| Submitted | Field | Original | Note / Status | |
|---|---|---|---|---|
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Automatic mm / inch conversion · Core engineering specifications
| Overall dimensions | 520 x 520 x 830 mm | |
|---|---|---|
| Seat diameter | 510 mm | |
| Seat height | 490 mm | |
| Seat cushion thickness | 80 mm | |
| Backrest height above seat | 340 mm | |
| Backrest width at top | 480 mm | |
| Metal base ring diameter | 500 mm | |
| Metal frame tube diameter | 25 mm | |
| Open gap between seat and back | 120 mm | |
| Floor to base ring clearance | 10 mm | |
| Backrest padding thickness | 60 mm | |
| Vertical support bar width | 20 mm | |
| Finished Seat Cushion Thickness | 90 mm | |
| Lumbar Support Zone Height | 240 mm | |
| Clear Width Between Armrests | 540 mm |
Net weight / load capacity / users / durability
| Net weight per chair | 9 kg | |
|---|---|---|
| Static weight capacity | 150 kg | |
| Recommended continuous seating duration | 3 hours | |
| Seat foam density | 35 kg/m³ | |
| Foam rebound rate | 45% | |
| Powder coat scratch resistance | 2000 cycles | |
| Fabric abrasion resistance (Martindale) | 25000 cycles | |
| Available color options | 6 | |
| Seat Foam Density / Rebound Reference | 45 kg/m³ / 65% | |
| Back Foam Density Reference | 38 kg/m³ |
Core acceptance fields · Panels / hardware / frame / upholstery
| Seat upholstery | Cream woven polyester fabric | |
|---|---|---|
| Backrest upholstery | Matching cream woven polyester fabric | |
| Seat fill | High-density polyurethane foam | |
| Backrest fill | Medium-density polyurethane foam | |
| Support frame | 1.2mm thick matte black powder-coated steel tubing | |
| Base ring | Continuous 1.5mm thick powder-coated steel ring | |
| Floor protection | Rubber anti-scratch pads fixed under base ring | |
| Seam construction | Stitched perimeter seams with 8mm stitch pitch | |
| Internal seat support | 12mm thick plywood panel under foam | |
| Finish coating | Lead-free matte black powder coating | |
| 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
| Swivel function | 360-degree smooth rotation via hidden metal turntable | |
|---|---|---|
| Seating support | Fixed non-reclining upright posture for dining use | |
| Floor protection | Rubber pads prevent scuffs and reduce sliding noise | |
| Assembly requirement | Knock-down assembly connecting back frame to base with included hardware | |
| Back support | Curved open-back design provides mid-back lumbar contact | |
| Seat access | Armless design allows side access for flexible seating at tables | |
| Cleaning access | Smooth fabric surface supports spot cleaning with mild upholstery cleaner | |
| Weight distribution | Circular base ring distributes load evenly across floor contact points | |
| 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
| Residential dining room | Pair with round or square dining tables for 6person casual dining setups | |
|---|---|---|
| Cafe and bistro seating | Suitable for light commercial food service areas with compact table layouts | |
| Home vanity or makeup area | Armless compact footprint fits small vanity desks for grooming use | |
| Home office guest seating | Place beside desks as lightweight, space-efficient visitor seating | |
| Open plan living room accent | Use as standalone accent seating in lounge corners or reading nooks | |
| Small apartment dining nooks | Compact footprint fits compact kitchen dining areas with limited space | |
| Hotel room lounge areas | Coordinate with low tables for boutique hotel guest room seating | |
| Recommended Matching Desk Size | 2.4 m executive desk |
EU Market Access Requirements* EN Standards
| EN 12520:2015 | Furniture strength, durability and safety for domestic seating | |
|---|---|---|
| EN 1022:2018 | Test method for seating stability | |
| EN 16139:2013 | Strength requirements for non-domestic light contract seating |
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to internal seat panel | |
|---|---|---|
| GB/T 24821-2009 | Test methods for furniture surface coating abrasion resistance | |
| GB 18584-2001 | Limit of harmful substances in wooden furniture for indoor use | |
| GB/T 10357.3-2013 | Furniture mechanical performance test for chair strength and durability |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to internal seat panel; 2. GB/T 24821-2009: Test methods for furniture surface coating abrasion resistance; 3. GB 18584-2001: Limit of harmful substances in wooden furniture for indoor use; 4. GB/T 10357.3-2013: Furniture mechanical performance test for chair strength and durability; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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