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General Notes

  1. All dimensions are shown in feet and inches (and millimeters).
  2. Contractor shall field verify all dimensions locating existing
    construction before fabrication of new construction begins.
  3. Concrete and related work shall be mixed, placed and
    cured in accordance with the "Building Code Requirements
    for Reinforced Concrete" ACI 318-86 (Rev 88) and "Specifications
    for Structural Concrete" ACI 301-84 (Rev 88) publication
    SP-15 (88).
  4. Concrete for foundations shall develop a minimum compressive
    strength of 3000 psi (211 kgf/cm2) in 28 days with a
    maximum slump of 3 inches (76 mm) at time of placing.
  5. Reinforcing bars shall conform to ASTM A615 (S1) grade 60
    deformed type Fy = 60,000 psi (4,219 kgf/cm2).
  6. Unless otherwise noted, concrete cover for reinforcing bars
    shall conform to the minimum requirements of ACI 318-89
    (Rev 88).
  7. Fabrication of reinforcing steel shall be in accordance with
    the "Manual of Standard Practice for Detailing Reinforced
    Concrete Structures" ACI 315-80 (Rev 86).
  8. Provide 3/4" x 45" (19 mm x 45") chamfer on all exposed
    concrete edges.
  9. 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 psi (9770 kgf/m2.
    If undesirable soil conditions are encountered, the Engineer shall
    be notified.
  10. Backfills shall be suitable excavated material or other suitable
    material compacted in 6" lifts to 90% of maximum density
    as determined by ASTM D1557.
    Volume of Concrete 12.1 Cubic Yards
    (9.25 Cubic Metres)

    Weight of Reinforcing .654 Tons
    (593 Kilograms)
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  1. Ground rods shall be driven to depths as shown (below
    permanent moisture level) and ground system resistance
    measured. The antenna system consisting of a number of
    interconnected ground rods. The system shall meet the
    standards of the Underwriters' Laboratories Publication
    No. UL96A for lightning protection. The ground rod
    system-to-earth resistance shall not exceed 1.0 Ohm at
    any time during the year.
  2. Grounding system shown is the minimum necessary. Local
    conditions will dictate grounding system design.
  3. This foundation is a typical design only. Certification of its
    suitability for a particular installation by a Professional
    Engineer is required prior to its use for Actual Fabrication.
  4. If this foundation is to be located in an area where the
    annual frost penetration depth exceeds 15" (381 mm), the local
    building code specifying a minimum required foundation
    depth should be consulted.
  5. A Tolerance of ±1/8" (3 mm) applies to all anchor bolt layout
    dimensions.
  6. Level all shear caps individually and to within ±1/4" (6 mm)
    of each other.
  7. For electrical power to antenna, 1-1/2" to 2-1/2" size conduit
    recommended. Type and depth to bury conduit to be determined
    by customer, in compliance with local codes. Direction
    to route conduit to be determined by location of
    communications building/shelter. Conduit to extend 6"
    (minimum) above surface of foundation slab. Open ends of conduit
    to be sealed to prevent moisture and foreign particle
    contamination.
  8. IFL conduit required if no other means for routine cables are
    provided.
  9. 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
    by 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 foreign
    particle contamination.
    Foundation Layout - Slab
    5.6-Metre Earth Station Antenna
    Figure 3