Screws, girts and spans

Now, this is a self-threading screw, and they have different Tek finishes on. These are Tek points, and they are from a 14-gauge cold-rolled steel purlin to a hot-rolled quarter-inch structural steel girt. So these are tied in, and there's two per panel, per joint, or per, it just depends on what your load spans are, the L/180 load. Typically, these would be put in on, I would say, on a two-inch panel, I would just ascertain probably a six-foot span with your girts, and on the heavier panels, you can get up to probably eight-foot spans before you have to fasten these back to the girts,