Founder Technical & Procurement Review
Tariff & Scope Verified: 2026-11-02
Reviewed for technical terminology, Turkish factory field reality and published EUR scope boundaries (not statutory engineering sign-off).
Applicable Products
- LGSF Steel Houses & Villas
- Flat-Pack Cabins
- Modular Site Camps
Critical Steel Check
EN 10346 S320GD / S350GD Structural Coil + Z275 / AZ150 Coating
Key Tools Used on Site
Digital Micrometer, Coating Gauge, Calibrated Tape & Coil Heat-Number Log
Recommended Gate
SS-TECH (€790 Pre-Order) + SS-PRE
€490 at >=85% Completion
Stage 1 & 2: Galvanized Coil Traceability & CNC Roll-Forming Geometry
The single most common hidden downgrade in Turkish light-steel villa and prefab kits is substituting non-structural commercial DX51D+Z100 sheet (100 g/m² zinc, no guaranteed yield plateau) where the static design assumed S350GD+Z275 (350 MPa yield, 275 g/m² zinc).
| Inspection Point | Target Specification | Common Factory Shortcut | Verification Method |
|---|---|---|---|
| Base-Metal Thickness (BMT) | 0.80 / 1.00 / 1.20 / 1.60 mm net steel |
Quoting coated thickness including zinc or -0.10 mm under-gauge coil |
Micrometer reading on uncoated cut edge + EN 10204 3.1 coil cert match |
| Galvanizing / Aluzinc Mass | Z275 (275 g/m²) or AZ150 coastal |
Z100–Z140 indoor-grade zinc that rusts at punched service holes |
Dual-probe coating thickness gauge (~19–20 µm per side for Z275) |
| CNC Dimple, Swage & Inkjet Code | Clean lip/web punch, zero burr, legible member ID matching erection CAD | Faded inkjet codes or misaligned dimples forcing site angle-grinding | Dry trial fit of 1 wall panel + 1 roof truss node on flat shop table |
| Sheathing & Wet-Area Boards | A1 autoclaved fibercement (8–12 mm) + OSB-3 + moisture/fire gypsum |
Low-density non-autoclaved board or OSB-2 swelling in sea transit |
Pallet brand/CE label check, board thickness caliper & edge moisture wrap |
Stage 3 & 4: Fastener Kits, Membranes, Joinery & Container Stuffing
- Hold-Downs, Chemical Anchors & EPDM Screws: Counting heavy galvanized shear/hold-down brackets, structural self-drilling screws (
RUSPERT / Dacrometcoated) and sealing washers against the signed packing list—plus a 3%–5% site spare margin. - Flat-Pack Cabin Chassis Welding & Roof Drainage: On demounted modular cabins, inspecting corner-post weld penetration, internal rainwater downpipes inside corner columns and
PIR / rockwoolroof-panel foam continuity.