Mother Son Double Steel Metal Door with Window: A Premium Choice by GD Door Factory As a leading manufacturer in the doors and windows industry, GD Door Factory specializes in delivering high-quality steel metal gate doors designed to meet the needs of modern homes and commercial spaces. Our mother-son double steel doors with windows combine […]
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Mother & Son Double Steel Security Doors – YK Doors 2025 Professional Solutions
Premium-Grade Dual-Layer Protection for High-Security Needs
YK Doors introduces its 2025 UL/EN/BS-certified Mother & Son Double Steel Door System, engineered for maximum security, fire resistance, and noise insulation. Designed for residential, commercial, and industrial applications, our doors meet NFPA 80, EN 1634-1, and BS 476-22 standards.
Product Lineup & Technical Specifications
1. Standard Mother & Son Door Systems
| Model | Outer Door (Mother) | Inner Door (Son) | Total Thickness | Fire Rating | Sound Insulation (dB) | Price (USD) |
|---|---|---|---|---|---|---|
| YK-MS500 | 2.0mm galvanized steel | 1.5mm reinforced steel | 120mm | 1.5h (UL 10C) | 42dB | $1,800–$2,200 |
| YK-MS600 | 3.0mm armored steel | 2.0mm bullet-resistant | 150mm | 2.0h (EN 1634-1) | 48dB | $2,800–$3,500 |
| YK-MS700 | 4.0mm anti-blast steel | 3.0mm ballistic steel | 180mm | 3.0h (BS 476-22) | 55dB | $4,500+ |
Core Features:
✔ Dual-locking mechanism (deadbolt + multi-point lock)
✔ Fireproof sealing (intumescent strips, 1000°C resistance)
✔ Customizable finishes (powder coating, wood grain, stainless steel)
2. Optional Security & Smart Upgrades
| Add-On | Function | Compatibility | Price (USD) |
|---|---|---|---|
| YK-BioLock | Fingerprint + PIN access | All MS series | $450–$700 |
| YK-Surveillance Kit | Peephole camera + motion sensor | YK-MS600/700 | $600–$900 |
| YK-Anti-Pry Bars | Reinforced hinges & strike plates | YK-MS500+ | +$200/door |
Certifications:
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UL 752 (Bullet Resistance)
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EN 1627 (Burglar Resistance)
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BS 6375 (Weatherproofing)
3. Customization & Bulk Order Options
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Non-standard sizes: Up to 2500mm (H) x 1500mm (W)
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Military/Govt. Specs: EM shielding, EMP hardening ($6,000+)
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Bulk discounts: 10+ units (15% off)
Why YK Doors?
✅ Tested & Certified: Independent lab reports available
✅ Fast Production: 15–20 days for custom orders
✅ 10-Year Structural Warranty