Ooops, lemme start from the start...
Bahama shutters are panel shutters hinged at the top of the window, and are propped out from the bottom. They shade the windows from the sun, while allowing air in to the windows. When closed, they protect the windows against flying debris should a hurricane approach - a danger here on the Gulf Coast. They are very tropical looking, and would work on my house.
The header will serve as an attachment point for the shutter hinges, so they can be opened and closed. I believe that some Tapcon masonry screws will do the trick, but I wanted to make sure it would work.
Each shutter, I am estimating, will weigh about 45 pounds, with the whole assembly under 200. The guy at Home Depot told me that a Tapcon screw every foot driven through the header and two inches deep into the concrete ought to hold without any problem.