A strap was needed with 1000 pound breaking strength using 1″ polyester webbing that has a minimum breaking strength of 1000 pounds. We needed to test stitching patterns to come up with one that would provide the breaking strength needed and still be economical to sew.
Here is a test of a Double-W stitching pattern using Tex 90 polyester thread. As you can see we have exceeded the 1000 pound requirement and when the load was relaxed both the webbing and stitching looked great.
We also tried a few other stitching patterns but this one performed the best. The others would hold the load but afterwards it was obvious that they had been strained.
If your project requires something a bit out of the ordinary give us a call and let us offer some suggestions. (253) 883-5800