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3+1+1 Dark Brown Upholstered Formal Sofa Set with Solid Wood Trim Specifications

LS-311-WD-BR

Code:YS5H77V1
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2026-08-20 15:17Popularity: 27
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LS-311-WD-BR

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PRODUCT MODULE 01 / 06

Physical Dimensions

Automatic mm / inch conversion · Core engineering specifications

3-seat sofa overall dimensions2400 x 940 x 900 mm
Single armchair overall dimensions1200 x 860 x 900 mm
Seat height from floor460 mm
Seat depth (usable)560 mm
Solid wood foot height100 mm
Armrest height from seat220 mm
Backrest total height from seat440 mm
Per-seat usable width (3-seat unit)700 mm
Wood arm cap width160 mm
Dimensional installation tolerance3 mm
Seat Cushion Thickness180 mm
Back Cushion Thickness160 mm
Leg Height / Floor Clearance160 mm
PRODUCT MODULE 02 / 06

Weight, Load & Performance

Net weight / load capacity / users / durability

Total set net weight260 kg
3-seat sofa total static load capacity500 kg
Seat foam density45 kg/m³
Seat foam rebound rate60%
Seat foam compression set5%
Back cushion foam density35 kg/m³
Seam stitch density4 stitches per cm
Upholstery color fastness grade4
Frame wood moisture content12%
Product warranty period3 years
PRODUCT MODULE 03 / 06

Materials & Structure

Core acceptance fields · Panels / hardware / frame / upholstery

Internal frameKiln-dried eucalyptus/pine solid wood with plywood reinforcement
Upholstery materialDark brown top-grain leather or microfiber PU leather options
Seat cushion padding45kg/m³ high-resilience polyurethane foam
Back/arm padding40 kg/m³ medium-density polyurethane foam
Seat suspension system30mm diameter serpentine springs with 80mm maximum spacing + elastic webbing
Arm caps and panel trimStained polished solid hardwood with clear lacquer finish
Support feetSolid hardwood block feet with anti-slip rubber pads
Frame joineryMortise and tenon joints reinforced with metal screws
Frame treatmentInsect-resistant and rot-proof kiln-dried treatment
Stitching threadHigh-tensile bonded polyester thread
Available upholstery colorsDark brown, black, custom commercial color options
Timber Frame Section / MoisturePrimary section ≥30 × 50 mm; recommended moisture 12%
PRODUCT MODULE 04 / 06

Functions & Adjustment

Adjustment / rotation / tilt / mobility / storage features

Seating configuration3-seat sofa + two matching single armchairs, 5 total seats
Recline functionFixed stationary upright backrest, no recline or tilt mechanisms
Assembly requirementKnockdown leg/base assembly required, no special tools needed
Foot protectionAnti-slip rubber pads on all wood feet
Armrest functionWide solid wood arm caps support arm weight and hold small items
Seating ergonomicsUpright padded back support designed for extended formal seating
Structural durabilityReinforced joints rated for daily commercial use 8 hours per day
Customization optionCustom dimensions, upholstery grade and wood finish available per order
Cushion Service ConfigurationRecommended 2removable/replaceable cushion methods
PRODUCT MODULE 05 / 06

Packaging & Logistics

Verified carton / gross weight / assembly / loading data

Reference Package Count1 set / 2 cartons
Reference Assembly Time40 minutes per set
Reference Module Carton Dimensions2200× 1050× 850 mm
Reference Packaging Volume1.8 m³/item
Reference Packaged Gross Weight110 kg/item
PRODUCT MODULE 06 / 06

Applications & Usage

Recommended spaces / users / usage modes

Executive office reception areasFormal professional aesthetic suitable for waiting areas and visitor seating
Formal residential living roomsClassic durable design fits traditional home living spaces
Corporate lounge and meeting spacesStructured upright seating supports short meetings and visitor waiting
Hotel executive loungesWood trim and leather finish matches upscale hospitality interior design
Government and institutional reception roomsConservative formal silhouette meets official space furnishing requirements
Recommended matching furnitureLow rectangular coffee table and area rug as shown in product imagery
Placement requirementPosition units with 300mm clearance from walls for cleaning and access
STANDARD S1

EU Market Entry Requirements * EN Standards

EU Market Access Requirements* EN Standards

EN 12520:2015Applicable European standard for domestic and contract seating strength/stability
EN 1022:2018Applicable European standard for seating stability verification for reception furniture
EN 13759:2003Applicable European test standard for upholstered seating foam performance
STANDARD S2

North America Purchasing & Inspection Reference * ANSI/BIFMA Standards

US and Canada office-furniture standards

ANSI/BIFMA X5.4-2020Applicable North American standard for lounge/public seating performance and durability
STANDARD S3

Standards Applicable to China-Market Projects * GB Standards

Standards applicable to China-market projects

GB/T 3324-2024Applicable national standard for general technical requirements for wooden furniture
GB 18580-2025Applicable E0 formaldehyde emission limit standard for wood-based panel components
GB/T 16799-2018Applicable standard for furniture leather used in upholstered furniture products
GB 18401-2010Applicable Class B safety standard for any textile components in upholstery
Standardized tender description text
This product must meet the following technical requirements:
1. GB/T 3324-2024: Applicable national standard for general technical requirements for wooden furniture;
2. GB 18580-2025: Applicable E0 formaldehyde emission limit standard for wood-based panel components;
3. GB/T 16799-2018: Applicable standard for furniture leather used in upholstered furniture products;
4. GB 18401-2010: Applicable Class B safety standard for any textile components in upholstery;
Final delivery parameters, test reports, and acceptance criteria are subject to the purchase contract.
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Product Description

The LS-311-WD-BR dark brown upholstered formal sofa set delivers a structured, conversational 5-seat layout consisting of one three-seat sofa and two matching single armchairs, all featuring polished solid wood trim along arms, panels, and block feet for a refined, traditional aesthetic. The dark brown upholstery is available in two options: top-grain leather or microfiber PU leather, both finished in a deep, warm brown tone that pairs seamlessly with the stained clear-lacquered wood accents. Each piece is built on a kiln-dried solid hardwood frame of eucalyptus and pine, reinforced with plywood, secured with mortise and tenon joinery and metal fasteners, and treated for insect resistance and rot protection for long-term structural integrity. The seating system uses 30mm diameter serpentine springs with a maximum 80mm spacing paired with elastic webbing, topped with high-resilience polyurethane foam seat cushions, medium-density foam for back and arm padding, and precision-tailored seams. Wide, smooth solid wood arm caps support arm weight and accommodate small personal items, while anti-slip rubber pads on all feet protect flooring surfaces. The fixed stationary upright backrests are engineered for extended formal seating, with the frame rated to support 8 hours of daily commercial use. This sofa set suits a range of formal settings, including executive office reception areas, corporate lounge and meeting spaces, hotel executive lounges, government and institutional reception rooms, and traditional residential living rooms, pairing naturally with low rectangular coffee tables and coordinating area rugs. For procurement, note the set ships in two cartons, requires simple knockdown leg and base assembly with no special tools needed, with a reference assembly time of 40 minutes per set. The unbranded design offers consistent formal styling across all pieces, with uniform seat height, supportive upright back geometry, and durable finishes that hold up to regular visitor and resident use, making it a reliable choice for spaces requiring a polished, professional seating arrangement without moving mechanisms or overly casual design elements.

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