How to Determine Acceptable Wind Loading

How to Determine Acceptable Wind Loading
1. Find the maximum wind velocity in your local
area indicated on the wind velocity map.
Check local code. Some areas of the country
may require design to higher wind loading
than shown here. If unsure of exact location in
relation to wind region, assume the higher
value.
3. Select the preferred luminaire from our catalog.
The EPA of each luminaire is featured throughout
our printed material and website.
2. Select the style and height of the preferred
pole. See Dynamic Lighting Pole EPA Table
located in the back of our
catalog(example below) for poles suitable
for the wind velocity in your area.
4. Calculate values as shown below.
The Maximum allowable EPA rating for the
pole must be greater than the EPA rating of
the luminaire(s) and bracket combined.
Maximum allowable EPA in ft2 at:
120 MPH
Diameter
of Shaft
at Base
(inches)
Diameter
of Shaft
Top
(inches)
Shaft Wall
Thickness
(inches)
10.83
7.33
4
4
0.125
10.61
8.4
5.53
4
4
0.125
8.45
6.58
4.14
4
4
0.125
Model Number
Pole
Height
70 MPH
80 MPH
90 MPH
100 MPH
D23-08
7'8"
22.75
17.27
13.52
D23-10
9'8"
18.19
13.69
D23-12
11'8"
14.87
11.06
Example:
Location: Little Rock, Arkansas
Wind Rating (from table): 70 MPH
Pole: D23-12
Fixture: D480
Max allowable
EPA for Pole
D23-12
Subtract the total EPA value of all fixtures
and brackets from the maximum
allowable EPA value of the pole.
The result must be positive to be an
acceptable combination.
Positive result
This formula is for fixtures and
brackets only. Accessories can
greatly affect windload. Please
contact factory for information.
14.78 - 2.29 = 12.49
D480
Fixture EPA
5220 Shank Road
Pearland, Texas 77581
www.dynamiclighting.com
800.364.0098
Fax: 281.997.5441
National Wind Velocity Map
Seatle
80
Caribou
Havre
Spokane
MIssoula
International Falls
Great Falls
Portland
Bismarck
Roseburg
Billings
Boise
Portland
Minneapolis/
St. Paul
Green Bay
Lander
Reno
San Francisco
Cheyenne
Salt Lake City
Tonopah
Milford
Fresno
Lansing Detroit
Chicago
New York
Harrisburg
Philadelphia
Pittsburgh
70 MPH
Washington D.C.
80 MPH
Columbus
Springfield Indianapolis
Charleston
Kansas City
Lexington
St. Louis
Grand Junction
Richmond
Norfolk
Dodge City
Las Vegas
Nashville
Los Angeles
San Diego
Des Moines
Lincoln
Denver
Albuquerque
Oklahoma City
Memphis
Little Rock
Phoenix
Yuma
Hatteras
100 MPH
110 MPH
Wilmington
Columba
Atlanta
Special Wind Region
(Per ASCE)
Charleston
Jackson
Pensacola
Barrow
Houston
Jacksonville
130 MPH
New Orleans
Tampa
San Antonio
Hawaii
80 MPH
Puerto Rico 95 MPH
Fairbanks
110 MPH 100 MPH
120 MPH
Mariana
Pensacola
Nome
Anchorage
90 MPH
Shreveport
Abilene
Alaska
Ralegh
Knoxville
Birmingham
Fort Worth
El Paso
Boston
Hartford
Buffalo
Dubuque
Sacramento
Albany
Huron
Pocatello
Eureka
Sault Sainte Marie
Duluth
Fargo
Miami
Brownsville
Juneau
Jacksonville
Gainesville
140 MPH 150 MPH 130 MPH
Ocala
130 MPH
Leesburg
140 MPH
Tampa
150 MPH
Florida
Kodiak
To calculate acceptable windloading, see reverse side.
Latest available information
at time of printing.
Check local codes.
Ft. Myers
Miami
150 MPH
5220 Shank Road
Pearland, Texas 77581
www.amerluxexterior.com
800.364.0098
Fax: 281.997.5441

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