I have approximately 2.6 cubic meters of
Bribie Island Cypress – Callistris columellaris in 42 slabs of 50mm thickness,
2600mm to 3400mm in length and of 350mm to 750mm in width. This timber has in
storage for 7 years with no signs of splitting. There are photos of the slabs
attached to this email.
In the 20 years I have been felling trees, I have never experience trees with the integrity to compare with these Bribie Island Cypress trees we were contracted to fell at Coombabah on the Gold Coast in 2003. In preparing for the felling of the Bribie Island Cypress trees we provided a generous scarf on the compression side of the tree (the side the tree is leaning towards) and then proceeded with a back cut on the tension side (the side the tree is leaning away from), cutting towards the front scarf cut. We were leaving a hinge of 5% to 10% of the trunk diameter, depending on the severity of the weight dominance (due to the tree’s lean and or imbalanced canopy weight). When felling a tree it is the remaining hinge wood that allows for safe controlled tree felling.
With the significant experience amongst the tree fellers on site, our normal methods used for the preparation of the felling of the Bribie Island Cypress was proving to be unsuccessful. When we provided what would normally be the appropriate width of hinge wood on a leaning tree, it would lean more severely by a further 20 to 30 degrees, but the hinge wood would not fail. Even with the assistance of a skid steer loader bushing from the tension side of the trees it was rear that the hinge wood would fail to allow for the felling of the trees. The wood that was left in the hinge wood had the integrity to bend significantly without failure. It was necessary to reduce the hinge wood to a third of what would normally be appropriate for all other tree species we had previous experience in felling. The flexibility and integrity of these Bribie Island Cypress was astonishing, and certainly second to no other tree species that we had previously felled.
It would stand to reason that the timber from these trees will be of the high quality, flexibility and integrity that would be required for the boat construction.The presence of natural substances in the wood (resin, guajol and callitrol) will
give the timber a resistance that would be valuable as a marine timber.