</font><font color="blue" class="small">( " Ok I think I am starting to get my ideas together. I am going to put a 12'x18' deck on and have a few questions:
1. If I use 2x8 floor joists then what would my spacing need to be on my posts?(I imagine I'll probably use 4x4 posts)
2. I am guessing that 2x6x12' boards would be perfect for the deck flooring.
3. What size wood is needed for the stair joists(the side boards of the steps that I will need to cut/notch for the steps). I believe it will likely be 4-5' off the ground on the back side so it will likely have 4-5 steps on it.
4. What should I do for hand rails? I would like to build in a couple of benchs on the sides for sitting down/putting on shoes/etc.
This is a deck for the farm and I am not looking to do anything very fancy or over the top. Any advice would be appreciated becuase I am going to try to start getting some sort of a material list and hopefully get it bought by the first of next week.
Thanks again! )</font>
1. 2x8 joists are fine, but joist size does not determine post spacing. Beam size does. I need to know the beam size, but for arguements sake, let's say you use a 2) 2x10. If there's a 2' cantilever, the post spacing would be 7'-0". If there's no cantilever, then post spacing would be 6'4".
2. 2x6x12 would be fine, however, 2x6x20 would make a nicer deck with no butt joints. Drawback is that you'll have several 2' pieces wasted. Consider building a 20' or 16' deck if you want a seamless deck in the same size range you desire with no butt seams. You can buy 16' or 20' 2x6 and have no butt seams.
3. Use 2x12 to build your stair joists or "horses". If it's 4'-5' off the ground it will have more like 7-9 treads & risers as max recommended riser height is usually 7".
4. Handrails? The choices are limitled only to the imagination. I recommend 36" final height to meet code. Install a 4x4 post every 4 to 5 feet for strength, the install 2" square or decorative ballusters in between with gaps no greater than 4". Cap the rail with a nice piece of 2x6. Best thing to do with rails is find a picture of one you like, then copy it as best you can maintaining a 36" minimum height and no more than 4" spacing.