
Safely and securely store poultry litter and other corrosive products All double trusses built by Span-tech offer hot-dipped galvanized inside and out and able to withstand the brutal forces of poultry litter storage. We meet or exceed ASTM requirements for hot-dip galvanization, giving the maximum protection possible for your building. The round tubular truss design on our buildings causes material to fall down, rather than collect as it would on a square beam, keeping the environment safe and clean.