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10
ORIGIN SY-05
INFO OCT-01 AF-08 ISO-00 FBO-02 /016 R
DRAFTED BY A/SY/FO:MEMULVEY:HH
APPROVED BY A/SY/FO - RALPH F.EARL
AF/EX - JBRYANT
--------------------- 088319
R 310116Z JUL 76
FM SECSTATE WASHDC
TO AMEMBASSY BANGUI
INFO AMEMBASSY KHARTOUM
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E.O. 11652: N/A
TAGS: ABLD, ASEC
SUBJECT: PROPOSED PERIMETER WALL
REF: BANGUI 1340
1. PARAGRAPH 3G OF REFTEL RECOMMENDS CONSTRUCTION OF
PERIMETER WALL ONLY FIVE FEET IN HEIGHT.
2. IN EVALUATING THE RESPECTIVE MERITS OF IRON GRILL FENC-
ING, WALLS, CHAIN LINK FENCING OR OTHER TYPES OF EXTERNAL
PERIMETER BARRIERS, PREFERENCE SHOULD BE GIVEN TO THE
BETTER VISIBILITY AFFORDED BY THE "OPEN VIEW" BARRIER. THE
PREFERRED IRON GRILL OR SIMILAR TYPE FENCING WOULD ASSIST
GUARDS OR OTHER CUSTODIAL PERSONNEL IN THE EARLIER DETECTI-
ON OF WOULD-BE INTRUDERS; WHEREAS THE "CLOSED VIEW" TYPE OF
BARRIER (E.G. SOLID WALL) AFFORDS A DEGREE OF COVER TO THE
WOULD-BE INTRUDER. THE FOLLOWING REQUIREMENTS SHOULD BE
SATISFIED IN THE DESIGN AND INSTALLATION OF FENCING.
(A) PROTECTIVE FENCING SHOULD BE AT LEAST 9 FEET HIGH,
SUBSTANTIAL IN DESIGN AND TOPPED WITH A DETERRENT TO
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SCALING.
(B) IF IRON GRILL FENCING IS TO BE USED, VERTICAL BARS
SHOULD BE A MINIMUM OF 5/8 INCH IN DIAMETER, SPACED
FIVE INCHES ON CENTER. BARS (OTHER THAN THE
ANCHORING SUPPORTS) SHOULD EXTEND TO WITHIN TWO
INCHES OR LESS OF THE BASE.
(C) FENCE SUPPORTS SHOULD BE FIRMLY ANCHORED IN CONCRETE.
DEPENDING ON SOIL CONSISTENCY, IT MIGHT BE ADVISABLE
OR NECESSARY TO PROVIDE A CONCRETE CURB UNDER THE
ENTIRE PERIMETER.
(D) PEDESTRIAN AND VEHICULAR ENTRANCES THROUGH THE
BARRIERS SHOULD BE PROTECTED BY HEAVY IRON GRILLS
OR SOLID METAL GATES WHICH ARE AT LEAST EQUIVALENT
TO THE PROTECTION AFFORDED BY THE REMAINDER OF THE
PERIMETER. HEAVY LOCKING DEVICES OF AMERICAN MANU-
FACTURE SHOULD BE INSTALLED ON LARGE ENTRANCES
HAVING DOUBLE GATES. THE LOCKING DEVICES SHOULD BE
SUPPLEMENTED BY LATERAL BOLTS TO JOIN THE GATES AND BY
ONE OR MORE VERTICAL BOLTS WHICH ANCHOR INTO THE BASE.
(E) MISCELLANEOUS OPENINGS IN THE PERIMETER BARRIER,
SUCH AS CULVERTS, DRAINAGE DITCHES, ETC., REQUIRE
PROTECTION IF THE OPENING HAS AN AREA OF 90
SQUARE INCHES AND ONE DIMENSION MORE THAN 5 INCHES.
PROTECTION PROVIDED SHOULD BE EQUIVALENT TO THAT
AFFORDED BY THE REMAINDER OF THE PERIMETER.
(F) TO THE EXTENT THAT TERRAIN FEATURES, PLOT PLANNING
AND BUILDING LAYOUT PERMIT, FENCING SHOULD BE AS
STRAIGHT AS PRACTICABLE AND SHOULD BE NOT MORE
THAN 300 OR LESS THAN 50 FEET FROM THE BUILDING,
OBJECT OR LOCATION REQUIRING THIS PROTECTION. AN
EXCEPTION TO THE 300 FOOT MAXIMUM IS THE COMPOUND
HAVING STRUCTURES ON IT OTHER THAN THE OFFICE
BUILDING. GENERALLY, HOWEVER, THE SMALLER THE
FENCED AREA THE MORE EFFECTIVELY IT CAN BE OBSERVED
BY GUARDS OR CUSTODIAL PERSONNEL.
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(G) THERE SHOULD BE AT LEAST 20 FEET CLEARANCE BETWEEN
THE PERIMETER BARRIER AND STRUCTURES OR NATURAL
TERRAIN FEATURES, OUTSIDE OF THIS PERIMETER,
WHICH-WOULD OFFER A SIMPLE MEANS OF PENETRATION.
TO THE MAXIMUM EXTENT FEASIBLE, A GUARD WITHIN
THE PROTECTED BUILDING SHOULD HAVE A CLEAR VIEW
OF THE BARRIER.
(H) CARE SHOULD BE TAKEN IN THE DESIGN OF FENCING TO EX-
CLUDE BUILT-IN FOOT HOLDS WHICH COULD BE USED TO
SCALE THE BARRIER.
3. IN SOME INSTANCES, CHAIN LINK OR CYCLONE TYPE FENCING
MIGHT BE CONSIDERED, IF A BARRIER IS NEEDED AND THE IRON
GRILL DESIGN CANNOT BE PROVIDED. HOWEVER, THIS IS NOT
THE PREFERRED TYPE, NEITHER FROM THE STANDPOINT OF SECURITY,
NOR FROM THE ESTHETIC VIEWPOINT. IF USED, FENCING
MATERIAL SHOULD BE (1) NOT LARGER THAN 2 INCH SQUARE
MESH, AND (2) OF NO. 9 GAUGE OR HEAVIER WIRE (AMERICAN
WIRE GAUGE) WITH TWISTED AND BARBED SELVAGE AT TOP AND
BOTTOM. OTHER STANDARDS SET FORTH ABOVE, WITH RESPECT
TO HEIGHT, ANCHORING AND OPENINGS, SHOULD BE OBSERVED IN
THE CONSTRUCTION. PARTICULAR ATTENTION SHOULD BE GIVEN
TO PROVIDING SUFFICIENT SUPPORTS TO ENSURE COMPLETE
RIGIDITY BETWEEN UPRIGHTS.
4. AF/EX AND SY ANXIOUS TO BE RESPONSIVE TO YOUR NEEDS.
IF THERE ARE OVERRIDING FACTORS WHICH WOULD PRECLUDE
CONSTRUCTION OF A SECURITY APPROVED WALL MEETING ABOVE
SPECIFICATIONS, PLEASE ADVISE. KISSINGER
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