| 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 unit net weight | 18 kg | |
|---|---|---|
| Desktop static load capacity | 80 kg | |
| Adjustable height positions | 4 | |
| Anti-tip stability load | 40 kg | |
| Design service life | 6 years | |
| Foot pad slip resistance coefficient | 0.6 | |
| 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 |
Core acceptance fields · Panels / hardware / frame / upholstery
| Frame structure | 1.2mm thick powder-coated white steel tube | |
|---|---|---|
| Desktop panel | 18mm thick particleboard with light wood-grain laminate | |
| Seat panel | 15mm thick particleboard with medium wood-grain laminate | |
| Backrest panel | 12mm thick particleboard with light wood-grain laminate | |
| Edge trim | 2mm thick red PVC edge banding | |
| Adjustment collars | Reinforced black plastic | |
| Floor contact pads | Non-marking black rubber | |
| Under-desk storage shelf | 0.8mm thick white painted steel sheet | |
| Fasteners | Zinc-plated steel bolts and nuts | |
| 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 |
Adjustment / rotation / tilt / mobility / storage features
| Synchronized height adjustment | Desk and seat height adjust together via 4 locking positions | |
|---|---|---|
| Under-desk open storage | Fixed steel tray below desktop holds notebooks and stationery | |
| Cantilever back support | Fixed curved steel frame provides passive lumbar support | |
| Anti-tip base design | Wide splayed steel legs with rubber pads prevent forward or sideways tipping | |
| Edge impact protection | PVC edge trim absorbs bumps and prevents panel chipping | |
| Floor protection function | Rubber foot pads slide quietly without scratching hard flooring | |
| 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 classroom application | Suitable for primary and middle school daily teaching use | |
|---|---|---|
| Tutoring center use | Ideal for after-school training institutions and small class settings | |
| Home study space use | Suitable for home children's study areas | |
| Library reading area use | Appropriate for public library children's reading zones | |
| 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 educational furniture safety and strength | |
|---|---|---|
| EN 1729-2:2012 | Applicable European standard for educational furniture functional dimensions |
Standards applicable to China-market projects
| GB/T 3976-2014 | Applicable standard for functional sizes of school desks and chairs for K-12 education | |
|---|---|---|
| GB 28007-2011 | Applicable general safety requirement for children's furniture |
This product must meet the following technical requirements: 1. GB/T 3976-2014: Applicable standard for functional sizes of school desks and chairs for K-12 education; 2. GB 28007-2011: Applicable general safety requirement for children's furniture; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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