When a plank is too short or not wide enough a butt joint can be used to complete the run. A backing plate is made from oak and sealed. The joint must be planned to occur between frames with support from planks above and below; in other words the joints must be staggered for strength. In the first picture you can see the oak butt block projecting above the run of the planks butted. Copper rivets and roves hold the two ends of the cedar plank to the block. The second picture shows the finished enclosed joint. The resulting seam will be caulked along with the rest of the seams when planking is complete. This is one of Spyder's joints.
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