the most popular summer projects are decks and fences, and the most popular material for these types of projects is wood, by a long shot. when it comes to outdoor wood projects and materials, the three big contenders are pressure-treated or pt wood, cedar and composite. they each have their pros and cons, but what it usually comes down to is which you have more of time or money.
overview. this lumber is pressure treated in order to protect it from termites, fungal decay, and rot. ideal for a variety of applications, including decks, play sets, landscaping, stair support, walkways and other outdoor projects where lumber is exposed to the elements. this lumber can be painted or stained.
treated wood is used for decks, mailbox and light posts, swing sets and playscapes, picnic tables, landscape ties, underwater dock pilings, oceanside boardwalks, telephone utility poles and, believe it or not, residential building foundations in some parts of the country
wood for any outdoor project should be pressure-treated, while wood for indoor projects should not be pressure treated. the chemicals used to pressure treat wood arent safe for humans, this is why non-pressure treated wood is still required for use indoors, and why builders recommended that you only use pressure treated lumber for your outdoor projects like decks, pergolas, etc.
most rot-resistant pressure-treated lumber sold for homeowner use relies on two copper-based wood preservatives -- alkaline copper quaternary and copper azole -- in place of the arsenic-based compounds formerly used. unfortunately, the copper-based preservatives cause rapid corrosion
lumber, pressure-treated lumber, appearance board, pressure-treated appearance board, southern pine lumber, southern pine appearance board get the weathershield 1 in. x 4 in. x 8 ft. pressure-treated southern pine lumber, for above ground use is ideal for a variety of outdoor applications where lumber is exposed to the elements from the
field-cut ends, notches, and drilled holes of pressure-preservative-treated wood shall be retreated in the field irc r502.6 and ibc 2308.8.1 bearing. the ends of each joist, beam or girder shall have at least 1 ½' of bearing on wood or metal except where supported on a 1'x4' ribbon strip nailed to adjacent studs.
treated lumber service two purposes. first it is intended to be used in exterior conditions and resist rot and decay and second it is resistant to insects. thompson water seal might extend the life of untreated lumber in an exterior condition by a year or two only. it will not help resist insects.
solid and built-up beam sizes for decks. if you have to use a built-up i suggest placing a flashing cap or membrane that won't break down and not use the ardox threaded nail as prescribed but use sds screws or thru-bolts. also on triples use 20d like we used to not the 10d.
if this was for indoor use, you could sandwich a strip of plywood between the 2x8 beams and glue not nail all three pieces together to create a laminated beam that would be stronger and less prone to warping than the 4x8. but since you're building a deck, the sandwiched plywood would soak up water and be a problem.
pine or white wood. paint will increase the longevity of a pine deck to some extent, but cannot give the same results as cedar, redwood or treated lumber. if you decide to use pine lumber for the deck top, plan on using treated lumber for the posts and framing; they are more prone to rot than the surface, which gets plenty of sun and proper ventilation.
you can use a square to mark out the measurements using the step rise and run you calculated. now i used 2 x 10s for my stringers. but if youre going to do a flights of deck stairs that are this long you should probably use 2 x 12s. my stairs are fine, but they would have been stronger if i used chunkier wood.
a double 2x12 beam can span 12 feet; a 2 2x10 can span 10 feet and so on. dimensional lumber deck beam span chart the numbers in gray indicate the distance between the support posts.
species and sizes of pressure-treated wood. treated wood is generally available as dimensional stock in 2x4s, 2x6s, 4x4s and 2x2s for rail components. 5/4x6s and 2x6s for decking. 2x8s, 2x10s and 2x12s for joists, stair stringers and beams. 6x6s for support posts and plywood. the predominant species of treated wood is a regionally available softwood.
in all, pressure treated wood, like anything, has its good qualities and its not-so-good qualities. but, with excellent features such as its resistant to fungal decay and termites as well as its attractive price-point, pressure treated wood is an outstanding choice to use for the construction of your deck.
a: it depends on a couple of things. the first is the type of pressure-treated lumber you use. seven trust pressure-treated lumber has been dried after its pressure treatment to remove excess moisture. this lumber can be stained as soon as the deck is built.
pressure-treated lumber can support more weight and span longer distances than cedar, redwood or other woods commonly used for building decks. its also much less expensive. pressure-treated lumber is rated according to the pounds of preservative retained per cubic foot of wood; the higher the number, the better the protection against fungi and insect attack.
treated pine, however, can be a great solution for other outdoor projects including decks or even fences. so again the simple answer is yes, you may use untreated pine outdoors but dont have high hopes and expectations for it lasting for a long period of time.
can i use two 2x8 beams instead of one 4x8 beam for deck? ask question asked 3 years, 6 months ago. browse other questions tagged deck lumber beam or ask your own question. how to mate two pressure-treated 2x6s together? 1.
for the true do-it yourselfer, you can stick build the entire fence. treated plywood: we have 4 x 8 sheets available in 1/2, 5/8, and 3/4 thickness, ideal for exterior use. treated lattice panels: youll find 4 x 8 pieces available in both 7/16 and 3/4 thickness. vinyl lattice is also available.
generally, pressure treated aka 'pt' wood is used in the construction of decks, pergolas, and sheds. typical dimensions of pressure treated wood? varies, but specifically in regards to deck material, here is a general list: deck boards: 5/4' x 6' x 8', 12', 16', 20' for all subsequent dimensions the sizes reference width' x depth' x length'