The Most Important Part of Your Fence
The gate is the only moving part of your fence. While a leaning fence is an eyesore, a sagging gate is a functional failure. In the shifting Blackland clay of North Texas, gates are subjected to extreme stress. If you don’t build it with a square, braced frame, the weight of the wood will eventually pull the gate out of alignment, causing it to drag on the ground or fail to latch.
At Fence Supply Inc., we recommend a “Steel-First” approach to gate building to ensure yours stays swingable for decades.
1. The Foundation: The Gate Post
A gate is only as strong as the post it hangs on. Because the gate exerts “leverage” on the post, a standard line-post setting isn’t enough.
- The Hinge Post: We recommend a Schedule 40 (Heavy Wall) 2-3/8″ Steel Post for all gates.
- The Depth: Set your gate posts 6 inches deeper than your standard fence posts (aim for 30–36 inches).
- The Concrete: Use a minimum of 3 to 4 bags of concrete per gate post to prevent the post from leaning under the weight of the swinging gate.
2. Squaring the Frame: The “Anti-Sag” Secret
Gravity wants to turn your rectangular gate into a parallelogram. To prevent this, you must “square” the frame and then “brace” it.
Option A: The All-Steel Frame (Recommended)
We stock Adjustable Steel Gate Frames. These telescoping frames won’t warp, shrink, or sag like wood.
- Assembly: Simply slide the steel tubes to your desired width and bolt them together.
- Benefit: Since the frame is rigid steel, it stays perfectly square regardless of how much the cedar pickets expand or contract.
Option B: The Wood “Z-Brace” Frame
If you choose to build a traditional wood frame, you must use a diagonal brace.
- The Direction Matters: The diagonal brace must run from the bottom hinge corner to the top latch corner. This allows the brace to act as a “column,” pushing the weight of the latch side back into the hinge post.
- The Cut: Use a miter saw to cut the brace at an angle so it fits snugly between the horizontal rails.
3. Squaring the Gate (The Diagonal Measurement)
Before you tighten your bolts or drive your final nails, you must verify the frame is square.
- Measure the diagonal from the Top Left to the Bottom Right.
- Measure the diagonal from the Top Right to the Bottom Left.
- The Goal: These two numbers must be exactly the same. If they are off by even 1/4 inch, your gate is not square and will eventually sag.
4. Hanging the Gate
Do not attach your pickets until the frame is hung and swinging.
- The Gap: Leave at least 1/2 inch to 3/4 inch of clearance between the gate frame and the posts on both sides. This allows for the natural movement of the posts in North Texas clay.
- Hinge Placement: Place the top hinge as high as possible and the bottom hinge as low as possible. This distributes the weight across the maximum length of the post.
5. Hardware for Longevity
In the DFW climate, standard “big box” hardware often rusts or binds.
- Gravity Latches: Simple and effective, but requires manual adjustment as soil shifts.
- Magnetic Latches: Highly recommended for pools; they are much more forgiving if the gate moves slightly.
- Drop Rods: For double-drive gates (10′ or wider), a heavy-duty drop rod is essential to lock the “stationary” side into the ground.
Build a Gate That Lasts
Don’t let a sagging gate ruin your new fence project. We stock the steel frames and heavy-duty hinges the professionals use to combat the Texas elements.
