6-52 SECTIO N 616 – CURB S AND GUTTERS 616.0 1 DESCRIPTION . This work shall consist of the construction, resetting, or removal of curbs and gutters. 616.0 2 MATERIALS . Materials shall meet the requirements of the following subsection s: Performance -Graded Asphalt Binder ................................ ................................ ......... 702.01 Emulsified Asphalt ................................ ................................ ................................ .....702.02 Sand Borrow and Cushion ................................ ................................ ......................... 703.03 Mortar, Type I ................................ ................................ ................................ ............ 707.01 (b) Mortar, Type IV ................................ ................................ ................................ ......... 707.0 1(e) Joint Sealer, Hot Poured ................................ ................................ ............................ 707.0 2(a) Preformed Joint Filler, Cork , and Asphalt -Treated Felt ................................ ............ 707.0 6 Preformed Joint Filler, Bituminous Type ................................ ................................ ..707.1 2(a) Bituminous Concrete Mixtures ................................ ................................ ................ 716.02 Bituminous Mixing Plant and Laboratory ................................ ................................ .716.03 Preparing and Mixing Bituminous Concrete Mixtures ................................ .............. 716.04 Timber Preservative ................................ ................................ ................................ ...726.01 Vertical Granite Curb ................................ ................................ ................................ .729.01 Granite Slope Edging ................................ ................................ ................................ .729.0 2 Precast Reinforced Concrete Curb ................................ ................................ ............. 729.0 3 Bituminous Concrete Curb ................................ ................................ ........................ 729.0 4 Treated Timber Curb ................................ ................................ ................................ ..729.0 5 All cast -in-place concrete for curbing and gutters shall conform to the r equirements of Section 541 for Concrete, Class B. There shall be a mineral admixture substitution for Portland cement of 20% fly ash or 25% ground granulated blast -furnace slag (GGBFS ). 616.0 3 GRANIT E CURBIN G AND SLOP E EDGING .
a.Excavation . Excavation shall be made to the required depth . The base material on which the curb is to be set shall be compacted to a firm, even surface . All soft and unsuitable material shall be removed and replaced with suitable material that shall be thoroughly compacted.
b.Installation . Shall be installed in conformance with the line and grade shown on the Plans . All space u nder the curbing shall be filled and thoroughly tamped with material meeting the requirements of the material for the bed course. 6-53 (c) Joints . The curb and slope edging shall be laid and fitted so there will be no open joints exceeding 1 inch between stones . Joints between stones shall be carefully filled with Type I mortar and neatly pointed on the top and exposed front portions . After pointing, the stone shall b e satisfactorily cleaned of all excess mortar and the joints kept moist until the mortar has set.
d.Backfilling . After the joints have set, any remaining excavated areas shall be filled and tamped with approved material placed in layers not exceeding 6 i nches in depth. 616.0 4 REPOINTIN G GRANIT E BRIDG E CURB . The existing mortar bed and vertical curb joints shall be repointed as shown on the Plans . Mortar shall meet the requirements of Subsection 707.01 (b). 616.0 5 CAST -IN-PLAC E CONCRET E CURB .
a.Excavation . Excavation and bedding shall conform to the requirements of Subsection 616.03(a) .
b.Forms . Forms shall be made of wood or metal, straight or curved as required, free from warp and shall be in accordance with Subsection 541.0 8. Form construction shall b e such that there will be no interference to the inspection of grade or alignment. All forms shall extend for the entire depth of the curb and shall be braced and secured sufficiently so that no deflection from alignment or grade will occur during the plac ing of the concrete.
c.Mixing and Placing . Compaction of concrete placed in the forms shall be by spading or other approved methods. Forms shall be left in place for 24 hours or until the concrete has set sufficiently so that they can be removed without injury to the curbing. Upon removal of the forms, the exposed curbing face shall be finished in accordance with Subsection 541.1 4(a).
d.Sections . Curbing shall be constructed in sections having a uniform length of 10 feet, unless otherwise specified. Sec tions shall be separated by open joints 1/8 inch wide except at expansion joints.
e.Expansion Joints . Expansion joints shall be formed using a preformed joint filler having a thickness of 1/4 inch. They shall be constructed at 20 f oot intervals or as directed by the Engineer.
f.Curing . Curbs shall be cured in accordance with Subsection 541.1 5.
g.Backfilling . After the concrete has set sufficiently, the spaces in front and back of the curb shall be filled to the required elevation with layers of not more than 6 inches of the same material as the bedding and thoroughly tamped.
h.Curb Machine . With the approval of the Engineer, the curb may be constructed by a curb -forming machine. 6-54 616.0 6 PRECAS T CONCRET E CURB .
a.Excavation . Excavation and bedding shall conform to the requirements of Subsection 616.03(a) .
b.Installation . Precast concrete curb shall be installed in accordance with Subsection 616.03(b) .
c.Joints . The curb sections shall be placed and fitted so that there will be no open joints between them exceeding 1/8 inch in width. Unless otherwise shown on the Plans or directed by the Engineer, expansion joints shall be placed every 20 feet. Expansion joints sh all be filled with preformed joint filler having a thickness of 1/4 inch. Joints in the curb at concrete deck joints shall be treated as shown on the Plans. The Contractor shall protect the curb against damage or discoloration of the exposed surfaces until completion of the Contract.
d.Backfilling . The space in front and back of the curb shall be filled and compacted in layers not exceeding 6 inches with the same material as the bedding, unless otherwise specified. 616.0 7 BITUMINOU S CONCRET E CURB .
a.General Requirements . The bituminous concrete curb mixture shall conform with the requirements of Section 729 . The plant and equipment necessary for this work shall be in conformance with the requirements of Section 716 and Section 406 .
b.Preparation of Bed . The bituminous concrete curb shall be placed on bituminous concrete pavement or another hard surface. The surface shall be thoroughly cleaned of all dirt, dust, sand, or other loose material and treated with a rapid setting emulsified asphalt tack coat a pplied at a rate of 0.05 to 0.10 gallons per square yard prior to placing the curb. All exposed surfaces not to be treated shall be protected against spattering of the bituminous material .
c.Placing . After the tack coat has cured and become tacky, the mi x for the curb shall be placed with an automatic bituminous concrete curb laying machine approved by the Engineer. The machine shall form curbing that is uniform in texture, shape, and density. The Engineer may permit the construction of curbing by means o ther than the automatic curber or machine, when short sections or sections with short radii are required, or for such other reasons as may be warranted. The resulting curbing shall conform in all respects to the curbing produced using the machine.
d.Sealing. After the curb has been in place for 7 calendar day s, the exposed surface shall be treated with two coats of emulsified asphalt. 6-55 616.0 8 TREATE D TIMBE R CURB . The treated timber, bituminous fillet, and granular material behind the curb shall be installed as shown on the Plans. The fillet shall be sealed as specified in Subsection 616.0 7(d).
616.09 Removin G and Resettin G Curb .
a.Salvage of Curbing . The Contra ctor shall carefully remove, store, and clean any curbing specified for resetting. Any existing curbing to be reset that is lost, damaged, or destroyed as a result of the Contractor’s operations, or failure to store and protect it in a manner that would prevent its loss or damage, shall be replaced at the Contractor’s expense.
b.Placing . Excav ation, setting joints, and backfilling shall be in accordance with specification s for the type of curb being removed and reset.
c.Cutting and Fitting . Cutting, fitting, or dressing may be necessary to install the curbing at the locations directed.
d.Joints. All sections shall be placed so that the maximum opening between sections is not more than 1 inch wide for the entire top and face. Any dressing of the ends of the curbing necessary to meet this requirement shall be done by the Contractor. Joints sh all be filled completely with mortar and kept moist until the mortar has been set.
e.Backfilling . After the joints have set, any remaining excavated areas shall be filled and tamped with approved material placed in layers not exceeding 6 inches in depth. 616.1 0 REMOVA L OF EXISTIN G CURB . The Contractor shall remove existing curb at the locations shown on the Plans or as directed by the Engineer . When shown in the Contract that the curb will remain the property of the state or municipality, the Contractor shall exercise care to avoid damage to the curb during removal . Salvaged curb shall be carefully and neatly stacked with wooden spacers at locations specified in the Contr act or as directed by the Engineer. 616.1 1 BITUMINOU S CONCRET E GUTTER S AND TRAFFI C ISLANDS .
a.General Requirements . The bituminous concrete mixture shall meet the requirements of Subsection 716.02 for Type IVS bituminous concrete pavement unless otherwise specified on the Plans. The plant and equipment necessary for this work shall be in conformance with the requirements of Section 716 and Section 406 . 6-56 (b) Preparation of Bed . The bed upon which the bituminous concrete surface is to be placed shall be thoroughly compacted to the lines, grades, and shape shown on the Plans or directed by the Engineer . In the case of gutters, all soft, yielding, or unsuitable material below the bed shall be removed and replaced with suitable material and compacted to a firm, smooth surface.
c.Construction . The bituminous concrete shall be placed as shown on the Plans . Each course shall be rolled with a roller weighing at least 150 pounds. The finished gutter shall be smooth, uniform in appearance, and free from irregularities. 616.1 2 METHO D OF MEASUREMENT . The quantities of Granite Slope Edging; Vertical Granite Curb; Vertical Granite Curb, Mountable; Precast Reinforced Concrete Curb of the type specified; Cast - In-Place Concrete Curb of the type specified; Bituminous Concrete Curb of the type specified; Treated Timber Curb; and Removing and Resetting Curb to be measured for payment will be the number of linear feet installed in the complete and accepted work , as determined along the face of the finished curb. The quantity of Repointing Granite Bridge Curb to be measured for payment will be the number of gallons of mortar applied in the completed and accepted work , measured to the nearest gallon. The quantities of Bituminous Concrete Gutte rs and Traffic Islands to be measured for payment will be the number of tons installed in the complete and accepted work , as determined from the load ticket s. The quantity of Removal of Existing Curb to be measured for payment will be the number of linear feet removed in the complete and accepted work , measured along the face of the curb in its original position. 616.1 3 BASIS OF PAYMENT . The accepted quantities of Granite Slope Edging; Vertical Granite Curb; Vertical Granite Curb, Mountable ; Precast Reinfo rced Concrete Curb of the type specified; Cast -In-Place Concrete Curb of the type specified; Bituminous Concrete Curb of the type specified; Treated Timber Curb; Removing and Resetting Curb; and Removal of Existing Curb will be paid for at the Contract unit price per linear foot of curb placed, removed, or removed and reset. The accepted quantity of Repointing Granite Bridge Curb will be paid for at the Contract unit price per gallon . The accepted quantities of Bituminous Concrete Gutters and Traffic Islan ds will be paid for at the Contract unit price per ton. 6-57 Payment will be full compensation for furnishing, transporting, handling, and placing the specified material s, including all excavation, providing, placing and compacting backfill material when not otherwise specified, mortar for the bed and joints of curb s, joint material for curbs and gutters, anchors for bridge curbs, cleaning, cutting, fitting, dressing or stockpiling of curb, and for furnishing all labor, tools, equipment , and incidentals necessary to complete the work . Tack, prime, or seal coats of bi tuminous material required for the construction of Bituminous Concrete Curb of the type specified and Treated Timber Curb will not be paid for separately but will be considered incidental to the Contract unit price for the specific item. The bituminous fil let shown on the Plans to be placed in front of timber curb will not be paid for separately but will be considered incidental to the Contract unit price for Treated Timber Curb. The removal of treated timber curbing, including the bituminous concrete fille t, from installations where the existing guardrail is removed will not be paid for separately but will be considered incidental to Removing and Resetting Guardrail or Removal and Disposal of Guardrail, as appropriate. When shown on the Plans, concrete radius curb installed in conjunction with vertical granite curb will be measured and paid for as Vertical Granite Curb. Foundation material s for Bituminous Concrete Gutters and Traffic Islands will be paid for separately as specified in the Contract. Payment will be made under: Pay Item Pay Unit
616.20 00 Granite Slope Edging ................................ ................................ ................ Linear Foot
616.21 00 Vertical Granite Curb ................................ ................................ ................ Linear Foot
616.2 150 Vertical Granite Curb , Mountable ................................ ............................ Linear Foot 616.225 0 Repointing Granite Bridge Curb ................................ ............................... Gallon
616.25 01 Precast Reinforced Concrete Curb, Type A ................................ .............. Linear Foot
616.2 502 Precast Reinforced Concrete Curb, Type B ................................ .............. Linear Foot
616.27 01 Cast-In-Place Concrete Curb, Type A ................................ ...................... Linear Foot
616.2 702 Cast-In-Place Concrete Curb, Type B ................................ ...................... Linear Foot 616.3 101 Bituminous Concrete Curb, Type A ................................ ......................... Linear Foot
616.31 02 Bituminous Concrete Curb, Type B ................................ .......................... Linear Foot
616.35 00 Treated Timber Curb ................................ ................................ ................. Linear Foot
616.40 00 Removing and Resetting Curb ................................ ................................ ..Linear Foot
616.41 00 Removal of Existing Curb ................................ ................................ ........ Linear Foot
616.47 00 Bituminous Concrete Gutters and Traffic Islands ................................ ....Ton
6-58 SECTIO N 617 – MAILBOXES 617.0 1 DESCRIPTION . This work shall consist of the removal and relocation of existing mailbox installations to permanent locations, or the removal of existing mailbox installations and replacement with new installations in permanent locations. The work shall include the replacement of any non -conforming mailboxes, supports, or attachment hardware. 617.0 2 MATERIALS . Materials shall meet the requirements of the following subsections: Timber Preservative ................................ ................................ ................................ ...726.01 Wood Posts ................................ ................................ ................................ ................ 750.01( b) Brackets and platforms shall be made of galvanized steel sheets. Holes shall be neatly punched or drilled. Fasteners shall be galvanized in accordance with Subsection 726.0 6 and meet the requirements of ASTM A307 . New mailboxes shall meet the approval of the U.S. Postal Service. 617.0 3 GENERAL REQUIREMENTS . Mailbox installations designated to be removed and reset shall be carefully removed and reinstalled as shown on the Plans. Any minor components (such as hardware, brackets, or lettering) of the existing installation that are missing, damaged, or become dam aged during construction shall be replaced with new materials. Materials not reused shall remain the property of the owner. Mailbox installations designated to be replaced shall be carefully removed. The removed materials shall remain the property of the owner. New mailbox installations shall be constructed and installed as shown on the Plans. It is the Contractor’s responsibility to ensure that each completed relocation has the approval of the mail carrier. 617.0 4 RELOCATION . Posts may be set in holes o r they may be driven if the posts or any attached anti - twist devices are not damaged. The installed posts shall be plumb and placed to the depth shown on the Plans. The space around the posts set in holes shall be backfilled with suitable granular material in 6 inch layers. The backfill material shall be thoroughly tamped. Mailboxes shall be attached to the posts using either the existing mountings and hardware, or the mountings and hardware shown on the Plans. All fasteners shall be drawn sufficiently tigh t to ensure that the mailboxes do not pivot or otherwise move.
Source: Vermont Standard Specifications for Construction, 2024 Edition. Pages 826–831 of 1,380.