| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Per-seat overall unit size (installed) | 540 x 600 x 900 mm | |
|---|---|---|
| Seat width | 500 mm | |
| Seat depth | 460 mm | |
| Seat height from finished floor | 450 mm | |
| Fixed writing tablet width (per seat) | 520 mm | |
| Fixed writing tablet depth | 300 mm | |
| Writing tablet height from finished floor | 760 mm | |
| Writing tablet thickness | 25 mm | |
| Backrest height above seat | 450 mm | |
| Privacy divider panel height | 350 mm | |
| T-base floor anchor plate length | 355 mm | |
| Recommended center-to-center row spacing | 1000 mm | |
| T-leg vertical support height | 750 mm | |
| Finished Seat Cushion Thickness | 90 mm | |
| Backrest Padding Thickness | 70 mm | |
| Lumbar Support Zone Height | 240 mm |
Net weight / load capacity / users / durability
| Per-seat net weight (including hardware) | 28 kg | |
|---|---|---|
| Seat static load capacity | 150 kg | |
| Floor anchor pull-out resistance | 12 kN | |
| Seat return mechanism cycle life | 100000 cycles | |
| Surface scratch resistance (writing tablet) | Grade 1 | |
| Recommended maximum user weight | 120 kg | |
| Frame corrosion resistance salt spray test duration | 48 h | |
| Seat Foam Density / Rebound Reference | 45 kg/m³ / 65% | |
| Back Foam Density Reference | 38 kg/m³ | |
| Upholstery Thickness / Abrasion Reference | 1.4 mm / 50000 cycles |
Core acceptance fields · Panels / hardware / frame / upholstery
| Structural frame and supports | 2.0 mm thick cold-rolled steel tube with matte black powder coating | |
|---|---|---|
| T-base floor anchors | 4 mm thick steel plate with anti-slip rubber caps | |
| Fixed writing tablet substrate | 25 mm thick multilayer plywood with HPL fireproof laminate surface and aluminum edge trim | |
| Seat and backrest shells | 15 mm thick fireproof multilayer composite board with yellow wear-resistant finish | |
| Inter-seat privacy dividers | Curved black steel-framed mesh panels with 18 mm thick edge trim | |
| Seat return mechanism hardware | Carbon steel torsion spring and polymer damping components | |
| Floor mounting fasteners | M8 x 80 mm stainless steel expansion anchor screws with black plastic caps | |
| Under-seat book rack (optional standard) | 0.6 mm thick cold-rolled steel wire mesh with black powder coating | |
| Seat Internal Support Board Thickness | 14 mm bent plywood or equivalent support board | |
| Backrest Internal Frame Thickness | 14 mm bent plywood/composite reinforced frame | |
| Gas-lift Engineering Specification | Recommended Class 4; outer tube 50 mm; stroke 100 mm | |
| Tilt Mechanism Plate Thickness | 2.5 mm cold-rolled steel |
Adjustment / rotation / tilt / mobility / storage features
| Seat operation | Gravity-activated self-rising return that lifts seat upright when unoccupied, no manual operation needed | |
|---|---|---|
| Writing surface use | Fixed non-folding, non-rotating curved work surface permanently mounted to the seat frame for continuous writing access | |
| Privacy separation | Curved mesh dividers between adjacent seats block side sightlines to reduce distraction during lectures | |
| Floor installation | Permanent anchor mounting to tiered sloped or flat lecture hall floors via T-base steel plates for structural stability | |
| Row configuration | Modular linear row assembly with shared support legs between adjacent seats for uniform tiered sightlines | |
| Under-seat storage | Fixed steel wire rack under each seat holds books, bags and personal items during sessions | |
| Noise damping | Polymer bushings on return mechanism eliminate metal impact noise when seats return to upright position | |
| Recline Angle / Lock Reference | 125° with 3suggested lock positions | |
| Tilt Tension User-weight Range | Reference adjustment coverage 120 kg | |
| Height Adjustment Stroke | 100 mm continuous travel | |
| Rotation / Mobility Configuration | 360° swivel with 5-caster multidirectional movement |
Verified carton / gross weight / assembly / loading data
| Reference Package Count | 1 set / 2 cartons | |
|---|---|---|
| Reference Assembly Time | 40 minutes per set | |
| Reference Carton Dimensions | 850× 420× 720 mm | |
| Reference Packaged Gross Weight | 23 kg/set | |
| Reference Carton Volume | 0.26 m³/set | |
| Indicative 20GP Loading | 135 sets at 85% space utilization | |
| Indicative 40HQ Loading | 320 sets at 85% space utilization |
Recommended spaces / users / usage modes
| Tiered university lecture halls | Fixed row configuration provides unobstructed sightlines on sloped floors for large class instruction | |
|---|---|---|
| Corporate training auditoriums | Integrated writing tablets support note-taking, laptop use and training material placement for long sessions | |
| Government and institutional conference halls | Durable fixed construction and quiet operation suit high-traffic formal meeting and presentation spaces | |
| K-12 school multi-purpose auditoriums | Sturdy fire-resistant materials and under-seat storage meet daily school assembly and class use demands | |
| Examination and testing venues | Inter-seat privacy dividers reduce visual cheating risk during formal written assessments | |
| Public continuing education centers | Ergonomic seat height and work surface support comfortable extended seated use for adult learners | |
| Recommended Matching Desk Size | 2.4 m executive desk | |
| Reference Daily Use Duration | 8 hours/day; confirm by ergonomic testing |
EU Market Access Requirements* EN Standards
| EN 12727:2000 | Applicable to strength, durability and safety requirements for fixed auditorium and lecture hall seating | |
|---|---|---|
| EN 1022:2018 | Applicable to seating stability evaluation for floor-fixed public seating installations | |
| EN 13501-1:2018 | Applicable to fire reaction classification of construction materials used in seat components |
Standards applicable to China-market projects
| GB/T 3325-2017 | Applicable to metal furniture general technical requirements for structural strength, coating adhesion and stability | |
|---|---|---|
| GB 20286-2006 | Applicable to fire retardant requirements for materials in public assembly venue seating components | |
| GB/T 10357.3-2013 | Applicable to furniture mechanical performance test methods for seat and back static/durability loading |
This product must meet the following technical requirements: 1. GB/T 3325-2017: Applicable to metal furniture general technical requirements for structural strength, coating adhesion and stability; 2. GB 20286-2006: Applicable to fire retardant requirements for materials in public assembly venue seating components; 3. GB/T 10357.3-2013: Applicable to furniture mechanical performance test methods for seat and back static/durability loading; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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