Wood & construction
Moisture governs every property of a timber structure; wood's fire behaviour is predictable, and growth biology caps the supply.
Wood is a structural material that keeps living after construction: it exchanges moisture with the air, creeps under load, and chars at a predictable rate. Hence the cluster’s first recurring motif — moisture as the governing variable: nearly every property, from shrinkage to fire resistance, is counted from the fibre saturation point. The second motif is interfaces: in a composite as in a glue line, load crosses a boundary between materials, and it is usually that boundary, not the bulk material, that limits.
The remaining pages look at the forest from two other sides: as a biological system with a fixed growth rate that caps harvest, and as a chemical reactor yielding resins, bark and pharmaceutical metabolites. Bamboo and algae envelopes mark where the very idea of “wood” runs out.
Start with timber construction: beam mechanics, charring and creep are treated there as physics, not as a code of rules.
Articles 9
| Engineered timber as a structural material Wood is anisotropic, hygroscopic and viscoelastic — engineered timber works by turning each of these three properties from a defect into a calculated quantity. |
| The forest as a production system Sustained yield works because tree growth follows a predictable curve with a single peak — and the harvest ceiling is set by site productivity, not by management ambition. |
| Biocomposites and the interface problem In a fibre composite, load moves from matrix to fibre across one shared surface — and wood's surface chemistry is built to attract exactly what plastics repel: water. |
| Adhesion science and the bio-glue problem Wood is easy to wet and hard to hold: a dry bond is trivial chemistry, but surviving decades of water while a hot press counts seconds is not — which is why one tiny crosslinker still owns the panel line. |
| Algae facades: photosynthesis as a building service A flat-panel photobioreactor really does shade a building and grow biomass — the honest questions are what happens to the energy ledger, and whether a carbon flux can ever pass for a carbon sink. |
| Growing wood without the tree Wood is not a polymer but a tissue built by a developing plant — cultured cells can make the material, yet nothing in a flask yet organises it the way a growing tree does. |
| Bamboo: a grass that builds like a tube A bamboo never grows thicker and never stops being a grass — it solves the structural problem with a finished fibre-wound tube built in weeks, and everything about its processing and pests follows from that. |
| The chemistry trees keep for themselves Every non-timber forest product is a molecule the tree evolved for its own defence — which is why the harvest ceiling is set by wounds and carbon budgets, not by how much stands in the forest. |
| Secondary metabolites as drugs The molecules worth extracting from a forest are its defence chemistry — potent by evolution, dilute and variable by the same evolution, and everything about the industry follows from that contradiction. |