In Floor Radiant Heat
Do you have any information on the use of in-floor radiant heat with 4x2 open-web floor trusses? Are there any adverse effects to the lumber as a result of moisture build up?
We do not have anything that addresses radiant heat with 4x2 open-web floor trusses. They typically don’t add a great deal of extra load on the structural members. If they do, the installation instructions should provide that information. In general, there would be no more adverse effects with 4x2 open-web floor truss than with sawn lumber joists or I-joists. Lumber is lumber, and as long as the product is installed properly (i.e., no leaking), there should not be a problem.