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LS-OFF-311-BLK

Code：GPG53DV1
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3-Piece Black Leather Reception Sofa Set (3+1+1 Seating Configuration) Key Specifications 2026-08-06 18:01

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LS-OFF-311-BLK

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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

3-seater sofa overall dimensions2100 x 880 x 900 mm
Single armchair overall dimensions980 x 880 x 900 mm
Seat height from floor420 mm
Seat depth580 mm
Seat cushion thickness120 mm
Backrest height above seat480 mm
Armrest height from floor600 mm
Wooden leg cross-section60 x 60 mm
Wood trim rail thickness30 mm
Clearance under sofa frame120 mm
Finished Seat Cushion Thickness90 mm
Backrest Padding Thickness70 mm
Lumbar Support Zone Height240 mm
Clear Width Between Armrests540 mm
PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Total set net weight range165 kg
Per-seat static load capacity150 kg
Total seating capacity5 persons
Foam density (seat cushion)45 kg/m³
Foam density (backrest)30 kg/m³
Seam tensile strength120 N
Leather abrasion resistance50000 rub cycles
Seat cushion foam density45 kg/m³
Backrest foam density30 kg/m³
Frame fatigue resistance100000 load cycles
PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Seat and back upholsteryBlack semi-aniline top-grain leather
Seat cushion coreHigh-density polyurethane foam
Backrest cushion coreMedium-density polyurethane foam
Decorative trim and legsStained solid beech wood
Internal support frame25mm square tubular steel frame
Seat support base8mm thick serpentine steel springs + 50mm elastic webbing
Upholstery threadBonded nylon stitching thread
Foot glidesHard plastic non-slip floor glides
Decorative trim and support legsStained solid beech wood, polished clear lacquer finish with 0.15mm coating thickness
Seat support suspension8mm gauge serpentine steel springs spaced 100mm apart, layered with 50mm wide elastic webbing
Upholstery stitchingBonded nylon #69 stitching thread, UV-stabilized to resist fading
Floor contact glides8mm thick hard non-slip polypropylene glides, fitted to base of each wood leg
PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seating configurationFixed modular 3+1+1 layout, units positioned independently for flexible reception arrangement
Back supportFixed contoured backrest with integrated horizontal lumbar support pad
Armrest designFully padded wrapped armrests with curved wood trim support
Floor protectionIntegrated plastic glides on all leg bases prevent scratching of tile, wood or laminate flooring without additional pads
Cushion designFixed attached seat and back cushions, no removable cushions for reduced maintenance in high-traffic areas
Structural stabilityFour solid wood legs per seating unit with full perimeter wood trim frame to eliminate wobble on level floors
Cleaning access120mm floor clearance allows access for vacuum cleaners and mops under the entire frame
Seating layoutFixed independent 3+1+1 configuration, units placed separately for flexible reception area arrangement
Armrest constructionFully leather-wrapped padded armrests with curved solid wood support trim
Cushion constructionPermanently attached seat and back cushions, no removable cushion covers for reduced high-traffic area maintenance
Edge protectionRounded padded arm and seat edges eliminate sharp contact points for user safety
Recline Angle / Lock Reference125° with 3suggested lock positions
PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Number of shipping packages3 cartons
3-seater sofa carton dimensions2150 x 930 x 650 mm
Single armchair carton dimensions1030 x 930 x 650 mm
Total shipment gross weight190 kg
Total shipment CBM2.54 m³
On-site assembly time30 minutes
40HQ container loading quantity42 sets
Total shipment volume2.54 m³
Reference Package Count1 set / 2 cartons
Reference Assembly Time40 minutes per set
PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Office reception areasFormal black leather styling suitable for corporate lobby, executive waiting area or meeting room visitor seating
Executive private officesCoordinated 3+1+1 set fits compact office spaces for hosting small meetings with 5visitors
Government and institutional waiting spacesConservative professional design and durable construction suitable for high-traffic public waiting areas
Formal lounge spacesCan be used in hotel lobbies, bank customer areas or legal office waiting rooms where a professional, polished appearance is required
Recommended pairingCoordinates with dark wood office desks, executive bookcases and neutral carpet or hard flooring for a unified formal interior scheme
Corporate office reception lobbiesFormal black leather and dark wood styling is suitable for main entry visitor waiting areas, projecting a professional institutional appearance
Commercial service waiting areasApplicable for bank customer lounges, legal office reception areas and hotel business center seating requiring a polished professional appearance
Small formal meeting spacesCan be configured as perimeter seating in 20sqm small meeting rooms for guest use alongside formal conference tables
STANDARD S1

EU EN Standards

European market access and chemical requirements

EN 13759:2012Domestic and contract seating safety requirements, applicable for structural stability and load performance for public reception areas
EN 1021-1:2014Upholstered furniture flammability resistance to cigarette ignition, minimum recommended safety standard for office seating
STANDARD S2

North America ANSI/BIFMA Standards

US and Canada office-furniture standards

No standards data is available for this market.
STANDARD S3

China GB Standards

Standards applicable to China-market projects

GB/T 3324-2017General technical requirements for wooden furniture, applies to solid wood legs and trim components for structural integrity and finish quality
GB 20400-2006Leather and fur safety specifications, applies to upholstery leather for restricted harmful substance limits
GB/T 19001-2016Quality management system guidance for consistent production of commercial reception furniture components
GB/T 1952.1-2012Upholstered sofas technical requirements, applies to structural stability, load capacity, foam performance and seam strength for sofa units
Standard Tender Description
This product must meet the following technical requirements:
1. GB/T 3324-2017: General technical requirements for wooden furniture, applies to solid wood legs and trim components for structural integrity and finish quality;
2. GB 20400-2006: Leather and fur safety specifications, applies to upholstery leather for restricted harmful substance limits;
3. GB/T 19001-2016: Quality management system guidance for consistent production of commercial reception furniture components;
4. GB/T 1952.1-2012: Upholstered sofas technical requirements, applies to structural stability, load capacity, foam performance and seam strength for sofa units;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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Product Overview & Construction Details

This 3-piece black leather reception sofa set, model LS-OFF-311-BLK, is an unbranded commercial-grade seating solution configured in a 3+1+1 layout, with one three-seat sofa and two matching single armchairs that hold a total of five seated users. The set carries a cohesive formal visual identity, defined by smooth black semi-aniline top-grain leather upholstery accented with curved, stained solid beech wood trim finished in polished clear lacquer. All units share consistent seat and back heights, fully wrapped padded armrests, and rounded upholstered edges to eliminate sharp contact points, creating a unified, polished profile suitable for formal settings. Construction prioritizes durability for high-traffic use, starting with a hidden internal 25mm square tubular steel support frame paired with a seat suspension system of serpentine steel springs and layered elastic webbing to reduce long-term cushion sag. Seat cushions use high-resilience 45 kg/m³ polyurethane foam wrapped in soft dacron batting for a smooth upholstery fit, while backrests use softer 30 kg/m³ contoured foam with an integrated lumbar support pad to support upright seated posture. Bonded nylon UV-stabilized stitching reinforces all leather panels, and solid beech legs are fitted with hard non-slip polypropylene glides to protect hard flooring surfaces. A 120mm clearance beneath the frame allows straightforward access for vacuuming and mopping, and permanently attached cushions reduce shifting and lower routine maintenance requirements. The set is well suited for a range of commercial and formal residential spaces, including corporate reception lobbies, executive private offices, government and institutional waiting areas, bank customer lounges, legal office reception zones, hotel business centers, and small formal meeting rooms, where its conservative, professional aesthetic aligns with polished interior schemes. It pairs seamlessly with dark wood office case goods and neutral carpet or hard flooring to create a cohesive formal look. Procurement teams should note that independent unit placement offers flexible arrangement options to fit varying floor plans, with on-site setup limited to glide checks and final positioning as legs arrive pre-installed. Material grade of the specified top-grain leather requires supplier bill of materials confirmation prior to final order placement, and teams should plan for shipping in three individual protective cartons with appropriate weight and volume allowances for transport and receiving workflows.

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