| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 580 x 620 x 820 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
| Product net weight | 12 kg | |
|---|---|---|
| Maximum static user load capacity | 100 kg | |
| Height adjustment position count | 6 | |
| Seat depth adjustment position count | 4 | |
| Seat foam thickness | 50 mm | |
| Foam density | 45 kg/m³ | |
| Foam rebound rate | 55% | |
| 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 backrest contact surface | Soft-touch matte polyurethane padding | |
|---|---|---|
| Seat and backrest support shell | Injection-molded polypropylene | |
| Height adjustment support post | Powder-coated carbon steel | |
| Stabilizing base chassis | Glass-fiber reinforced polypropylene | |
| Caster wheels | Thermoplastic rubber over polypropylene hub | |
| Adjustment locking hardware | Zinc-plated steel bolts and latch pins | |
| Seat height adjustment column | Cold-rolled steel with ratchet lock | |
| Base floor contact pads | Non-slip thermoplastic rubber | |
| 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 height ratchet adjustment | Lift seat to lock at preset heights between 340mm and 550mm floor clearance | |
|---|---|---|
| Backrest height ratchet adjustment | Slide backrest along post to positions between 730mm and 920mm floor height | |
| Seat depth sliding adjustment | Slide seat pan forward up to 80mm to match child leg length | |
| Gravity-activated braking casters | Lock automatically when child is seated to prevent unwanted movement | |
| Contoured backrest support | Curved spine-aligned shape to support upright sitting posture | |
| Integrated backrest hanger tab | Molded top tab for hanging backpacks or clothing | |
| 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
| Home children's study space | Matches height-adjustable study desks for growing children aged 14 years | |
|---|---|---|
| Classroom student seating | Suitable for primary and middle school adjustable desk setups | |
| After-school tutoring center use | Durable easy-clean surface supports frequent daily use by multiple children | |
| Homework and reading station | Ergonomic support reduces slouching during long seated study sessions | |
| Color-coordinated child room setup | Three color options match bright child bedroom or study room decor | |
| 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
| Applicable safety standard EN 1729-1:2015 | Functional and safety requirements for educational seating for children | |
|---|---|---|
| Applicable stability standard EN 1022:2018 | Stability test method for domestic and contract seating |
Standards applicable to China-market projects
| Applicable safety standard GB 28007-2011 | General safety requirements for children's furniture, mandatory for structural and edge safety | |
|---|---|---|
| Applicable material standard GB/T 3324-2017 | General technical requirements for wooden and plastic furniture for surface finish durability |
This product must meet the following technical requirements: 1. Applicable safety standard GB 28007-2011: General safety requirements for children's furniture, mandatory for structural and edge safety; 2. Applicable material standard GB/T 3324-2017: General technical requirements for wooden and plastic furniture for surface finish durability; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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