Understand how wood and steel posts differ in resisting moisture and supporting horizontal privacy panels, while sharing the same concrete footing depth rule.
Wood posts can rot at the ground line where clay traps water. Steel posts hold tall, solid horizontal privacy fence panels straight against wind load. The one-third depth rule for concrete footings applies to either material.
Steel posts can support horizontal wood boards.
Both post types depend on concrete footing depth and the clay supporting the base.
Steel posts hold tall, solid horizontal panels straight against wind loads. Both need concrete footings that follow the one-third depth rule.
**Steel is the better post material for a tall horizontal privacy fence.** Steel holds a solid panel straight against wind across long horizontal board runs. It also does not rot at the clay line. Wood posts can support the same fence style, but they can rot below the grass while appearing sound above ground.
For horizontal designs, compare the post material listed in each proposal. Steel posts support tall, solid panels against wind load. See our horizontal fence installation and sliding gate project for a related example.
Metal posts can extend above a wood fence, and exposed construction makes the wood and metal components’ fit clear.
When comparing proposals, check whether the posts are wood or steel and whether the footing depth follows the one-third rule.
Expansive black clay soil is the reason many DFW builds fail. Clay expands as it gains moisture and shrinks as it dries.
Clay heave can push our fence posts upward, contributing to clay-related fence leaning.
Contact our team at Star Gate And Fence. Request an on-site review of post material, footing depth, clay conditions, and gate requirements.
For a six-foot privacy fence, we use a minimum three-foot concrete footing to resist clay movement.
The one-third depth rule means a three-foot concrete footing for a six-foot fence, including steel-post fences in expansive clay.
Automated vehicular gates also need ASTM F2200 and UL 325 compliance where those standards apply.
Check local permit and licensed-trade requirements before work begins.
Ask for these details when comparing proposed wood-post and metal-post designs:
We provide wood fence installation, HOA fence installation, and commercial fence installation.
Yes. A wood post can look normal above the grass while rotting underground at the ground line. Clay can trap water around the post, while repeated expansion and shrinking can move the footing.
The review should also cover corners, openings, gates, and other moving components.
Yes. A gate adds an opening and moving parts. Automated vehicular gates also need ASTM F2200 and UL 325 compliance where those standards apply.
Tell us your city and what you need built or repaired, and our direct employees will assess the site and quote the work in writing.
