| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Per-seat center distance | 525 mm | |
|---|---|---|
| Seat height above finished floor | 460 mm | |
| Writing desk height above finished floor | 760 mm | |
| Writing desk usable size | 585 x 300 mm | |
| Seat panel usable size | 450 x 430 mm | |
| Under-seat storage rack usable size | 430 x 220 x 120 mm | |
| Backrest total height above floor | 900 mm | |
| Armrest height above finished floor | 650 mm | |
| Support stand foot plate size | 355 x 60 x 13 mm | |
| Backrest panel thickness | 18 mm | |
| Seat panel thickness | 18 mm | |
| Cross support beam size | 80 x 40 x 2 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
| Per-seat static load capacity | 260 kg | |
|---|---|---|
| Recommended user weight per seat | 120 kg | |
| Seat return mechanism cycle life | 100000 cycles | |
| Unit net weight per seat | 28 kg | |
| Fire-resistant laminate abrasion resistance | 2000 cycles | |
| Warranty period for structural components | 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
| End support stands | Die-cast aluminum, 5 mm wall thickness, powder-coated dark green/light gray finish, anti-oxidation treated | |
|---|---|---|
| Backrest panels | 18 mm multi-layer hardwood core, light wood grain fire-resistant laminate facing, aluminum top edge trim | |
| Seat panels | 18 mm multi-layer hardwood core, fire-resistant laminate surface, steel through-bolt connection to return mechanism | |
| Integrated writing desks | 25 mm E1 grade MDF core, light beige fire-resistant laminate facing, aluminum edge banding | |
| Cross support beams | 2 mm thick cold-rolled square steel tubing, powder-coated light gray finish, bolted to end stands | |
| Return mechanism covers | Injection-molded light gray PP, scratch-resistant matte finish, anti-pinch edge design | |
| Under-seat storage racks | 4 mm cold-drawn steel wire, powder-coated dark gray finish, welded frame construction | |
| Floor fixing hardware | Zinc-plated steel M10 inner hex expansion bolts, concealed plastic end caps | |
| Seat padding | 30 mm high-density polyurethane foam, 45 kg/m³ density, 40% rebound rate, upholstered in dark green fabric | |
| 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 | Gravity-driven hydraulic slow-return mechanism, 90-degree fold-up angle, silent anti-pinch operation | |
|---|---|---|
| Floor-fixed installation | Bolted to concrete or raised access floor via pre-drilled base plates, no wobble under normal use | |
| Under-seat storage | Flip-down wire rack holds books, bags and personal items, flushes against seat back when not in use | |
| Seat number identification | Circular numbered badge mounted on outer end of each row end stand, for seat assignment | |
| Integrated writing surface | Fixed continuous desk mounted to front row backrest, no folding, stable for writing and device use | |
| Seat separation dividers | Vertical dividers between adjacent seats prevent cross-interference between users | |
| Cable management hook | Small metal hook under writing desk holds charging cables and headphone cords | |
| 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 row layout with staggered heights for unobstructed sight lines to front podium | |
|---|---|---|
| Corporate training auditoriums | Integrated writing surface supports note-taking, laptop use and training material placement | |
| Government and institutional conference halls | Neutral dark green/light wood finish meets formal public space aesthetic requirements | |
| K-12 school multi-purpose halls | Durable construction and fold-up seats support flexible use for assemblies and exams | |
| Continuing education classroom spaces | Ergonomic seat and desk heights reduce fatigue during long class sessions | |
| Exam hall permanent installations | Fixed individual seats and writing surfaces prevent cheating, with under-seat storage for personal items | |
| 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 for educational institutions, safety and strength requirements for seating | |
|---|---|---|
| EN 1729-2:2015 | Furniture for educational institutions, functional dimension requirements for desks and chairs |
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to wood panel components | |
|---|---|---|
| GB/T 3976-2014 | Functional sizes and technical requirements for school desks and chairs, applicable to seat/desk height | |
| GB 18584-2001 | Limit of harmful substances in wood furniture, applicable to panel and adhesive components | |
| GB/T 24821-2009 | General technical requirements for public seating, applicable to structural load and durability |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to wood panel components; 2. GB/T 3976-2014: Functional sizes and technical requirements for school desks and chairs, applicable to seat/desk height; 3. GB 18584-2001: Limit of harmful substances in wood furniture, applicable to panel and adhesive components; 4. GB/T 24821-2009: General technical requirements for public seating, applicable to structural load and durability; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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