| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall unit dimensions (4-seat row) | 2300 x 870 x 1000 mm | |
|---|---|---|
| Per-seat center-to-center width | 575 mm | |
| Seat surface height above floor | 450 mm | |
| Writing surface height above floor | 750 mm | |
| Seat panel dimensions | 450W x 500D x 15T mm | |
| Writing table top thickness | 30 mm | |
| Backrest panel dimensions | 517W x 490H mm | |
| Knee clearance under writing surface | 680 mm | |
| Floor mounting foot length | 325 mm | |
| End modesty panel height | 750 mm | |
| Seat flip-up angle | 90 degrees | |
| Support leg tube size | 40 x 80 mm | |
| Finished Seat Cushion Thickness | 90 mm | |
| Backrest Padding Thickness | 70 mm | |
| Lumbar Support Zone Height | 240 mm | |
| Clear Width Between Armrests | 540 mm |
Net weight / load capacity / users / durability
| Net weight per seat | 28 kg | |
|---|---|---|
| Recommended static load per seat | 150 kg | |
| Seat return cycle rating | 50000 cycles | |
| Surface abrasion resistance (writing top/seat) | 2000 cycles | |
| Formaldehyde emission grade (wood panels) | E0 (≤0.05mg/m³) | |
| Powder coating corrosion resistance | 48 hours neutral salt spray | |
| Warranty period | 5 years | |
| 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
| Seat and back panels | 15mm hot-pressed multilayer plywood with beech woodgrain laminate | |
|---|---|---|
| Continuous writing surface | 30mm particleboard core with double-sided fire-resistant beech laminate, 1.5mm PVC edge banding | |
| End modesty panel | 18mm MDF with matching beech laminate finish | |
| Support frame and brackets | 3mm thick cold-rolled steel with white electrostatic powder coat | |
| Floor mounting feet | Cast steel flanged feet with pre-drilled anchor holes, powder coated white | |
| Seat pivot hardware | Zinc-plated steel hinge pins with nylon damping bushings | |
| Edge trim | 1.5mm thick impact-resistant PVC edge banding, rounded corners for anti-collision | |
| Fasteners | Rust-proof hex expansion anchor bolts with white plastic dust covers | |
| 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-actuated automatic return to vertical stowed position when unoccupied, with anti-pinch damping | |
|---|---|---|
| Installation | Permanent floor mounting via expansion bolts through flanged feet, suitable for tiered/flat lecture hall floors | |
| Work surface access | Continuous shared front writing desk spans full row width for unobstructed note-taking and device placement | |
| Aisle clearance | Flip-up seats stow fully vertical to provide 300mm minimum clear aisle space per row | |
| Modesty panel function | Full-height end panel blocks leg visibility for end-row seats, provides structural rigidity for desk frame | |
| Seat locking | Seat locks automatically in both deployed (horizontal) and stowed (vertical) positions to prevent unintended movement | |
| Seat adjustment | Bracket mounting points allow 10mm vertical adjustment of seat height to compensate for uneven floor installation | |
| 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
| University/college lecture halls | Tiered fixed installation for large class sizes, durable for daily high-traffic student use | |
|---|---|---|
| Secondary school multimedia classrooms | Fixed row seating provides consistent sightlines for projection and lecture delivery | |
| Corporate training rooms | Permanent fixed seating for long-term training program use, low maintenance requirement | |
| Government/agency conference auditoriums | Formal fixed seating with integrated work surfaces for document review during meetings | |
| Public examination halls | Fixed individual positions with dedicated writing surfaces reduce cheating risks, durable for long exam sessions | |
| Installation notes | Requires concrete or reinforced raised flooring for secure bolt-down anchoring, not suitable for temporary or movable configurations | |
| 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 1729-1:2015 | Furniture for educational institutions, safety and strength requirements for seating and desks | |
|---|---|---|
| EN 13722:2004 | Performance requirements for fixed auditorium and lecture seating | |
| EN 1022:2018 | Domestic and institutional seating stability test method reference |
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to all wood panel components | |
|---|---|---|
| GB/T 3325-2017 | General technical requirements for metal furniture, applicable to steel frame and hardware | |
| GB 18580-2017 | Formaldehyde emission limits for wood-based panels, E0 grade recommended for indoor school use | |
| GB/T 3976-2014 | Functional sizes and technical requirements for school desks and chairs |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to all wood panel components; 2. GB/T 3325-2017: General technical requirements for metal furniture, applicable to steel frame and hardware; 3. GB 18580-2017: Formaldehyde emission limits for wood-based panels, E0 grade recommended for indoor school use; 4. GB/T 3976-2014: Functional sizes and technical requirements for school desks and chairs; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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