In this video, This Old House general contractor Tom Silva explains how to build deck stairs. Steps: 1 Determine the width of each stair tread. 2 Use 4-foot level and tape measure to find the total rise of the staircase. 3 Divide total rise by number of steps to find height of each riser.
First, build a level landing pad for the stair stringers. You don’t need to pour a footing. Just dig out and compact a minimum 4-in. thick gravel base, then pour a concrete slab or lay paving stones. Lay out and cut the stringers. (See How to Build Deck Stairs for more information.) Make the bottom tread cut 1-1/2 in. shorter than the others.
When building stairs or steps for a deck: Make sure all of the step risers are the same height, and all the step treads the same width to avoid a tripping hazard. The rise of each step is determined by the height of the landing from the ground, with each step height from 7″ to 8″ high.
The first step in building stairs for a deck is finding the total rise or overall vertical height the stairs have to cover. Lay a straight board on top of the deck, extend it from the edge, then measure down to the landing location.
The result will be the number of steps the staircase will need (e.g., deck is 112" from the ground; 112/7.5 = 14.93. Round up to get 15 steps). To calculate the actual rise height, divide the height in inches by the number of stairs determined in the last step.
How to Build Deck Stairs You normally don't give much thought to building a set of deck stairs. But, when the time comes, you should check out Internet sites for advice or attend a DIY clinic at your local home improvement store.
Lay out the stairs by drawing on the outside of the square, sliding the square along until it meets the last mark to learn how to build steps. This will create a stair stringer calculator. Photo 3: Mark the top and bottom of the stringer to remove extra material
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Place the outside stringers against the house flush with the top of the anchor board, checking to be sure they’re level and square, and nail them to the ends of the anchor board. Cut 1?” off the end of each of the inside stringers to allow for the thickness of the anchor board.
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