SECTION 710: PULL BOXES AND SPLICE CABINETS
710.1 Description
This Work consists of providing and installing pull boxes and s plice cabinets, and constructing Traf fic Signal manholes.
710.2 Materials
710.2.1 General
The Contractor shall provide elec trical pull boxes for use in n on-deliberate traffic areas, pull boxes and covers shall comp ly with all test provisions of ANSI/SCTE 77 2010 “Specification for Underground Enclosure Integrity.” The Contractor shall provide metal pull boxes for use in Bridg e decks, railing, and other areas subject to deliberate vehi cular traffic, provide enclosed watertight metal pull boxes that support, in place, an AASHTO H 20 loading (32,000 lb single axl e over a 10 in x 20 in area), unless otherwise specified in the Contract.
710.2.2 Non-Deliberate Traffic Rated Polymer Concrete Pull Box
Non-deliberate traffic areas pull boxes shall be made of polyme r coated concrete with fiberglass reinforcement. The bo x shall have continuous fiberg lass cloth reinforcement on the inside and outside perimeter. The covers shall have a minimum of two (2) layers of fiberglass cloth reinforcement. Pull boxes shall comply with all test pro visions of ANSI/SCTE 77 2010, “Specification for Underground Enclosure Integrity.” All non-d eliberate traffic pull boxes shall be tested and certified by UL 66WF (Underwriters Laboratories) or a nationally recognized third party independent test lab and re-verified every year to meet all test provisions of the ANSI/SCTE 77 2010 “Specifications for Underground Enclosure Int egrity.”
710.2.3 Deliberate Traffic Rated Pull Boxes
The Contractor shall provide me tal pull boxes in accordance wit h the following: 1. Of closed-bottom type (external recess flanged), designed fo r flush mounting in concrete; 2. Designed for deliberate vehicular traffic (AASHTO H 20 loadi ng); and 3. Fabricated from cast iron with a hot-dipped galvanized finis h.
710.2.4 General Pull Box Cover Requirements
All pull box covers shall be designed for the required loadings and shall meet or exceed the rated loading of their corresponding pull box. Pull box covers shall be sealed with a neoprene gasket providin g a NEMA 4 water tight enclosure. All non-deliberate traffic pull box covers shall comply with al l test provisions of ANSI/SCTE 77 2010 “Specification for Underground Enclosure Inte grity” and shall meet Tier 15 application. Markings showing the Tier 15 rating shall be e mbossed on the top surface of the cover. All non-deliberate traffic pull box es shall comply with all tes t provisions of ANSI/SCTE 77 2010 “Specification for Underground Enclosure Integrity” and sh all meet the Tier 22 Section 710: Pull Boxes and Splice Cabinets Page 828 application. Markings showing th e Tier 22 rating shall be labe led or stenciled on the inside and outside of the box. All non-deliberate traffic pull boxes and covers shall be made of polymer coated concrete with fiberglass reinforcement. The box shall have continuous f iberglass cloth reinforcement on the inside and outside perimeter. The covers must have a minim um of two (2) layers of fiberglass cloth reinforcement. All deliberate traffic rated pull boxes and covers must be made from matched metal tooling to ensure product uniformity. All Covers must be secured to pull box using ½-13UNC S.S. penta head bolts. Fasteners must be capable of withstanding a torque of 56 ft-lbs and a pull out strength of 750 lbs. The pull out test must be performed with the cover in place and fasteners torqued to 56 ft-lbs. Fasteners, inserts, and cover must not be damaged b y the performance of this test. Covers must have a non-skid surface with recessed lock-down loc ations for penta head bolts and pry bar slots. The nominal dimensions of the o pening in which the cover sits m ust be the same as the cover dimensions except the leng th and width dimensions must be 1/8” or greater. The Contractor shall provide cast iron covers for concrete pull boxes where concrete pull boxes are specified in the Contract. The Contractor shall fabricate No. 4 bare copper ground clamps to attach grounds to cast iron or steel covers where used on pull boxes without grounding provisions, unless otherwise specified in the Contract.
710.2.5 Pull Box Cover Inscriptions
The Contractor shall inscribe or emboss pull box covers with th e words “TRAFFIC SIGNAL” or “LIGHTING,” as specified in the Contract. The Contr actor shall glue in logos shall not be permitted. On deliberate traffic rated pull boxes, the Contractor shall use a bead weld or other type of permanent lettering approved by the Project Ma nager to identify the specific circuit, as follows: 1. “Lighting” = Lighting and Rest Area Electrical; 2. Traffic Signal = “TS;” and 3. Sprinkler Control = ”SC.” If using a bead weld on a galvani zed box, the Contractor shall coat the affected area with zinc-rich paint.
710.2.6 Splice Cabinet
The Contractor shall provide a NEMA 12 enclosure UL listed “Ind ustrial Control Panel” in accordance with UL 506.
710.2.7 Concrete and Reinforcing Steel
The Contractor shall provide Class A concrete, cement, air entr ainment, admixtures, water, and aggregate in accordance with Section 510, “Portland Cement Concrete.” Section 710: Pull Boxes and Splice Cabinets Page 829 The Contractor shall provide st eel reinforcement in accordance with Section 540, “Steel Reinforcement.”
710.2.8 Drainage Geotextiles
The Contractor shall provide Cl ass B drainage geotextiles in ac cordance with Section 604, “Soil and Drainage Geotextiles.”
710.2.9 Traffic Signal Manhole
710.2.9 1 Concrete Collar
The Contractor shall provide Clas s A concrete in accordance wit h Section 510, “Portland Cement Concrete.”
710.2.9 2 Steel Culvert Pipe
The Contractor shall provide corrugated metal pipe Culvert in a ccordance with Section 570, “Pipe Culverts.” The Contractor shall dip steel Culvert pipe in coal tar enamel or coat with polymeric coating approved by the Project Manager. The Contractor shall provide a three (3) mil thick coating in accordance with AASHTO M 246.
710.2.9 3 Manhole Covers
The Contractor shall provide Traffic Signal manhole covers in a ccordance with Section 662, “Manholes.”
710.3 Construction Requirements
710.3.1 General
The Contractor shall install eac h pull box flush with the curb or Sidewalk grade with no part of the box or attaching screws protruding above the surfac e. If no grade is specified, the Contractor shall place pull boxes slightly higher than the surr ounding ground to provide drainage away from the pull box. Pull boxes should not be inst alled within the ADA ramp area. The Contractor shall install metal pull boxes in Bridge decks a nd pavement flush with the pavement surface. The Contractor shall install electrical pull box extensions to provide additional volume, as necessary or as specified in the Contract. If necessary to facilitate the Work (for the Contractor conveni ence), the Contractor shall install more pull boxes than shown in the Contract at no additi onal cost to the Department. The Contractor shall provide each pull box with a Class A concr ete collar placed around the pull box, separated by a 1/2 inch felt expansion joint. If placing concrete collar in an area to receive colored concrete, the Contractor shall match the pul l box concrete color with the colored concrete.
710.3.2 Deliberate Traffic Rated Pull Boxes
The Contractor shall make conduit entrances in metal pull boxes with a hole saw, or as Section 710: Pull Boxes and Splice Cabinets Page 830 approved by the Project Manager.
710.3.3 Pull Box Sumps
The Contractor shall provide su mps in pull boxes consisting of two (2) inch maximum size rock fill, surrounded by drainage geotextile. With the exception of metal pu ll boxes installed in concrete, t he Contractor shall provide an 18 inch deep sump below pull boxes. If using pull box exten sions with pull boxes to provide extra depth, make sumps 30 inches deep. Excavate holes to allow a minimum six (6) inch clearance on the sides of the boxes and extensions. The Contractor shall provide rock fill around outs ide walls. The Contractor shall place Class B drainage geotextile between the backfill and rock fill.
710.3.4 Traffic Signal Manhole
The Contractor shall install each Traffic Signal manhole so tha t the cover is flush with the curb or Sidewalk grade and no part of the manhole protrudes abo ve finish grade. If the Contract does not specify a grade, the Contractor shall place c overs slightly higher than the surrounding ground to provide drainage away from the manhole.
710.4 METHOD OF MEASUREMENT—Reserved
710.5 Basis of Payment
Pay Item Pay Unit Electrical Pull Box (Standard) Each Electrical Pull Box (Large) Each Electrical Pull Box Extension Each Metal Pull Box Each Splice Cabinet Each Traffic Signal Manholes Each
710.5.1 Work Included in Payment
The following Work and items will be considered as included in the payment for the main items and will not be measured or paid for separately: 1. Hardware; 2. Excavation, backfill, and compaction; 3. Reinforcing steel; 4. Concrete; and 5. Materials for pull box and Traffic Signal manhole sumps. Section 711: Wiring Page 831