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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

Data source: Structured from factory data; final measured values prevail.

Overall dimensions (W × D × H)	1740 × 850 × 1100 mm
Overall unit dimensions (3-seat section)	1740 x 850 x 1100 mm
Seat center-to-center distance	580 mm
Seat height above finished floor	465 mm
Writing surface height above finished floor	760 mm
Minimum required row-to-row spacing	900 mm
Writing surface thickness	18 mm
Seat cushion foam thickness	100 mm
Floor mount foot plate dimensions	390 x 65 x 5 mm
Steel support frame tube wall thickness	2.0 mm
Rear modesty panel thickness	17 mm
Backrest panel dimensions	760 x 500 x 17 mm
Finished Seat Cushion Thickness	90 mm
Backrest Padding Thickness	70 mm
Lumbar Support Zone Height	240 mm
Clear Width Between Armrests	540 mm

PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Data source: Product performance data; verify exact test conditions before procurement.

Single seat static vertical load capacity	150 kg
Seat pivot mechanism impact resistance	85 kg
Seat return mechanism noise level	35 dB
Recommended user weight capacity per seat	120 kg
Seat return mechanism cycle life	50000 cycles
Steel frame warranty period	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

PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Data source: Subject to the factory material list and inspection report.

Structural support frame	2.0mm thick cold-rolled steel tube with matte black electrostatic powder coating
Writing surface	18mm thick high-density wood-composite core with fire-resistant laminate top, 2mm PVC edge banding
Seat and back cushion fill	45kg/m³ density high-resilience cold-cured polyurethane foam
Seat and back upholstery	Abrasion-resistant flame-retardant polyester fabric, 50000 double-rub abrasion rating
Rear modesty panel	17mm thick high-density multilayer wood composite with matching laminate finish
Under-seat book rack	1.0mm thick cold-drawn steel wire welded mesh, black powder coated
Seat return mechanism	Torsion spring with hydraulic damper, steel and aluminum pivot brackets
Floor mounting hardware	M10 stainless steel expansion bolts for concrete floor anchoring
Pivot hinge tubes	19x14x2.0mm oval cold-rolled steel tubing for seat rotation points
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

PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Data source: Functional configuration; the supplier specification prevails.

Seat automatic return	Spring-damper mechanism lifts seat to vertical position when unoccupied, soft close without impact
Floor fixed installation	Bolt-down foot plates secure units permanently to tiered or flat concrete floors
Continuous integrated writing surface	Fixed front-mounted desktop spans full row width for each seat, with integrated pen groove
Under-seat open book storage	Wire mesh rack under each writing surface holds books, bags and personal items
Rear row privacy modesty panel	Full-height panel between rows blocks leg visibility and provides back support
Seat fold-up clearance	Seat folds 90 degrees vertical to increase aisle clearance when not in use
Modular row configuration	Sections connect to form continuous rows of any length for lecture hall layouts
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

PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Data source: Reference for export quotations and container planning.

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

PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Data source: Recommended applications based on product form and category.

University tiered lecture halls	Fixed forward-facing seating with integrated desks for large-class instruction, permanent installation
Corporate training auditoriums	Durable high-density seating for repeated daily training sessions, easy egress between rows
Conference center presentation rooms	Uniform tiered seating for clear sightlines to presentation stages, low maintenance
K-12 school multimedia classrooms	Sturdy fixed seating with built-in storage for student supplies, long institutional service life
Government and public assembly halls	Code-compliant fixed seating with high load capacity for public events, fire-rated materials
Recommended Matching Desk Size	2.4 m executive desk
Reference Daily Use Duration	8 hours/day; confirm by ergonomic testing

STANDARD S1

EU Market Entry Requirements * EN Standards

EU Market Access Requirements* EN Standards

EN 13761:2002	Furniture - Seating for educational institutions, performance and safety requirements
EN 1022:2018	Furniture - Seating - Determination of stability, applicable to fixed floor-mounted units
EN 12727:2000	Furniture - Seating - Test methods for strength and durability of educational seating

STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB/T 3324-2017	General technical requirements for wooden furniture, applicable to composite panel components
GB/T 3325-2017	General technical requirements for metal furniture, applicable to steel frame components
GB 20400-2006	Limit of harmful substances in leather and fabric upholstery, applicable to seat coverings
GB/T 10357.3-2013	Furniture mechanical test for chair strength and durability, applicable to seat structure

Standardized tender description text

This product must meet the following technical requirements:
1. GB/T 3324-2017: General technical requirements for wooden furniture, applicable to composite panel components;
2. GB/T 3325-2017: General technical requirements for metal furniture, applicable to steel frame components;
3. GB 20400-2006: Limit of harmful substances in leather and fabric upholstery, applicable to seat coverings;
4. GB/T 10357.3-2013: Furniture mechanical test for chair strength and durability, applicable to seat structure;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.

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Product Description

The YA-002 Fixed-Row Tiered Lecture Hall Desk-Chair Unit is an unbranded, institutional-grade public seating solution designed for permanent, high-traffic assembly spaces. Visually, it presents a cohesive, uniform row configuration with a matte black structural frame that supports aligned forward-facing seats, continuous integrated writing surfaces, and matching modesty panels, creating clean, unbroken sightlines across tiered or flat floor layouts. Its construction uses 2.0mm thick cold-rolled steel tube finished with electrostatic powder coating for the primary frame, paired with 18mm high-density wood-composite writing surfaces topped with fire-resistant laminate and sealed with 2mm PVC edge banding. Seats and backrests are upholstered in abrasion-resistant, flame-retardant polyester fabric over 45kg/m³ high-resilience cold-cured polyurethane foam, with 100mm thick seat cushions for extended comfort. Under-seat storage uses 1.0mm thick cold-drawn steel wire welded mesh with matching black powder coating, while 17mm thick multilayer wood-composite modesty panels sit between rows, and torsion spring hydraulic damper return mechanisms with steel and aluminum pivot brackets connect foldable seats to the frame. Units anchor to concrete floors via M10 stainless steel expansion bolts on heavy-duty foot plates. Functionally, the unit supports smooth, low-noise automatic seat return that lifts seats to a 90-degree vertical position when unoccupied, delivering soft, impact-free closure at 35dB noise levels to reduce disruption. The full-row continuous writing surface includes integrated pen grooves, sits 760mm above finished floor, and pairs with open under-seat racks to hold personal items, books, and bags. The 465mm seat height offers ergonomic positioning for most users, with a 120kg recommended weight capacity per seat, and folded seats create expanded aisle clearance for easy egress. Modular 3-seat sections connect to form custom-length continuous rows, requiring 900mm of row-to-row spacing for proper installation. This unit is ideal for university tiered lecture halls supporting large-class instruction, corporate training auditoriums for daily repeated use, conference center presentation rooms requiring unobstructed stage sightlines, K-12 multimedia classrooms with built-in student supply storage, and government public assembly halls needing high-load, fire-rated fixed seating. For procurement, note the steel frame carries a 5-year warranty, each 3-seat section ships in two cartons, requires 40 minutes of assembly per set, and 135 sets can fit in a 20GP container at 85% space utilization; installations require concrete flooring compatible with the provided expansion anchor hardware.

Fixed-Row Tiered Lecture Hall Desk-Chair Unit with Foldable Writing Tablet Specifications

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