan, making it a cost-effective choice for builders and contractors.

Safety and Compliance: Fire Rating and Standards


The Birtley SB100HD lintel boasts a 60-minute fire rating when used with a two-coat plaster finish, ensuring compliance with safety regulations.

Versatile and Efficient: Optional Insulation


For projects requiring enhanced thermal performance, the Birtley SB100HD lintel is available with optional expanded polystyrene insulation. This addition improves energy efficiency and contributes to a BREEAM rating of A+, making it an eco-friendly choice for sustainable construction.

Easy Installation: Designed for Builders


The Birtley SB100HD lintel is designed for straightforward installation. It must be fully bedded on bricklaying mortar and requires a 150mm minimum end bearing. For external walls, a cavity tray is essential to ensure optimal performance and longevity.

Why Choose Birtley Lintels?


Birtley Lintels are trusted by professionals across the UK for their exceptional quality and reliability. The SB100HD model combines robust materials, advanced coatings, and optional insulation to deliver a product that meets the highest standards of safety, durability, and efficiency.

Have a question?

If you have any questions about our products or would like to learn more about our shipping options please feel free to contact one of our team today.