| 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 | |
|---|---|---|
| Total weight per single seat unit | 28 kg | |
| Recommended maximum occupancy per seat | 1 adult | |
| Seat tip-up mechanism cycle life | 50000 cycles | |
| Floor anchor pull-out resistance | 8 kN | |
| 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
| Structural side frame | 2.5mm thick powder-coated die-cast aluminum alloy | |
|---|---|---|
| Seat panel | 12mm thick bent plywood with light beech wood grain laminate | |
| Backrest panel | 10mm thick bent plywood wrapped with 20mm high-density foam and black woven fabric | |
| Writing tablet | 18mm thick MDF board with light beech laminate finish and black ABS edge banding | |
| Underseat storage rack | 4mm diameter powder-coated steel wire grid | |
| Armrest pads | Injection-molded black PP with soft TPE outer cap | |
| Seat pivot hinge | Zinc-plated steel with self-lubricating nylon bushing | |
| Floor mounting feet | Cast iron with anti-slip rubber pad | |
| 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
| Folding seat action | Spring-assisted gravity-lift seat that folds upward to 80 degrees when unoccupied | |
|---|---|---|
| Fixed writing tablet | Permanently forward-mounted non-folding flat writing surface aligned to seat position | |
| Under-seat storage | Integrated wire grid rack to hold books, bags or personal items below writing surface | |
| Permanent floor mounting | Floor-anchored fixed installation with pre-drilled holes on foot plates for concrete or raised floors | |
| Ganged row connection | Modular interlocking side frames to align contiguous seats in straight rows | |
| Noise-dampening pivot | Nylon bushing hinge to eliminate metal-on-metal impact noise when seat folds | |
| Fixed armrest separation | Raised armrests between each seat to define personal seating space | |
| 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 | Durable fixed-row design with writing surface for long class sessions | |
|---|---|---|
| Corporate training rooms | Clean, professional finish suitable for continuous daily corporate use | |
| Secondary school auditoriums | Robust construction to withstand high student traffic and heavy use | |
| Conference center breakout rooms | Compact footprint allows high seating density with clear egress | |
| Government meeting chambers | Formal, understated appearance appropriate for official public spaces | |
| 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 12727:2016 Furniture - Seating - Test methods for strength and durability of auditorium seating | Applicable performance test standard for fixed public seating | |
|---|---|---|
| EN 1022:2018 Furniture - Seating - Determination of stability | Applicable stability verification for permanently anchored seating |
Standards applicable to China-market projects
| GB/T 3324-2017 General technical requirements for furniture: wooden furniture | Applicable for wood-based panel structural components of this seating | |
|---|---|---|
| GB/T 3976-2014 Functional sizes and technical requirements for school chairs and desks | Applicable for seat, table height and ergonomic dimension compliance for educational use | |
| GB 28007-2011 Safety requirements for children's furniture | Applicable for installation in K-12 educational venue deployments |
This product must meet the following technical requirements: 1. GB/T 3324-2017 General technical requirements for furniture: wooden furniture: Applicable for wood-based panel structural components of this seating; 2. GB/T 3976-2014 Functional sizes and technical requirements for school chairs and desks: Applicable for seat, table height and ergonomic dimension compliance for educational use; 3. GB 28007-2011 Safety requirements for children's furniture: Applicable for installation in K-12 educational venue deployments; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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