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18' x 20' Mortise and Tenon Pavilion

Frame Specifications:

*Timbers are 1/2" Under Full Dimension*

Size: 18' x 20'
Joinery: Mortise and Tenon
Posts: 8x8
Plate Beams: 8x14
Tie Beams: 8x10
Rafters: 4x8 and 8x8
Knee Braces: 6x6 and 6x8
Ridge Beam: 8x13
Roof: 7 Pitch
Wall Height: 8'-8"
Rafter Overhang: 3'

Plan Specifications:

Frame Elevations
Material List
Post Layout
All Wall Layouts
Rafter Layout
Fastening Details
Single Beam Drawings


This 18' x 20' Mortise and Tenon Pavilion features 3' overhangs on each end and 3' rafter overhangs, essentially bringing the total covered space to a spacious 24' x 26'. It would be a wonderful addition to any outdoor living space! The 24-page plan gives you everything you will need including a 3D rendering, elevations, material lists, post layout, wall layouts, rafter layout, fastening details and all single beam drawings. The frame is made up with 8x8 posts, 8x14 plate beams, 8x10 tie beams, 4x8 and 8x8 rafters, 6x6 and 6x8 knee braces and an 8x13 ridge beam. Let us help you get started today!

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