Sign Post Wind Load Calculator
Wind force and base moment on a sign or hoarding post.
A modest 2×1 m sign at 3 m generates ~4.3 kN·m per post pair member in design wind — that's a 100NB heavy pipe, not the fence tube most signmakers grab. Solid signs use C_f ≈ 1.2–1.8.
Formula
Sign Post Wind Load Calculator is a free sign wind load for structural engineers, fabricators and site engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Sign Post Wind Load Calculator
Wind force and base moment on a sign or hoarding post. The calculation implements F = C_f·p_z·A; M_base = F·h_c/n_posts (IS 875 Part 3 / ASCE 7 — solid signs). A modest 2×1 m sign at 3 m generates ~4.3 kN·m per post pair member in design wind — that's a 100NB heavy pipe, not the fence tube most signmakers grab. Solid signs use C_f ≈ 1.2–1.8.
How to use Sign Post Wind Load Calculator
- 1Enter Sign width in m.
- 2Enter Sign height in m.
- 3Enter Height to sign centre in m.
- 4Enter Design wind pressure in kN/m².
- 5Read Total wind force (C_f 1.2), Base moment PER POST instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Sign Post Wind Load Calculator?
- ✓Implements the standard formula — F = C_f·p_z·A; M_base = F·h_c/n_posts
- ✓Reference cited on-page: IS 875 Part 3 / ASCE 7 — solid signs
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Sign Post Wind Load Calculator use?+
It computes F = C_f·p_z·A; M_base = F·h_c/n_posts, per IS 875 Part 3 / ASCE 7 — solid signs. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
A modest 2×1 m sign at 3 m generates ~4.3 kN·m per post pair member in design wind — that's a 100NB heavy pipe, not the fence tube most signmakers grab. Solid signs use C_f ≈ 1.2–1.8.
Can I use this for real structural design?+
It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.
Is the Sign Post Wind Load Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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