If you have ever tried to trim half rectangle triangles or split quarter rectangle triangles with a regular ruler and felt like you were fighting the fabric the whole time, this post is for you.
I recently released the BeeLiner HRT 2.5 Trimming Ruler, and I want to walk you through exactly how to use it. Whether you already have one in your hands or you are trying to decide if it belongs in your ruler collection, by the end of this post, you are going to understand why I designed it and how it solves a very specific trimming problem.
Why I Designed This Ruler
I have been working on a new pattern called Sly Spark, which features split quarter rectangle triangles. A split quarter rectangle triangle has one fabric on one side of the diagonal and two fabrics on the other side, which means there are three fabric sections and two seam lines to align when you trim.
When I started trimming these blocks with a regular ruler, I ran into a real problem. The four corners were lining up reasonably well, but the center seam placement was inconsistent. Some blocks were sitting higher, some lower. The center cross did not line up evenly across the row. It worked, technically, but it was not as accurate as I wanted, and it was taking way more mental energy than it should have.
I stopped trimming. I designed this ruler. I had it manufactured by Laser Cut Quilts, and now I want to show you how to use it.
What Makes the BeeLiner HRT 2.5 Different
The thing I love most about this ruler is what it does not have. There are no extra lines to sort through or ignore. It has exactly what you need and nothing else. For those of us who find a busy ruler genuinely distracting, that matters.
Here is what is on the ruler and why each element is there.
The diagonal line does not go corner to corner. With a half square triangle, the diagonal runs from corner to corner because the seam meets the corner perfectly. But because half rectangle triangles work at a non-90-degree angle, you need the diagonal to land a quarter inch in from the corner in both directions. That offset is already built into the ruler. You do not have to calculate or estimate it.
The center circle gives you a fixed anchor point. This is the feature that solves the problem I was having. Instead of trying to eyeball the center from the edges, you place the center point of your block directly in that circle and lock it in before you do anything else. That is your starting position.
The seam lines give you visual confirmation that everything is aligned. Once the center is placed, you rotate the ruler until the long seam and the short seam of your block both line up with the seam lines on the ruler. When three things line up, the block is good.
How to Trim a Split Quarter Rectangle Triangle Block
Start by identifying the center of your block. That is the point where the diagonal seam meets the center seam.
Place that point inside the circle on the ruler. This is your anchor. Do not move the circle off this point as you adjust.
Rotate the ruler gently until the long seam of your block lines up with the corresponding line on the ruler, and then confirm the short seam lines up as well. When all three reference points are aligned, the block is positioned correctly.
Cut one side, then the adjacent side. Then rotate your block (you do not have to flip the ruler) and re-anchor the center circle. Line up the cut edges and the seams, confirm the center, and cut the remaining two sides.
That is it. The center lands in the same place on every single block, and when you sew those blocks together in your quilt top, they line up all the way across.
What to Do When a Block Is Sewn a Little Off
This comes up, and I want to address it directly because I am not redoing perfectly usable blocks.
If your seams do not line up perfectly with the ruler lines, do not panic. Start with the center circle as your anchor, then split the difference between where the seam lines ideally fall and where your actual seams are. The center placement is the most important thing. The seams can ease in when you sew the top together. Use the ruler lines as guides, not as a reason to throw out a block.
Which Patterns Work with the BeeLiner HRT 2.5
Right now, the BeeLiner HRT 2.5 works with the Hush Punk pattern and the upcoming Sly Spark pattern. It trims 2.5 x 4.5 inch finished blocks and handles half rectangle triangles, split quarter rectangle triangles, and quarter rectangle triangles.
I also have a full tutorial on using a regular ruler for Hush Punk half rectangle triangles inside the Hush Punk Companion Course if you want to go deeper.
And honestly? I love this block shape so much that there are more patterns coming. This ruler is going to get some mileage.
Where to Get It
If you have questions about using it, drop them in the comments on the video or come find me and the rest of the quilter bees inside the Hive community. I would love to see what you make.
Warmly, Mitzie 🐝
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