| 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
| Per-seat static load capacity | 150 kg | |
|---|---|---|
| Unit weight per two-seat set | 65 kg | |
| Seat folding mechanism cycle life | 12000 cycles | |
| Recommended row spacing between installed units | 900 mm | |
| Maximum occupancy per two-seat unit | 2 adults | |
| 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
| Back panel and modesty panel | 18mm thick melamine-faced particle board, light oak finish | |
|---|---|---|
| Writing table surface | 25mm thick high-pressure laminate on particle board, scratch-resistant | |
| Side support frames | 2mm thick powder-coated steel, dark grey finish | |
| Seat and backrest cushion backing | High-impact polypropylene, dark grey finish | |
| Seat folding hinge hardware | Cold-rolled steel with zinc plating, rust-resistant | |
| Mounting base plates | 3mm thick steel with pre-drilled anchor holes | |
| Table edge banding | 2mm thick PVC edge band, matched to panel finish | |
| 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
| Gravity-operated foldable seat | Seat automatically lifts and stows flush to back panel when unoccupied | |
|---|---|---|
| Integrated writing tablet per seat | Fixed table surface positioned in front of each seat, no folding table motion | |
| Modular row connection system | Units connect end-to-end to form continuous straight lecture rows | |
| Floor-fixed installation | Steel base plates secure directly to concrete raised lecture hall floors with anchor bolts | |
| Raised modesty/row divider panel | Full-height panel between adjacent rows blocks sight lines between students | |
| No moving parts on writing surface | Fixed rigid work surface eliminates wobble during writing or laptop use | |
| 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 lecture halls and auditoriums | Fixed row seating suitable for stepped floor layouts with consistent row spacing | |
|---|---|---|
| Corporate training rooms and conference centers | High-density durable seating for multi-hour training and presentation events | |
| Exam halls for standardized testing | Individual separated seating with stable writing surface to support testing use | |
| Primary and secondary school multimedia classrooms | Durable construction withstands daily high-volume student use over long service life | |
| Government and institution conference auditoriums | Neutral professional finish matches formal public space interior design schemes | |
| 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 Chairs and tables for educational institutions Part 1: Functional dimensions | |
|---|---|---|
| EN 1729-2:2012 | Furniture Chairs and tables for educational institutions Part 2: Safety requirements and test methods | |
| EN 1022:2018 | Domestic furniture Seating Determination of stability |
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to panel components | |
|---|---|---|
| GB/T 24821-2009 | General requirements for classroom desks and chairs for educational institutions | |
| GB 18584-2001 | Indoor decoration and refurbishment materials limit of harmful substances in wood furniture |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to panel components; 2. GB/T 24821-2009: General requirements for classroom desks and chairs for educational institutions; 3. GB 18584-2001: Indoor decoration and refurbishment materials limit of harmful substances in wood furniture; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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