City & County of San Francisco
CONTRACT No. 8671C
SECTION 34 43 19
ELECTRICAL MANHOLES AND JUNCTION STRUCTURES
(Pre-Procurement)
PART 1 - GENERAL
1.01
SUMMARY
The Work under this Section shall consist of furnishing Manholes, Handholes and Junction
structures as shown on the Plans, as specified herein.
1.02
REFERENCES
A. FAA Specification Item L-115, Electrical Manholes and Junction Structures, and as modified
herein.
B. Section 34 43 33, Airfield Lighting Test.
1.03
SUBMITTALS
Prior to commencing the Work in this Section, the Contractor shall submit product data and shop
drawing information for the following items:
A. Precast and Cast in Place Manholes.
B. Precast and Cast in Place Handholes.
C. Precast and Cast in Place Pull Boxes.
D. L-867 Base Cans.
E. L-868 Base Cans.
F. Sectional Pull boxes
G. Grounding
1.04
QUALITY CONTROL
The Contractor shall perform Quality Control testing to meet the requirement of FAA
Specification Item L-115, and as modified herein.
PART 2 - PRODUCTS
2.01
ELECTRICAL MANHOLES, HANDHOLES AND JUNCTION STRUCTURES
A. Electrical manholes, handholes and junction structures shall conform to FAA Specification
Item L-115, and as modified herein.
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Electrical Manholes
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City & County of San Francisco
CONTRACT No. 8671C
PART 3 - EXECUTION
A. The Contractor shall install or furnish electrical manholes, handholes and junction structures
in accordance with FAA Specification Item L-115, and as modified herein.
PART 4 - INCLUDED FAA SPECIFICATIONS
A. Item L-115, Electrical Manholes and Junction Structures.
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CONTRACT No. 8671C
EQUIPMENT AND MATERIALS
115-2.1
GENERAL.
a. All equipment and materials covered by referenced specifications shall be subject to
acceptance through manufacturer’s certification of compliance with the applicable specification when so
requested by the Engineer.
b. Manufacturer’s certifications shall not relieve the Contractor of the Contractor’s
responsibility to provide materials in accordance with these specifications and acceptable to the Engineer.
Materials supplied and/or installed that do not materially comply with these specifications shall be
removed, when directed by the Engineer and replaced with materials, which do comply with these
specifications, at the sole cost of the Contractor.
c. All materials and equipment used to construct this item shall be submitted to the Engineer
for approval prior to ordering the equipment. Submittals consisting of marked catalog sheets, shop
drawings and manufacturer’s installation instructions, shall be provided. Manufacturer’s installation
instructions shall indicate special procedures and installations. Submittal data shall be presented in a
clear, precise and thorough manner. Original catalog sheets are preferred. Photocopies are acceptable
provided they are as good a quality as the original. Clearly and boldly mark each copy to identify
pertinent products or models applicable to this project. Indicate all optional equipment and delete nonpertinent data. Submittals for components of electrical equipment and systems shall identify the
equipment for which they apply on each submittal sheet. Markings shall be boldly and clearly made with
arrows or circles (highlighting is not acceptable). Contractor is solely responsible for delays in project
accruing directly or indirectly from late submissions or resubmissions of submittals.
d. The data submitted shall be sufficient, in the opinion of the Engineer, to determine
compliance with the plans and specifications. The Contractor’s submittals shall be neatly bound in a
properly sized 3-ring binder, tabbed by specification section. The Engineer reserves the right to reject any
and all equipment, materials or procedures, which, in the Engineer’s opinion, does not meet the system
design and the standards and codes, specified herein.
e. All equipment and materials furnished under this section shall be guaranteed against
defects in materials and workmanship for a period of at least twelve (12) months from final acceptance by
the Owner. The defective materials and/or equipment shall be repaired or replaced, at the Owner’s
discretion, with no additional cost to the Owner.
115-2.2 CONCRETE STRUCTURES. Cast-in-place concrete structures shall conform to the details
and dimensions shown on the plans or contract documents.
Provide precast concrete structures where shown on the plans. Precast concrete structures shall be an
approved standard design of the manufacturer. Precast units shall have mortar or Bitumastic sealer placed
between all joints to make them watertight. The structure shall be designed as full traffic loading HS-20 in
accordance with ASTM C857, ACI318 and AASHTO, unless otherwise shown on the plans. Openings or
knockouts shall be provided in the structure as detailed on the plans.
Threaded inserts and pulling eyes shall be cast in as shown.
The structural design shall be signed and sealed shop drawings, design calculations, and other information
submitted by the Contractor to allow for a full evaluation by the Contract Manager.
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CONTRACT No. 8671C
115-2.3 JUNCTION CANS. Junction Cans shall be L-867 Class 1 (non-load bearing) or L-868 Class
1 (load bearing) by 9” deep. The cans shall have a galvanized steel cover, gasket, and stainless steel
hardware. Covers shall be ⅜ inch thickness for L-867 and ¾ inch thickness for L-868.
a. Extensions shall comply with the provision of FAA Advisory Circulars AC150/5345-42
(current edition) for 12 inch, 15 inch or 16 inch nominal diameter housing. Contractor shall measure the
required length of extension between the existing grade and the proposed new grade. The extensions
shall be ordered from the authorized manufacturer. Field fabrication shall not be allowed.
b. Material for bolts and washers shall be (18-8) stainless steel.
115-2.3.1 TRANSFORMER HOUSING.
a. Transformer housings shall meet the requirements of FAA Advisory Circular AC
150/5345-42(current edition), Specifications for Airport Light Base and Transformer Housings, Junction
Boxes, and Accessories and shall be Class I-Steel Bases, galvanized steel cover, gasket, and stainless steel
hardware.
b. The following items shall be 24 inch deep base, Class 1 housing.
(a)
Transformer Housing, L-868C
(b)
Transformer Housing L-867D
c. The following item shall be 5 inch, 9 inch or 16 inch deep base, Class 1 housing.
(a)
Base Can Housing, L-868B
d. These items shall include the identification as described in Section 34 43 00 01.
e. Transformer housing cover shall be minimum thickness of ½ inches.
f. Material for bolts and washers shall be (18-8) stainless steel.
115-2.5 CONCRETE. All concrete used in structures shall conform to the requirements of Item P-610,
Structural Portland Cement Concrete.
115-2.6
FRAMES AND COVERS. The frames shall conform to one of the following requirements.
a.
b.
c.
d.
e.
f.
ASTM A 48
ASTM A 47
ASTM A 27
ASTM A 283, Grade D
ASTM A 536
ASTM A 897
g.
ASTM C857-13
Gray iron castings
Malleable iron castings
Steel castings
Structural steel for grates and frames
Ductile iron castings
Austempered ductile iron castings
Minimum Structural Design Loading for Underground
Precast Concrete Utility Structure
All castings specified shall withstand minimum of HS-20 traffic loading, unless otherwise noted on
drawings.
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CONTRACT No. 8671C
All castings or structural steel units shall conform to the dimensions shown on the plans and shall be
designed to support the loadings specified.
Each frame and cover unit shall be provided with fastening members to prevent it from being dislodged
by traffic, but which will allow easy removal for access to the structure.
All castings shall be thoroughly cleaned. After fabrication, structural steel units shall be galvanized to
meet the requirements of ASTM A 123.
Each frame and cover shall be as shown on the plans or approved equivalent. No cable notches are
required.
115-2.7
LADDERS. Ladders, if specified, shall be galvanized steel or as shown on the plans.
115-2.8 REINFORCING STEEL. All reinforcing steel shall be deformed bars of new billet steel
meeting the requirements of ASTM A 615, Grade 60.
115-2.11 CABLE TRAYS. Cable trays shall be of galvanized steel, plastic, or aluminum. Cable trays
shall be located as shown on the plans.
115-2.12 PLASTIC CONDUIT. Plastic conduit shall comply with Item L-110 - Airport Underground
Electrical Duct Banks and Conduits.
115-2.14 PULLING-IN IRONS. Pulling-in irons shall be manufactured with ⅞ inch diameter hotdipped galvanized steel or stress-relieved carbon steel roping designed for concrete applications (7 strand,
½ inch diameter with an ultimate strength of 270,000 psi). Where stress-relieved carbon steel roping is
used, a rustproof sleeve shall be installed at the hooking point and all exposed surfaces shall be
encapsulated with a polyester coating to prevent corrosion.
115-2.16
SECTIONAL PULL BOX.
a. All concrete sectional pull box shall develop minimum compressive strength of 5000 psi
in 28 Days and conform to A.C.I. 318-71.
b. The structure shall be designed as full traffic loading HS-20 in accordance with ASTM
C857, ACI318 and AASHTO, unless otherwise shown on the plans.
c. All reinforcing steel shall conform to ASTM M615 Grade 60. Minimum #5 rebar shall
be used for the concrete sectional.
d. Typical knockouts for conduit entrance shall be 3 inch diameter knockout with end bells.
All conduits shall have proper grounding and bushing clamps to connect to the ground wire. Conduits
must also have grommet fittings.
e. Top frame shall be ¼ inch formed steel frame.
f.
Threaded inserts and pulling eyes shall be 4 ton cast in as shown.
g. Each sectional box shall have two covers 12 inch (W) x 29 inch (L) tube beam covers.
Structural tubing shall conform to ASTM 501. Tube cover shall be hot dip galvanized after fabrication.
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CONTRACT No. 8671C
h. Each cover shall be furnished with two handles typical to existing airfield covers.
Contractor shall field verify the existing hardware.
i.
The sectional pull box shall be construction per detail drawing.
j. The structural design shall be signed and sealed shop drawings, design calculations, and
other information submitted by the Contractor to allow for a full evaluation by the Contract Manager
115-2.1
CABLE SUPPORT.
a. Underground Devices, Inc. cable saddle rack 3SR1 or approved equal. Refer to drawing
for size and type.
b. Only stainless washers and screws shall be used to mount the cable saddle
c. Install two (2) cable support rack per section.
MATERIAL REQUIREMENTS
ANSI/IEEE Std 81
IEEE Guide for Measuring Earth Resistivity, Ground Impedance,
and Earth Surface Potentials of a Ground System
AC 150/5345-7
Specification for L-824 Underground Electrical Cable for Airport
Lighting Circuits
AC 150/5345-26
Specification for L-823 Plug and Receptacle Cable Connectors
FED SPEC J-C-30
Cable and Wire, Electrical Power, Fixed Installation (cancelled;
replaced by AA-59544 Cable and Wire, Electrical (Power, Fixed
Installation))
ASTM B.3
Soft or Annealed Copper Wire
ASTM B.8
Concentric-Lay-Stranded Copper Conductor, Hard, Medium-Hard,
or Soft
END OF SECTION 34 43 19
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