| Door Leaf Width | 600–1,000 mm for a single interior door; wider sizes may require reinforced profiles or a double-leaf design. | Confirm the clear opening, finished wall opening, frame-to-frame size, and whether the stated width is nominal or actual. | Dimensioned shop drawing showing door leaf, frame, clear passage, hinge position, and opening direction. | Custom sizes are commonly available; oversized leaves should be confirmed before quotation. | Verify |
| Door Leaf Height | 2,000–2,400 mm is a common interior range; full-height designs can extend higher when structurally supported. | Specify the finished-floor reference, ceiling condition, transom requirement, and tolerance for installation. | Elevation drawing with finished floor level, frame height, transom or sidelight dimensions, and allowable tolerance. | Height above approximately 2,400 mm may affect packing, handling, reinforcement, and freight planning. | Verify |
| Frame Depth | Common frame depths are approximately 70–150 mm, depending on wall thickness and the selected frame system. | Match the frame depth to the actual finished wall, including tile, stone, plasterboard, paint, and skirting. | Section drawings, wall-jamb detail, architrave dimensions, installation clearance, and adjustment range. | Wall-thickness mismatch is a frequent cause of site rework. | Verify |
| Aluminum Alloy | 6063-T5 or 6063-T6 is commonly used for extruded architectural profiles; the exact grade depends on the profile and design load. | Require the alloy and temper to be stated in the technical specification rather than accepting only “high-quality aluminum.” | Material declaration, mill certificate where required, profile wall-thickness schedule, and extrusion drawings. | Typical visible profile wall thickness may be about 1.2–2.0 mm; confirm by approved drawing. | Verify |
| Surface Finish | Powder coating, anodizing, wood-effect sublimation, and PVDF coating are common finish options. | Define color reference, gloss level, texture, exposed-surface coverage, and acceptable shade variation. | Finish sample, color reference, coating thickness report, pretreatment description, and batch-control procedure. | Powder-coated surfaces are often specified at approximately 60–120 μm, subject to the coating system and standard. | Verify |
| Panel Construction | Typical options include aluminum honeycomb, aluminum composite construction, glass, or aluminum-faced insulated panels. | Confirm the core material, panel thickness, flatness, impact resistance, moisture resistance, and repairability. | Cross-section drawing, panel composition, adhesive or fixing method, weight per square metre, and test data where applicable. | Panel thickness commonly falls around 20–45 mm, but the complete door thickness must be approved. | Verify |
| Glass Option | Where glazing is used, laminated or toughened safety glass may be specified according to location and local code. | State glass type, thickness, safety classification, edge treatment, spacer, seal, and privacy requirement. | Glass certificate, safety-glazing test report, glazing detail, and declaration of performance where applicable. | Typical interior glazing may use 6–12 mm glass, but the required thickness depends on size and safety design. | Code-Based |
| Hardware Set | Common hardware includes hinges, lock body, cylinder, lever handle, strike plate, seals, door closer, and pull handles. | Specify handing, backset, cylinder format, key system, handle finish, hinge load rating, and compatibility with local standards. | Hardware schedule, product data sheets, installation templates, spare-parts list, and corrosion-resistance information. | Hardware should be approved before mass production because cut-outs and machining are often hardware-specific. | Verify |
| Applicable Hardware Standards | Possible references include EN 12209 for mechanically operated locks, EN 1906 for lever handles, EN 1935 for single-axis hinges, and EN 1154 for controlled door closers. | Use only the standards relevant to the selected hardware and destination market; do not treat a standard reference as automatic certification of the complete door. | Valid test reports, certificate numbers, scope of application, product model, and laboratory information. | Standard applicability varies by country, building type, and hardware function. | Code-Based |
| Fire-Rated Requirement | Standard interior aluminum doors are not automatically fire-rated. Fire performance must be tested as a complete door assembly. | If required, specify the target classification, such as 30 or 60 minutes, and the exact wall and installation configuration. | Complete assembly fire-test report, classification report, approved hardware list, glazing approval, and installation instructions. | EN 1634-1 may be relevant in some projects, while other markets use different test methods and classifications. | Project-Specific |
| Acoustic Performance | Acoustic performance depends on the leaf, seals, frame, glazing, wall, and installation; a generic rating should not be assumed. | Set a required laboratory or field rating, such as Rw or STC, and test the complete door configuration. | Acoustic test report, test specimen description, perimeter seal details, threshold design, and installation method. | Higher acoustic targets normally require continuous seals, heavier construction, and tighter installation tolerances. | Project-Specific |
| Air, Water, and Wind | These performance categories are more typical for external doors, but may be requested for special interior environments. | Specify the required test method and performance class only when the project conditions justify it. | Test report, specimen size, test pressure, seal configuration, and installation limitations. | Interior doors generally do not require the same weather-performance data as exterior doors. | Optional |
| Certifications and Compliance | Requirements depend on the destination market. Possible documentation includes CE-related declarations for applicable regulated products, UKCA requirements where applicable, and local building-code evidence. | Identify the importing country and determine whether the complete door, glazing, hardware, or only specific components are regulated. | Declaration of performance or conformity where applicable, test reports, material declarations, safety data, and factory quality records. | CE marking is not a universal quality mark for every interior door; applicability must be confirmed for the exact product and market. | Verify by Market |
| Accessibility and Clear Passage | Many projects require a minimum clear opening; the exact value is governed by local accessibility regulations and building use. | Specify the required clear passage after the door leaf, frame, seals, and hardware are installed. | Accessibility schedule, opening-force requirement, threshold detail, and approved hardware arrangement. | Nominal door width must not be confused with the final clear opening. | Code-Based |
| Minimum Order Quantity | Typical planning ranges: 1 prototype or sample set; approximately 10–30 units for a small custom order; 50–200 units for repeat production. | Negotiate MOQ separately for standard sizes, custom sizes, special colors, glass, hardware, and fire-rated configurations. | Formal quotation showing MOQ by configuration, tooling charges, sample charges, and conditions for mixed sizes. | MOQ is supplier- and configuration-dependent, not an industry-wide fixed value. | Confirm |
| Sample and Approval | A physical sample or corner sample is recommended before mass production, especially for custom finishes and hardware. | Approve dimensions, color, surface quality, joint lines, handle position, seals, and packaging before releasing production. | Signed sample approval, approved shop drawings, finish sample, hardware sample, and deviation list. | Sample preparation commonly requires about 7–20 working days, depending on customization. | Confirm |
| Production Lead Time | Typical planning range is approximately 20–45 working days after drawing approval, deposit, and material confirmation. | Obtain a schedule that separates engineering, sampling, procurement, fabrication, inspection, and packing. | Production schedule, critical-path list, approval deadline, inspection date, and shipment-ready date. | Special finishes, imported hardware, glazing, and certification testing can extend the schedule. | Confirm |
| Inspection and Quality Control | Inspection may cover dimensions, diagonals, opening operation, surface finish, hardware installation, glass condition, and packaging. | Use agreed acceptance criteria and define inspection timing before shipment. | Inspection checklist, dimensional report, coating inspection record, nonconformity report, and photographic evidence. | Pre-shipment inspection is most effective after production is complete but before final packing. | Recommended |
| Packaging | Common protection includes foam, corner guards, individual wrapping, reinforced cartons, pallets, and moisture protection. | Require protection against abrasion, corner impact, water exposure, and mixed-hardware loss during international transport. | Packing specification, carton dimensions, gross and net weights, pallet plan, loading photos, and shipping marks. | Packaging dimensions and weights must be included in freight and container calculations. | Verify |
| Spare Parts and Warranty | Useful spare items include seals, rollers where applicable, screws, cylinders, handles, hinge components, and touch-up materials. | Define warranty scope, exclusions, response time, replacement procedure, and responsibility for installation-related damage. | Warranty terms, spare-parts price list, maintenance guide, installation manual, and troubleshooting instructions. | A written warranty should identify the product configuration and environmental limitations. | Confirm |
