To build a deck railing, secure rail posts to the corners of the deck and the middle of each side, and then attach 2-inch by 4-inch boards between each post to act as the top and bottom rails. Use a 2-inch by 6-inch board as a rail cap.Continue Reading
Determine the height you want each handrail post to be. Add 9 inches to that measurement, and then subtract 1 1/2 inches. Cut each post to that length.
Use a circular saw to cut a notch that is 9-inches high and 2-inches deep at a bottom corner of the handrail post.
Slide the notch over the corner of a deck beam, and secure it with bolts.
Measure the distance between the post and the next corner over of the deck. Divide the measurement by two, or divide by three if the measurement is more than 8 feet.
Trace an outline for the post at that spot on the surface of the deck. The post must fit in a way that makes the outside face edge level with the face edge of the deck.
Use a jigsaw to cut out the outline on the deck, and then use a circular saw to cut out the notch on the post. Bolt the post to the deck.
Measure the distance between each post, and cut the top and bottom rails to this size.
Screw the bottom rail between the posts above deck level.
Screw in the top rail so the surface of the rail is level with the surface of the posts.
Repeat the procedure until every rail is up.
Measure each side of the deck from corner post to corner post. Cut each rail cap to this length, and cut a 45 degree angle at each corner.
Screw each rail cap into the tops of the rail.