JOISTS VS BEAMS QUESTION

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  #1  
Old 06-18-01, 07:26 PM
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I am planning to build a deck that is 40 ft long and will be on a slope . it will be 18 in high at one end and 46 inches high at other end and the width will be 9ft to 13 feet.

My questions include:
1) Can 2x8 joists suffice with 2x6 decking

2) Is it necessary to set joists on top of beaMS OR CAN JOISTS BE ATTACHED TO 4X4 POSTS

3) IS IT POSSIBLE TO BUILD THIS FREE STANDING AND NOT ATTACH IT TO THE HOUSE
 
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  #2  
Old 06-18-01, 10:27 PM
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Starting with question #3, yes, you can build it freestanding. Use Simpson embedded post bases in your footings and attach your posts to them. You can cantalever the joists up to 2 feet from your beams.

Question #2 -- you'll probably find it will be easier to use beams for your joists rest on. Simpson makes several post-to-beam connectors, and beam-to-joist ties. Mounting your joists directly to the post will reqire a lot more posts and footings.

Question #1 -- 2X8 joists can be made to work, as can 2X6's, 2X10's or even 2X12's. The size of the joists will determine how far they will span between the beams (how far apart the beams can be). The size of the beams will determine how far apart your posts will be. Check with your local bldg. dept. Things like snow load, the type of wood you will be using, the size of the footings, etc. all enter into the equation of determining how far the spans can be.
 
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