Foundation Notes
12
Installation Procedures
1.
Remove all burrs and sharp edges.
2.
Dimensions apply before plating.
3.
Interpret drawing per ANSI Y14.5M-1982.
4.
Dimensions are shown in feet and inches. Dimensions in brackets [ ] are in millimeters.
5.
A tolerance of ±1/8" [3] applies to all anchor bolt layout dimensions.
6. Foundation Notes:
A)
This foundation is a typical design only. Certification of it's suitability for a particular installa-
tion by a professional engineer is required prior to it's use for actual fabrication.
B)
Contractor shall field verify all dimensions locating existing construction before fabrication of new
construction begins.
C)
Concrete and related work shall be mixed, placed and cured in accordance with "Building
Code Requirements for Reinforced Concrete" ACI 318-89 (Rev. 88) and "Specifications for
Structural Concrete" ACI 301-84 (Rev. 88) publication SP-15 (88).
D)
Concrete for foundations shall develop a compressive strength of at least 3000 psi [211
kgf/cm2] in 28 days with a maximum slump of 3" [76] at time of placing.
E)
Reinforcing bars shall conform to ASTM A 615 [S1] grade 60 deformed type Fy = 60000 psi
[4219 kgf/cm2].
F)
Unless otherwise noted, concrete cover of reinforcing bars shall conform to minimum requirements of
ACI 318-89 (Rev. 88).
G)
Fabrication of reinforcing steel shall be in accordance with "Manual of Standard Practice for
Detailing Reinforcing ConcreteStructures" ACI 315-80 (Rev. 86).
H)
Provide 3/4" x 45° [19 x 45°] chamfer on all exposed concrete edges.
J)
Foundations have been designed to rest on undisturbed soil (per EIA-411-A and RS-222-D)
with a minimum allowable net vertical bearing capacity of 2000 psf [9770 kgf/m2]. If undesirable
soil conditions are encountered, the engineer shall be notified.
K)
Backfills shall be suitable excavated material or other suitable material compacted in 6" lifts
to 90% of maximum density as determined by ASTM D1557.
L)
If this foundation is to be located in an area where annual frost penetration depth exceeds
15" [381], the local building code specifying a minimum required foundation depth should be con-
sulted.
7. Grounding Electrode System Notes:
The grounding system shown represents the minimum requirements to achieve satisfactory
grounding. Actual site conditions and soil resistivity levels will determine final grounding system
design to comply with the following:
A)
All ground ring, ground rod and antenna structure connections to be EIRCO® products, Inc.
Calweld® exothermic type welded electrical connections or equivalent.
B)
Ground rods shall be driven to a depth below permanent moisture level (minimum depth
shown) as dictated by geographical location.
C)
The antenna structure shall be connected to a grounding electrode system consisting of a
number of interconnected ground rods. The system shall meet the requirements of the
Underwriters' Laboratories Publication No. ,UL96A for Lightning protection.
D)
The grounding electrode system to earth resistance shall not exceed 10 Ohms, measured
with a Biddle 3 terminal device or equivalent. The grounded conductor (neutral) supplied to all ac
equipment on the antenna structure should be disconnected before taking measurement.
E)
Actual site conditions may require longer ground rods, additional ground rods and/or land fill
additives to reduce soil resistivity levels.
F)
Avoid sharp bends when routing grounding wire. Grounding wires to antenna structure to be
run as short and straight as possible.
G)
Final grade directly above grounding electrode system to be water permeable.
8. Power/IFL Conduit Notes:
A)
Electrical power - Drawing depicts suggested location for electrical power conduit to anten-
na. Size, type and depth to bury conduit to be determined by customer in compliance with local
codes. Direction to route conduit to be determined by the relative location of communcations
building/shelter. Power conduit to extend 6" (minimum) above surface of foundation slab. Open
ends of conduit to be sealed to prevent moisture and foreign particle contamination.
Customer to provide main load center assembly and over-current protection devices for electri-
cal equipment. Mounting location of load center to be determined by customer in accordance with
local codes.
B)
For routing IFL cables, 4” size conduit recommended. Type and depth to bury conduit to be
determined by customer, in compliance with local codes. Location of conduit on foundation and
direction to route conduit to be determined by location of communications building/shelter. Conduit
to extend 36” (minimum) above surface of foundation slab. All bends to be large radius, maximum
of two bends per run. Open ends of conduit to be sealed to prevent moisture and/or foreign parti-
cle contamination.
