Hello DIYers, I plan on redoing a terrible deck (from previous owner) in my back yard. Located in Central PA outside of Philadelphia. I've been looking at the AWC.org guide a lot and have learned a bunch but I have two questions that I am unclear about. My deck with be 31 1/2' x 14'3". It will be constructed of Southern Pine PT 2x10. 6x6 posts on concrete footings. Joist 16" OC. Supports Beams 2-2x10s, and Trex decking. Deck will be attached to house. I will also be using joist hangers on ledger and rim board (I think that's the correct term). The previous deck was the same size and the Trex was there previously. We're salvaging most of the Trex except the pieces where the put 10 screws in a 3 foot piece. The others were attached with hidden fasteners so it's still in good shape.The deck I removed had 4 supports at the end but nothing in the center. I also don't think they had the posts in concrete. The 2 center posts sank and pulled the ledger away from the house and the center of the deck dipped about 2 inches from the corners. The joists were also spaced anywhere from 16" to 24". I plan on doing 8 or 10 posts. Half in the front and half in the middle. It is likely overkill but if you walked on the previous deck, you would probably understand my reasoning for adding some supports in the center. My question is this;For a joist span, according to the awc table, my supports posts must be less than or equal to 6'6" apart on a 14' joist span. My joist span will be 14' from the house, but if I add additional center supports does that reduce my beam span according to code? Or is the beam span only related to the total beam length from the house to the rim board?I hope my question makes sense, if I'm missing some info that will assist with an answer, please let me know. ThanksAlso. If you have any tips that you want to throw out there, don't be shy. More information is better than not enough. Thanks again! via /r/DIY http://ift.tt/2umTJ7O
