Pylon Wind Load Calculator — NSCP 2015 / ASCE 7-16

Input Parameters

Basic Wind Speed, V

kph

Exposure Category

Material

Sign Height, s

Sign Width, B

Epsilon, ε

Solidity ratio (0–1)

Damping Ratio, β

0.010 steel / 0.015 concrete

Topographic Factor, K_zt

Directionality Factor, K_d

Pylon Sections

Section	Width (mm)	Height (m)

Heights must be ascending. Last row height = pylon height (h).

Getting Started

Enter the design parameters on the left and click Compute Wind Load to run the analysis.

This calculator follows NSCP 2015 Section 207F and ASCE 7-16 Chapter 29 for computing design wind forces on solid freestanding pylon signs. The calculation includes:

Natural frequency classification (rigid / flexible)
Velocity pressure \( q_z \) profile
Gust effect factor \( G \) (rigid or flexible formulation)
Force coefficient \( C_f \) via bilinear interpolation
Design wind force for Case A (uniform) and Case B (eccentric)