Abstract:

Four biological hazard zones are proposed for China based on decay hazard and termite hazard. The decay hazards are classified based on the Scheffer Climate Index for exterior aboveground wood elements. The three termite zones are classified based on the presence of Reticulitermes and Coptotermes species: no Reticulitermes or Coptotermes, Reticulitermes species only, both Reticulitermes and Coptotermes species. The four integrated biological zones included: low hazard zone Ⅰ with low decay hazard and no termites, moderate hazard zone Ⅱ with moderate decay hazard but no termites, moderate hazard zone Ⅲ with moderate decay hazard and Reticulitermes, and severe hazard zone Ⅳ with severe decay hazard and both Reticulitermes and Coptotermes. Such a classification aims to pave the way for developing appropriate requirements for wood protection against decay and termites in different regions, and the information can be used by designers and builders as a general guide for designing for certain climate loads and biological hazards to achieve long-term durability. The study also forms background information for further research on how to better protect wood against decay and termites in different areas.

Key words: termite zone classifications, decay hazard classes, biological hazard map, Scheffer's climate index