Flagpole Purchasing Considerations Flagpoles Prices US Flags Technical Flagpole Information Flagpole Windspeeds Email Questions
 

Discount-Flag-Poles.com follows engineering manufacturer wind speed specifications for the aluminum flagpole shafts. These speeds are based on wind tests and are the guidelines the manufacturers use when rating flagpole strength. Please consider this chart when planning for your new flagpole and flag size. Example: 30 ft commercial flagpoles, with a 4" base diameter can safely fly up to a 6 x 10 ft flag during 50mph wind gusts

Windspeed Chart:

Exposed
Height

Base Diameter
Wall
Thickness
Maximum Unflagged
Windspeed (MPH)
Maximum
Flag Size
Flagged Windspeed at Maximum Flag Size
15'
3"
.125"
170
3' x 5'
120+
20'
3"
.125"
123
5' x 8'
85
20'
4"
.125"
163
5' x 8'
110
20'
5"
.125"
265
5' x 8'
120+
20'
5"
.188"
316
5' x 8'
120+
25'
3"
.125"
94
5' x 8'
50
25'
4"
.125"
120
5' x 8'
70
25'
5"
.125"
154
5' x 8'
105
25'
5"
.156"
201
5' x 8'
120
25'
5-1/2"
.188"
256
5' x 8'
120+
25'
6"
.156"
195
5' x 8'
120+
25'
6"
.188"
222
5' x 8'
120+
30'
4"
.125"
97
6' x 10'
50
30'
5"
.125"
110
6' x 10'
85
30'
5"
.156"
126
6' x 10'
95
30'
6"
.156"
195
6' x 10'
120
30'
6"
.188"
222
6' x 10'
120+
35'
5"
.125"
90
6' x 10'
75
35'
5"
.156"
100
6' x 10'
80
35'
6"
.156"
129
6' x 10'
95
35'
7"
.156"
184
6' x 10'
120
35'
7"
.188"
209
6' x 10'
120+
40'
7"
.156"
138
8' x 12'
95
40'
8"
.188"
203
8' x 12'
120+
45'
8"
.188"
166
8' x 12'
110
50'
8"
.188"
127
10' x 15'
95
50'
10"
.188"
185
10' x 15'
115
60'
10"
.188"
136
12' x 18'
95
60'
10"
.250"
167
12' x 18'
110
60'
12"
.250"
213
12' x 18'
120+
70'
10"
.312"
145
15' x 25'
95
70'
12"
.250"
169
15' x 25'
115
80'
12"
.375"
174
20' x 30'
115
Phone 574-261-7500
Fax 574-674-5134