Mark the porch floor where you will install the posts to support the horizontal rails along the edge of the porch. These posts will have an inner steel column/core and a mounting flange at the bottom. The number of posts required will depend on the length of your porch rail. Follow manufacturer’s directions on placement and number.
Position the first metal post and use a bar level to ensure the post is vertical. If necessary, use washers or a shim of treated lumber to ensure it stands perpendicular to the porch floor.
Pre-drill bolt holes through the two corner holes in the post flange on the house side of the post. Ordinarily, you would pre-drill all four of the corner holes, but two of the holes in the flange sit on top of the porch rim joist. Consequently, we drill only the two holes with full clearance through the bottom of the porch.
Insert a washer and a bolt downward into each of the two holes in the flange.
Place the supplied backer plate and washers over the two bolts from the underside of the porch, and then add and tighten nuts with a socket wrench.
Drill pilot holes through the remaining two corner holes on the outer edge of the flange, boring through the porch and into the rim joist beneath.
Insert lag screws and then tighten them with the socket wrench. You will repeat the last seven steps for each of the metal posts you install.
