TM 5-811-3/AFM 88-9, Chap. 3
CHAPTER 1
GENERAL
b. Environmental considerations. Design consid-
1-1. Purpose. Information and criteria in this man-
ual will guide engineering design personnel in deter-
eration will be given to overall appearance so as to
mining the adequacy of lightning and static electric-
maintain an attractive facility in harmony with area
ity protection systems for all types of facilities.
surroundings.
c. System components. Components will conform
Policy and procedure of design development and
tests are also included. Referenced criteria, codes,
to applicable NFPA codes, except as otherwise
stated or indicated.
and standards are intended to include provisions for
d. Penetration of building exterior surfaces.
normal type facilities, which when integrated with
Where roofing, walls, floor and waterproofing mem-
criteria included herein, establish complete provi-
branes are penetrated by components of these sys-
sions for these protection systems. The standards
and methods of system protection discussed are in-
tems, adequate waterproofing and caulking of such
penetrations will be provided. However such pene-
tended as the most practical and economical means of
accomplishing protection of real property and avoid-
trations will be avoided whenever possible.
ance of casualties to personnel. These criteria will not
provide suitable protection for construction contrac-
1-5. Applicable codes and standards. Codes
tors' personnel.
and standards referenced in this manual and listed in
Appendix A are to be considered as an integral part
1-2. Scope
of this manual,
a. General. The scope of this manual will include
adequacy of engineering design for facilities of Army,
1-6. Design development
Air Force and other agencies in conformance with
paragraph 1-3.
drawings comprise more than one sheet showing
b. Limitations. Limitations within continental
composite roof and architectural elevation, a separate
United States will be subject only to specific provi-
`
sheet will be provided showing locations of air termi-
sions of project design directives, deviations included
nals, routing of roof conductors, down conductors,
herein or authorized by HQDA (DAEN-ECE-E)
and grounding system pattern.
WASH DC 20314-1000, for Army projects, and
b. Static electricity protection system. Where
HQUSAF/LEEE WASH DC 20332, for Air Force
static electricity protection for two or more rooms or
Projects.
areas is indicated on an architectural floor plan and
c. Other protection systems. These criteria are not
cannot be shown on an appropriate electrical plan, a
intended to support or implement separate criteria
separate floor plan sheet showing the complete static
such as furnished for electromagnetic protection or
electricity protection system pattern will be included
electromagnetic shielding requirements.
in the project design.
1-3. Application. Except as included for facilities
1-7. Approved type systems
of the Army Materiel Development and Readiness
Command, criteria contained in this manual will ap-
a. Lightning protection. Selection of the type of
ply to new construction of permanent, fixed type fa-
protective system will be as prescribed in this man-
cilities conforming to AR 415-15 within the continen-
ual, NFPA No. 78, and MILHDBR-419.
tal United States. Where conflicts arise with criteria
b. Static electricity protection. Selection of system
or design guidance of different Army or Air Force
t y p e will be prescribed in NFPA No. 77,
agencies, or with Federal organizations other than
MIL-HDBR 419, and MIL-STD-188-124.
Army or Air Force, the most stringent guidance will
1-8. Materials. Materials will conform to applicable
govern. Criteria or design guidance will apply to
NFPA codes, unless otherwise stated. Normally,
overseas facilities in conformance with AR 415-36.
copper materials will be specified for use below fin-
1-4. General
ished grade. Stainless steel grounding devices should
be used when there is a potential of galvanic corro-
a. Separate section of a specification. Inasmuch as
sion of nearby steelpipes. UL listed compression-
provisions for lightning protection involve a special
type connectors may be used where such connectors
type (steeple jack) trade, contract requirements for
are equivalent to the welded type. Special considera-
lightning and static electricity protection will be in-
tion will be given to selection of materials to compen-
cluded as a separate section in project specifications.
1-1
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