Description of the upper portion of the hull


The upper portion of the hull extended over an area 7 m long and what follows is a short description of each one of the hull elements which is intended, at this phase of the project, more as a structuring approach and an inventory of missing data than as a comprehensive description of the hull parts observed and recorded.

This part of the A1 shipwreck remains was fully recorded in plan, and several transversal sections were taken along the runs of the forward faces of the floor timbers.

The ceiling planking was disassembled, and a second map was made of the upper surface of the framing.  Some interesting features were observed, such as the presence of fore-and-aft treenails running through three timbers at several places.  However, only a full excavation and disassembling will show eventual patterns that will allow a discussion of the construction sequence and conception methods.

 

Fig. 1 - Hull remains.

 

Fig. 2 - Frame numbers.

 
 

Scantlings


After the last field season the remains of the upper hull consisted of:

Keel - one section, as far as it could be observed @ C10/C11 level.

Sided - 15.5 cm (top); 11cm (bottom).

Molded - 13.5 cm.

Preserved length - 6.05 m.

Scarves - Not observed.

Stem post - one section.

Sided - 14.5 cm (top); 9.5 cm (bottom).

Molded - 13.5 cm.

Preserved length - 1.49 m.

Scarves - Not observed.

Apron - Not fully measured.

Sided - 14.5 cm (top).

Floors - fairly well shaped.

Sided - Average 17.6 cm.

Molded - 16 to 17 cm.

Futtocks - roughly shaped.  First and second futtocks were preserved.

Sided - Average 18 cm.

Molded - 16 to 17 cm.

Room and space - irregular.

Around 42 cm between C1 and C8.

Around 29 cm between C9 and C18.

Ceiling planking (fixed) - Carefully shaped and laid.  Linked through flat horizontal scarves.

Thickness - 6 cm.

Width - 23 to 27 cm.

Max length preserved - 3.28 m (TN3A).

Scarves - Flat horizontal, 50 to 60 cm long.

Ceiling planking (floating) - Carefully shaped and laid.

Thickness - 5 cm.

Width - Variable. Min. 7 cm; Max. 29 cm.

Filler pieces - Carefully shaped and laid.

Thickness - 5 cm.

Width - Variable (=space between floors).

Length - Around 18 cm.

Hull planking - Carefully shaped and laid.

Thickness - 5 cm.

Width - Consistently 28 cm.

Max preserved length - Not recorded.

Fastenings - Both treenails and iron nails; remains of two bolts.

Keel/Stempost - Not recorded;

Floors/Keel - Treenails, Ø = 3 cm;

Floors/Futtocks - Treenails, Ø = 3 cm;

Keel/Keelson(?) - Iron bolts, Ø = 3.2 cm;

Planking/Frames - Iron nails, side = 8 mm; treenails, Ø = 3 cm.

Ceiling/Frames - Iron nails, side = 8 mm; treenails, Ø = 3 cm.

 


Citation Information:
Filipe Castro, ShipLab Report 5 - Arade 1 / 2002 Field Season, Vol. 2, 2002, World Wide Web, URL, http://nautarch.tamu.edu/shiplab/, Nautical Archaeology Program, Texas A&M University.