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A tapered scarf or scarph joint is a diagonal joint cut on a 1:8 to 1:12 slope and is as old as the half lap joint. It is commonly found in beams, skids or other horizontal members joined together with wooden pegs or bolts and plates. The scarf joint requires some modifications when used to extend a post.
It’s very important that you don’t fill the center of your sleeve with concrete or gravel, though because this is where you will set your removable fence post when it’s in position. Finding extenders for concrete posts may be a little tougher than other materials. Extenders for concrete posts will be made of metal, wood, or vinyl. They should look like these. They will be slotted on either side, so that fence panels will slide in and fit snugly. That’s about it when it comes to our simple DIY removable fence post design. As you can see, it’s relatively easy to manufacture, lends itself to several applications, and can be manufactured from readily available materials. A hollow 10” to 24” metal pipe, 1” to 1-1/2” in diameter, inserted into a hole drilled vertically into the center of the ends of the two 4×4 to be butt joined, provides additional lateral reinforcement. The pipe is secured into the vertical holes with construction adhesive. Two 1/2″ through bolts are inserted into the top and bottom post pieces in holes bored through the wood and pipe.
Why Is This Removable Fence Post Only for Non-Snowy Areas?
Follow the manufacturer’s instructions or Structural Engineer’s recommendations for the screw pattern. You should paint the extensions with the same steps that the original posts were painted, to ensure that they look as exact as possible. 8. Your Fence Is Ready For Panels Joining 4x4s together to extend their length can be as easy as a butt joint or as complex and elaborate as a keyed, double tenoned scarf joint. However, some cuts are better done where the timbers can be rolled easily and joints tested for alignment and fit. When working on posts under load or limited space, simpler connections are better.
If the original fence posts are painted then you will need to paint the extensions to match. You can do this before you attach them, but I think they are easier to paint after they are already attached. Make sure that you choose a day that is sunny and there is no rain in the upcoming forecast. Whatever material the posts are made of, it would be smart to drill holes where you want the screws placed first. Then go ahead and put the screws in place. Doing this will prevent damaging the screw. It will also ensure that screw goes in the right direction. Make sure that the drill bit you use to create the holes is the same size as the screws you’re going to use. Go ahead and place the extension into position. Before you will screw it in use a level to make sure the extension is as level as you can get it. This is a really important step as not making sure the extension is in place will cause problems for your fence later. 6. Screw The Extender Into PlaceOur choice for the strongest and easiest way to join two 4×4 posts is a half-lap joint that is glued, plated, and bolted. Cutting a half lap into an existing fixed post is easier than all other cuts, except the butt joint. The two required cuts per post are simple and doable even with limited space. The simplest way to connect two 4x4s is with a butt joint. Trim the ends to be joined so they are square and smooth. Any angle, however small, can act as a shear line, and a smooth flat surface makes for a better connection. Two other reasons rest on transportation and availability issues. Carrying and connecting two 8-foot lengths is easier than transporting a 16-foot length, especially if traversing woodland trails. The availability of long 4x4s at many small suppliers is often limited due to low demand, making splicing a necessity. Repair
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