How to Calculate Ridge Post Location on Intersecting Angled Floor Plan
The video explains two methods for finding the location of the posts on an intersecting angled floor plan for home building. The first method is for a square floor plan, and the second method is for a rectangular floor plan.
The video starts with going over the basics of finding the center for a post on a square floor plan. The speaker says that all you need to do is snap a line across and connect the corners. This can also be done by splitting the square in half and snapping a line from half of the distance of the square and half of the distance on the other side.
For example, if you have an 8-foot square, you would just snap a straight line across at the 4-foot mark, and then come across another line at the 4-foot mark on the other side. This will give you the center point for your post.
The speaker then explains that this method cannot be used for rectangles unless you are building a roof like the one in the video, which is not a common way to build a roof. For a rectangle, the most common way to find the center of the roof hip is to split the distance in half, pick up the ridge at the center of the building, and then come back and take that distance again.
This will provide you with the intersecting point. In most cases, these hips are going to be at a 45-degree angle coming off of a 90-degree corner and they are going to intersect at the center of the building.
Greg then moves on to how to find the location of the posts on an intersecting floor plan. They use the example of an 8-foot by 8-foot intersecting area. Here, you would simply snap a line across and connect the two points together.
If you go back and look at the first drawing or illustration in the video, you will see that the valleys look like they are going straight up even though they are at an angle. This line will provide you with a place to position your post if you were going to have a post that would be supporting a ridge beam in both directions.
Then lists the angles for this intersecting floor plan: 45 degrees, 65 and ½ degrees, and 112 and ½ degrees. They explain that you would use the same methods to figure out the hips and the location of the post for a rectangle that is intersecting another rectangle. This method applies regardless of the size of the building.
