Construction Unit Descriptions

 

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Contact:
email:
info@ohivey.com
telephone:
(530) 255-4839

PO Box 1356
Sandy UT 84091


- UTOPIA Project History

Most of our project designs are based on the Department of Agriculture's Rural Utilities Service broadband unit nomenclatures and descriptions. The RUS documents can be found:

Most of our construction is not funded by the RUS Broadband program and we are not beholden to their standards. On non-RUS jobs, our design guidelines take precedence. Our design guidelines will be provided to construction vendors as part of the bidding process with key differences from the RUS standard highlighted. We are open to suggestions that may save construction money or time or that will improve the quality of the network or reduce maintenance expenses.

The list below provides descriptions some of the more common units we use.


BFOxx
Like: BFO24I or BFO48IE
The BFO unit is used for buried fiber optic cable assembly units. Each unit consists of one (1) foot (0.305 m) of buried fiber optic cable in place. This unit includes all material and labor for installing, ripping (where necessary as determined by the Engineer), and backfilling, except as specifically provided for in other units. Where the cable is plowed, ripping may be necessary to provide a ripped path to allow placement at the required depth, and may require more than one ripped pass. In most cases, designs call for fiber to be placed in conduit. Ripping and backfilling will usually be provided for in other units.
The Buried Fiber Optic Cable Assembly Unit does not include labor and material for splicing the individual fibers. All splice points, including reel end splices, must be specified by the Engineer on the Construction Sheets. All labor and material required for splicing the fibers and for enclosing the splice, such as, fiber organizers, splice closures, housings and stub poles, and miscellaneous hardware items must be included in other assembly units.
The length of buried cable for compensation purposes is determined by taking the sum of all distances between splice or terminal points specified by the Engineer. It includes the cable installed in trenches, pipes and non-pipe underground crossings, in sections of aerial construction of buried cable and in vertical runs on poles and in stake-mounted or pole-mounted housings. The length of buried cable installed must be determined from the sequential number length markers on the outer jacket of the buried cable except where the markings are illegible or found to be in error. Compensation for multiple cables placed in the same plow slot or trench is determined on the basis of the lengths of the individual cables involved.
Each buried fiber optic cable assembly unit is listed per the number of optical fibers. Each unit is prefixed by the letters BFO.
Common suffixes used with the BFO unit include:

  • I - Buried cable, to be installed inside a duct placed by the contractor. The placement of the duct will be compensated under other units (BFOV(x) and/or BM60( )).
  • IE - Buried cable to be installed inside an existing duct placed by others.
  • W - Buried fiber optic cable placed must have a 3" wide, orange warning tape, installed 18" above the cable. The tape must be imprinted with the words "CAUTION" and "FIBER OPTIC CABLE BURIED BELOW" every 16 to 36".

BFOV(xXx.xx)
Like: BFOV(2x1.25") or BFOV(1x1.00")
One or more vacant ducts specified by the Engineer in the Explanatory Notes to be placed simultaneously in the same plow slot or trench. Specify all cables and duct within parentheses ( ) with every succeeding cable or duct on the following next line. The first value in the V suffix parentheses must indicate the number of ducts by the second value specifying the inside diameter of the ducts in inches or millimeters. If cable is to be pulled into this duct as part of the construction then, cable placement must be compensated under the BFO work units suffixed "I".
Common suffixes used with the BFO unit include:

  • W - Buried fiber optic cable placed must have a 3" wide, orange warning tape, installed 18" above the cable. The tape must be imprinted with the words "CAUTION" and "FIBER OPTIC CABLE BURIED BELOW" every 16 to 36".

BHF(xxXxxXxx)
Like: BHF(36x48x24)
Consists of labor and material for one (1) buried handhole installed in place, including the base, top cover and mounting hardware, and pea gravel. The handhole size, amount of pea gravel and the installation must be as specified by the Engineer. The handhole assembly unit must be used only in areas of non-vehicular traffic. When required for use in areas of vehicular traffic, the handhole must be rated to withstand vehicular traffic. Where specified, vehicular traffic rated handholes must be suffixed with the letter "T".
Common suffixes used with the BHF unit include:

  • T - The buried enclosure is rated to withstand vehicular traffic.

BM2(x/x)(x)
Like: BM2(5/8)(8)
Housing Ground Assembly Unit - Consists of the necessary labor and material for the installation of a ground rod (installed in undisturbed soil), ground rod clamp and the required length of a bare #6 AWG copper ground wire connected to an auxiliary grounding connector (included in the housing assembly unit) within the housing (see unit drawing BM2). Indicate the desired diameter and length of ground rod. For a sectionalized ground rod and coupling device use the suffix "S".

BM21
Like: BM21
Cable Entrance – Consists of the necessary labor and material to terminate fiber optic outside plant cables as shown on the detailed drawings as specified by the Engineer.

BM53F
Like: BM53F
Warning Sign Assembly Unit – Consists of one (1) staked mounted fiber warning sign, in place as shown on the Construction Sheets. This unit includes all labor and material to install the stake mounted sign (see detail drawing specified by the Engineer).

BM60()
Like:
Underground Pipe Assembly Unit – Consists of one (1) lineal foot (0.305m) of Plastic pipe, with the inside diameter in inches (meters) specified in parentheses, installed in place. The standard dimension ratio (SDR) or schedule (SCH) must be specified in the parenthesis as necessary. This unit includes the pushing of pipe and any excavation, backfilling and tamping necessary for the installation of the pipe. The pipe must be installed at the depth specified by the Engineer. The installed pipe must be free of any sharp projections to avoid damage to the outer jacket of the buried cable or wire during its installation in the pipe. This unit includes all material and labor required in the repair and/or replacement of streets, roads, sidewalks, drives, fences, lawns, shrubbery, water mains, pipes, pipelines and contents, underground power and telecommunications facilities and any other property damaged by the excavating, except loss or damage to crops, gardens, trees or ornamental flowers in the construction corridor necessarily incident to the construction of the Project and not caused by the negligence of the Contractor. The contractor will be compensated for labor and material for the buried cable or wire under separate units.
Common suffixes used with the BHF unit include:

  • D - Directional boring required.
  • R - Indicates when a specialized rock boring bit or reamer is required. The unit consists of the labor and equipment required to bore through rock that cannot be accomplished with typical equipment used for a similar bore where rock is not encountered. This unit will only be used when rock is identified in the field and the rock adder is preapproved by the engineer. The rock adder will be paid on a per foot basis only for that portion of the bore that is through rock.

BM61(x)
Like: BM61(3") or BM61(3")D
Underground Non-Pipe Assembly Unit – Consists of the labor in providing a hole in soil one (1) foot (0.305 m) in length and of a diameter in inches (meters) specified in parentheses. The depth of the hole below the surface of the ground must be specified by the Engineer in the plans and specifications. This unit includes any excavation, backfilling and tamping necessary for the installation. This unit may be used where the permanent installation of a steel or plastic pipe under the BM60 unit is not required. This unit includes all material and labor required in the repair and/or replacement of streets, roads, sidewalks, drives, fences, lawns, shrubbery, water mains, pipes, pipelines and contents, underground power and telecommunications facilities and any other property damaged by the excavating, except loss or damage to crops, gardens, trees or ornamental flowers in the construction corridor necessarily incident to the construction of the Project and not caused by the negligence of the Contractor. The contractor will be compensated for labor and material for the buried cable or wire under separate units.
Common suffixes used with the BM61 unit include:

  • D - Directional boring required.
  • R - Indicates when a specialized rock boring bit or reamer is required. The unit consists of the labor and equipment required to bore through rock that cannot be accomplished with typical equipment used for a similar bore where rock is not encountered. This unit will only be used when rock is identified in the field and the rock adder is preapproved by the engineer. The rock adder will be paid on a per foot basis only for that portion of the bore that is through rock.

BM66
Like: BM66
Bridge Attachment Assembly Unit – Consists of the necessary labor and material for installing one (1) lineal foot (0.305 m) of galvanized steel pipe, of the inside diameter in inches (meters) specified, attached to a bridge. Details of the method of installation will be in accordance with the Plans and Specifications as determined by the Engineer. The contractor will be compensated for labor and material for the buried cable or wire under separate units. (See detailed drawings as specified by the Engineer). Where a plastic pipe is required, the unit must be suffixed by the letter "P".

BM71
Like: BM71
Rock Excavating Unit – Consists of one (1) lineal foot (0.305 m) of trenching, blasting, sawing, etc., measured parallel to the surface of the ground, in rock, including excavation, backfilling and tamping to place cable or wire to the depth specified in the Specifications. This unit includes all material and labor required in the repair and/or replacement of streets, roads, sidewalks, drives, fences, lawns, shrubbery, water mains, pipes, pipelines and contents, underground power and telecommunications facilities and any other property damaged by the excavating, except loss or damage to crops, gardens, trees or ornamental flowers in the construction corridor necessarily incident to the construction of the Project and not caused by the negligence of the Contractor. This unit will be specified by the Engineer only when field conditions at the site show the existence of rock to a depth required by the specification, which cannot be trenched, plowed or ripped. If extra depth is required, the unit must be suffixed by "E( )", where the required depth in rock must be shown inside the parentheses. The contractor will be compensated for labor and material for the buried cable or wire under separate units.

BM72
Like: BM72
Asphalt Assembly Unit – Consists of labor and material necessary to remove and restore one (1) lineal foot (0.305 m) of asphalt pavement (where the removal does not necessitate the breaking up of concrete) measured along the route of the cable or wire. Any trenching which may be necessary for the installation of buried cable or wire is included in this unit. All work must be performed as required in accordance with federal, state and/or local construction standards in effect at the time of bid date. (Pursuant to these federal, state and/or local standards, restoration may include the use of any base and sub-base materials such as concrete, crushed stone, etc.). The contractor will be compensated for labor and material for the buried cable or wire under the separate units.

BM73
Like: BM73
Concrete Assembly Unit – Consists of the labor and material necessary to remove and restore one (1) lineal foot (0.305 m) of concrete pavement (or any combination of concrete pavement and other surfacing material) where the removal necessitates the breaking up of concrete pavement, measured along the route of cable or wire. Any trenching which may be necessary for the installation of buried cable or wire is included in this unit. All work must be performed as required in accordance with federal, state and/or local construction standards in effect at the time of bid date. (Pursuant to these federal, state and/or local standards, restoration may include the use of any base and sub-base materials such as concrete, crushed stone, etc.) The contractor will be compensated for labor and material for the buried cable or wire separate units.

BM80
Like: BM80
Riser Guard, 1 inch inside diameter (ID) x 8 feet (25.4 mm x 2.44 m).

BM83
Like: BM83
Buried Service Guard - Consists of a guard, including fasteners, mounted in place over the buried wire or cable and/or ground wire, as shown on the Construction Sheets.

COxx(a)
Like: CO72(6M)
Consists of one (1) foot (0.305 m) of aerial filled fiber optic cable in place including supporting messenger of galvanized steel strand, lashing wire, attachments to strand, bonding of the armor (when present) and strand in accordance with the Construction Sheets. Strand strength is depicted in the parentheses with (6M) meaning 6,000 pound Class A utility grade strand.
The length of aerial cable measured for compensation purposes includes the sum of the cable distances between supporting structures as indicated by the sequential foot markings.
This unit does not include labor and material for fiber splicing, splice closures, housings or organizers. The labor and material for these items are provided for in other units.
Class A galvanized steel utility grade strand shall be provided unless another type is specified by the appropriate suffix.
Each aerial filled fiber optic cable assembly unit is listed in accordance with the number of optical fibers. Each unit is prefixed by the letters CO.
Common suffixes used with the BM61 unit include:

  • A - Aluminum-clad steel strand.
  • C - Class C galvanized steel utility grade strand for corrosion areas.
  • D - Two or more cables are to be initially lashed to the same suspension strand.
  • E - Cables are lashed to existing strand and cable(s).

HACO(xx)
Like: HACO(24)
Consists of an aerial splice closure and the closure manufacturer’s provided encapsulating material if required, installed in place and the labor and material for setting up in preparation for installing the closure, such as, opening the sheath or jacket of the cable, bonding of cable shields, filling the closure if required, and closing the closure, all in accordance with the manufacturer's instructions. It also includes all necessary hardware items to support the cable adjacent to the closure and to terminate the lashing wire. Cable splicing shall be compensated under the appropriate splicing units.
Existing plant assembly units to be rearranged are designated by a prefix "W".

HBFOa
Like: HBFOS or HBFOM or HBFOL
Buried Fiber Optic Closure - A fiber optic closure, splice organizer, and miscellaneous materials adequate for the individual location. Unless otherwise specified by the Engineer, the following suffixes designate the case size in the series of cases specified by the Engineer. Projects that require more than one series of case shall have an additional suffix as specified in the List of Changes, Additions, and Deletion Pages to designate the series of case. The letter "a" designates the case size as small (S), medium (M), or large (L), as specified below by the following suffices:

  • S - Small splice case with up to two main ports and two secondary ports that can accept two smaller main cables, two armored drop cables, or up to four flat drop cables. The largest fiber count cable this case will accept is 96 Fiber.
  • M - Medium splice case with up to four main ports and up to four secondary ports that can accept four smaller main cables, four armored drop cables, or up to six flat drop cables. The largest fiber count cable this case will accept is 288 Fiber.
  • L - Large splice case with greater than four main ports and up to four secondary ports that can accept four smaller main cables, four armored drop cables, or up to eight flat drop cables. The case should be capable of accepting the largest fiber specified in the project. If the case is to be placed on an existing cable that is larger than the largest cable specified in the contract, the Engineer shall adequately specify the maximum cable size that will be placed in the case.

HO
Consists of all labor and material and/or testing necessary to complete a single fiber optic splice, complete a ribbon fiber optic splice using mass splicing, to connect fiber-terminated ports using patch cords, or to terminate one optical splitter pigtail in accordance with RUS Splicing Standard Bulletin 1753F-401(PC-2). The labor must include initial measurement, minimizing the attenuation, splicing and stowing the spliced fiber or patch cord/pigtail in a fiber organizer. The labor and material for the fiber organizer is part of the appropriate splice closure unit or fiber patch equipment.
Options designated by the following suffixes apply:

  • HO1 - Fusion Splice
  • HO2 - Mechanical Splice
  • HO3 - Connector Splice
  • HO4 - Connect Splitter Pigtail (Consists of cleaning and terminating one (1) optical splitter pigtail. The optical splitter must be provided by the Owner or under a separate unit.)
  • HO5( ) - Fiber Optic Connection (Consists of cleaning and terminating an optical patch cord as specified in the List of Changes, Additions, and Deletions section of the contract by the Engineer. The parenthesis must be used to differentiate between different types of patch cords in the same contract.)
  • HO#R - Consists of all labor and material necessary to splice and test one (1) glass fiber of a ribbon matrix cable assembly to one (1) glass fiber in a ribbon matrix cable assembly. This unit is only used when a consecutive group of 12 fibers in the ribbon assembly are being spliced to 12 consecutive fibers of another ribbon assembly. Splices of partial ribbon assemblies or of a ribbon assembly to a buffer tube assembly are compensated with the appropriate HO# suffixes 1 – 5( ).

ONT
Like: ONT
The optical network terminal as designated by the project.

PE
Like: NPE1-2G or NPE2-2G
Consists of strand and hardware; and insulators or ground connection where required. For guying purposes, when a cable messenger strand is extended one or more spans to a deadend structure, the strand in each such span shall be considered as an overhead guy for the appropriate size of strand used.
The assembly units are defined as follows:

  • PE1-2 Down Guy for 6M strand
  • PE1-3 Down Guy for 10M strand
  • PE1-4 Down Guy for 16M strand
  • PE1-2G Down Guy, Ground Connection Type for 6M strand
  • PE1-3G Down Guy, Ground Connection Type for 10M strand
  • PE1-4G Down Guy, Ground Connection Type for 16M strand
  • PE2-2 Overhead Guy for 6M strand
  • PE2-3 Overhead Guy for 10M strand
  • PE2-4 Overhead Guy for 16M strand
  • PE2-2G Overhead Guy, Ground Connection Type for 6M strand
  • PE2-3G Overhead Guy, Ground Connection Type for 10M strand
  • PE2-4G Overhead Guy, Ground Connection Type for 16M strand

Note: When the above Guy Assembly Units are to be installed on existing poles, the assembly unit designation is prefixed by the letter "N".
Unless otherwise indicated by an additional suffix, the strand furnished on the Project will be seven-wire, Class A galvanized steel utility grade.
The following suffix may be used:

  • A - Aluminum - Clad steel
  • C - Class C galvanized steel utility grade

PF
Like: PF1-3
Consists of the anchor with rod, complete and in place, ready for attaching the guy strand.
The assembly units are defined as follows:

  • PFl-3 Expanding Anchor - 6,000 lbs (26,688 N)
  • PFl-5 Expanding Anchor - 10,000 lbs (44,480 N)
  • PFl-7 Expanding Anchor - 16,000 lbs (71,168 N)
  • PF2-3 Plate Anchor - 6,000 lbs (26,688 N)
  • PF2-5 Plate Anchor - 10,000 lbs (44,480 N)
  • PF2-7 Plate Anchor - 16,000 lbs (71,168 N)
  • PF3-3 Screw Anchor - 6,000 lbs (26,688 N)
  • PF3-5 Screw Anchor - 10,000 lbs (44,480 N)
  • PF3-7 Screw Anchor - 16,000 lbs (71,168 N)
  • PF5-3 Rock Anchor - 3/4 in. dia. (19 mm) rod
  • PF5-4 Rock Anchor - 1 in. dia. (25.4 mm) rod
  • PF6-3 Swamp Anchor - 10 in. dia. (254 mm)
  • PF6-4 Swamp Anchor - 12 in. dia. (305 mm)
  • PF6-5 Swamp Anchor - 15 in. dia. (381 mm)

Note: When twineye rods are required for the above anchor assembly units, the unit designation is suffixed by the letter "A".

PM2A
Like: PM2A
Ground wire assembly for bonding aerial cable strand or support wire to electric system neutral or pole ground assembly.

PM11
Like: PM11
Guy guard.

R
Like: R1-5 or R3-5
Aerial right-of-way and trimming units as follows

  • R1-5: Is one (1) foot (0.305 m) in length and 5 feet (1.52 m) in width (to be measured on one side of the pole line) of actual clearing of right-of-way. The unit applies to clearing right-of-way along new or existing telecommunications pole lines and along existing power pole lines. This includes clearing of underbrush, tree removal, and such tree trimming as may be required to leave an unobstructed right-of-way from the ground up on one side of the line of poles carrying wire or cable. The length of actual clearing shall be measured in a straight line parallel to the line between poles and across the maximum dimension of foliage cleared (not trunk) projected to the ground line. All trees and underbrush across the width of the right-of-way shall be considered to be grouped together as a single length in measuring the total length of clearing. Lengths along the right-of-way in which no trees are to be removed or trimmed or underbrush cleared shall be omitted from the total measurement. This unit includes the removal, or topping (cutting out the top of the tree so that if the remaining portions of the tree fall, they will not endanger the line) at the option of the Contractor, of danger trees outside of the right-of-way when so designated by the Engineer. (Danger trees are defined as dead or leaning trees, which, in falling, would affect the operation of the line.) The Contractor shall not remove or trim shade, fruit, or ornamental trees unless so directed by the Engineer.
  • R1-10: Identical to R1-5 except that width is 10 feet (3.05 m).
  • R2-5: Identical with R1-5, except that width 10 feet (3.05 m); to be measured 5 feet (1.52m) on each side of the pole line.
  • R2-10: Identical with Rl-5, except that width 20 feet (6.1 m), to be measured 10 feet (3.05m) on each side of the pole line.

    Note: The letter "M" added as a suffix to the above "R" units designates units for reclearing existing right-of-way. With the exception of the substitution of the word "reclearing" for "clearing".

  • R3-5: Is one (1) foot (0.305 m) in length and consists of the trimming of foliage and branches from trees growing on or adjacent to the right-of-way so as to provide a clearance of not less than 5 feet (1.52 m) in all directions from telecommunications cable. This unit is measured parallel to the pole line across the maximum width of foliage trimmed. All trees, underbrush or shrubbery across the width trimmed shall be considered to be grouped together as a single length in measuring the total length of trimming. Lengths along the right-of-way in which no trimming is performed shall be omitted from the total measurement. Any trimming included in Rl or R2 right-of-way clearing units, shall not be considered a part of the measurement of the unit. The Contractor shall not trim any shade, fruit or ornamental trees unless so directed by the Engineer. When so designated by the Engineer, a tree may be trimmed of its branches with the trunk left extending into the zone to be trimmed.

SEBFxI
Like: SEBF6I
Specified count of fiber placed in innerduct for a service entrance.

UD(xXx-X)
Like: UD(1X1-1.00")
Consists of one (1) foot [0.305 meters (m)] of single or multiduct conduit in place. This unit includes all material and labor for the placement of the conduit to the depth indicated in the specifications.
The assembly unit is defined as follows: UD (The number of conduits placed horizontally, and vertically, and
the inside diameter (distance between opposite walls for square
conduit)).
This unit also includes: (1) All labor and material required for conduit jointing, such as, conduit bends, couplings, adapters, fittings, plugs or seals, and spacers. (2) All material and labor required in the repair of streets, roads, sidewalks, drives, fences, lawns, shrubbery, trees, watermains, pipes, pipelines and contents, underground power and telecommunications facilities, and any other incidental property damaged during the installation of underground conduit. (3) All labor and material for trenching, shoring, backfilling, tamping, and disposal of water and excess or unusable material. (4) All labor required for rodding and cleaning of conduit as specified by the Engineer.
Existing plant assembly units to be rearranged are designated by a prefix "W".
Options designated by the following suffixes apply:

  • E - This unit consists of necessary labor and materials to encase the conduit in concrete. (Encasement shall consist of a 2 inch (in.) 51 millimeters (mm)] minimum cover over the conduit(s), a minimum of 1-1/2 in. (38 mm) at the sides and a minimum of 2 in. (51 mm) for the base.)
  • S - This unit consists of the necessary labor and materials to encase the conduit in sand or fine earth. (Encasement shall consist of a 4 in. (102 mm) cover over the conduit(s), a minimum of 1-1/2 in. (38 mm) at the sides and a minimum of 3 in. (76 mm) for the base.)
  • B - This unit consists of the necessary labor and materials to provide a concrete base for the conduit assembly unit as determined by the Engineer. (Concrete base will be 3 in. (76 mm) in thickness for the width of the trench.)
  • C - This unit consists of the necessary labor and materials to provide a concrete cover for the conduit assembly unit as determined by the Engineer. (The concrete cover shall have a minimum thickness of 3 in. (76 mm) and shall be at least as wide as the conduit.)
  • A - This unit consists of the necessary labor and materials to remove and restore paved surfaces. All work shall be performed as required in accordance with federal, state and/or local construction standards in effect at the time of bid date.
  • V - This unit consists of the necessary labor and materials to place one or more vacant innerduct(s) in a conduit. The parentheses for the UD unit shall indicate the number of innerducts followed by the inside diameter of the innerduct to be placed in new or existing conduit, including rodding and cleaning of the conduit if necessary.

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