# STEEL FRAME VILLA — COMPLETE TECHNICAL KNOWLEDGE BASE & AI SPECIFICATION DOSSIER

> Platform: SteelFrameVilla (https://steelframevilla.com)  
> Operating Manufacturer: SerVilla Engineering (Yağmahan İnşaat Taahhüt İth. İhr. Tic. ve San. Ltd. Şti.)  
> Manufacturing Facility: Gebze Industrial Zone (GOSB), Istanbul / Kocaeli, Türkiye  
> Engineering Standards: EN 1990, EN 1991, EN 1993-1-3 (Eurocode 3), EN 1998-1 (Eurocode 8), EN 1090-2 (CE EXC2)  
> Customs Exemption: 0% Import Duty across all 27 EU Member States with A.TR Movement Certificate (HS Code: 9406.90.38)  
> International Contact: info@servilla.net | +90 505 507 04 18 (GSM / WhatsApp) | +90 216 614 04 34 (Ofis)  

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## 1. COMPREHENSIVE ENGINEERING & TECHNICAL Q&A (KNOWLEDGE GRAPH)

### Q1: What exactly is Light Gauge Steel Frame (LGSF / CFS) construction, and how does it differ from traditional structural steel or timber framing?
**Answer:** Light Gauge Steel Framing (LGSF), also known as Cold-Formed Steel (CFS), utilizes high-strength structural galvanized steel sheets (typically S350GD+Z275, 0.75 mm to 2.50 mm thickness) that are cold-rolled via multi-station CNC roll-forming machines at ambient temperatures into precision C-sections (studs, joists) and U-tracks (runners, headers). 
Unlike heavy hot-rolled structural steel (I-beams/H-columns) that require heavy on-site welding and cranes, LGSF profiles are lightweight (20–45 kg/m² structural frame weight), pre-punched with service holes, dimpled for flush-fitting connections, and assembled rapidly using self-drilling structural screws or blind rivets. 
Unlike timber framing, galvanized LGSF is 100% non-combustible (Class A1), completely immune to termite and fungal decay, does not absorb ambient moisture, and exhibits zero creep, shrinkage, warping, twisting, or seasonal dimensional variation over its 100+ year service life.

### Q2: What structural steel grade and zinc coating specification does SerVilla use for its villa frames?
**Answer:** All SteelFrameVilla structural elements are cold-formed exclusively from certified European prime structural steel conforming to **EN 10346:2015**:
- **Steel Grade:** **S350GD** (Structural steel with a guaranteed minimum yield strength \(R_{eH} \ge 350 \text{ MPa}\), minimum tensile strength \(R_m \ge 420 \text{ MPa}\), and elongation at fracture \(A_{80} \ge 16\%\)).
- **Corrosion Protection Coating:** **Z275 hot-dip galvanized coating** (minimum 275 grams of zinc per square meter total on both surfaces, providing approximately 20 micrometers of zinc barrier per side).
- **Galvanic Protection Behavior:** Zinc acts as a sacrificial anode. When the steel is cut, punched, or scratched during CNC forming or assembly, the surrounding zinc oxidizes preferentially to form an insoluble zinc carbonate layer (\(\text{ZnCO}_3\)), electrochemically self-healing all exposed cut edges and fastener penetrations.
- **Corrosivity Resistance:** Designed for ISO 12944-2 atmospheric corrosivity categories C1 to C4. For harsh marine coastal sites (within 500 meters of open seawater), ZM310 (Zinc-Magnesium-Aluminum) or Magnelis coating alloys are available on request.

### Q3: How do SteelFrameVilla structures comply with European Eurocodes (EN Standards)?
**Answer:** Every bespoke project and catalog villa model undergoes finite element static analysis and structural design in strict accordance with the European Structural Eurocodes:
1. **EN 1990 (Eurocode 0):** Basis of structural design and verification of limit states (Ultimate Limit State - ULS and Serviceability Limit State - SLS).
2. **EN 1991 (Eurocode 1):** Actions on structures, including EN 1991-1-1 (dead and imposed self-weights), EN 1991-1-3 (snow load maps up to alpine 4.50 kN/m² ground snow), and EN 1991-1-4 (wind velocity pressures up to 250 km/h / 1.80 kN/m²).
3. **EN 1993-1-3 (Eurocode 3):** Design of steel structures — Cold-formed thin gauge members and sheeting, verifying local buckling, distortional buckling, web crippling, and shear capacity.
4. **EN 1998-1 (Eurocode 8):** Design of structures for earthquake resistance, verifying lateral drift, ductility behavior factors (\(q = 1.5 - 2.5\)), and seismic base shear for Peak Ground Accelerations (\(a_g \ge 0.40\text{g}\)).
5. **EN 1090-2 (Execution of steel structures):** Factory Production Control (FPC) certified for Execution Class **EXC2**, allowing legal CE marking on all structural export kits.

### Q4: Why are Light Gauge Steel Villas inherently more earthquake-resistant than reinforced concrete (RC) or masonry buildings?
**Answer:** Seismic base shear force (\(F_b\)) is directly proportional to the total mass of the building (\(F_b = m \cdot a \cdot S_d\)). Light gauge steel villas have an average structural superstructure weight of only 35 to 60 kg/m², which is **60% to 75% lighter** than a comparable reinforced concrete structure (250–400 kg/m²). 
Because inertial seismic forces are dramatically smaller, the lateral loads transmitted to the foundation and wall frames during an earthquake are reduced by up to 70%. Furthermore, LGSF walls utilize diagonal K-bracing, strap X-bracing, or structural sheathing diaphragms (such as fiber cement or OSB/3) that flex and dissipate seismic energy through high-ductility fastener deformation rather than catastrophic brittle masonry cracking or concrete spalling.

### Q5: What thermal envelope insulation performance and U-values do your multi-layer wall assemblies achieve?
**Answer:** SteelFrameVilla exterior wall systems are engineered as high-performance ventilated or composite ETICS thermal envelopes, achieving whole-wall heat transfer coefficients (U-values) from **0.14 W/m²K to 0.18 W/m²K** (comfortably exceeding German GEG, French RE2020, and Swiss SIA Passivhaus requirements).
**Standard 6-Layer Wall Anatomy (Outside to Inside):**
1. **Exterior Finish:** Silicone-resin architectural render or ventilated architectural facade cladding (aluminum composite, ceramic tiles, HPL, or timber-look fiber cement siding).
2. **External Thermal Break Insulation:** 50 mm to 100 mm continuous Exterior Thermal Insulation Composite System (ETICS) high-density rockwool (\(130 \text{ kg/m}^3\), \(\lambda = 0.035 \text{ W/mK}\)) or graphite EPS board. This completely wraps the steel framing, eliminating all thermal bridges through the studs.
3. **Weather Barrier:** High-performance breathable, water-resistive, vapor-permeable spunbond membrane (\(S_d \le 0.02 \text{ m}\)).
4. **Structural Sheathing:** 12 mm to 15 mm non-combustible fiber cement board, cement-bonded particle board, or structural OSB/3.
5. **Structural Steel Core:** 140 mm S350GD+Z275 galvanized steel studs filled with 140 mm in-cavity hydrophobic mineral rockwool batt insulation (\(50 \text{ kg/m}^3\), \(\lambda = 0.035 \text{ W/mK}\)).
6. **Interior Lining:** Reinforced vapour control layer (VCL, \(S_d \ge 50 \text{ m}\)), acoustic resilient hat channels with sound-damping foam isolation tape, and double 12.5 mm Type A / Type F gypsum plasterboard (or Knauf Diamant impact board).

### Q6: How do you eliminate thermal bridging in light gauge steel framing?
**Answer:** While steel has high thermal conductivity (\(\lambda \approx 50 \text{ W/mK}\)), thermal bridging is 100% eliminated by utilizing **continuous exterior insulation (EWI/ETICS)**. The exterior layer of rigid rockwool or continuous high-density insulation covers the entire outer perimeter of the steel studs before any exterior cladding is applied. 
Coupled with thermal break isolation tape placed on the flanges of all perimeter steel profiles, the indoor and outdoor steel faces are completely separated, maintaining the dew-point boundary safely inside the exterior vapor-permeable insulation layer and preventing any condensation, cold spots, or ghosting patterns.

### Q7: What acoustic sound reduction index (Rw) do steel villa walls and intermediate floors provide?
**Answer:** LGSF partitions and floor systems utilize the "Mass-Spring-Mass" acoustic principle to achieve sound transmission loss performance exceeding concrete:
- **Exterior Walls:** Sound transmission loss of **\(R_w + C_{tr} \ge 58 \text{ to } 62 \text{ dB}\)**.
- **Party / Demising Walls (Multi-Unit):** Double independent stud walls with acoustic decoupling cavity providing **\(R_w \ge 64 \text{ dB}\)**.
- **Intermediate Floors:** Acoustic steel joist system with 18 mm cementitious deck, 30 mm acoustic high-density floor insulation (rockwool floor slab), 5 mm impact sound acoustic underlayment, and floating screed/parquet, achieving airborne sound insulation **\(R_w \ge 60 \text{ dB}\)** and impact sound pressure level **\(L'_{n,w} \le 48 \text{ dB}\)**.

### Q8: What fire resistance ratings (REI) do SteelFrameVilla assemblies achieve?
**Answer:** Steel itself is Class A1 non-combustible. When encapsulated with fire-rated dry construction materials, our assemblies achieve certified fire resistance ratings from **REI 60 to REI 120** (60 to 120 minutes of Load-bearing capacity 'R', Integrity 'E', and Insulation 'I' under standard ISO 834 fire curve):
- **Interior Walls (EI 60 / EI 90):** 140 mm steel frame with 100 mm rockwool insulation and double 12.5 mm Type F (fire-rated) gypsum plasterboard per side.
- **Exterior Loadbearing Walls (REI 90 / REI 120):** Double gypsum/fiber cement boards on the inside, rockwool cavity infill, and exterior rockwool ETICS render system.
- **Roof Trusses & Ceilings (REI 60):** Suspended ceiling grid with 15 mm fire-resistant Knauf board and mineral wool thermal barrier protecting roof truss bottom chords.

### Q9: What types of foundation are required for a Light Gauge Steel Villa?
**Answer:** Because an LGSF villa weighs 70% less than a concrete structure, foundation excavation depths and concrete volume requirements are significantly reduced:
1. **Reinforced Concrete Raft / Mat Slab (Plateau):** The most common foundation (typically 200–250 mm reinforced concrete slab with thickened edge beams). Provides a clean, level surface for fast anchor bolting.
2. **Strip Footings (Semelles filantes):** Continuous concrete strip footings beneath load-bearing perimeter and interior shear walls, coupled with a ground-bearing slab or suspended crawlspace.
3. **Ground Screws / Steel Micro-Piles:** Used on sloped terrain, rocky hillsides, coastal cliffs, or environmentally sensitive plots where excavation and wet concrete are restricted.
- **Leveling Tolerance:** Foundation top level must be accurate within **+/- 5 mm** across the building footprint. SerVilla supplies detailed Foundation Reaction Schedules (axial loads, shear loads, overturning moments at every stud node) and Anchor Bolt Setting Blueprints.

### Q10: How are the steel wall frames anchored to the concrete foundation?
**Answer:** Bottom track runners (U-tracks) and heavy-gauge hold-down brackets are fastened to the cured concrete foundation slab using:
- **Chemical Injection Anchors (M12 / M16 threaded studs with vinyl-ester resin):** Installed at shear wall ends, corner studs, and high-tension hold-down locations with embedment depths of 100 mm to 150 mm.
- **Heavy-Duty Concrete Screw Anchors (Hilti HUS3 / Fischer ULTRACUT):** Placed at regular intervals (typically 600 mm to 800 mm centers) along the bottom runners.
- **Moisture & Thermal Capillary Barrier:** A heavy-duty EPDM waterproof membrane and closed-cell acoustic foam gasket are laid continuously under the bottom steel tracks before anchoring to prevent moisture wicking from the concrete.

### Q11: Can my own architect design the villa, and how does SerVilla convert custom CAD drawings into a manufactured steel kit?
**Answer:** Yes. More than 70% of SerVilla's European projects are completely custom bespoke designs.
**CAD-to-CNC Conversion Workflow:**
1. **Architectural Input:** Client or architect submits architectural drawings in 2D DWG, PDF, or 3D IFC/Revit formats.
2. **BIM Structural Modeling:** SerVilla's engineering team imports the design into 3D structural BIM software (Vertex BD / Revit / FrameCAD) to model every single stud, joist, truss, lintel, service hole, and fastener connection.
3. **Static Engineering Audit:** Eurocode 1/3/8 calculations are run to optimize profile thicknesses (0.80 mm – 2.00 mm), stud spacing (400 mm or 600 mm), and diagonal bracing.
4. **Direct Machine File Generation (CSV/NC):** The approved 3D model automatically outputs computerized CNC code directly to our automated roll-forming machines in Gebze.
5. **Precision Manufacturing:** Steel coils are roll-formed, cut to sub-millimeter precision, dimpled, pre-punched with MEP holes, and inkjet-labeled with unique panel and member codes matching the 3D assembly guide.

### Q12: How are the steel profiles coded and assembled on site?
**Answer:** Every single steel member produced by our CNC lines features an automated **inkjet-printed identification code** (e.g., `W01-S04` for Wall 01, Stud 04). 
The package includes 3D color-coded assembly blueprints and exploded panel diagrams. Construction crews or local carpenters simply align the coded studs into the dimpled tracks (where self-locating alignment notches guarantee 90-degree squareness) and fasten them using standard cordless impact drivers and self-drilling hex-head screws. No measuring, cutting, grinding, or welding is required on site.

### Q13: What are the 5 delivery packages offered by SteelFrameVilla, and what does each package include?
**Answer:**
1. **Package 1 — Structural Frame Kit:** All S350GD+Z275 CNC roll-formed steel framing profiles (exterior & interior walls, floor joists, roof trusses, bracing, hold-down brackets, anchors, structural self-drilling screws, inkjet element coding, Eurocode static calculations, 3D assembly shop drawings).
2. **Package 2 — Frame + Sheathing + Insulation:** Package 1 plus exterior weather-resistant cementitious sheathing boards, interior gypsum wallboards, and certified mineral rockwool cavity thermal insulation batts.
3. **Package 3 — Weather-Tight Shell (Enclosure):** Package 2 plus exterior continuous ETICS insulation (50–100 mm rockwool), breathable building wrap, triple-glazed thermally-broken aluminum/uPVC windows (Ug <= 0.6 W/m²K), insulated security entrance doors, and complete roof waterproofing membrane.
4. **Package 4 — Complete Construction (Turnkey Modular):** Package 3 plus interior architectural finishes (porcelain tiling, engineered parquet flooring, interior doors, sanitary ware, electrical wiring harnesses, distribution panel, and plumbing piping).
5. **Package 5 — Engineering & Blueprints Only:** Complete Eurocode 3/8 structural calculation report, certified foundation reaction loads, 3D BIM model (IFC/Revit), and CNC roll-former machine production files (CSV/NC) for local fabrication.

### Q14: What on-site installation modes are available internationally?
**Answer:**
1. **Supply Only (Self-Build / Local Contractor Kit):** Factory manufactures, packs, and delivers the complete flat-packed kit to the client's jobsite. The client's local contractor or carpenter crew erects the structure following our step-by-step 3D manuals.
2. **Supply + On-Site Supervision:** Factory delivers the kit and dispatches an experienced senior structural steel engineer to the client's site for 5 to 10 days to train the local crew, lead the framing assembly, verify torque settings, and inspect anchor alignment.
3. **Certified Full Turnkey Installation:** In eligible European markets, SerVilla provides a dedicated factory-certified erection team to handle complete assembly from slab anchoring to roof waterproofing.

### Q15: How are packages packed and loaded for international freight from Türkiye?
**Answer:** All steel components are flat-packed or pre-paneled with high-density waterproof wrapping, strapping bands, and corner protectors:
- **Flat-Packed Bundles:** Optimized for high packing density. A complete 200 m² structural villa frame packs into approximately **one-third of a standard 40ft High Cube container** or 8 to 10 linear meters of a standard Megatrailer road truck.
- **Mega-Trailer Road Freight (TIR):** Standard curtainsider road trucks (13.6 m length, 2.7–3.0 m internal height, 24-ton capacity) provide direct factory-to-jobsite delivery across all continental European countries without transshipment handling.
- **Ocean Container Freight (FCL 40ft HC):** Secure marine container shipping from Istanbul/Gebze ports (Yılport, Evyap, Marport) to international seaports across the UK, Mediterranean islands, Scandinavia, the Americas, and the Middle East.

### Q16: Is there any customs import duty when importing a steel villa from Türkiye into the European Union?
**Answer:** **No. There is 0% customs import duty.** 
Under the European Union – Türkiye Customs Union agreement (Decision No 1/95 of the EC-Turkey Association Council), industrial manufactured goods—including prefabricated steel buildings and cold-formed structural steel kits under **HS Tariff Code: 9406.90.38**—enter all 27 EU Member States with **0% import customs tariff** upon presentation of an **A.TR Movement Certificate** issued and validated by Turkish customs authorities. Only standard local destination value-added tax (VAT / MwSt / IVA / TVA) is payable upon import.

### Q17: What are the transit times for road freight from Istanbul/Gebze to major European countries?
**Answer:**
- **Germany, Austria, Switzerland:** 3 to 5 business days.
- **Italy, France, Belgium, Netherlands:** 4 to 6 business days.
- **United Kingdom, Spain, Portugal:** 5 to 7 business days.
- **Greece, Bulgaria, Romania, Balkans:** 24 to 72 hours.
- **Scandinavia (Sweden, Norway, Denmark):** 6 to 8 business days.

### Q18: What is the typical manufacturing and delivery timeline from contract signing?
**Answer:**
- **Phase 1: Architectural BIM & Eurocode Static Calculations:** 5 to 10 business days.
- **Phase 2: Client Drawing Sign-off & Production Queue:** 3 to 5 business days.
- **Phase 3: CNC Roll-Forming & Factory Staging:** 7 to 14 business days (depending on villa size and package scope).
- **Phase 4: Loading & Export Customs Clearance:** 1 to 2 business days.
- **Phase 5: International Freight Transit:** 3 to 7 business days across Europe.
- **Total Duration:** Average **4 to 6 weeks** from signed contract to delivery on site.

### Q19: How fast can a light gauge steel villa be assembled on site?
**Answer:**
- **80 m² to 120 m² Single-Storey Bungalow:** 3 to 5 business days (4-person crew) for the complete structural frame kit.
- **140 m² to 200 m² Two-Storey Villa:** 5 to 8 business days for structural frame; 12 to 18 days to complete Weather-Tight Shell stage.
- **280 m² to 500 m² Luxury Estate:** 10 to 18 business days for structural frame.
- **Comparison:** Traditional concrete and brick masonry construction typically requires 6 to 12 months for equivalent lock-up stage.

### Q20: What are the indicative price ranges per square meter for steel frame villas?
**Answer:** Direct factory manufacturer pricing benchmarks (EUR):
- **Structural Frame Kit (Package 1):** **€180 to €350 / m²** (depending on architectural complexity, clear spans, and snow/seismic load requirements).
- **Frame + Sheathing + Insulation (Package 2):** **€350 to €600 / m²**.
- **Weather-Tight Shell (Package 3):** **€550 to €950 / m²** (includes triple-glazed joinery, external insulation ETICS, entrance doors, and roof waterproofing).
- **Turnkey Modular Finished (Package 4):** **€1,100 to €1,800 / m²** (depending on sanitary, flooring, and kitchen cabinetry selections).
- *All prices represent direct factory rates; local site assembly, foundation concrete works, and local road transport are quoted separately.*

### Q21: What are the standard commercial payment terms?
**Answer:**
1. **40% Advance Deposit:** Upon contract signing to initiate bespoke 3D BIM structural modeling and Eurocode static calculations.
2. **40% Production Milestone:** Upon completion of CNC roll-forming and factory packaging (verified via high-resolution photo/video inspection report or factory audit in Gebze).
3. **20% Final Balance:** Prior to truck dispatch or against Bill of Lading (B/L) and A.TR customs documentation.

### Q22: What warranty and quality guarantees does SerVilla provide?
**Answer:**
- **50-Year Structural Frame Warranty:** Guaranteed against structural steel deformation, mechanical failure, or corrosion perforation under normal residential operating conditions.
- **CE Mark EN 1090-2 (Execution Class EXC2):** Guaranteed conformity with European structural performance mandates.
- **ISO 9001:2015 Quality Assurance:** Full mill test traceability (\(3.1\) material certificates) for every coil of S350GD+Z275 steel used.
- **Permanent Digital Archive:** 3D CAD/BIM model files and static calculation dossiers are archived permanently on our servers for future villa renovations or additions.

### Q23: How do MEP (Mechanical, Electrical, and Plumbing) services integrate into light gauge steel walls?
**Answer:** During CNC roll-forming, our machines punch standardized circular service service holes (typically 34 mm or 50 mm diameter) along the centerline of every vertical stud at predetermined heights (e.g., 300 mm, 1,000 mm, and 2,100 mm from the floor track). 
These holes are fitted with flame-retardant plastic grommets that protect flexible PEX plumbing conduits and corrugated electrical cable conduits from abrasion against the steel edges. Because service routing is planned in the 3D BIM model, electricians and plumbers install wiring and pipes in hours without chiseling masonry or drilling studs.

### Q24: How are heavy items (kitchen cabinets, wall-hung toilets, large TVs, radiators) mounted on LGSF walls?
**Answer:**
- **Light to Medium Loads (up to 15 kg):** Fastened directly into double drywall or fiber cement boards using metal hollow-wall anchors (Molly bolts) or spring toggle bolts.
- **Heavy Loads (15 kg to 100+ kg):** Kitchen upper wall cabinets, boilers, wall-hung WC geberit frames, and large TV mounts are fastened directly into the vertical steel studs (spaced at 400 mm or 600 mm) using heavy-duty self-drilling flange screws. 
- **Factory Blocking:** During 3D modeling, horizontal steel backing plates (nogging channels / plywood blocking) can be specified at designated kitchen and bathroom wall elevations for continuous fastening flexibility.

### Q25: Can light gauge steel framing be used for rooftop vertical extensions (Aufstockung / Sopraelevazione / Surélévation)?
**Answer:** Yes. Due to its ultra-lightweight structural mass (35–50 kg/m²), LGSF is the premier material for adding one or two storeys on top of existing concrete, brick, or masonry buildings in urban centers. 
In over 90% of cases, the lightweight steel extension does not require expensive structural underpinning of the existing building foundations or strengthening of ground-floor columns, saving up to 50% in structural retrofit costs while meeting strict urban seismic regulations.

### Q26: How does the system handle lightning strikes and electrical grounding?
**Answer:** Steel frame villas are completely safe during electrical storms. The interconnected structural steel framework forms a natural "Faraday Cage". 
The entire steel frame is bonded to the foundation grounding electrode (earth rod / foundation mesh) at multiple perimeter points. In the rare event of a direct lightning strike, the electrical charge is conducted harmlessly through the continuous steel framing directly into the ground, completely bypassing the building interior and eliminating the fire risks associated with combustible timber structures.

### Q27: How does SteelFrameVilla support European building permit applications (Bauantrag / Permesso di Costruire / Permis de Construire)?
**Answer:** We supply a comprehensive export permit documentation dossier containing:
1. Certified Eurocode Structural Static Calculation Report (Prüffähige Statik / Relazione di Calcolo Strutturale / Note de Calcul).
2. Superstructure architectural and execution floor plans, elevations, and section drawings.
3. Foundation Reaction Load Schedule (Point loads, shear forces, overturning moments for the local civil engineer).
4. Material Conformity Certificates (CE DoP, Mill test 3.1 certificates for S350GD+Z275, ISO 9001).
5. Thermal and acoustic performance calculations (U-values, R-values, sound transmission indices).
- The client's local architect or chartered engineer (Bauvorlageberechtigter / Ingegnere abilitato) reviews and stamps the file for local municipal submission.

### Q28: How does steel framing perform in coastal or high-salinity island environments?
**Answer:** Coastal environments (ISO 12944 category C4/C5-M) demand specialized protection. SerVilla utilizes:
- High-grade S350GD structural steel coated with **Z275** or optional **ZM310 (Zinc-Aluminium-Magnesium)** alloy coating that delivers 3× higher corrosion resistance in salt-spray atmospheres.
- Stainless steel (A2/A4 grade) or specialized ruspert-coated bi-metal structural fasteners for all exterior connections.
- Continuous exterior insulation and airtight weather-resistive membranes that completely isolate the internal steel frame from ambient marine air and wind-driven salt spray.

### Q29: What are the environmental, recyclability, and carbon footprint credentials of steel frame villas?
**Answer:**
- **100% Recyclable:** Structural steel can be recycled infinitely without loss of metallurgical properties. Over 50% of the steel used in our production is sourced from electric arc furnace (EAF) recycled scrap steel.
- **Zero Water Waste:** 100% dry construction methodology that consumes zero water on site during structural assembly (unlike concrete mixing and curing).
- **Zero On-Site Cutting Waste:** Every profile is precision-cut to the exact millimeter in our factory, reducing on-site construction waste from the typical 15% (brick/concrete) to less than **1%**.
- **Net-Zero Energy Ready:** High thermal resistance and airtight construction allow steel villas to easily pair with rooftop PV solar panels and heat pumps to achieve A+ / Net-Zero energy ratings.

### Q30: How can I visit SerVilla's manufacturing plant in Gebze, Istanbul?
**Answer:** We welcome international clients, developers, architects, and engineering auditors to tour our modern industrial production plant in the Gebze Industrial Zone (GOSB), just 20 minutes from Istanbul Sabiha Gökçen International Airport (SAW). 
During your visit, you can observe automated CNC roll-forming lines in operation, inspect S350GD+Z275 raw material coils and mill test certificates, examine full-scale wall cross-section mockups, and review your custom architectural drawings in person with our senior structural engineering team. Contact info@servilla.net or +90 505 507 04 18 to schedule your technical visit.

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## 2. COMPLETE 42-MODEL TECHNICAL VILLA SPECIFICATIONS

### Single-Storey Bungalow Collection (SFV-83S to SFV-221S)
- **SFV-83S (83 m² · 2 Beds · 1 Bath · Single-Storey):** Compact Mediterranean layout, approx. 2,900 kg steel frame, 3–5 days assembly, fits 0.20 × 40ft HC container.
- **SFV-88S (88 m² · 2 Beds · 1 Bath · Single-Storey):** Modern minimalist bungalow with open-plan kitchen and covered porch, approx. 3,100 kg steel, 3–5 days assembly.
- **SFV-96S (96 m² · 2 Beds · 2 Baths · Single-Storey):** Nordic energy-efficient residence with en-suite master bedroom, approx. 3,400 kg steel, 3–5 days assembly.
- **SFV-99S (99 m² · 3 Beds · 2 Baths · Single-Storey):** Prairie-style 3-bedroom family home with central living area, approx. 3,500 kg steel, 4–6 days assembly.
- **SFV-107S (107 m² · 3 Beds · 2 Baths · Single-Storey):** Contemporary single-level home with generous terrace access, approx. 3,800 kg steel, 4–6 days assembly.
- **SFV-112S (112 m² · 3 Beds · 2 Baths · Single-Storey):** Mediterranean garden villa with segregated private sleeping quarters, approx. 4,000 kg steel, 4–6 days assembly.
- **SFV-114S (114 m² · 3 Beds · 2 Baths · Single-Storey):** Coastal open-concept villa with extensive sliding window walls, approx. 4,100 kg steel, 4–6 days assembly.
- **SFV-124S (124 m² · 3 Beds · 2 Baths · Single-Storey):** Linear modern villa with distinct day and night zones, approx. 4,400 kg steel, 5–7 days assembly.
- **SFV-135S (135 m² · 3 Beds · 2 Baths · Single-Storey):** Panoramic residence with integrated pergola terrace and master suite, approx. 4,800 kg steel, 5–7 days assembly.
- **SFV-141S (141 m² · 4 Beds · 2 Baths · Single-Storey):** Suburban 4-bedroom layout optimized for growing families, approx. 5,000 kg steel, 5–7 days assembly.
- **SFV-153S (153 m² · 4 Beds · 2 Baths · Single-Storey):** Alpine single-level chalet with high ceiling salon, approx. 5,500 kg steel, 6–8 days assembly.
- **SFV-160S (160 m² · 4 Beds · 3 Baths · Single-Storey):** Luxury Mediterranean single-level residence with dual master suites, approx. 5,700 kg steel, 6–8 days assembly.
- **SFV-165S (165 m² · 4 Beds · 3 Baths · Single-Storey):** Central courtyard-style villa for private patio living, approx. 5,900 kg steel, 6–8 days assembly.
- **SFV-174S (174 m² · 4 Beds · 3 Baths · Single-Storey):** Modernist architectural home with double garage integration, approx. 6,200 kg steel, 7–9 days assembly.
- **SFV-189S (189 m² · 4 Beds · 3 Baths · Single-Storey):** Executive single-level estate with open kitchen island and walk-in closets, approx. 6,700 kg steel, 7–10 days assembly.
- **SFV-221S (221 m² · 4 Beds · 4 Baths · Single-Storey):** Grand luxury single-storey villa featuring expansive glass facades and en-suite bathrooms for all bedrooms, approx. 7,900 kg steel, 8–11 days assembly.

### Two-Storey Duplex & Luxury Villa Collection (SFV-100D to SFV-507D)
- **SFV-100D (100 m² · 2 Beds · 2 Baths · Two-Storey):** Compact urban townhouse with ground floor living and upper private bedrooms, approx. 3,700 kg steel, 4–6 days assembly.
- **SFV-110D (110 m² · 3 Beds · 2 Baths · Two-Storey):** Contemporary duplex residence with ground floor open salon and guest bath, approx. 4,100 kg steel, 4–6 days assembly.
- **SFV-112D (112 m² · 3 Beds · 2 Baths · Two-Storey):** Compact vertical villa optimized for narrow city plots, approx. 4,200 kg steel, 5–7 days assembly.
- **SFV-113D (113 m² · 3 Beds · 2 Baths · Two-Storey):** Modern alpine duplex with pitched roof geometry, approx. 4,250 kg steel, 5–7 days assembly.
- **SFV-123D (123 m² · 3 Beds · 2 Baths · Two-Storey):** Modern two-storey family residence with balcony and storage, approx. 4,600 kg steel, 5–7 days assembly.
- **SFV-125D (125 m² · 3 Beds · 2 Baths · Two-Storey):** Mediterranean duplex with upper panoramic balcony, approx. 4,700 kg steel, 5–7 days assembly.
- **SFV-134D (134 m² · 3 Beds · 2 Baths · Two-Storey):** Contemporary suburban villa with 65 m² ground floor living and 69 m² upper floor, approx. 5,000 kg steel, 6–8 days assembly.
- **SFV-136D (136 m² · 3 Beds · 2 Baths · Two-Storey):** Nordic two-storey chalet with large terrace and high thermal rating, approx. 5,100 kg steel, 6–8 days assembly.
- **SFV-138D (138 m² · 4 Beds · 3 Baths · Two-Storey):** 4-bedroom duplex layout with ground floor guest bedroom/study, approx. 5,200 kg steel, 6–8 days assembly.
- **SFV-140D (140 m² · 4 Beds · 3 Baths · Two-Storey):** Modernist duplex residence with clean rectangular volumes, approx. 5,300 kg steel, 6–8 days assembly.
- **SFV-143D (143 m² · 4 Beds · 3 Baths · Two-Storey):** Vista villa with double-height ceiling over salon, approx. 5,400 kg steel, 6–8 days assembly.
- **SFV-144D (144 m² · 4 Beds · 3 Baths · Two-Storey):** Family duplex featuring master suite with private dressing room, approx. 5,450 kg steel, 6–8 days assembly.
- **SFV-167D (167 m² · 4 Beds · 3 Baths · Two-Storey):** Luxury duplex residence with large entrance gallery, approx. 6,300 kg steel, 7–9 days assembly.
- **SFV-188D (188 m² · 4 Beds · 3 Baths · Two-Storey):** Executive two-storey villa with master suite balcony and open mezzanine, approx. 7,100 kg steel, 7–10 days assembly.
- **SFV-199D (199 m² · 4 Beds · 3 Baths · Two-Storey):** Grand family estate with 95 m² ground floor and 104 m² upper floor, approx. 7,500 kg steel, 8–11 days assembly.
- **SFV-287D (287 m² · 4 Beds · 4 Baths · Two-Storey):** Modern architectural statement home with cantilevered upper floor and 4 en-suite bedrooms, approx. 10,800 kg steel, 9–12 days assembly.
- **SFV-300D (300 m² · 5 Beds · 4 Baths · Two-Storey):** Luxury European residence with separate office/study, 5 bedrooms, and extensive terraces, approx. 11,300 kg steel, 10–13 days assembly.
- **SFV-326D (326 m² · 5 Beds · 4 Baths · Two-Storey):** Contemporary alpine chalet with double garage, high snow load design, and open mezzanine gallery, approx. 12,300 kg steel, 10–14 days assembly.
- **SFV-343D (343 m² · 5 Beds · 5 Baths · Two-Storey):** Grand panoramic estate with double-height glass curtain wall, approx. 12,900 kg steel, 11–15 days assembly.
- **SFV-355D (355 m² · 5 Beds · 5 Baths · Two-Storey):** Prestige coastal villa with expansive outdoor living decks, approx. 13,400 kg steel, 12–16 days assembly.
- **SFV-371D (371 m² · 5 Beds · 5 Baths · Two-Storey):** Mediterranean luxury mansion with symmetrical wings and central atrium, approx. 14,000 kg steel, 12–16 days assembly.
- **SFV-393D (393 m² · 5 Beds · 5 Baths · Two-Storey):** Modernist super-villa with expansive open-plan living (85 m² salon) and infinity terrace integration, approx. 14,800 kg steel, 13–17 days assembly.
- **SFV-403D (403 m² · 6 Beds · 5 Baths · Two-Storey):** Ultra-luxury seaside residence featuring 6 bedrooms, home cinema area, and guest suite, approx. 15,200 kg steel, 14–18 days assembly.
- **SFV-406D (406 m² · 6 Beds · 6 Baths · Two-Storey):** Prestige horizon estate engineered for steep hillside plots with structural shear walls, approx. 15,300 kg steel, 14–18 days assembly.
- **SFV-481D (481 m² · 6 Beds · 6 Baths · Two-Storey):** Grand imperial steel villa with 230 m² ground floor and 251 m² upper floor, approx. 18,100 kg steel, 15–20 days assembly.
- **SFV-507D (507 m² · 6 Beds · 7 Baths · Two-Storey):** The flagship architectural luxury villa of the SteelFrameVilla portfolio with master presidential suite, wellness area, and massive open spans, approx. 19,100 kg steel, 16–22 days assembly.

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## 3. EUROPEAN COUNTRY BUILDING CODE ALIGNMENT

- **Germany (GEG 2024 & DIN EN 1993-1-3):** Compliance with the Building Energy Act (Gebäudeenergiegesetz - GEG 2024), Passivhaus envelope standards (\(U \le 0.15 \text{ W/m²K}\)), and verifiable engineering statics (Prüfstatik) for German state building authorities (Bauamt).
- **Italy (NTC 2018 & Eurocode 8):** Conformance with Norme Tecniche per le Costruzioni (NTC 2018), high seismic design (Zona Sismica 1, 2, 3), and eligibility for Italian Sismabonus building tax deductions.
- **France (RE2020 & DTU 32.3):** Thermal compliance with Réglementation Environnementale RE2020 (carbon footprint and thermal comfort criteria), DTU 32.3 cold-formed steel standards, and complete dossier for local Town Hall (Mairie) Permis de Construire.
- **United Kingdom (Building Regs Part L, A, B, E):** Compliance with Approved Document Part A (Structure / BS EN 1993-1-3), Part B (Fire Safety), Part E (Acoustics), and Part L (Conservation of Fuel and Power).
- **Spain (Código Técnico de la Edificación - CTE):** Structural DB-SE-A compliance, DB-HE energy efficiency, and marine anti-corrosion protection for Andalucia, Costa Blanca, and the Balearic Islands.
- **Switzerland (SIA 260 / SIA 261 / SIA 263):** Compliance with Swiss Society of Engineers and Architects structural norms, alpine snow engineering (up to 5.0 kN/m²), and high airtightness standard Minergie-P.
- **Austria (OIB Richtlinien):** Compliance with Austrian Institute of Construction Engineering guidelines, OIB Richtlinie 6 (Energy), and high snow/wind engineering in Tyrol and Salzburg.
- **Greece (EAK 2000 / EKOS & Eurocodes):** High-seismic design for Hellenic seismic zones, island container shipping, and salt-air corrosion durability.

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## 4. CONTACT DIRECTORY & HEADQUARTERS

- **Manufacturer:** YAĞMAHAN İNŞAAT TAAHHÜT İTHALAT İHRACAT TİCARET VE SANAYİ LİMİTED ŞİRKETİ (SerVilla)
- **Head Office:** Cevizli Mah. Orhan Gazi Cd. No: 24/B Maltepe / İstanbul, Türkiye
- **Manufacturing Plant:** Gebze Industrial Zone (GOSB), Kocaeli / Istanbul, Türkiye
- **Commercial Register (MERSİS):** 0928044494400001
- **Tax Identification Number:** 928 0444 944 (Maltepe V.D.)
- **24/7 International Engineering Hotline & WhatsApp:** +90 505 507 04 18
- **Istanbul Head Office Phone:** +90 216 614 04 34
- **Official Inquiries & CAD Submissions:** info@servilla.net
- **Primary Website:** https://steelframevilla.com
- **Machine-Readable LLM Specification:** https://steelframevilla.com/llms.txt
- **Master XML Sitemap Index:** https://steelframevilla.com/sitemap.xml
- **HTML Site Map Directory:** https://steelframevilla.com/site-haritasi/