Hiya, I'm currently constructing an outdoor fireplace. I intend to use 3x3x3/16" angle in a couple of places where I'll need a lintel. I intend to paint it with high temp paint. Anyway, I'm wondering just what sort of clearance I need around the steel for thermal expansion? Obviously I need some mortar in there to hold the bricks together but just not sure of how much of a gap around the steel I need. Thanks very much, jlc
- posted
18 years ago