| 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
| Unit net weight per 2-seat set | 38 kg | |
|---|---|---|
| Static load capacity per seating position | 150 kg | |
| Recommended maximum consecutive row seating length | 12 seats | |
| Service life for public high-traffic use | 10 years | |
| Seat and panel surface impact resistance | 10 J | |
| 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 support frame | 3mm thick die-cast aluminum alloy with matte dark gray powder coating | |
|---|---|---|
| Backrest panels | 12mm thick fire-retardant high-pressure laminate with woodgrain finish | |
| Seat panels | 12mm thick contoured fire-retardant high-pressure laminate matching back finish | |
| Under-seat book rack | 8mm diameter steel wire mesh with black epoxy coating | |
| Folding tablet arm | 15mm thick high-density particleboard core with laminate surface, mounted on steel hinge | |
| Fastener hardware | Zinc-plated steel anchor bolts, brackets and pivot pins | |
| Floor contact feet | 2mm thick ribbed rubber anti-slip pads | |
| 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 | |
| Five-star Base Material Thickness | Metal base wall 3.5 mm; diameter 700 mm |
Adjustment / rotation / tilt / mobility / storage features
| Writing tablet operation | Spring-assisted fold-up mechanism, stows flush against seat back when unused, locks in horizontal use position | |
|---|---|---|
| Seating configuration | Fixed continuous row mounting to tiered lecture hall floors, individual seat positions separated by central upright frame | |
| Back support design | Contoured split wood-laminate back panels aligned to natural spine curve, provides upright lumbar support for long lectures | |
| Under-seat storage | Fixed open steel wire rack under each seat position, holds bags, books and personal items during sessions | |
| Row egress design | No movable armrests between seats, flat fixed seat surface allows unobstructed passage along the row | |
| Noise reduction design | Rubber gaskets at tablet pivot points and floor contact points eliminate metal-on-metal noise during use | |
| Installation adaptability | Pre-drilled mounting holes on frame bases support installation on flat or tiered sloped lecture hall floors | |
| 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 installation provides durable high-capacity seating for daily scheduled class sessions | |
|---|---|---|
| Corporate training centers | Integrated writing tablet supports note-taking, workbook use and laptop placement during multi-hour training | |
| School auditoriums and multi-purpose halls | Sturdy construction supports frequent public events, assemblies and seminar use with low maintenance | |
| Conference and seminar rooms | Space-efficient row arrangement maximizes seating capacity while providing individual work surface | |
| Public government briefing rooms | Neutral wood and dark frame finish matches formal institutional interior design standards | |
| 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 12727:2000 | Performance requirements for tiered seating in public venues, applicable to structural load and stability verification | |
|---|---|---|
| EN 1022:2018 | Domestic and public seating stability test standard, applies to unit anti-overturning checks | |
| EN 13501-1:2018 | Construction product fire classification, applicable to upholstery and panel flammability rating |
US and Canada office-furniture standards
| ANSI/BIFMA X5.1-2017 | General purpose office chairs safety and performance standard, applicable to seat and back static load testing | |
|---|---|---|
| ANSI/BIFMA X5.5-2021 | Desk products performance standard, applies to writing tablet load and durability verification |
Standards applicable to China-market projects
| GB/T 3324-2017 | General technical requirements for wooden furniture, applicable to laminate seat and back panel quality verification | |
|---|---|---|
| GB/T 3325-2017 | Metal furniture general technical requirements, applicable to steel and aluminum frame structural integrity checks | |
| GB 20286-2006 | Fire retardant performance requirements for public seating materials in assembly occupancies, mandatory for public education venues |
This product must meet the following technical requirements: 1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to laminate seat and back panel quality verification; 2. GB/T 3325-2017: Metal furniture general technical requirements, applicable to steel and aluminum frame structural integrity checks; 3. GB 20286-2006: Fire retardant performance requirements for public seating materials in assembly occupancies, mandatory for public education venues; Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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