How To Connect Two 4X4 Post Together | Best Two Process


People loves to decorate their house, and wooden materials are the first choice for them. However, besides the decoration in some situations, we have to think about safety. Such as to make a dining table, stair railing, balcony railing, etc. In making all these things, Wood enhances the beauty and ensures safety. Today we are speaking about how to connect two 4X4 posts. This is a standard post size. We must remember the 4X4 post is very strong to use vertically and used in railing but not that much secure to use it as a beam.

People use many processes and formats to connect the posts together. Here we explain the best two strong and popular methods for joining posts. First, we will explain the tools that we need to do the task; after that, we explain the joining system.

The process to Connect two 4X4 posts:

1. Connect posts using brackets:

Necessary Tools: 

· Two 4X4 wood post

· 4X4 brackets

· Glue

· 2” Decking screws

· Screw guns

· Pencil.

Step-1 Check the basement: We consider the beam as our basement. First, check the beam where we want to set the posts. We must check the head and measure its size. For a beam, the standard size is 6×6. So, we assume that the beam size is 6 by 6. 

Step-2 Set the brackets: Secondly, we set the brackets on the beam’s one side and mark the screw points with a pencil. Similarly, mark the other side as well. After that, set the bracket again and filling 2” decking screws with screw gun on the mark points.

Step-3 connect the posts: Finally, we set the two 4 by 4 posts on the beam and Align them properly. Now, filling 2” decking screws with screw gun at both sides of the posts.

This is how we can connect 4×4 posts together with brackets. 

2. Connect two posts with nuts and bolts: 

Necessary Tools: 

· Two 4X4 wood post

· Miter Saw and 18degree protractor

· 5”/6” Nut bolts and washers

· Drill machine and wrench

· Small kneeling brush

· Pencil and sandpaper 

Step-1. Measure the post for cutting: In this process, we can joint independently two posts without using any basement. To do this process, we have to take measures for cutting both posts from the end sides. Use an 18 degree protractor and set a 30 degree or 25 degree angle on both posts and mark a point. Now make a line on the points from one side to another side. 

Step-2. Cut the posts: After making the angles with Pencil, now we have to use the miter saw to make angels at the posts. Set the posts vice-versa. Remember, two angles size must be equal to 4×4 post size. Now sand the cutting surface for smoothing.

Step-3. Drill for nuts and bolts: Here, we set the posts angle head to another angel head vice versa, and it will look one long post. Now use a drill machine to make three holes for nuts and bolts. The holes intersect into the angel parts of both posts at the same point. From the top, it looks like one hole though there are two posts so that each nut and bolt could connect the two posts strongly.

Step-4. Joint the posts: Put the bolts and keep washers immediately before nuts into the holes. Then make use of a wrench to tighten the thread as much as you can. 

This is how we can connect 4×4 posts together with nuts and bolts.


It is a prevalent task all over the world. If you work to make stairs railing, balcony railing, yurt platform, and wooden house, you need to know how to connect two 4X4 posts. You will face this issue. I hope this article supports you in getting a good understanding of this topic.


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