Setka A Cagarro

 keel bearers drilled, cut, and shaped

The keel bearers have been drilled cut and shaped, they are made from Afzelia/ Doussie

Janka hardness 8050N 

modulus of rupture 122.3MPa

elastic modulus 14.44GPa

crushing strength 74.1 MPa

average dried weight 805Kg/cubic m

shrinkage -  radial 2.3%  - tangential 3.9% -  volumetric 6.3% -  T/R ratio 1.7

Rot Resistance Rated as very durable Moderately resistant to termites and marine borers

used for docks, boatbuilding, etc

instead of Oak (I could not source the required good oak)

the best Oak for boats is White Oak, NOT red Oak

Janka hardness 5990N 

modulus of rupture 102.3MPa

elastic modulus 12.15GPa

crushing strength 50.8 MPa

average dried weight 755Kg/cubic m

shrinkage -  radial 5.6% -  tangential 10.5%  - volumetric 16.3% - T/R ratio 1.9

Rated as very durable  frequently used in boatbuilding and tight cooperage

Why white oak and not red oak?, 

Red Oak has a grain structure that looks like little drinking straws and when you put it in water the little straws suck up water, that is why white oak is used for cooperage, if you had barrels made of red oak all the contents would soak the wood and leak out -  Also Red oak is commonly used for cabinetry, furniture, interior trim and is rated as non-durable to perishable with poor insect resistance -  it is also quite hard to tell which is red oak and which is white oak, you can test by putting it in water and seeing if it sucks up liquid through the grain straws, or use sodium, nitrite solution- google it - 

The mast support is made from a really nice piece of Sapele Mahogany

Janka hardness 6060N 

modulus of rupture 110.9MPa

elastic modulus 12.35GPa

crushing strength 58.9 MPa

average dried weight 665Kg/cubic m

shrinkage -  radial 5.2% -  tangential 7.2%  - volumetric 12.9% - T/R ratio 1.4

Rot Resistance heartwood ranges from Moderately durable to very durable in regard to decay resistance Moderate insect/borer resistance

used for docks, boatbuilding, etc

the  Afzelia for the keel bearers were available in a size that would allow a  finished 5cm thick piece so they will have an extra piece laminated onto the to make up the the thickness as specified in the plans, though even at 5cm thick the specs say to me they are more than strong enough

the extra piece laminated to the keel bearer will have a cut out to countersink the nut see the test piece

if you are interested in wood and timber and the specific qualities of wood 

 - have a look at the website

 wood-database.com