| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall unit dimensions (3-seat section) | 1740 x 850 x 1100 mm | |
|---|---|---|
| Seat center-to-center distance | 580 mm | |
| Seat height above finished floor | 465 mm | |
| Writing surface height above finished floor | 760 mm | |
| Minimum required row-to-row spacing | 900 mm | |
| Writing surface thickness | 18 mm | |
| Seat cushion foam thickness | 100 mm | |
| Floor mount foot plate dimensions | 390 x 65 x 5 mm | |
| Steel support frame tube wall thickness | 2.0 mm | |
| Rear modesty panel thickness | 17 mm | |
| Backrest panel dimensions | 760 x 500 x 17 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
| Single seat static vertical load capacity | 150 kg | |
|---|---|---|
| Seat pivot mechanism impact resistance | 85 kg | |
| Seat return mechanism noise level | 35 dB | |
| Recommended user weight capacity per seat | 120 kg | |
| Seat return mechanism cycle life | 50000 cycles | |
| Steel frame 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 | |
| Five-star Base Static Load Reference | Acceptance target ≥120 kg; chair reference load 150 kg |
Core acceptance fields · Panels / hardware / frame / upholstery
| Structural support frame | 2.0mm thick cold-rolled steel tube with matte black electrostatic powder coating | |
|---|---|---|
| Writing surface | 18mm thick high-density wood-composite core with fire-resistant laminate top, 2mm PVC edge banding | |
| Seat and back cushion fill | 45kg/m³ density high-resilience cold-cured polyurethane foam | |
| Seat and back upholstery | Abrasion-resistant flame-retardant polyester fabric, 50000 double-rub abrasion rating | |
| Rear modesty panel | 17mm thick high-density multilayer wood composite with matching laminate finish | |
| Under-seat book rack | 1.0mm thick cold-drawn steel wire welded mesh, black powder coated | |
| Seat return mechanism | Torsion spring with hydraulic damper, steel and aluminum pivot brackets | |
| Floor mounting hardware | M10 stainless steel expansion bolts for concrete floor anchoring | |
| Pivot hinge tubes | 19x14x2.0mm oval cold-rolled steel tubing for seat rotation points | |
| 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
| Seat automatic return | Spring-damper mechanism lifts seat to vertical position when unoccupied, soft close without impact | |
|---|---|---|
| Floor fixed installation | Bolt-down foot plates secure units permanently to tiered or flat concrete floors | |
| Continuous integrated writing surface | Fixed front-mounted desktop spans full row width for each seat, with integrated pen groove | |
| Under-seat open book storage | Wire mesh rack under each writing surface holds books, bags and personal items | |
| Rear row privacy modesty panel | Full-height panel between rows blocks leg visibility and provides back support | |
| Seat fold-up clearance | Seat folds 90 degrees vertical to increase aisle clearance when not in use | |
| Modular row configuration | Sections connect to form continuous rows of any length for lecture hall layouts | |
| 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 tiered lecture halls | Fixed forward-facing seating with integrated desks for large-class instruction, permanent installation | |
|---|---|---|
| Corporate training auditoriums | Durable high-density seating for repeated daily training sessions, easy egress between rows | |
| Conference center presentation rooms | Uniform tiered seating for clear sightlines to presentation stages, low maintenance | |
| K-12 school multimedia classrooms | Sturdy fixed seating with built-in storage for student supplies, long institutional service life | |
| Government and public assembly halls | Code-compliant fixed seating with high load capacity for public events, fire-rated materials | |
| 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 13761:2002 | Furniture - Seating for educational institutions, performance and safety requirements | |
|---|---|---|
| EN 1022:2018 | Furniture - Seating - Determination of stability, applicable to fixed floor-mounted units | |
| EN 12727:2000 | Furniture - Seating - Test methods for strength and durability of educational seating |
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to composite panel components | |
|---|---|---|
| GB/T 3325-2017 | General technical requirements for metal furniture, applicable to steel frame components | |
| GB 20400-2006 | Limit of harmful substances in leather and fabric upholstery, applicable to seat coverings | |
| GB/T 10357.3-2013 | Furniture mechanical test for chair strength and durability, applicable to seat structure |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to composite panel components; 2. GB/T 3325-2017: General technical requirements for metal furniture, applicable to steel frame components; 3. GB 20400-2006: Limit of harmful substances in leather and fabric upholstery, applicable to seat coverings; 4. GB/T 10357.3-2013: Furniture mechanical test for chair strength and durability, applicable to seat structure; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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