Smiths Architectural DBB Grade 13 Hinge Polished Stainless Steel (4″ x 3″) 1 Pair

High-Performance Fire-Rated Hinges for Commercial & Residential Use

Product Overview

The Smiths Architectural DBB Grade 13 Hinge in polished stainless steel is a premium-grade architectural hinge built to meet the demands of both style and structural integrity. Suitable for fire doors, heavy-use environments, and high-traffic zones, this hinge delivers exceptional strength, reliability, and a striking polished finish for contemporary aesthetics.

Manufactured to BS EN 1935 Grade 13 standards, this hinge supports doors up to 120kg (when three hinges are fitted), making it ideal for commercial premises, public buildings, and premium residential applications.

Key Features

• Grade 13 Certified
  Tested and certified to BS EN 1935, ensuring the hinge can support heavy doors and is suitable for severe duty usage.

• Fire Door Compatible
  Suitable for use on FD30 and FD60 fire doors when installed with intumescent hinge pads (sold separately), making it a crucial component in fire safety compliance.

• Highly Polished Stainless Steel Finish
  Offers a sleek, reflective surface that complements both modern and traditional interiors. The polished surface also enhances resistance to tarnish and corrosion.

• Standard 4 x 3 Dimensions
  Universally accepted size of 102mm x 76mm ensures compatibility with a wide range of door types and frames, whether timber or metal.

• Heavy-Duty Load Capacity
  Designed to handle doors weighing up to 120kg, making it perfect for solid-core, fire-rated, or frequently used doors.

• Durable Bearing Mechanism
  Incorporates double ball bearing technology for smooth, long-term operation without squeaks or sagging. This ensures longevity even under frequent use.

• Sold as 1 Pair (2 Hinges)
  Typically suitable for one standard internal or fire door. Heavy doors may require three hinges for optimal support.

• Clean, Concealed Fixings
  The screw holes are precisely positioned to allow for flush installation, maintaining a seamless and professional appearance.

Product Specifications

Applications

• Fire-rated doors (FD30 or FD60 compliant)

• Commercial door sets in offices, schools, hospitals, hotels

• High-traffic internal doors in retail or public settings

• Heavy timber doors or solid-core doors in residential builds

• Premium installations where aesthetics and safety are both essential

Installation Guidance

1. Mark and Mortice: Accurately measure and mortice the door and frame to flush-fit the hinge leaf.

2. Use Intumescent Pads: Always use fire-rated intumescent hinge pads behind each hinge on fire doors.

3. Screw and Align: Secure using appropriate screws (typically included). Align the door evenly to ensure smooth operation.

4. Test Movement: After installation, test door swing to confirm smooth and unhindered motion.

Frequently Asked Questions (FAQs)

Q: What does Grade 13 indicate?

Grade 13 under BS EN 1935 refers to the highest strength rating for architectural hinges. It supports doors up to 120kg when three hinges are installed and is suitable for severe-duty environments like commercial and public buildings.

Q: Can I use these on fire doors?

Yes. These hinges are fire door compatible when installed with intumescent hinge pads, which expand in the event of a fire to seal the hinge gap and maintain the integrity of the fire door assembly.

Q: Are fixings included in the box?

Typically, standard fixings (screws) are included with the product. However, always verify your pack contents or consult with the supplier before installation.

Q: Is the polished stainless steel suitable for external use?

While polished stainless steel offers good corrosion resistance, these hinges are primarily designed for interior or sheltered exterior use. For harsh outdoor conditions, consider marine-grade (316) stainless steel options.

Q: How many hinges do I need per door?

Most doors require three hinges for fire rating compliance and stability. This set includes two hinges, so an additional hinge may be needed for heavier or taller doors.

Why Choose Smiths Architectural Hinges?

Smiths Architectural is synonymous with precision, quality, and durability. Their DBB Grade 13 Hinges are engineered to meet the highest standards of fire safety, load capacity, and aesthetics. Whether you’re fitting out a commercial space or a high-end residential project, these hinges offer the perfect balance of function and finish.