To install an Anti-Sag Gate Kit: Attach Corner Brackets: Attach the metal corner brackets to the top of the hinge side of the gate and the bottom of the latch side using screws. Attach Turnbuckle: Unscrew the turnbuckle, and attach it to the top metal corner bracket. Click to see full answer. In this way, how do you keep a gate from sagging?Attach a metal bracket to the upper corner of the gate (on the hinge side). Mount another bracket diagonally at the lower corner of the gate on the latch side. Attach cables to each corner bracket and then to the two ends of a turnbuckle. As you tighten the turnbuckle, the latch side of the gate rises.Secondly, why do Gates sag? Garden gates sag because a square (or rectangular) frame is essentially unstable. Built with standard DIY woodworking joints, the gate will twist unless it is braced or pulled into tension. In this manner, which way does the brace go on a gate? Over time a wooden gate will tend to sag. So you need a cross brace. If you are building the cross brace using wood, the cross brace should be in compression. So the cross brace will go from the corner with the bottom hinge to the top corner on the other side.Where do you put hinges on a gate?Generally, the hinge is placed at the top and bottom of the gate. For heavy gates, a third hinge is added in the middle to support the weight. Mark Holes: This is the first major step towards hinge installation. Grease pencil is the best instrument to mark the hole.