JJI-Joists have an answer for everything built-in. No matter how demanding your job, JJI-Joists are in a class of their own. Solid timber flanges and OSB web make them light but very strong and easy to work with (creating service holes couldn’t be simpler). Our environmental credentials are also second to none. Add to that our technical brains - on hand to answer questions - and our design software that gives smart cost-effective answers, and your choice has to be intelligent JJI-Joists. Well, you’d be daft not to.