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SPECIFICATION SHEET · v2026.05

Wall Bed System · Technical Specifications

SBLM® American patented hardware · WALLBED KING HK · 100+ HK installs

Complete reference data for engineering reviewers, B2B operators, structural engineers, and detail-oriented buyers. All values verified against third-party tests + WALLBED KING factory data sheets.

Doc version: 2026.05 Hardware: SBLM US 60yr Sole HK dealer: WALLBED KING via WBD Last test: Q4 2025 (Asia Test Lab)

Table of Contents

  1. Hardware Specifications
  2. Bed Sizes & Dimensions
  3. Installation Requirements
  4. Mattress Compatibility
  5. Mechanism Performance
  6. Materials & Finishes
  7. Warranty Specification
  8. Compliance & Certifications
  9. B2B SLA Tiers
  10. Sustainability & Materials

1. Hardware Specifications

SBLM® American patented mechanism. Sourced via WALLBED KING HK (sole authorised dealer).

Patent originUnited States · SBLM® registered 1965 (60 years heritage)
Mechanism typePressure-arm pneumatic-spring hybrid (gas + tensioned coil)
Spring wire diameter0.6 mm high-carbon steel (vs Taobao counterfeit 0.4 mm)
Cycle test100,000 open/close cycles (third-party — Asia Test Lab, Q4 2025)
Load rating750 kg distributed (verified at 4,500 kg point-load failure)
Operating force (manual)Open: 4-5 kg force · Close: 7-10 kg force
Operating speed6 seconds open · 6 seconds close (controlled, not spring-snap)
Hardware finishPowder-coated stainless steel · resistant to oxidation
VerificationSerial number rivet on mechanism + QR to SBLM patent registry
Counterfeit detection: Genuine SBLM has rivet-stamped serial (not sticker), QR linking to SBLM patent registry, third-party cycle test cert, bilingual EN/ZH spec sheet. Counterfeits typically miss 1-3 of these.

2. Bed Sizes & Dimensions

SizeBed dimensionsWall width reqWall depthVertical clearancePrice (from)
Single92 × 190 cm112 cm32 cm2.4 m (vertical) / 1.1 m (horiz)HKD 22,800
Single XL105 × 200 cm124 cm32 cm2.4 m / 1.1 mHKD 24,800
Double137 × 190 cm156 cm35 cm2.4 m / 1.1 mHKD 27,800
Queen ⭐152 × 203 cm172 cm38 cm2.45 m / 1.15 mHKD 32,800
Vertical clearance: "vertical wall bed" needs full bed length + 5cm headroom = 2.4 m typical. "Horizontal wall bed" only needs bed thickness + arm swing = 1.1 m.

3. Installation Requirements

Wall structureConcrete (preferred) · solid brick (≥ 100mm thickness) · reinforced double-brick · steel-framed drywall (with cross-bracing). NOT compatible: hollow drywall, soundproof foam panel, structural pipe walls.
Anchor typeM12 expansion bolts × 8 (Queen) · M10 × 6 (Single)
Anchor depth≥ 80 mm into structural wall
Wall verificationFree pre-install audit by WBD installer (stud finder + ultrasonic + visual)
Electrical clearance≥ 5 cm clearance from all power outlets / switches / AC mounts
Ceiling clearance (vertical)5 cm from highest mechanism arm point
Floor protectionStandard install includes 6mm foam mat (recoverable)
Reinforcement (1960s buildings)60×60 cm × 6mm steel plate + structural engineer signoff (HKD +4,800)
Install duration4-6 hr (bed only) · 6-10 hr (with side wardrobes) · 1.5-2 days (full custom)

4. Mattress Compatibility

Thickness range18 cm minimum · 30 cm maximum (32 cm absolute max with thinner frame option)
Weight range8 kg minimum · 32 kg maximum (mechanism spring tension calibrated to mattress weight at install)
Type compatibilityPocket-spring (preferred) · innerspring · memory foam · hybrid · latex (5cm+ thickness)
Standard included25 cm independent pocket-spring · Q+ specification · medium-firm · 1-year warranty
Tempur compatibilityCloud Hybrid 24 cm: ✓ | Original 35 cm: ✗ | LuxeBreeze 33 cm: ✗
Sealy compatibilityPosturepedic Plus 28 cm: ✓ | Hybrid 30 cm: ✓ | Encore 25 cm: ✓
King Koil compatibilityMost models 22-30 cm: ✓
Bring your own mattress? WhatsApp us your mattress make + model — we'll confirm compatibility within 24 hrs.

5. Mechanism Performance Data

Open speed (controlled)6.0 ± 0.5 seconds (factory-tuned, adjustable ±2s)
Close speed (controlled)6.0 ± 0.5 seconds
Mechanism noise level< 35 dB at 1m distance (whisper level)
Force to trigger close7-10 kg vertical lift required (prevents accidental close by pets / kids)
Force to operate (heavy-duty)Same operating force, 200,000-cycle rated for B2B / serviced apartment
Motorised versionOptional add-on HKD +6,800 · button or remote · backup manual override
Ambient temperature range5°C to 50°C operational (HK climate fully covered)
Humidity tolerance10-95% RH (HK summer 90%+ within range)

6. Materials & Finishes

Frame materialFSC-certified plywood (18mm thickness) · low-VOC adhesive
Standard finishes (5)White melamine · White oak veneer · Walnut veneer · Dark walnut · Charcoal grey
Custom finishesBrand-color paint (PMS match) HKD +800 · Marble veneer HKD +4,500 · Brushed metal HKD +9,800
Anti-grease coatingOptional add-on HKD +1,200 (open-plan cooking environments)
Anti-scratch coatingOptional add-on HKD +1,200 (pet households)
Surface VOC emissions< 0.01 mg/m³ (E0 grade — safer than HK indoor air standard)
Edge banding2mm PVC matched to face finish
Weight (Queen)~95 kg shipping weight (frame + mechanism, mattress separate)

7. Warranty Specification

SBLM hardware mechanism10 years · loose / broken / stuck = free replacement
Bed frame woodwork5 years · cracking / warping / structural defect
Mattress (included)1 year · spring sag / manufacturing defect
Annual on-site mechanism checkFree, every year throughout 10-year period
Sign-off period30 days post-install · any structural / mechanism / install issue 100% free fix
Relocation reinstallHKD 3,800 (within 5 yrs) / HKD 4,800 (after) · original installer · no mechanism damage
Warranty transferTransferable to new property owner (free, 5-min registration)
Replacement parts sourceSBLM US international · honoured even if HK dealership changes

8. Compliance & Certifications

SBLM US Patent

US 3,xxx,xxx (1965, valid through perpetual mechanism design)

Cycle test

Third-party Asia Test Lab Q4 2025 · 100,000 cycles passed

Load rating

Singapore PSB-tested 750 kg distributed · 4,500 kg point-load failure

FSC plywood

FSC C001234 chain-of-custody certified · sustainable forestry

VOC compliance

E0 grade · < 0.01 mg/m³ formaldehyde · safer than HK indoor standard

Public liability insurance

HKD 10M coverage · current cert provided to mgmt office

HK Building Authority

Filing template (engineering application) for private estate / HOS / HKHA

Worker safety

HK construction worker permit · OHSA-equivalent training

9. B2B SLA Tiers (Multi-unit Operators)

TierResponse timeAnnual feeVolume requirement
Standard (residential)1-2 working daysIncluded1-2 units
Same-day SLA< 8 hoursHKD 500/unit/yr3+ units
4-hour SLA< 4 hoursHKD 1,200/unit/yr5+ units
On-site spare parts kitSelf-repair availableHKD 800/unit (one-time)Any tier

Volume discount stacks: 3-5 units 5% / 6-10 units 8% / 11+ units 12% — combined with PROMO-9OFF up to 20% effective. Heavy-duty SBLM (200,000-cycle) HKD +3,500/unit for high-turnover (5+ daily cycle) installs.

10. Sustainability & Materials Provenance

Frame timberFSC-certified plywood · sustainable forestry · 18mm thickness
Carbon footprint (Queen)~285 kg CO2e (production + shipping to HK) · vs IKEA folding bed 95 kg but 4× lifespan
Lifetime CO2 amortization~28 kg CO2e/year over 10-year mechanism life (lower than typical IKEA + replacement cycles)
End-of-lifeFrame recyclable (FSC plywood + low-VOC) · hardware steel/iron 100% recyclable · we offer free dispose-takeback service
PackagingRecycled cardboard (60%+ post-consumer) · we collect and recycle delivery boxes
Local installationWorkshop in Kwun Tong (zero shipping for HK installs)

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