Page 8-118 M 41-10
8-21 Permanent Signing8-21 Permanent Signing
8-21.1 Description
This Work consists of furnishing and installing permanent signing, sign removal, sign relocation, and refacing existing signs in accordance with the Plans, these Specifications, and at the locations shown in the Plans or where designated by the Engineer.
8-21.2 Materials
Materials shall meet the requirements of the following sections: Roadside Sign Structures 9-06.16 Permanent Signs 9-28 Sign Support Structures 9-28.14 Temporary Casing 9-36.1(2) Synthetic Slurry 9-36.2(2) Water Slurry 9-36.2(3) The Contractor shall submit a Manufacturer’s Certificate of Compliance for all permanent signs in accordance with Section 1-06.3 ; a copy of the Manufacturer’s Certificate of Compliance shall be available at the fabricator’s plant. Permanent signs will be inspected at the fabricator’s plant prior to shipment to the project unless otherwise accepted by the Engineer. Signs without an approved decal will not be installed on the project with the exception of double-faced signs which do not receive decals or fabricator’s stickers.
8-21.3 Construction Requirements
8-21.3(1) Location of Signs
Signs are located in the Plans by station numbers. These are tentative locations subject to change by the Engineer. The post lengths specified in the Plans are estimated for Bid purposes only. Final lengths of timber posts will be determined or verified by the Engineer at the request of the Contractor prior to fabrication. Final lengths of steel posts will be determined by the Engineer prior to fabrication.
8-21.3(2) Placement of Signs
All reflectorized signs located less than 30 feet from the edge of the lane should be turned out approximately 3 degrees from the pavement edge of oncoming traffic lanes, and those located 30 feet or more from the edge of the lane should be turned in approximately 3 degrees from the pavement edge of oncoming traffic lanes. All sign posts shall be plumb and signs level. The signs shall be inspected at night by the Engineer and, if specular glare occurs from failure to install at 3 degrees as stipulated, the Contractor shall reinstall the signs at no expense to the Contracting Agency. The post holes shall be of sufficient dimensions to allow placement and thorough compaction of selected backfill material completely around the post. Selected backfill material shall consist of earth or fine sandy gravel free from organic matter with no individual particles exceeding 1½ inches in diameter.
8-21.3(3) Sign Covering
When notified by the Engineer, the Contractor shall cover or uncover certain signs to facilitate and control the operation of the project. The covering shall consist of 4 mils minimum thickness black polyethylene sheeting of sufficient size to entirely cover the sign, unless otherwise approved by the Engineer, and shall extend over the edges of the sign and fastened on the back. The Contractor shall not use adhesive tapes on the face of the signs. Other methods of covering may be considered if approved by the Engineer. M 41-10 Page 8-119 Permanent Signing 8-218-21.3(4) Sign Removal Where shown in the Plans or ordered by the Engineer, the existing signs and, if so indicated, the sign Structures shall be removed by the Contractor. Sign Structures shall include sign bridges, cantilever sign Structures, bridge-mounted sign brackets, and all other sign-mounting Structure shown in the Plans to be removed by the Contractor. The embedded anchors attaching signs and sign Structures specified for removal to existing concrete Structures shall be removed a minimum of 1 inch beneath the existing concrete surface. The void left by removal of the embedded anchors shall be coated with epoxy bonding agent and filled with mortar conforming to Section 9-20.4(2) . The epoxy bonding agent shall be Type II, conforming to Section 9-26.1, with the grade and class as recommended by the epoxy bonding agent manufacturer and as approved by the Engineer. The mortar shall consist of cement and fine aggregate mixed in the proportions to match the color of the existing concrete surface as near as practicable. Where indicated, the Contractor shall remove concrete pedestals to a minimum of 2 feet below Subgrade or finished ground elevation and backfill the hole to the satisfaction of the Engineer. Where an existing sign post is located within a sidewalk area, the Contractor shall remove the post and finish the area so as to make the sidewalk continuous. Where signs are removed from existing overhead sign Structures, the existing vertical sign support braces shall also be removed. The removed aluminum signs, wood signs, wood sign posts, wood structures, metal sign posts, wind beams, and other metal structural members and all the existing fastening hardware connecting such members shall become the property of the Contractor and shall be removed from the project. Salvage value of the removed signs and sign Structure members shall be reflected in the Contractor’s Bid price for other items of Work.
8-21.3(5) Sign Relocation
Where shown in the Plans, the existing signs and, if so indicated, the sign Structures shall be relocated by the Contractor to the location noted. Where the existing sign Structure is mounted on concrete pedestals, the Contractor shall remove the pedestal to a minimum of 2 feet below finished grade and backfill the remaining hole with material similar to that surrounding the hole. When the existing Structure is to be relocated, the Contractor shall provide all necessary materials, labor and hardware to erect and provide an operable unit. All materials damaged by the Contractor shall be replaced at no cost to the Contracting Agency. Unless otherwise allowed relocation of each existing sign and Structure shall be accomplished during the day in which it was removed. Relocation of overhead signs and Structures shall be accomplished during the hours between 12 midnight and 4:00 a.m. or as approved by the Engineer.
8-21.3(6) Sign Refacing
Where indicated in the Plans or in the Special Provisions, the Contractor shall reface existing signs with sheet aluminum overlay panels. Unless otherwise indicated in the Plans or allowed by the Engineer, all Work shall be accomplished while the existing sign is in place. Modifications to each sign shall be completed during the same day in which the Work is commenced. Prior to the installation of overlay panels, the existing legend (message and border) shall be removed. The aluminum overlay panels shall be butt jointed. Aluminum or stainless steel screws, a minimum of ½ inch in length, shall be used to attach overlay panels to existing plywood signs. In addition to the screws, two ¼-inch diameter by 1-inch-long aluminum or stainless steel bolts shall be installed through the top of each panel and the plywood sign. Aluminum blind rivets shall be used to attach overlay panels to existing aluminum signs. Screws or rivets shall be installed at 24-inch centers. Unless otherwise noted, sign background material shall be in accordance with Section 9-28 . Page 8-120 M 41-10
8-21 Permanent SigningAfter installation of overlay panels, the existing legend shall be reinstalled or, where
indicated in the Plans, new legend or portions thereof shall be furnished and installed by the Contractor. Direct applied legend shall be applied to the new face prior to resurfacing. Layout and letter spacing shall be in accordance with Contracting Agency standards unless otherwise approved by the Engineer. New legend components shall be of the same type and size as the existing materials, and it shall be the Contractor’s responsibility to verify material type and size. Materials damaged by the Contractor shall be replaced at no expense to the Contracting Agency.
8-21.3(7) Sign Message Revision
Where indicated in the Plans or in the Special Provisions, the Contractor shall revise existing sign messages or layouts. The Contractor shall remove and reinstall portions of or all of the existing message or furnish and install new message components as necessary to provide the revised message as indicated. Prior to installing the revised message, the Contractor shall thoroughly clean the sign face and plug all existing rivet holes with aluminum blind rivets painted the same color as the area immediately surrounding the rivet head, with the exception that rivet heads in the white colored sign areas shall be coated to match the white color or be uncoated rivet heads. Plugging screw holes in plywood signs will not be required. Modifications to the sign shall be completed during the same day in which Work is commenced and while the sign is in place. All new materials necessary to accomplish this Work shall be the same type and size as the existing components, and it shall be the Contractor’s responsibility to verify such component type and size. Materials damaged by the Contractor shall be replaced at no expense to the Contracting Agency. Existing materials not reinstalled shall become the property of the Contractor and shall be removed from the project.
8-21.3(8) Sign Cleaning
Signs shall be cleaned after relocation or installation to the satisfaction of the Engineer. The Contractor shall not use cleaning solvents that would be harmful to the sign finish.
8-21.3(9) Sign Structures
8-21.3(9)A Fabrication of Steel Structures
Fabrication shall conform to the applicable requirements of Sections 6-03 and 9-06 . All welded connections of sign bridge and cantilever sign Structure posts, arms, and beams, including base and connection plates, shall be cleaned prior to welding to remove all mill scale from within 2 inches of the weld. As an alternative to the blast cleaning requirements of Section 6-03.3(13) , the Contractor may perform the cleaning using power hand tools as approved by the Engineer. Unless otherwise specified in the Plans or Special Provisions, metal surfaces shall not be painted. All fabrication, including repairs, adjustments or modifications of previously fabricated sign structure members and connection elements, shall be performed in the shop, under a Working Drawing prepared and submitted by the Contractor for the original fabrication or the specific repair, adjustment or modification. Sign structure fabrication repair, adjustment or modification of any kind in the field is not permitted. If fabrication repair, adjustment or modification occurs after a sign structure member or connection element has been galvanized, the entire member or element shall be re-galvanized in accordance with AASHTO M 111.
8-21.3(9)A1 Fabrication of Monotube Sign Bridges and Cantilever Sign Structures
The fabricator shop will provide a Certified Welding Inspector. The inspector shall be a AWS Certified Welding Inspector (CWI) qualified and certified in accordance with the provisions of AWS QCI Standard for Qualification and Certification. M 41-10 Page 8-121 Permanent Signing 8-21Welds shall be inspected as follows:
1.Visual Inspection in accordance with Section 6-03.3(25)A1 .
2.Magnetic Particle Inspection in accordance with Section 6-03.3(25)A4 .
3.Ultrasonic Inspection in accordance with Section 6-03.3(25)A3 .
4.Dye-Penetrant or Magnetic Particle Inspection The post to beam connection weld shall have 100 percent of its length inspected using dye-penetrant or magnetic-particle testing techniques. The inspection shall be performed after the root pass and after completion of the weld. All bolted connections shall be made using the direct tension indicator method in accordance with Section 6-03.3(33) . Splice connections made using the direct tension indicator method are not required to be inspected in accordance with Section
6-03.3(33)B and will be accepted based on feeler gauge measurements conforming to
Table 3 in Section 6-03.3(33) . All bolted connection faying surfaces shall be flat after fabrication as required to provide a solid fit upon assembly in accordance with Section 6-03.3(33) . The flatness of the faying surfaces shall be flat to within a tolerance of 1/32 inch in 12 inches and a tolerance of 1/16 inch overall. Base plates with leveling nuts shall be flat to within a tolerance of 1/8 inch in 12 inches and a tolerance of 3/16 inch overall. In order to achieve the flatness requirements, the Contractor may need to mill or machine the plates. The Contractor shall increase plate thicknesses as needed to ensure the remaining section meets the specified thickness after such machining or milling. At bolted connections, both faying surfaces shall be at right angles to the bolt axis, parallel to each other, and shall be in full contact in the assembled condition. Full contact is defined as 90-percent of the outside and inside perimeters of the splice plates being visually in contact. The outside surface shall be inspected just inside the shell of the monotube and the inside shall be inspected at the handhole. Splices shall be fabricated such that the required camber remains continuous and smooth across the field splice. Prior to galvanizing, the Contractor shall shop assemble the completed Structure lying on its side in an undeflected position to ensure correct alignment, accuracy of holes, fit of joints, smooth camber profile, and the specified amount of camber. The joints shall be bolted with a sufficient number of bolts tightened snug tight to close the joints in full contact as they would be in the final field assembled position as defined above. The Contractor shall not disassemble the sign structure for galvanizing as specified until receiving the Engineer’s acceptance of the shop assembled structure. All galvanized surfaces exposed to view after erection shall be shop painted or shop powder coated in accordance with Section 6-07.3(11) , except when the Plans or Special Provisions require field painting only in accordance with Sections 6-07.3(9)I and
6-07.3(11)A Contact surfaces of the field bolted connections shall be left as galvanized
without an overcoat. Unless otherwise specified in the Special Provisions the color of the finish coat shall match SAE AMS Standard 595 color number 35237 when dry. All galvanized surfaces specified to be painted or powder coated shall be prepared for coating in accordance with Section 6-07.3(11) . After completing erection, the Contractor shall repair all metal surfaces with damaged paint or powder coatings and exposed metal with a field repair coating in accordance with Section 6-07.3(9)I and Section 6-07.3(11)A (for paint) or Section 6-07.3(11)B (for powder coating). The color of the finish coat of the field repair coating, when dry, shall match the color specified above. Page 8-122 M 41-10
8-21 Permanent SigningThe Contractor shall furnish and install the vibration damper as shown in the Plans. The
damper shall be installed before the sign structure is erected.
8-21.3(9)B Erection of Steel Structures
Erection shall conform to the applicable requirements of Section 8-21.3(9)F . Before erecting steel Structures, the Contractor shall submit an erection plan as a Type 2 Working Drawing. The erection plan shall provide complete details of the erection process including at a minimum:
1.Procedure and sequence of operation;
2.Structure weights, lift points, and rigging devices;
3.Crane(s) make and model, weight, geometry, lift capacity, outrigger size and reactions;
4.Locations of cranes, trucks delivering structures, and the location of cranes and outriggers relative to other Structures, including retaining walls and wing walls. Section 8-21.3(9)F notwithstanding, the Contractor may erect a sign bridge prior to completion of the shaft cap portion of one foundation for one post provided the following conditions are satisfied:
1.The Contractor shall submit a Type 2E Working Drawing consisting of design calculations and details of the temporary supports and falsework supporting the sign bridge near the location of the incomplete foundation. The submittal shall include the method of releasing and removing the temporary supports and falsework without inducing loads and stress into the sign bridge.
2.The Contractor shall submit a Type 2 Working Drawing consisting of the method used to secure the anchor bolt array in proper position with the sign bridge while casting the shaft cap concrete to complete the foundation.
3.The Contractor shall erect the sign bridge and temporary supports and falsework, complete the remaining portion of the incomplete foundation, and remove the temporary supports and falsework, in accordance with the accepted Working Drawings.
8-21.3(9)C Timber Posts
Timber sign posts shall conform to the requirements of Section 9-28.14(1) .
8-21.3(9)D Aluminum Structures
Welding of aluminum shall be in accordance with Section 9-28.14(3) .
8-21.3(9)E Bridge Mounted Sign Brackets
The Contractor shall fabricate and install sign supports for mounting signs on bridge Structures at the locations and as shown in the Plans, including inserts and anchor bolts. Fabrication and installation shall be in accordance with applicable requirements of Sections 6-03 and 9-06. Metal surfaces shall not be painted. The quantity of structural carbon steel shown in the Contract is listed only for the convenience of the Contractor in determining the volume of Work involved and is not guaranteed to be accurate. The prospective Bidders shall verify this quantity before submitting a Bid. No adjustments other than for approved changes will be made in the lump sum Contract price for the bridge mounted sign brackets, even though the actual quantity of structural carbon steel required may deviate from that listed.
8-21.3(9)F Foundations
The excavation and backfill shall conform to the requirements of Section 2-09.3 . Where obstructions prevent construction of planned foundations, the Contractor shall construct an effective foundation satisfactory to the Engineer. M 41-10 Page 8-123 Permanent Signing 8-21The bottom of concrete foundations shall rest on firm ground. If the portion of the foundation beneath the existing ground line is formed or cased instead of being cast against the existing soil forming the sides of the excavation, then all gaps between the existing soil and the completed foundation shall be backfilled and compacted in accordance with Section 2-09.3(1)E . Concrete placed into an excavation where water is present shall be placed using an approved tremie. If water is not present, the concrete shall be placed such that the free- fall is vertical down the center of the shaft without hitting the sides, the steel reinforcing bars, or the steel reinforcing bar cage bracing. The Section 6-02.3(6) restriction for 5-feet maximum free-fall shall not apply to placement of Class 4000P concrete into a shaft. Foundations shall be cast in one operation where practicable. The exposed portions shall be formed to present a neat appearance. Class 2 surface finish shall be applied to exposed surfaces of concrete in accordance with the requirements of Section 6-02.3(14)B. Where soil conditions are poor, the Engineer may order the Contractor to extend the foundations shown in the Plans to provide additional depth. Such additional work shall be paid for according to Section 1-04.4 . Forms shall be true to line and grade. Tops of foundations for roadside sign structures shall be finished to ground line unless otherwise shown in the Plans or directed by the Engineer. Tops of foundations for sign bridges and cantilever sign structures shall be finished to the elevation shown in the Plans. Both forms and ground that will be in contact with the concrete shall be thoroughly moistened before placing concrete; however, excess water in the foundation excavation will not be permitted. Forms shall not be removed until the concrete has set at least 3 days. All forms shall be removed, except when the Plans or Special Provisions specifically allow or require the forms or casing to remain. Foundation concrete shall conform to the requirements for the specified class, be cast-in- place concrete, and be constructed in accordance with Sections 6-02.2 and 6-02.3 . After construction of concrete foundations for sign bridge and cantilever sign structures, the Contractor shall survey the foundation locations and elevations, the anchor bolt array locations and lengths of exposed threads. The Contractor shall confirm that the survey conforms to the sign structure post, beam, span and foundation design geometry shown in the Plans prior to completion of the sign structure foundation and shall identify all deviations from the design geometry shown in the Plans. When deviations are identified, the Contractor shall notify the Engineer and submit a Type 2 Working Drawing consisting of the Contractor’s proposed method(s) of addressing the deviations. Sign structures shall not be erected on concrete foundations until the Contractor confirms that the foundations and the fabricated sign structures are either compatible with each other and the design geometry shown in the Plans or have been modified in accordance with this section and as accepted by the Engineer to be compatible with each other, and the foundations have attained a compressive strength of 2,400-psi. In addition to the basic requirements, sign bridges and cantilever sign structures shall be installed in accordance with the following:
1.Foundation excavations shall conform to the requirements of Section 2-09.3(3) .
2.Tops of foundations for sign bridges and cantilever sign structures shall be finished to the elevation shown in the Plans.
3.Steel reinforcing bars shall conform to Section 9-07 .
4.Concrete shall be Class 4000P, except as otherwise specified. The concrete for the shaft cap (the portion containing the anchor bolt array assemblies above the construction joint at the top of the shaft) shall be Class 4000. Page 8-124 M 41-10
8-21 Permanent Signing5. All bolts and anchor bolts shall be installed so that two full threads extend beyond
the top of the top heavy-hex nut. Anchor bolts shall be installed plumb, plus or minus 1 degree.
6.Plumbing of sign bridges and cantilever sign structures shall be accomplished by adjusting leveling nuts. Shims or other similar devices for plumbing or raking will not be permitted.
7.The top heavy-hex nuts of sign bridges and cantilever sign structures shall be tightened in accordance with Section 6-03.3(33) , and by the Turn-of-Nut Method to a minimum rotation of ¼ turn and a maximum of ⅓ turn past snug tight. Permanent marks shall be set on the base plate and nuts to indicate nut rotation past snug tight. In addition to the basic requirements, roadside sign structures shall be installed in accordance with the following:
1.Tops of foundations shall be finished to final ground line unless otherwise shown in the Plans or staked by the Engineer.
2.Steel reinforcement, including spiral reinforcing, shall conform to Section 9-07.2 .
3.Unless otherwise shown in the Plans, concrete shall be Class 4000P. Class 4000P concrete for roadside sign structures does not require air entrainment.
4.The assembly and installation of all Type TP-A or Type TP-B bases for roadside sign structures shall be supervised at all times by either a manufacturer’s representative or an installer who has been trained and certified by the manufacturer of the system. If the supervision is provided by a trained installer, a copy of the installer’s certification shall be provided to the Engineer prior to installation.
5.For all Type TP-A or TP-B bases, the Contractor shall attach four female anchors to a flat rigid template following the manufacturer’s recommendations. The Contractor shall lower the anchor assembly into fresh concrete foundation and vibrate into position such that the tops of the anchor washers are flush with the finished top surface of the foundation. The Contractor shall support the template such that all anchors are level and in their proper position. Slip base and hinge connection nuts of roadside sign structures shall be tightened using a torque wrench to the torque, following the procedure specified in the Plans.
8-21.3(9)F1 Shafts for Monotube Sign Bridge and Cantilever Sign Structure
Foundations Shafts for monotube sign bridge and cantilever sign structure foundations shall be constructed in accordance with Section 6-19.3 , except as follows: The tolerance for placing the center at the top of the shaft under Section 6-19.3(1)A is revised for sign bridge and cantilever sign structure shafts to be within four-inches of the Plan location. Non-destructive testing of shafts under Sections 6-19.3(1)B and 6-19.3(9) and associated Work under Section 6-19.3(6) does not apply. Temporary casing shall be advanced during excavation operations within the limits of temporary casing shown in the Plans for all shaft locations specified in the Special Provisions as requiring temporary casing. Excavation in advance of the casing tip shall not exceed 3-feet, except in no case shall shaft excavation and casing placement extend below the bottom of shaft excavation as shown in the Plans. Unless partial depth temporary casing is shown in the Plans, temporary casing shall be full depth of the shaft. When the rate of advance of the excavation to the design tip elevation is significantly reduced relative to previous rate of excavation advance in the same geological unit, M 41-10 Page 8-125 Permanent Signing 8-21then the Contractor shall remove, break-up, or push aside, the obstruction under the provisions of Section 8-21.5 . Slurry, if used, shall be synthetic slurry or water slurry as specified in Sections
9-36.2(2) and 9-36.2(3), respectively.
The concrete cover dimensions under Section 6-19.3(5)C are revised for sign bridge and cantilever sign structure shafts to be 3-inches minimum for shafts of diameters of 3-feet or less, and 4-inches minimum for shafts with diameters greater than 3-feet. Sign bridge and cantilever sign structure shaft concrete shall be Class 4000P. All temporary casing shall be completely removed.
8-21.3(9)G Sign Structure Identification Information
Whenever existing bridge-mounted sign brackets, cantilever sign structures, or sign bridge structures are removed from their anchorage, whether temporary or permanent, the Contractor shall provide the sign structure identification information, attached to the sign structures, to the Engineer. The identification information may be in the form of a riveted plate, sticker, or other means.
8-21.3(10) Sign Attachment
Sign panels consisting of sheet aluminum or fiberglass reinforced plastic shall be attached or mounted to signposts or sign structures as shown in the Plans. Signs not conforming to the above, including all variable message sign (VMS) assemblies and other message boardtype assemblies, shall be attached or mounted to signposts or sign structures by means of positive connections—defined as through-bolted connections. The use of clips or clamps to accomplish the attachment or mounting of such signs and assemblies is prohibited.
8-21.3(11) Multiple Panel Signs
After installation of multiple panel signs, the Contractor shall furnish and install an approved reinforced aluminized tape on the reverse side of the sign to prevent visible light through the seam. The tape shall be pressure sensitive and a minimum of 2 inches wide and 2 mils thick. In lieu of tape, the Contractor may use 1-inch-wide aluminum sheeting riveted to the sign back. The aluminum shall be a minimum of 0.032 inch thick. Rivet heads shall match the sign color area immediately surrounding the rivet head, with the exception that rivet heads in white colored sign areas shall be coated to match the white color or be uncoated rivet heads.
8-21.3(12) Steel Sign Posts
For roadside sign structures on Type TP-A or Type TP-B bases, the Contractor shall use the following procedures and manufacturer’s recommendations:
1.The couplings, special bolts, bracket bolts, and hinge connection nuts on all Type TP-A or Type TP-B bases shall be tightened using the Turn-of-Nut Tightening Method to a maximum rotation of ½ turn past snug tight.
2.The Contractor shall shim as necessary to plumb the steel signposts. For roadside sign structures on all Type PL and SB slip bases, the Contractor shall use the following procedures:
1.The Contractor shall assemble the steel signpost to stub post with bolts and flat washers as shown in the Plans.
2.Each bolt shall be tightened using a torque wrench to the torque, following the procedures specified in the Plans. For roadside sign structures on SB-1, SB-2, or SB-3 slip bases, the Contractor shall use the following procedures and manufacturer’s recommendations: Page 8-126 M 41-10
8-21 Permanent Signing1. The Contractor shall attach the perforated square steel post or solid square steel post
to the upper slip plate with bolts, nuts, and washers as shown in the Plans.
2.The three bolts connecting the upper and lower slip plates shall be tightened to torque, using a torque wrench, following the procedures in the Plans. For roadside structures on ST-2 and ST-4 sign supports, the Contractor shall use the following procedures:
1.The Contractor shall attach the perforated square steel post to the lower sign post support with bolts, nuts, and washers as shown in the Plans.
8-21.4 Measurement
Sign covering will be measured in square feet of the area of the sign covered.
8-21.5 Payment
Payment will be made for each of the following Bid items that are included in the Proposal: “Permanent Signing”, lump sum. “Sign Bridge No. ____”, lump sum. “Cantilever Sign Structure No. ____”, lump sum. All costs in connection with surveying completed concrete foundations for sign bridges and cantilever sign structures shall be included in the lump sum contract price for “Structure Surveying”, except that when no Bid item is included in the Proposal for “Structure Surveying” then such costs shall be included in the lump sum contract price(s) for “Sign Bridge No. ___” and “Cantilever Sign Structure No. ___”. “Bridge Mounted Sign Bracket No. ____”, lump sum. “Sign Covering”, per square foot. “Removing Sign Structure Shaft Obstructions”, estimated. Payment for removing obstructions, as defined in Section 8-21.3(9)F1 , will be made for the changes in shaft construction methods necessary to remove the obstruction. The Contractor and the Engineer shall evaluate the effort made and reach agreement on the equipment and employees utilized, and the number of hours involved for each. Once these cost items and their duration have been agreed upon, the payment amount will be determined using the rate and markup methods specified in Section 1-09.6 . For the purpose of providing a common Proposal for all bidders, the Contracting Agency has entered an amount for the item “Removing Sign Structure Shaft Obstructions” in the bid Proposal to become a part of the total bid by the Contractor. If the shaft construction equipment is idled as a result of the obstruction removal work and cannot be reasonably reassigned within the project, then standby payment for the idled equipment will be added to the payment calculations. If labor is idled as a result of the obstruction removal work and cannot be reasonably reassigned within the project, then all labor costs resulting from Contractor labor agreements and established Contractor policies will be added to the payment calculations. The Contractor shall perform the amount of obstruction work estimated by the Contracting Agency within the original time of the contract. The Engineer will consider a time adjustment and additional compensation for costs related to the extended duration of the shaft construction operations, provided:
1.the dollar amount estimated by the Contracting Agency has been exceeded, and
2.the Contractor shows that the obstruction removal work represents a delay to the completion of the project based on the current progress schedule provided in accordance with Section 1-08.3 .
Source: Washington Standard Specifications for Road, Bridge, and Municipal Construction, 2024 Edition. Pages 868–876 of 1,151.