MIL-DTL-549L
*2.4 Order of precedence. In the event of a conflict between the text of this specification and
the references cited herein, the text of this specification takes precedence. Nothing in this specification,
however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
*3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection (see 4.2 and 6.4).
3.2 Materials and components. The materials (see 6.5) and components shall be as specified
on the applicable drawings and as specified herein.
3.2.1 Wood. The wood used for the poles shall be uniformly dried, without brashness,
honeycombing or case hardening. At the time of fabrication, the wood shall have a moisture content of
not less than 8% or more than 12% when tested as specified in 4.4.1.1. The wood shall be any of the
following species:
Soft woods
Hard woods
Cedar, Alaska Yellow
Ash, White
Cedar, Port Oxford
Beech
Cypress
Birch
Douglas-Fir
Elm, Rock
Hemlock, West Coast
Hickory
Larch, Western
Maple, Sugar or Black
Pine, Red (Norway)
(Hard)
Pine, Southern Yellow
Oak
Redwood
Pecan
Spruce, Sitka or Eastern
Kerruig/Apitong
Phillippine Hardwood
Kapur Malaysian Hardwood
Soft wood shall have not less than four annual rings per inch, measured radially at either end of
the pole. When tested as specified in 4.4.1.1, hard wood, excluding ash, shall weigh not less than 32
lbs/ft3 at a moisture content of 12%. Ash shall weigh not less than 38 lbs/ft3 at a moisture content of
12%.
3.2.2 Steel tube. Steel tube shall conform to killed or semikilled, seamless or electric resistance
welded, numbers MT1020, condition HR or CD of ASTM-A-513 or ASTM-A-519.
*3.2.3 Steel sheet and strip. Steel sheet and strip shall be cold rolled commercial quality,
conforming to ASTM A 1008, hot rolled of ASTM A 1011 or numbers 1025-1030 of
SAE-AMS-QQ-S-700.
3.2.4 Steel bar. Steel bar shall conform to grades M-1015 through M-1031 of ASTM A 575
or grades 1015 through 1035 of ASTM A 108.
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