Boat Building
Strongback

The hull is built upside down on a wooden Strongback. It is used to align all the pre-fabricated transverse frames of the hull. The sketch below shows the building Strongback in plan, profile, and section views with the boats transverse frames in position.

Strongback material list:

• Main Bed Logs are 4" x 8" Timber
• Vertical Uprights are 4" x 4" Timber
• Cross Member are 4" x 4" Timber
• Angled Braces are 2" x 4" Timber

The same corner-to-corner measurement method used to fabricate the transverse frames will be applied here again to construct the Strongback.

Important building Stongback construction points are:

• The Strongack must be dimensionally true everywhere.
• Distance between frames must be held.
• The frames must be setup plumb.
• The headstock line of every frame must all be at the same height and plane.

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