What is VenloCAD 3D and is it free to use?

VenloCAD 3D is a 100% free, client-side WebGL parametric CAD engine developed by Inwoo Hwang for commercial CEA horticulture. It allows growers, engineers, and contractors to model industrial Venlo greenhouses in 3D, simulate structural deflection under NEN 3859 wind and snow loads, calculate steel and aluminum bills of materials (BOM), and export production-ready vector drawings directly in the browser with zero cloud costs.

Can I export production-ready 2D DXF vector drawings to AutoCAD or Inventor?

Yes. VenloCAD 3D generates standard AutoCAD-compatible DXF files featuring Front Elevation (View 1), Side Elevation with X-bracing (View 2), and Roof Framing Plan (View 3), complete with millimetric dimension lines, column grid axis tags (A, B, C / 1, 2, 3), and professional structural title blocks.

What is the .vcad file format and how does project saving work?

The .vcad format is a zero-loss JSON-based CAD interchange specification that preserves all structural dimensions, gutter heights, column cross-sections, local wind and snow loads, crop trellis weights, and solar angles. Files can be saved to your local PC, loaded back via instant drag-and-drop, or shared with teammates via URL hash parameters.

How can I request 1:1 expert care or permit drafting for my greenhouse project?

You can click the '1:1 Expert Care' button inside VenloCAD 3D to connect directly with lead agricultural structural engineer Inwoo Hwang. Services include contractor quote cross-auditing to eliminate markup bubbles, tailored 2D/3D permit blueprints, and government smart farm grant compliance engineering.

VenloCAD 3D: Free Web Parametric Greenhouse CAD & Structural Engineering Engine

🏛️ VenloCAD 3D Mathematical & Structural Architecture (SSOT)

1. Procedural Geometry Equations

The Venlo greenhouse places 2 sub-gables per span ($W_{span}$) to maximize direct and diffuse PAR light transmittance while discharging internal condensation through extruded aluminum gutters:

H_ridge = H_gutter + (W_span / 4) * tan(θ_roof)
L_rafter = (W_span / 4) / cos(θ_roof)

2. NEN 3859 / EN 13031-1 Combined Load & Deflection Matrix

Computes aerodynamic peak velocity pressure ($q_p$), snow load ground reduction factors ($\mu_1$), and column head horizontal lateral deflection ($\delta \le H/150$) in real time according to European greenhouse standards:

q_p = 0.5 * ρ_air * v_wind² * C_e
M_ULS = max(1.5 * M_wind, 1.2 * M_wind + 1.2 * M_vert)
δ_col = (k_share * w_line * H⁴) / (185 * E * I_x) <= H / 150

⚖️

Engineering Simulation & Legal Regulatory Disclaimer

1. Conceptual Modeling & Preliminary Feasibility Scope: The VenloCAD 3D engine generates procedural 3D structural geometry, member section profiles, NEN 3859 / EN 13031-1 structural safety factors, bills of materials (BOM), and preliminary capital expenditure (CAPEX) models strictly for preliminary feasibility analysis, educational research, and conceptual layout planning.

2. Mandatory Licensed Engineering & Local Permitting Requirements: The calculations and outputs produced by this application do NOT constitute certified for-construction drawings (IFC), stamped structural dossiers, or formal building permit documents. Commercial greenhouse construction, municipal zoning approvals, and commercial agricultural loan underwriting require mandatory site-specific geotechnical soil bearing capacity tests, regional basic wind velocity and ground snow hazard audits, and formal review and stamping by a licensed Professional Structural Engineer (PE) complying with regional building codes.

3. Commodity Market Volatility & Non-Binding Cost Estimates: Material quantities and estimated CAPEX metrics are indicative calculations benchmarked against standard commercial steel (S355JR, RHS sections), extruded aluminum (EN AW-6060-T6), and low-iron diffuse glass indices. Prices vary according to international metal commodity exchanges, freight logistics, local excavation conditions, and exchange rates; therefore, outputs do NOT constitute a binding commercial construction bid or guaranteed contractor quotation.

4. Limitation of Liability: Inwoovation Lab, its authors, and contributors disclaim all liability to the maximum extent permitted by law for any direct, indirect, incidental, or consequential damages, structural failures, crop damage, operational disruptions, financial losses, or contractual claims resulting from the use of this software or reliance on its computational models. For full operational terms, please review our Terms of Service.

Structural Type	Dutch Venlo Multi-Span Glasshouse
Span & Bay Configuration	8.0m × 3 Spans (Width 24.0m)
Total Longitudinal Length	32.0 m (Post spacing 4.0m)
Floor Area / Footprint	768.0 m² (~0.19 ac / 8,266 sqft)
Gutter & Ridge Height	Gutter 4.5m / Ridge 5.3m (Slope 22°)

Structural Type

Dutch Venlo Multi-Span Glasshouse

Span & Bay Configuration

8.0m × 3 Spans (Width 24.0m)

Total Longitudinal Length

32.0 m (Post spacing 4.0m)

Floor Area / Footprint

768.0 m² (~0.19 ac / 8,266 sqft)

Gutter & Ridge Height

Gutter 4.5m / Ridge 5.3m (Slope 22°)

Roof Glazing	4mm Low-Iron Diffuse Glass (Haze 70%)
PAR Transmittance	PAR 96.5% (Diffuse Light Canopy Penetration)
Glazing U-Value	5.6 W/m²K (Single-skin baseline)
Structural Steel Grade	High-Tensile Structural Steel S355JR (fy=355 MPa)
Gutters & Ridge Profiles	Extruded Aluminum EN AW-6060-T6

Roof Glazing

4mm Low-Iron Diffuse Glass (Haze 70%)

PAR Transmittance

PAR 96.5% (Diffuse Light Canopy Penetration)

Glazing U-Value

5.6 W/m²K (Single-skin baseline)

Structural Steel Grade

High-Tensile Structural Steel S355JR (fy=355 MPa)

Gutters & Ridge Profiles

Extruded Aluminum EN AW-6060-T6

Target Crop Spec	Vine Tomato (High-Wire Trellised)
Hanging Gutter Length	4 rows / bay (Total 384 m)
Plant Count & Density	1,536 plants (2.0 plants/m²)
Heating Pipe Rails	Ø51mm Dual Steel Rails (Total 768 m)
Projected Annual Yield	~49.9 tons / year

Target Crop Spec

Vine Tomato (High-Wire Trellised)

Hanging Gutter Length

4 rows / bay (Total 384 m)

Plant Count & Density

1,536 plants (2.0 plants/m²)

Heating Pipe Rails

Ø51mm Dual Steel Rails (Total 768 m)

Projected Annual Yield

~49.9 tons / year

Roof Ventilation System	Continuous Ridge Vent (Dual Sided)
Vent Area Ratio	21.3 % (NEN 3859 Compliant Summer Cooling)
Thermal Screen System	Aluminized 85% Reflective Thermal Screen (1-Layer)
Nighttime U-Value	3.1 W/m²K (Screen deployed)
Heating Fuel Savings	-44 % (vs. Single-skin glass)

Roof Ventilation System

Continuous Ridge Vent (Dual Sided)

Vent Area Ratio

21.3 % (NEN 3859 Compliant Summer Cooling)

Thermal Screen System

Aluminized 85% Reflective Thermal Screen (1-Layer)

Nighttime U-Value

3.1 W/m²K (Screen deployed)

Heating Fuel Savings

-44 % (vs. Single-skin glass)

🏛️ VenloCAD 3D: Parametric Greenhouse CAD & Structural Engine

VenloCAD 3D

📂 Load VenloCAD Project File

🏛️ VenloCAD 3D Mathematical & Structural Architecture (SSOT)

1. Procedural Geometry Equations

2. NEN 3859 / EN 13031-1 Combined Load & Deflection Matrix

VenloCAD 3D

📂 Load VenloCAD Project File

🏛️ VenloCAD 3D Mathematical & Structural Architecture (SSOT)

1. Procedural Geometry Equations

2. NEN 3859 / EN 13031-1 Combined Load & Deflection Matrix

📄 VenloCAD 3D Engineering Specification & Structural Compliance Certificate

1. Architectural & Geometric Dimensions

2. Enclosure Materials & Physics

3. Agronomic Infrastructure

4. Climate Steering & Thermal Energy Screens

5. Bill of Materials (BOM) & Estimated CAPEX Summary

📊 VenloCAD 3D Bill of Materials & Cost Estimation (BOM)

📑 Browser Local Project Slot Manager

🏛️ Inwoovation CEA Lead Engineering Onboarding & Care

💡 Recommended Engineering & Advisory Services