bespoke fire-rated steel doors
Fire safety should never mean compromising on beautiful design. At Mammoth Steel, we offer bespoke fire-rated steel doors that combine refined architectural styling with tested fire-resistance performance.
As an authorised dealer for specialist European manufacturer Portamet, we supply and install premium steel-framed fire door systems for residential, commercial and architectural projects throughout the UK.
Our collection includes FD30 and FD60 fire-rated steel doors, alongside specialist EI30, EI60 and EI90 systems and EI120 fire-rated glazing solutions, subject to the requirements and approved specifications of each project.
From elegant glazed doors in luxury homes to specialist fire-resistant doors and partitions for offices, hotels and commercial developments, we help clients explore solutions that balance safety, functionality and timeless design.
Based in Cheshire and working with clients throughout the UK, Mammoth Steel welcomes enquiries from homeowners, architects, builders and developers.
Contact us today for a free, quick and easy quote.
Our fire-rated steel door design
Combining precision engineering with sophisticated architectural design, our bespoke fire-rated steel doors offer solutions for projects where both safety and appearance matter.
Explore our FD-rated and EI-rated steel door systems, manufactured by Portamet to meet individual project specifications.
fd30 & fd60 fire-rated steel doors.
Beautifully designed steel doors offering 30 or 60 minutes of tested fire resistance, depending on the specified doorset.
The FD30 and FD60 range combines elegant steel profiles with specialist fire-rated glazing, creating contemporary door systems for residential and commercial interiors.
Available in bespoke sizes, glazing arrangements and finishes, with single and double-door options, these systems are suited to projects where architectural appearance and fire safety must work together.
ei30, ei60, ei90 & ei120 frie-rated steel doors
Specialist steel and glass systems designed for demanding architectural and commercial environments.
EI-rated systems provide tested fire integrity and insulation performance, with classifications covering 30, 60 and 90 minutes for suitable door configurations. Specialist EI120 glazed partition solutions are also available.
Manufactured using advanced steel profile systems, these products combine fire-resistant glazing, durable steel construction and contemporary architectural styling.
The appropriate system and configuration will depend on your project’s fire strategy, technical requirements and supporting certification.
From concept to completion
Every fire-rated steel door project requires careful planning. At Mammoth Steel, we work with our specialist manufacturing partner to help bring together architectural design, technical requirements and precision manufacturing.
step 1. the design & specification
We begin by discussing your project, reviewing available drawings and understanding the required fire-resistance rating, dimensions, glazing and design preferences.
The proposed specification must be checked against the building’s fire strategy and applicable requirements.
step 2. precision fabrication
Once the specification has been agreed and verified, your fire-rated steel door system is manufactured by Portamet using the appropriate steel profiles, glazing and components.
Each proposed configuration must be supported by the relevant fire-test or classification documentation.
step 3. expert installation
We help coordinate the next stages of your project, including delivery requirements and installation arrangements.
Fire-rated doors must be installed by competent professionals in accordance with the approved system details and manufacturer’s instructions to preserve their tested performance.
Frequently asked questions
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FD30 and FD60 are UK fire-door classifications referring to 30 and 60 minutes of tested fire resistance respectively.
The correct rating depends on your building’s fire safety requirements, intended use and the specification of the complete doorset.
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EI is a fire-resistance classification covering both integrity and insulation.
The number indicates the duration of tested performance in minutes. For example, EI30 provides 30 minutes of fire integrity and insulation, while EI60 and EI90 provide 60 and 90 minutes respectively.
Specialist EI120 glazed systems may also be available for suitable applications.
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Yes. Portamet offers fire-rated steel door systems incorporating specialist fire-resistant glazing.
This allows natural light to pass between spaces while providing the specified fire-resistance performance.
Glazing types, sizes and layouts must remain within the approved specification for the chosen system.
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Yes. Our Portamet fire-rated steel door range includes bespoke configurations, with options for dimensions, finishes and glazing arrangements.
However, unlike standard decorative steel doors, fire-rated systems must remain within their tested and approved design limitations.
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Yes. Mammoth Steel is based in Cheshire and welcomes enquiries for residential, commercial and architectural projects throughout the UK.
Contact us with your drawings, required fire rating and project details, and we’ll help you explore suitable fire-rated systems.
let’s create something exceptional
Considering fire-rated steel doors for your home or commercial project?
Whether you’re planning a residential renovation, commercial development or specialist architectural project, we’d love to hear about your requirements.
At Mammoth Steel, we work with Portamet to offer beautifully designed steel door systems with fire-resistance specifications tailored to suitable applications.
Contact us to discuss your project, explore the available systems and request a bespoke quotation.
Expertly designed. Precision fabricated. Safety by design.