Building a deck is a an excellent way to prolong the out living room of a house or business. Making sure it is solid and also structurally sound indigenous the ground increase though, is frequently a matter of 4×4 vs 6×6 deck post. The local structure code should identify which is agree in your area yet may website both with given parameters. So, i m sorry is better?

The fill capacity that a 3-foot #2 grade 4×4 is 17,426 pounds, and a similar 6×6 is 20,834 pounds or 16% better. However, an 8-foot 4×4 supports 6468-pounds and also 2339-pounds at 14-feet, when a 6×6 is 18032 and 10550-pounds dong – or 64% and 78% much more load capacity. So, for write-ups 3-feet and also shorter, the a issue of preference, above 3-feet use 6×6.

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In this article, we’ll define 4×4 and 6×6 posts, when and also where to use them, exactly how to secure them to a beam, and also the spacing between article supports. We’ll additionally look at posts for deck stairs and deck railings. By the end of your read, you’ll have the ability to identify which post is much better for your deck building to ensure it is structurally sound and code compliant.
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Decks the are more than 30-inches above grade must have railings extending at least 36-inches above the deck surface. The railing or guard write-ups must it is in nominally a minimum the 4×4 and also fastened perpendicular to the pickled in salt joist with (2) 1/2″ through-bolts and washers. The 4×4 have to not it is in notched to the deck.

A 6×6 will occupational as a railing short article too yet is over-kill unless there are other aesthetic or structural factors for the more heavier posts. The 6×6 is larger and checks and cracks will be an ext visible, however, it may not twist or bend like a 4×4. It can be notched by as much as 2-inches to sit ~ above the deck and also fasten come the in salt board.

The format of railing or wanted look might require a various post, but for many deck railings 4×4 short articles work well. Once they room tied in with the top and also bottom rails and also the railing cap board attached, they’ll withstand twisting and bending.

Conclusion

The choice of 4×4 vs 6×6 deck short article depends top top the neighborhood codes, deck dimensions, and also aesthetics. While a 4×4 under 5-feet will execute the same job basically as a 6×6, the much more solid timber resists bending and also twisting lot better. So, whether the short article is 1-foot, 8-feet, or 14-feet high, most builders and also DIYers choose the 6×6 together a more solid and code-compliant support post.

I hope you have actually a better understanding of the similarities and differences between 4×4 and also 6×6 deck assistance posts, stairway posts, and also railing posts, and how to fasten posts and beams together.

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If you discovered this post a good guide to help in the selection and securing that deck assistance posts, you re welcome share it v others. Together always, her comments and also suggestions space appreciated.