DfMA Light-Gauge Steel Framing Packages: EN 1993-1-3 Statics, CNC & Fees

Cold-formed Light-Gauge Steel (LGS) is only fast when engineered as true DfMA: every stud swage, dimple screw hole, lip notch, and pre-punched Ø38 mm MEP service conduit must come off the CNC roll-former ready to assemble like watchwork—with zero angle-grinder cutting on site.

Engineered to LOD 400 CNC Roll-Forming DfMA precision across a reference benchmark of 150 – 15,000 m² LGS Developments under EN 1993-1-3 Cold-Formed · AISI S100 · S350GD+Z275/AZ150 · Vertex BD / FrameCAD, this canonical specification unifies spatial design, multidisciplinary clash resolution, and 5D cost certainty prior to site mobilization.

Structural Grid & Modular Alignment: 400 mm / 600 mm stud spacing synchronized exactly with 1,200 / 1,250 mm exterior sheathing boards (A1 fiber-cement / OSB / gypsum) for zero waste.

Primary column grids, facade mullion subdivisions, and subterranean parking geometry are locked onto a unified datum—eliminating non-standard off-cuts and costly site framing adjustments.

Spatial Program & Net-to-Gross Efficiency: 1–4 story residential villas, resort bungalows, rooftop lightweight penthouse extensions, modular dormitories, and non-load-bearing high-rise infill walls.

Live parametric Revit area schedules track net usable/leasable floor area against vertical cores, MEP plantrooms, and envelope wall thickness at every design iteration.

Vertical Cores, Logistics & Life-Safety Egress: Pre-engineered LGS stair stringers, wide window/sliding-door hot-rolled hybrid lintel headers, and cantilevered balcony trusses.

Travel distances, pressurized stair cores, ADA/accessible routing, and heavy service/loading dock swept-path geometry are validated against NFPA, EN, and local building regulations.

Subsurface Utilities, Drainage & Wet Shafts: Pre-punched flanged service web holes aligned horizontally across studs so PEX water pipes and electrical conduits thread straight through.

Gravity stormwater and foul drainage stacks are modeled with true 1.5%–2.0% invert slopes, locking structural beam web penetrations and acoustic riser sleeves before rebar detailing.

Domestic Plumbing, NFPA/EN Sprinkler & Hydronics: 60-to-120-minute fire-resistance rated (REI 60 / REI 120) multi-layer Type-X / fireboard + mineral-wool wall and floor-joist assemblies.

Wet/dry sprinkler grids, fire hose cabinets, booster pump skids, and hydronic manifolds are spatially coordinated above ceiling plenums without compromising architectural clear heights.

HVAC Routing, Acoustics & Zero-Clash Verification: Lattice C-profile open-web floor joists allowing 200–250 mm HVAC ducts and drainage pipes to pass inside the structural floor zone.

Automated Navisworks and Solibri rule-sets enforce ±3 mm hard-clash tolerances and 25–50 mm insulation/maintenance clearance zones, closing 100% of BCF issues prior to tender issue.

Structural Framing & Seismic Engineering: EN 1993-1-3 / AISI S100 effective-width buckling checks, X-strap shear walls, Simpson-style tension hold-down anchors, and S350GD+Z275/AZ150 specs.

Inter-story seismic drift ratios, ductile steel moment/braced connections, foundation punching shear, and secondary facade subframes are signed off by our senior structural engineering partners.

Building Envelope & Hygrothermal Physics: Warm-frame external rigid mineral-wool continuous insulation eliminating thermal bridging across steel studs (U ≤ 0.16–0.20 W/m²K).

2D/3D thermal-bridge condensation risk is audited per EN ISO 6946, pairing Class A1 mineral-wool insulation, vapor-permeable membranes, and slotted seismic facade brackets at 1:5 shop detail scale.

Georeferenced Masterplan & ISO 19650 CDE: Every wall frame and roof truss tagged (W-101, T-204) with inkjet roll-former part printing matching 1:20 shop assembly sheets.

All discipline models share true survey coordinates (UTM / National Grid) and progress through ISO 19650 WIP → Shared → Published gates inside the Common Data Environment.

Native BIM & Construction Documentation Package: EN 1993-1-3 / AISI Structural Calculation Book, CNC Roll-Former Files (CSV/XML), Wall/Truss Shop Sheets, Foundation Anchor Plan, and Board/Screw BoQ.

Clients receive unlocked native CNC Roll-Former CSV/XML + Panel Assembly Drawings + EN 1993-1-3 Statics + Screw/Board BoQ source files, plotted PDF/DWG construction sets, and signed zero-clash audit certificates.

5D Quantity Take-Off (BoQ) & Indicative Studio Fee: The indicative engineering & BIM fee band for this reference scope is $6,500 – $19,500 (for Villa Compound / Multi-Unit LGS DfMA Package) (with indicative construction CAPEX benchmark at Cuts Site Erection Labor by 55% & Eliminates Wet Masonry Delays). Hybridizing S350GD cold-formed studs with targeted hot-rolled box columns only at wide 5 m glass sliders cuts steel weight by 18%.

DfMA Prefabrication & Export Execution Pathways: Compatible with FrameCAD, Scottsdale, Pinnacle, Howick, or direct production via our group SerBuild / SerProfil roll-forming lines.

Clients may tender the open BIM package to any local contractor or leverage our integrated group factories (SerBuild steel structures, SerMimar İskele EN 12810 scaffolding, SerMimar Şömine hearths, and SerSourcing 40HC consolidation).

International Codes, Sustainability & Compliance: Eurocode 3 Part 1-3 (EN 1993-1-3), North American AISI S100, EN 10346 S350GD+Z275/AZ150 Coating, and SCI P301/P402 Acoustic/Thermal Guides.

Structured directly for LEED / BREEAM / RE2020 energy modeling, UK Building Safety Act Golden Thread compliance, Eurocode National Annexes, and institutional lender due diligence.