Yes, I did forget to mention that our trailer is completely gutted, and the belly pan is OFF. Here is a picture and I'll post the progress on getting the floor in, if that ever happens. It's summer and everyone wants work done on their house, so my husband is busy. Doing it myself is asking for trouble. Here is a picture of what we have cut. Well, he cut and I treated. I'm sure we'll have to trim the edges once it's laid down under the C-channel and over the frame.
We just cut out a cardboard box to flat, held it under the trailer, and traced it onto the box. Cut the corner, and then duplicated it the other side, only we turned the cardboard template upside down. As Uwe and others mentioned, there's no standard template for floors...you just have to freehand it any way you can.
Here's the picture. I hope this was of some help but I have a feeling not much!!
"Let's look Death in the face and say, 'Whatever man.'"
1967 24' Tradewind #19104 ~ Forums #4449