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Install the bottom rail between the porch posts and secure it with 3-inch-long ceramic-coated screws. How to Build Porch Stairs. How to Build a Porch Rail.
DIYNetwork.com shows how to build exterior stairs using pressure-treated wood and galvanized hardware to combat damage from water and weather. and bottom rails
Building code requirements for exterior decking railing, guards, and stairs are especially stringent because they fall into the category of critical health and safety matters. Code requirements for bathroom fans or drywall might be important but are not a life and death matter.
Clamp the Two-by-four Railing to the Post and Ceiling Determine railing elevation from the stair tread. Measure with a tape measure attached to a bar level. Clamp the rail to the post and ceiling beam at the correct elevation on the second step and one of the upper steps
The stair railings consist of 2 x 4 top and bottom rails, 5/4 x 6 rail caps and 2 x 2 balusters. Step 1 Clamp the 2 x 4 rails along the steps and mark the angles where the rails meet the posts.
Although there isn't one specific deck building code, here is a helpful summary of what you need to know for deck railings, stairs, stringers, treads, footings, framing and ledger boards.
To give the posts a bit of added strength, we ran a few exterior-grade screws through the posts and into the stair tread and the face of the porch, toenailing them in. Repeat the process with the bottom post. Then it was on to the next step in our quest to build a railing: installing the rails.
Plan to build the railing so that a person's hand can slide along the entire length of the railing from the top of the stairs to the bottom without interruption. You may interrupt the railing's continuity if there is a newel post at a turn in the staircase. A newel post is the large post at the beginning, at a turn or at the end of a stair railing.