When sourcing steel fire doors, buyers often begin with a search for a 60 minute fire rated door or a 90 minute fire rated door. The time classification is important, but it does not describe every detail required for a suitable order. A door set must also match the project opening, supporting construction, hardware and the evidence accepted for its intended use.
This comparison helps contractors and procurement teams prepare a clearer enquiry. The required rating and other performance criteria should come from the approved project specification and applicable requirements, rather than being selected only from a product price list.
What does a 60 or 90 minute rating tell you?
A fire resistance or fire protection classification relates to an assembly assessed under a particular test and classification system. It is not simply the time a bare steel sheet resists heat. The door leaf, frame, glazing where present, hardware and installation details form part of the evaluated construction.
A time figure by itself does not prove that two products are equivalent. Review the standard, classification criteria and report scope. Fire integrity, insulation, temperature rise and smoke leakage can be separate requirements depending on the system and project. Do not assume that a 90 minute product automatically meets every requirement associated with a 60 minute specification.
Compare the quotation as a complete assembly
| Item | 60 minute enquiry | 90 minute enquiry |
|---|---|---|
| Required evidence | Report and accepted certification covering the specified configuration | Report and accepted certification covering the specified configuration |
| Dimensions | Confirm permitted size and leaf arrangement | Confirm permitted size and leaf arrangement separately |
| Frame and wall | Check frame construction, anchors and supporting wall scope | Check these details against the relevant report |
| Glazing | Confirm type, panel size and fixing details | Do not carry glazing assumptions over from another rating |
| Hardware | Approve hinges, closer, lock and any escape hardware | Approve the hardware combination for this assembly |
Fire rated doors with glass need a configuration check
A vision panel can help visibility in a corridor or service area, but cutting a panel into a solid door changes the construction. Specify the required glass type, panel dimensions, position and retention detail before approval. Ordinary glass cannot be substituted for the glazing specified in the evaluated assembly.
The permitted glass area may differ between systems and classifications. Ask the supplier to identify which evidence covers the proposed arrangement. A photograph of a glazed door or a catalogue description is not a substitute for that check.
Single leaf and double leaf fire doors
Double leaf steel fire doors can support wider access, but their meeting edges, hardware and closing sequence require attention. Clarify whether both leaves are active, which leaf opens first and how the inactive leaf is secured. Where a coordinator or other closing device is specified, confirm compatibility and include it in the hardware schedule.
For both single and double leaf arrangements, record the handing and clearance requirements on an approved drawing. Identify the door by location and reference number so packing labels, site delivery and installation can be matched to the door schedule.
What affects a steel fire door quotation?
Compare leaf and frame construction, dimensions, quantity, finish, glazing, hardware, packing and the documentation included. A leaf-only quotation is not directly comparable with a complete door set including frame and accessories. Confirm freight and installation responsibilities separately so the order scope remains clear.
For export projects, tell the supplier the destination and documentation requirements at enquiry stage. Request confirmation of the specific certification available for the offered product. Shenghao Doors should not be assumed to hold any particular international listing merely because a product is described as a fire door.
Prepare a specification pack before ordering
Provide a door schedule with location, opening dimensions, wall construction, required performance, leaf arrangement, handing, glazing and hardware. Add finish references, approved drawings, quantities and packing instructions. Agree on inspection points and sample approval before production.
Shenghao Doors supports steel door specification discussions and custom project enquiries. Confirm each proposed performance configuration and supporting documentation before order approval. Changes to the leaf, frame, glazing or hardware need review rather than an automatic carry-over of the original rating.
Frequently asked questions
Is a thicker steel fire door always better?
Thickness alone does not establish the classification. Evaluate the complete construction and its supporting evidence.
Can I add a different lock or closer?
Only after confirming that the proposed component and installation detail are compatible with the assembly and project specification.
Does a fire door also stop smoke?
Do not assume this from the fire time rating alone. Ask for the separate smoke-control requirements and evidence where needed.
Continue with our steel fire door specification guide and OEM steel fire door sourcing guide. Send your project schedule to Shenghao Doors for configuration review.
