Before buying the marine plywood, the most expensive item in building these boats, we had to determine how many 4′ x 8′ sheets we required. A materials list comes with the plans but the plywood specified is 5′ wide which is not available here. By building a simple scale model using cardboard and bristol board we were able to calculate the widths for each plank and the number of strips we could get from each sheet of plywood.
For the two boats:
The bottom panels: two 12mm sheets ripped into four pieces, 2′ x 8′
The garboards: three 9mm sheets ripped into 16″ wide strips
The middle and sheerstrakes: three 6mm sheets ripped into 8″ wide strips
The frames are an integral part of dory construction. Amberjack plans call for two frames, one at station #2 and the other at #4. We have added a third frame at station #6 for additional strength and for fastening a seat riser. This will allow the thwarts to positioned anywhere along the riser. We decided to laminate the frames, including knees, after reading of other builders having solid wood frames split when fastening the shearstrake. No doubt naturally-grown knees would solve that problem but the laminated frames should just as strong.
2″ x 3/16″ Douglas Fir strips ready for gluing
Frame patterns incorporating the knees
Each frame is cut down the centre to produce two identical halves
Completed set of frames for one boat