18x20 Attic Truss Garage Plans | 18 ft End Door

Timber-Frame Garage 34.72m² (374 sq ft) - DP Gst 5,6x6,2

220" x 244" (18'4" x 20'4") / 5600 x 6200 mm
Structure Type: Timber-frame garage with attic-truss gable roof and end-wall door
Building Footprint: 34.72m² (374 sq ft)
Roof Pitch: 36° (attic truss)
Garage Door Width: 18 ft (5400 mm), in the gable end wall
Foundation Type: Concrete slab foundation
Ideal For: Residential garages, storage buildings, workshop spaces, or utility structures

Structure Details

This compact garage uses engineered trusses under a steep 36° gable roof, keeping the 34.72m² (374 sq ft) footprint open from wall to wall for one to two vehicles plus storage or workbench area. Access is through an 18 ft opening in the gable end wall, centered. The steep pitch leaves a tall roof void above the ceiling tie for light storage - engineered as a roof structure, not a floored loft. Timber-frame connections are engineered for long-term durability. Structural members are optimized for standard dimensional lumber availability.

What's Included

Complete structural engineering package created with licensed MiTek Pamir software:

 • Structural Drawings: Detailed elevations, floor plan, roof framing layout, and wall sections showing all timber members and connections
 • Load Calculations: Full engineering analysis for dead loads, live loads, snow loads, and wind loads
 • Production Drawings: Connector plate specifications and placement (where applicable to the design)
 • Cutting Bills: Exact dimensions and angles for every structural member - ready for cutting
 • Material Pick List: Complete timber quantities, fastener specifications, and hardware requirements
 • Foundation Layout: Perimeter and support structure details with anchor points
 • 3D Visualization: Interactive 3D model accessible via QR code for spatial understanding
 • Dual Measurements: Separate folders with metric (mm) and imperial (inches) versions

This plan provides everything needed for construction. All structural connections are engineered with proper load distribution using MiTek's professional timber engineering system.

Choose Your Plan

Standard Plan includes complete PDF documentation - perfect for builders and contractors.

Pro Plan adds DWG files (for AutoCAD and CAD software), IFC files (for BIM applications like Revit), and access to MiTek Pamir viewer software for enhanced technical viewing. Choose Pro if you need to import plans into CAD software for modifications or work with BIM workflows.