60040299.pdf
PDF 205 KB Posted
- Attached to
- BEQ Repair AS4212
- Solicitation number
- N4008525R2620
About this file
This document is an engineering drawing (E-111) for lightning protection system design for a Barracks Equipment Quarters (BEQ) repair project at Marine Corps Base Camp Lejeune. The roof plan drawing provides detailed specifications for lightning protection installation, including requirements for air terminals, conductors, and grounding components. Key technical specifications include:
Specific installation requirements mandate Class I air terminals (12 inches in height), using either copper or aluminum materials with 3/8 or 1/2 inch diameter. Conductors must be #17 AWG 29-strand copper or #14 AWG 14-strand aluminum, with copper preferred. The design requires down lead conductors connected to a ground loop, protected by PVC Schedule 40 conduit, and attached to a 3/4 inch by 10-foot copperclad ground rod. The lightning protection system must conform to NFPA 780 and UL 96A standards, with components requiring UL listing and Cal-OSHA approval. Conductors must be fastened at intervals not exceeding 36 inches on center, using matching metal roof fasteners compatible with the conductor material.
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Text version
1 2
1 1 1
3 4
2'-0"
M
IN
1'
-0
MIN.
'-0
M
IN
GRADE
GROUND ROD
CONDUCTOR
DOWN
GROUND
ROD
CLAMP
AIR TERMINAL DETAIL
NTS
NOTES:
AIR TERMINAL SPACING SHALL CONFORM TO NFPA 780 & UL 96A REQUIREMENTS.
MATERIAL COMPATIBILITY SHALL CONFORM TO NFPA 780 & 96A REQUIREMENTS.
MATERIAL CLASS SHALL CONFORM TO NFPA 780 & UL 96A REQUIREMENTS.
AIR TERMINALS SHALL BE UL LISTED & CAL-OSHA APPROVED.
LIGHTNING PROTECTION
CONDUCTORS:
FASTEN COPPER CONDUCTORS WITH COPPER STANDING SEAM
METAL ROOF FASTENER. FASTEN ALUMINUM CONDUCTORS WITH
ALUMINUM STANDING SEAM METAL ROOF FASTENER. LIGHTNING
PROTECTION CONDUCTORS SHALL BE FASTENED AT INTERVALS
NOT MORE THAN 36" ON CENTER.
EXTRUDED COPPER STANDING SEAM METAL
ROOF AIR TERMINAL BASE. FOR SURFACES NOT
COMPATIBLE WITH COPPER USE EXTRUDED
ALUMINUM STANDING SEAM METAL ROOF AIR
TERMINAL BASE.
AIR
TERMINAL
GROUNDING DETAILTHRU WALL ASSEMBLY DETAIL
THRU ROOF
CONDUCTOR
LIGHTNING
CONDUCTOR
LIGHTNING
CONDUCTOR
NTS NTSLRODTWL1 BLDGSG
A B
C D
E
SYM. DESCRIPTION DATE APP.
REVISIONS
DR.
DES.
CHK.
SUBMITTED BY:
DESIGN DIR.
APPROVED: PWO OR OICC
SATISFACTORY TO:
DATE
DATE
DEPARTMENT OF THE NAVY NAVAL FACILITIES ENGINEERING SYSTEMS COMMAND
CAMP LEJEUNE, NORTH CAROLINA
MARINE CORPS BASE
SIZE CODE IDENT. NO. NAVFAC DRAWING NO.
E1 80091 CONSTR. CONTR. NO.
AS NOTEDSCALE SHEETSPEC.
2 3 4 5 6
A B
C D
E
1 2 3 4 5 6
E-111
Approver
J. REED
REPAIR BEQ AS4212
ROOF PLAN - LIGHTNING PROTECTION
60040299 N40085-23-B-0035
3/32" = 1'-0"
B1 ROOF PLAN - LIGHTNING PROTECTION
PLAN NOTES
1 DOWN LEAD CONDUCTOR CONNECTED TO GROUND LOOP. PROVIDE PVC
SCHEDULE 40 TO PROTECT CONDUCTOR FROM PHYSICAL DAMAGE.
CONNECT DOWN LEAD CONDUCTOR TO #1/0 AWG COPPER GROUND LOOP
AND USE 3/4 INCH BY 10 FOOT COPPERCLAD GROUND ROD BY EXOTHERMIC
CONNECTION. SEE GROUNDING DETAIL. TYPICAL.
2 PROVIDE TEST WELL AT DOWNLEAD GROUND ROD LOCATION FOR FUTURE
TESTING AND MAINTENANCE AS REQUIRED.
3 CLASS I AIR TERMINAL, 12 INCHES IN HEIGHT/LENGTH. USE 3/8 INCH
DIAMETER FOR COPPER OR 1/2 INCH DIAMETER FOR ALUMINUM. AIR
TERMINAL MATERIAL MUST MATCH AND BE COMPATIBLE WITH MATERIAL
USED FOR CONDUCTORS. TYPICAL.
4 CLASS I CONDUCTORS MUST BE #17 AWG, 29 STRAND COPPER OR #14 AWG,
14 STRAND ALUMINUM. TYPICAL. COPPER MUST BE USED WHENEVER
POSSIBLE.
GRAPHIC SCALE: 3/32"=1'-0"
8' 0 8' 16' 24'
N
KELLY ROOT
FINAL
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