Use local depth and soil information
Generic internet ratios do not replace local frost depth, code or manufacturer guidance. Loose fill, clay, rock and high water tables can require different approaches.
Keep water from becoming the hidden load
Poorly drained holes, trapped water and buried wood interfaces can accelerate movement or decay. Top grading should direct surface water away while respecting the approved foundation design.
Treat gate and end posts differently
Gate posts resist hinge torque; end and corner posts resist rail and tension loads. They may need larger sections, stronger foundations or bracing than line posts.
Use a consistent comparison
Compare alternatives against the same project brief: purpose, length, height, gates, site access, exposure and expected maintenance. This prevents a basic option from being compared with a more complete one that includes better posts, hardware or preparation.
For this subject, give special attention to use local depth and soil information, then test the plan against keep water from becoming the hidden load and treat gate and end posts differently. A decision that works only under ideal conditions is not yet a dependable plan.
Questions to settle
- What site fact or local rule confirms the approach to use local depth and soil information?
- What trade-off created by keep water from becoming the hidden load is acceptable, and who accepted it?
- How will treat gate and end posts differently be inspected or maintained after the fence is complete?
- Which part of the decision depends on a manufacturer, local authority, utility service, surveyor, contractor or engineer?
- What changed condition—soil, grade, use, neighbour access, climate or damage—would require the plan to be reviewed?
Records worth keeping
Photograph post locations, foundations, reinforcement, utility markings and concealed connections before they are covered.
When to pause and get local help
Pause excavation or assembly when the ground, structure or utility information differs from the plan. Unknown buried objects, unstable soil and unverified walls deserve local qualified review.