MIL-HDBK-1034

Section 6: FLAGSTAFFS

Definitive Design. Flagstaffs shall be constructed of seamless

6.1

6063-T6 aluminum tubing, stainless steel or steel with diameters, wall

thicknesses and tapered lengths consistant with recommended industry

standards. (Refer to Paragraph 6.3 and Figure 10.)

Wind Loads. When designing for wind loads, determine wind pressures

6.2

on flagstaffs by either of the following equations:

P = 0.00307 ChV2

EQUATION:

(1-1)

where:

P = pressure on projected area (psf)

Ch = height corrected coefficient = (h/30)2/7

h = height above ground (ft)

(No corrections below 30 ft.)

V = wind velocity (mph)

(0.00307 is coefficient including flat plate

resistance and dimensional factors.)

P m = 0.00579 ChmVm2

EQUATION:

(1-2)

where:

P m = pressure on projected area (KSM - kilograms/

square meter)

V m = wind velocity (KPH - kilometers per hour/7

2

C hm = height correction coefficient-(h/9.14)

h m = height above ground (m-meters)

(No corrections below 9.14 meters)

6.3.

Types.

6.3.1

Ground-Set.

Use the following criteria to establish desirable

Relationship to Nearest Building. Use poles 50 percent higher than

6.3.1.1

the building for one-story buildings and 25-percent higher than the building

for two-story buildings.

Height Versus Ball Diameter.

6.3.1.2

Use the following dimensions:

HEIGHT

BALL DIAMETER

(ft.)

(in.)

up to 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

40 to 50 ............................................................ 8

60 to 70 ........................................................... 10

Vertical Wall-Set. The distance between wall brackets shall be a

6.3.2

minimum of 10 percent of overall pole length. Poles 30 feet in length or

less need two brackets. Use three brackets for poles over 30 feet in length.

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