Stairs For A Tall Deck Jlc Online At the bottom of the stair, stringers should rest on a footing (concrete pads or piers post footing) designed to resist a 40 psf live load and a 10 psf dead load. for more on this topic, see building and installing deck stairs. to learn more about building decks, visit the jlc field guide. Both of my methods mount the stringers directly to the deck rim board or to a header set just beneath the rim board. in either case, i cut the stringer head square down from the back of the tread cut (figure 6). figure 6. mark the head cut plumb down from the back of the top tread cut.
Building And Installing Deck Stairs Jlc Online And if the tread material is strong enough, a 3 to 4 foot wide stair will require only two stringers. that’s not possible with composite tread stock, of course, and, even with 2x12 treads, the stairs would be limited in width to 36 inches. but by using concrete treads and 4x12 solid stringers, we can build exterior stairs as wide as 48. Notched stair stringers have a limited unsupported run of 6 feet, according to the awc's prescriptive residential wood deck construction guide, or dca6 12. compare that with solid stringers, which can span more than twice that distance 13 feet 3 inches without intermediate supports. and while dca6 limits tread width to 36 inches, that can be. Like any other stairs, curved ones have to meet code. the main section in the 2012 irc that covers curved stairs is r311.7.5.2.1, winder treads, but other sections also apply. in general, the requirements are the same as for straight stairs, with a few additions that address the different shape of the treads. on curved stairs, the minimum depth. Essential resource: dca 6 2015. download the american wood council’s prescriptive residential wood deck construction guide (pdf). a deck is only truly safe if it remains so over its entire service life, and as barker explains, the dca 6 provides the best guidance available to ensuring that outdoor decks remain durable over time.
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