| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 520 x 540 x 820 mm | |
|---|---|---|
| Seat width | 480 mm | |
| Seat depth | 440 mm | |
| Seat height | 460 mm | |
| Backrest height | 410 mm | |
| Backrest width | 460 mm | |
| Central lumbar cutout width | 220 mm | |
| Sled base footprint width | 500 mm | |
| Sled base footprint depth | 480 mm | |
| Stack height per chair | 120 mm | |
| Stack of 10 total height | 1420 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
| Chair unit weight | 4.8 kg | |
|---|---|---|
| Static seat load rating | 110 kg | |
| Stacking capacity | 10 units | |
| Backrest flex limit | 12 degrees | |
| Scratch resistance of shell | 3H pencil hardness | |
| Sled frame static load capacity | 150 kg | |
| 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
| Seat and back shell | One-piece injection-molded polypropylene copolymer, matte black finish | |
|---|---|---|
| Backrest lumbar pad | Integrated molded polypropylene block, black | |
| Sled base frame | Chrome-plated carbon steel round tube, polished finish | |
| Frame tube diameter | 16 mm outer diameter | |
| Floor glides | Hard plastic or nylon end caps on sled tube ends | |
| Shell wall thickness | 4 mm at structural ribs, 2.5 mm at flat panels | |
| Shell surface texture | Fine matte grain for scratch hiding | |
| Built-in lumbar support pad | Integral molded polypropylene block, matte black, mounted within the backrest cutout via two side support ribs | |
| Frame tube outer diameter | 16 mm | |
| Shell wall structure | 4 mm thickness at structural rib sections, 2.5 mm thickness at flat seat/back panels, injection-molded ribbed reinforcement underside | |
| Seat Internal Support Board Thickness | 14 mm bent plywood or equivalent support board | |
| Backrest Internal Frame Thickness | 14 mm bent plywood/composite reinforced frame |
Adjustment / rotation / tilt / mobility / storage features
| Vertical stacking | Chairs nest vertically by inserting the sled base of the upper chair into the seat recess of the lower one; supports up to 10 high for compact storage | |
|---|---|---|
| Lumbar support opening | Central cutout in the backrest creates a raised lower-back support pad while reducing material weight and improving air circulation behind the user | |
| Sled base stability | Continuous U-shaped steel frame on each side distributes load and prevents tipping; flat bottom slides smoothly on hard and carpeted floors without wheels | |
| Armless access | No armrests allow full side-to-side seating access and tight row spacing in conference or training rooms | |
| Lightweight portability | Low overall weight allows single-hand carrying by the backrest cutout for room rearrangement | |
| No height adjustment | Fixed seat height with no gas lift or mechanical adjustment mechanism; intended for uniform-height conference and meeting use | |
| Indoor use only | Plastic shell and chrome-plated steel frame are designed for controlled indoor office and education environments; prolonged outdoor UV or moisture exposure may degrade finish | |
| Vertical nesting stacking | Chairs nest vertically by inserting the sled base of the upper chair into the contoured seat recess of the lower one; supports up to 10 units stacked for compact storage | |
| Integrated lumbar support | Fixed molded lumbar panel positioned at lower back height inside the backrest cutout provides continuous lower back support; surrounding opening reduces shell weight and improves rear air circulation | |
| Sled base stable gliding | Continuous U-shaped steel side frame distributes user load across four floor contact points; flat bottom glides slide smoothly on hard floors and low-pile carpet without rolling wheels | |
| Armless unobstructed access | Eliminated armrest structure enables unobstructed side-to-side seating access and tight row spacing in conference or training rooms; allows 500 mm center-to-center seating arrangement in auditorium layouts | |
| Built-in carry handle | Backrest cutout forms a rigid handhold at mid-back height; allows single-hand lifting and transport for room rearrangement |
Verified carton / gross weight / assembly / loading data
| Units per carton | 4 chairs | |
|---|---|---|
| Carton dimensions | 860 x 560 x 480 mm | |
| Carton gross weight | 22 kg | |
| Carton volume (CBM) | 0.231 CBM | |
| Assembly time per unit | 0 minutes | |
| 20ft container loading quantity | 320 chairs | |
| 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 |
Recommended spaces / users / usage modes
| Corporate conference rooms | Suitable for boardrooms and meeting spaces with fixed-height tables (750 mm); armless design allows more seating per table and easy storage after meetings | |
|---|---|---|
| Training and education rooms | Ideal for training centers, classrooms and seminar venues where chairs must be frequently rearranged or stacked for floor space recovery | |
| Cafeteria and break areas | Appropriate for staff dining zones and casual break rooms due to wipe-clean polypropylene surface and durable frame | |
| Event and temporary seating | Useful for company events, town halls and pop-up workspaces because stacked units can be transported and deployed by a single operator | |
| Co-working shared spaces | Suitable for hot-desk and flexible membership areas where seating must be moved often and withstand high turnover | |
| Staff cafeteria and break areas | Appropriate for staff dining zones and casual break rooms due to wipe-clean polypropylene surface and impact-resistant steel frame | |
| Company events and temporary seating | Useful for company town halls, product launches and pop-up workspaces because stacked units can be transported and deployed by a single operator | |
| Examination and assessment venues | Fit for standardized test rooms and examination halls where fixed uniform seating height and neat row arrangement are required |
EU Market Access Requirements* EN Standards
| EN 16139:2013 | Applicable for strength, durability and stability of non-domestic seating; recommended test standard for contract-use stacking chairs in offices and public spaces | |
|---|---|---|
| EN 12520:2015 | Applicable for ergonomic safety and dimension requirements of domestic and office seating; used to cross-check seat height, back support and stability requirements |
US and Canada office-furniture standards
| ANSI/BIFMA X5.1-2021 | Applicable for general-purpose office chairs testing; recommended to verify backrest strength, seat impact, sled base stability and static load for commercial use | |
|---|---|---|
| BIFMA X5.4-2020 | Applicable for lounge and stacking seating cyclic durability; recommended for verifying 100,000 cycle seat and back fatigue life in high-usage training rooms |
Standards applicable to China-market projects
| GB/T 3326-2016 | Applicable for furniture seat, back and arm dimensions of chairs and tables; used to validate 460 mm seat height and 440 mm seat depth against Chinese ergonomic norms | |
|---|---|---|
| GB/T 28478-2012 | Applicable for strength and durability requirements of office furniture seating; recommended for verifying static load and frame stability of commercial stacking chairs |
This product must meet the following technical requirements: 1. GB/T 3326-2016: Applicable for furniture seat, back and arm dimensions of chairs and tables; used to validate 460 mm seat height and 440 mm seat depth against Chinese ergonomic norms; 2. GB/T 28478-2012: Applicable for strength and durability requirements of office furniture seating; recommended for verifying static load and frame stability of commercial stacking chairs; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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