Hi all, 

I am thinking to add a cable railing to our deck. However, I have a question regarding the structural integrity of the finished project. 

In addition to passing the cables through 6×4 cedar corner posts (and 2×4 cedar posts as intermediates for maintaining cable spacing) I am are also planning to pass them  through the 3 6×6 cedar column posts, spaced approximately 12 ft apart, that are supporting our deck roof. 

Will the 10 vertical 1/4″ holes in each of these columns ar approximately 3″ apart affect the weight-bearing columns holding up the deck covering?

Thanks in advance for your comment.