| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| 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
| Total set net weight | 18 kg | |
|---|---|---|
| Desk top static load capacity | 50 kg | |
| Height adjustment positions | 5 positions per component | |
| Surface scratch resistance | 2000 abrasion cycles | |
| Design service life | 6 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 | |
| Five-star Base Static Load Reference | Acceptance target ≥120 kg; chair reference load 150 kg | |
| Caster Rolling Durability Reference | Acceptance target 30000 cycles |
Core acceptance fields · Panels / hardware / frame / upholstery
| Desk top and seat/back panels | 18mm thick E1 grade particleboard with light wood grain melamine laminate, PVC edge banding | |
|---|---|---|
| Support frame | 1.2mm thick cold-rolled steel with white electrostatic powder coating | |
| Height adjustment fasteners | Zinc-plated steel bolts and lock nuts | |
| Under-desk storage bin | 0.8mm thick cold-rolled steel with white powder coating, open front design | |
| Backrest support frame | 15mm diameter round bent steel tube with matching white powder coating | |
| Floor contact pads | Injection-molded non-slip black rubber, fitted to frame foot ends | |
| Edge trim on panels | 2mm thick PVC impact-resistant edge banding, rounded corners | |
| 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 | |
| Five-star Base Material Thickness | Metal base wall 3.5 mm; diameter 700 mm |
Adjustment / rotation / tilt / mobility / storage features
| Stepped height adjustment | Tool-enabled bolt adjustment for both desk and chair, with 30mm increments between positions | |
|---|---|---|
| Integrated under-desk storage | Open-front fixed metal bin for storing stationery, notebooks and personal school items | |
| Connected fixed structure | Desk and chair share a common cantilever steel base to prevent tipping and separate movement | |
| Non-slip floor stabilization | Rubber foot pads on all 6 base contact points to reduce sliding and protect hard flooring | |
| Ergonomic back support | Curved tubular backrest frame with rigid panel to support natural lumbar curve during study | |
| Anti-pinch safety design | Rounded PVC edges on all panels with no exposed sharp metal edges | |
| Recline Angle / Lock Reference | 125° with 3suggested lock positions | |
| Tilt Tension User-weight Range | Reference adjustment coverage 120 kg | |
| 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
| K-12 standard classrooms | Sized for individual student use in public and private school classroom layouts, supporting 500mm row spacing | |
|---|---|---|
| Tutoring and training centers | Durable easy-to-clean construction suitable for high-turnover after-school training facilities | |
| Home study spaces for children | Adjustable height adapts to growing children for multi-year use in residential bedrooms or study rooms | |
| Exam and testing venues | Fixed connected structure prevents movement and supports secure, orderly exam room setups | |
| Temporary learning spaces | Lightweight robust construction suitable for temporary classroom setups in community or emergency facilities | |
| 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 | Applicable European standard for safety and strength requirements for educational furniture | |
|---|---|---|
| EN 1729-2:2015 | Applicable European standard for functional dimensions of school chairs and desks |
Standards applicable to China-market projects
| GB/T 3976-2014 | Applicable standard for functional sizes of student desks and chairs for primary and secondary schools | |
|---|---|---|
| GB 18580-2017 | Applicable standard for formaldehyde emission limits for wood-based panel components | |
| GB/T 3324-2017 | Applicable general technical standard for metal furniture durability and safety |
This product must meet the following technical requirements: 1. GB/T 3976-2014: Applicable standard for functional sizes of student desks and chairs for primary and secondary schools; 2. GB 18580-2017: Applicable standard for formaldehyde emission limits for wood-based panel components; 3. GB/T 3324-2017: Applicable general technical standard for metal furniture durability and safety; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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