[TheForge] Steel attaching to masonry

[Mark Novak]

"Loose hinges on doors that do not press against each other.  Then  
let them expand. The motion doesn't count."

Sorry, but I'm still a little confused. When you say "loose hinges,"  
you're talking about where the door meets the hinge that is then  
mounted into the masonry, correct? You're saying hang the doors on,  
for example, an L-shaped piece of rod that fits into a small piece of  
tubing, thus creating a simple hinge?

If so, I may have not communicated clearly. My concern is less with  
the hinges themselves than with how the hinge is mounted into the  
masonry. Is there a material that will expand and contract with the  
steel, so that the hinges and doors don't tear away from cracking  
masonry? Is it merely a matter of leaving enough distance between  
where the hinges connect to masonry and the opening of the fireplace,  
or am I going to have to build a frame and a floor support that the  
doors can swing on, so that they aren't connected to the masonry at all?

Thanks for your help,
Mark