Decks, Patios, Porches and Docks - Deck Beam
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06-27-00, 08:21 AM
I am ready to install my 4x4 posts and attach the beam to it for my joists to rest on. Which way is better (stronger) for attaching the posts to the beam?
a) Allowing the beam (2) 2x8's to sit directly on the posts.
b) Installing each 2x8 on either side of post. sandwiching the post between the beams.
a) Allowing the beam (2) 2x8's to sit directly on the posts.
b) Installing each 2x8 on either side of post. sandwiching the post between the beams.
06-28-00, 04:41 AM
Resting the dbl 2X8's on top of the post is stronger. You are letting the posts bear the weight, not relying on the nails (or screws) that attach the 2X8's to the post to bear the weight. I would suggest using Simpson or USP brackets to tie this all toghether
06-28-00, 05:28 AM
I am not disagreeing with Lefty, but I always sandwich the 4x4's but I connect the 2x8's and 4x4 together with two 3/8" bolts.
The bolts will never break, and the downward pressure on the 4x4 will keep it straight.
It will also make a better foundation for the top deck when you get to that point.
The bolts will never break, and the downward pressure on the 4x4 will keep it straight.
It will also make a better foundation for the top deck when you get to that point.
06-28-00, 03:51 PM
Could also depend on whether you are putting the joists on top of the beam or are using joist hangers to attach them to the sides of the beam.
06-29-00, 07:22 AM
I am resting the joists on the beam, not using joist hangers on that end- I would like to rest the beam on the 4x4 but it looks like the sandwich method is a little easier to install
06-30-00, 06:19 AM
EITHER method is acceptable and will work fine. The key is that you have to put the joint together PROPERLY. If you choose to sandwich the posts between the 2X8's, through-bolt them with 2 3/8's bolts, as Jack described. Those bolts are what will make the difference between a strong joint and a weak one. If you choose to rest the 2X8's on the posts, use an approved Simpson (or similar) post cap at each joint, and nail or bolt it per the mfgr's instructions. As to which method is best, well that's just like asking who makes the best car. You won't the same answer from everybody you ask!
06-30-00, 09:46 PM
Or asking a bunch of carpenters which is the best way to build a deck, or a header, or a partition "T", or a wall corner, or gapping deck boards, etc.
I use the method that Jack described when I choose to use a girder to support the joists. Usually the homeowner chooses to run the deck boards parallel to the house and this is not necessary.
More than a Carpenter
http://www.carpenter.cjb.net
I use the method that Jack described when I choose to use a girder to support the joists. Usually the homeowner chooses to run the deck boards parallel to the house and this is not necessary.
More than a Carpenter
http://www.carpenter.cjb.net