We made our hall closet a more open concept with a floating bench. I built a 2×4 frame about 36wx24d with a center support. I screwed it into the back corner studs, one stud in the back wall, and a stud on either side walls (see photo). I’m 120lbs, so it’s been holding up wonderful. However my husband used it recently and I notice a sinking/bounce when he sat on it. My thought was that it was cause because the left side stud is about 8 inches back, so the front on that side has a little give. Now I’m worried this design isn’t strong enough to hold heavier guests. Two screws per stud.