{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "faq_version": "2026.1",
  "publisher": "JSC Stone Group Technical Engineering Dept",
  "questions_and_answers": [
    {
      "id": "faq-01",
      "question": "What is the maximum square meter payload of 20mm and 30mm granite per 20GP container from Xiamen Port?",
      "answer": "Because natural dimensional granite has a specific gravity density of 2.65 to 2.75 g/cm³ (averaging 55 kg/m² for 20mm thickness and 82.5 kg/m² for 30mm thickness), ocean shipping containers are constrained by highway weight enforcement (deadweight) rather than volume. Accounting for Xiamen Port's 26,500 kg gross limit minus 1,000 kg for 20 heavy ISPM 15 fumigated timber crates, the maximum net stone payload is 25,500 kg. This yields exactly 463 to 480 m² for 20mm thickness and 309 to 320 m² for 30mm thickness per 20GP container. Shipping 40GP containers is strongly discouraged for dense stone due to deadweight limits being reached at only 25% cubic volume capacity."
    },
    {
      "id": "faq-02",
      "question": "How does JSC Stone guarantee color consistency and eliminate chromatic aberration across 10,000+ m² facade projects?",
      "answer": "JSC Stone controls primary extraction benches at its captive Jiangxi quarry, extracting from identical geological strata. During processing, blocks are tracked with RFID lot numbers. We execute 100% full-scale color-matching dry-lay inspections inside our 35,000 m² Shijing facility, where every tile is numbered sequentially with alpha-numeric coding matching architectural facade elevation grids. High-resolution orthographic photography is submitted to the project architect for sign-off prior to crating, guaranteeing zero color variance upon jobsite arrival."
    },
    {
      "id": "faq-03",
      "question": "Does JSC Stone provide ASTM C97, ASTM C170, and CE testing documentation for US and European municipal tenders?",
      "answer": "Yes. Every export lot is accompanied by lot-specific test certificates conducted by accredited third-party laboratories (SGS or TÜV Rheinland) verifying ASTM C97 (Absorption < 0.20%, Density > 2.70 g/cm³), ASTM C170 (Compressive Strength > 180 MPa), ASTM C880 (Flexural Strength > 14 MPa), and European CE Declaration of Performance (DoP) under EN 1341 and EN 1469 standards. We also provide ANSI A137.1 Dynamic Coefficient of Friction (DCOF) reports confirming slip resistance exceeds wet 0.42 standards."
    },
    {
      "id": "faq-04",
      "question": "What are the engineering advantages of JSC Stone's granite honeycomb composite panels over solid 30mm stone cladding?",
      "answer": "JSC Stone's aerospace-bonded aluminum honeycomb panels weigh only 16.5 kg/m², delivering a 70% to 80% deadweight reduction compared to 30mm solid dimensional stone (82.5 kg/m²). This dramatically reduces structural steel framing costs, facilitates rapid crane installation, and enables spans up to 1500 x 3000 mm without risk of brittle fracture under seismic acceleration or extreme hurricane wind loads exceeding 8.0 kPa."
    },
    {
      "id": "faq-05",
      "question": "How do monolithic slotted granite trench drain grates perform compared to traditional cast iron or stainless steel grating?",
      "answer": "Cast iron and stainless steel grates suffer from oxidation, thermal expansion shear stress against adjacent stone, rattling under vehicular traffic, and visual disruption of urban landscapes. JSC's CNC monolithic slotted granite grates are precision-cut from Class D400 load-bearing solid G654 granite, providing an exact thermal expansion match, zero corrosion, ADA-compliant 6mm to 8mm heel-proof safety slots, and seamless aesthetic integration with surrounding plaza pavers."
    },
    {
      "id": "faq-06",
      "question": "What are your standard turnaround times for custom shop drawings and architectural stone samples?",
      "answer": "JSC Stone operates a dedicated 15-engineer BIM/CAD team that converts architectural sketches and IFC/Revit models into production shop drawings and anchor detail schedules within 24 to 48 hours. Physical material sample presentation boxes (100x100mm or 300x300mm with multiple surface finish variations) are dispatched worldwide via DHL Express within 48 hours of specification review."
    }
  ]
}