ABSTRACT
Metal fasteners are widely used for joining timber. Mild steel and galvanised mild steel are the most common materials employed and over the last few years doubt has been raised regarding the integrity of some joints made with these metals, such as those used in roof trusses1-4. The concern centred around the possibility of enhanced corrosion of the fasteners when copper-chromium-arsenic (CCA) preservatives were used to treat the timber.
