University of Hawaii tests local eucalyptus for construction-grade lumber

A University of Hawaii at Manoa research project led by civil engineering researcher Jun Wang will test whether eucalyptus grown on the islands can be used for structural construction. Supported by a $300,000 USDA Forest Service Wood Innovation Grant, the team will harvest trees from more than 34,000 acres of managed eucalyptus plantations, process them into lumber and test for strength and durability. The goal is to establish engineering design values that would allow builders and engineers to certify the local wood for use in homes, schools and infrastructure, reducing Hawaii's reliance on imported lumber.

Earlier research by the US Forest Service found that Hawaii-grown eucalyptus has useful mechanical properties but also documented challenges such as growth stress, splitting, and differences in density and strength compared to the same species grown elsewhere. The University of Hawaii says the project will work with state agencies, forest landowners and industry partners. If testing establishes reliable design values, the work could support structural applications and engineered wood products made in Hawaii.