Iron Gate Posts and Footings in Williamson County

Stand beside an iron gate post and push it at the top: if it moves at all, the footing is too small for the leaf. Heavy iron pulls a post forward with a force that grows with the width of the gate, and the ground in Georgetown, TX is split between rock and clay, and iron gates georgetown the derek bordeaux group covers posts before it covers hinges. The post is the gate.

How big should the post be?

A heavy iron leaf of ten feet or more wants a post of at least four inch square tubing with a quarter inch wall, and six inch for a wide dual swing. A larger post resists bending and lets the weld on the hinge carry the load. A thin post bends a little each time the gate swings and the leaf slowly drops.

How deep does the footing go?

The footing should reach at least a third of the above-ground post height, which means thirty inches for a light leaf and forty-two or more for a heavy one. Concrete is poured to a diameter at least three times the post width. A footing that stops short rocks as the clay swells and shrinks.

What does limestone soil change?

Limestone soil in the west of Williamson County is hard, and a hole stops at a ledge. A rock bit drills into the ledge, and the post is set in epoxy or a dowel is grouted in. That is stronger than a deep concrete column in loose ground. The work is slower and needs a drill, not a post hole digger.

What does clay change?

Clay swells in wet weather and pushes the footing sideways and up. A bell-shaped footing, wider at the bottom, resists being lifted. A smooth sleeve around the upper part of the post keeps the clay from gripping it. Gravel at the base drains water away from the steel and the soil under the concrete.

How long before the gate hangs?

Three days of cure are the minimum before the leaf is hung, and a week before an operator is mounted. Concrete walks at a day but a hinge loads it with leverage that a green footing cannot hold. A leaf hung early shifts a quarter inch, and the latch misses from then on. Rain in the first days also matters, so a fresh footing is crowned and covered when a storm is forecast.