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
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Birtley

Birtley Heavy Duty Internal Wall Box Lintel 100mm SB100HD

£46.00
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.

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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

Description

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

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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.

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Excellent 4.3 / 5
based on 983 reviews

Excellent Delivery Service

Order arrived early in morning, delivery staff were excellent and able to place order as close as possible to where I required it. excellent communication through out delivery and after delivery.

Rod Craik – 05 June

Great Experience

Great experience Really pleased with the way my order was dealt with and delivery arrived as advised.

Jim Brown – 23 May

Good product and service

Good product, reasonable price, great service and good customer follow-up. Would recommend and use again.

Gary Davies – 05 June

Great Company

Great company, great product. Delivery was very speedy and items was delivered professionally by a very helpful driver. Would highly recommend.

David Barrow – 27 May

Great quality wood and fast delivery

Great quality wood and fast delivery The company reached out to make sure that everything was good and the delivery went fine

Stephen Moseley – 31 May

Excellent service from a great company

Ordered 2T of midnight blue slate chipping (2 pallets of 50 bags each) Very nice product at a great price. Contacted quickly after order to arrange a suitable delivery date. Delivery was as arranged. Customer service is excellent including follow up call to ensure everything went well. All in all I would highly recommend Armstrong Cheshire.

Derrick Lohmann – 31 May

Great Customer Relations

Due to a mistake in communication ( mostly my mistake) the first delivery of bulk aggregate went to an address I used to live at. After asking to have a replacement delivery to the correct address Armstrong Cheshire re-scheduled the delivery within 3 days and with fantastic customer relations. I cannot recommend this company enough.

DAVID WHARTON – 20 May

Ultra Fast Delivery

Ultra fast delivery, technically superlative company, their products are light years ahead of all others. Unbelievable prices. I have been in construction for nearly 70 years now and am still working every day. This company is why I keep getting up in a morning. Thank you dear sirs/ Madam for making life easier

Anonymous – 16 June

Steel Lintel

Easy to pick product online, said 10 days delivery but got the product in 4 days, excellent service and prices

Mr. Ian Humphreys – 20 June

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