Smiths Architectural Hinge DBB Grade 13 Satin 4 x 3 1 Pair

Smiths Architectural Hinge DBB Grade 13 – Satin Finish (4″ x 3″) – 1 Pair

High-Performance Door Hinges for Commercial and Residential Applications

Product Overview

The Smiths Architectural Hinge DBB Grade 13 Satin 4″ x 3″ (supplied as 1 pair) is a premium-quality, high-strength butt hinge designed for demanding environments where performance, reliability, and compliance are critical. Manufactured to Grade 13 standards, this hinge pair is suitable for use on fire doors, heavy-duty commercial doors, and high-traffic areas, offering durability, smooth operation, and architectural appeal.

The satin stainless steel finish provides both aesthetic appeal and resistance to corrosion, making it ideal for modern interiors in public, commercial, or private settings. Engineered for strength and longevity, this hinge is CE marked and complies with the necessary UK and European performance standards for fire-rated doors.

Key Features

• Grade 13 Performance: Designed to meet the requirements of Grade 13 under BS EN 1935, capable of supporting doors up to 120kg with appropriate hardware and fixings.

• High Load-Bearing Capacity: Suitable for heavy and frequently used doors, including fire doors in commercial or institutional settings.

• Satin Stainless Steel Finish: Provides a clean, modern look while offering enhanced resistance to corrosion and wear.

• Standard Size – 4″ x 3″: Universal fitting size that is compatible with most timber and metal doors. Dimensions approximately 102mm x 76mm.

• Supplied as 1 Pair: A complete set includes 2 hinges suitable for fitting one door. Screws and fixings typically included.

• Fire Door Compatible: When installed with suitable intumescent hinge pads, this hinge contributes to FD30 and FD60 fire door compliance.

• Durable Bearing Mechanism: Incorporates fixed or ball bearing mechanisms for smooth, long-lasting door operation without squeaking or seizing.

• Concealed Fixings: Clean installation appearance, designed for flush fitting with no protruding parts when the door is closed.

• Versatile Application: Ideal for commercial buildings, schools, offices, hospitals, and high-end residential projects.

Product Specifications

Recommended Applications

• Fire Doors (FD30/FD60)

• Heavy Timber or Solid Core Doors

• Public Buildings & Facilities

• Office Partitions & Entryways

• High-Traffic Residential Doors

• Educational and Medical Institutions

This hinge is especially suited for doors where durability, fire safety, and a professional appearance are required.

Installation Tips

1. Determine Hinge Positioning: Standard installation uses three hinges per door. Ensure even spacing with one hinge 150mm from the top, one 230mm from the bottom, and one centered.

2. Prepare Recesses: Mortice the door and frame accurately to match hinge thickness for a flush fit.

3. Use Intumescent Pads: For fire-rated doors, install intumescent hinge pads behind the hinge leaf to maintain the door’s fire certification.

4. Secure with Appropriate Screws: Use the provided screws or equivalent that suit the door material (wood, composite, etc.).

5. Check Operation: Ensure smooth, bind-free operation before final tightening.

Frequently Asked Questions (FAQs)

Q: What does Grade 13 mean?

Grade 13 is a classification under BS EN 1935, indicating that the hinge is suitable for severe duty use and can support a door weighing up to 120kg when three hinges are fitted. It’s a high-standard hinge suitable for commercial and fire-rated applications.

Q: Can I use these on a fire door?

Yes, but you must install intumescent hinge pads behind each hinge leaf to ensure the assembly meets FD30 or FD60 fire door requirements.

Q: Are fixings included?

Typically, yes. However, we recommend verifying the packaging contents or product listing to confirm if screws are supplied. Always use high-strength screws suited for your door frame material.

Q: Is this hinge suitable for external doors?

While it is corrosion-resistant due to the satin stainless steel finish, it is primarily designed for internal use. For exterior applications, consider weather-resistant hinges made of marine-grade stainless steel (e.g., Grade 316).

Q: What tools do I need to install these hinges?

You’ll need a drill, screwdriver, chisel (for morticing), measuring tape, and optionally a hinge jig for precise placement.

Why Choose Smiths Architectural?

Smiths Architectural is a trusted name in premium architectural hardware. This Grade 13 Satin Hinge reflects our commitment to durability, fire safety, and aesthetic quality. Ideal for professionals, contractors, and property developers who demand compliance and longevity in their installations.