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