Where the inner loop at the base of the Roadrunner meets the main chair profile there are no visible welds from the sides. We like it that way: you can see clearly where the two pieces of flat bar meet, each with the slightly rounded edge that's typical of the hot-rolled material we use, making a clear and clean seam that lets you read how the chair is built. But the thing still has to hold together and for that we use plug welds: holes filled with weld where two pieces meet, in this case on the underside of the chair, out of view. Check out the detail shots of the chair in the SHOP section of the site to see what we mean (at least about the clean and clear seam). These here were drilled in the inner loop before bending and will be deburred before they're attached to their mates. Meantime we arranged the pieces into pretty rows, like we always do.