I have posted earlier: "We got our deck extended. The supports are good and put in concrete- however - as you walk across the railing around - especially on one side shakes noticeably. What is the best method to minimize the movement. Deck size 20X20 - 11 ft raised above the ground!"
I apologize- It is the railing shakes as you walk; The floor does not. The railing moves visibly for +/- 1 inch in the middle of the span. How does one improve the support of railing?