MAILBOXES 629.02 601 Include the cost of the following to be included in the contract unit price for High -Tension Cable Barrier (TL-3) or High -Tension Cable Barrier (TL -4): Anchor bolts, Nuts, Washers, Ground rod, Socket or sleeve, Excavation, Backfilling, Caps, and Other incidental work necessary to construct the cable barrier system. The Department will pay for Class AA concrete used in the construction of concrete anchor units and foundations in accordance with Section 509, “Structural Concrete.”
629.01 Description
This work consists of placing mailboxes on public rights -of-way within the roadway "Clear Zone ," as defined by the AASHTO Roadside Design Guide , to ensure public safety and safe access for mail delivery and retrieval. Refer to the Plans for a summary of the various sizes, types, quantities, and locations of mailboxes.
629.02 Materials
A.Mailboxes Provide mailboxes made of light metal or formed thermoplastic in accordance with United States Postal Service (USPS) requirements. Provide mailboxes with dimensions, nomenclature, and marking in accordance with AASHTO, “A Guide for Erecting Mailboxes on Highways,” Appendix C. Property owners are responsible for providing newspaper tubes of the appropriate material and dimensions, and placing names on mailboxes.
B.Post Systems
1.Wood Post Provide a support post system consisting of a 4 in × 4 in [100 mm × 100 mm] nominal wood post capable of withstanding the elements and soil -borne attacks (treated or untreated.) The Resident Engineer will allow th e post to be smooth and square, or rough sawn. Ensure that surface splintering is not hazardous. The Department will allow a natural, oiled, or painted surface finish.
629.04 Mailboxes
602 The Resident Engineer will allow an alternative wood post with a 4½ in [114 mm] nomina l diameter, treated or untreated, and capable of withstanding the elements and soil -borne attacks. Remove bark and, if finishing the surface, use oil or paint.
2.Metal Posts Provide metal posts (e.g. steel pipe, cold rolled shape, hot rolled member) wit h strength in bending equal to or less than a standard weight steel pipe (Schedule 40) with a nominal diameter of 2 in [50 mm]. Use the following equation to calculate: N NTYS SM YS SM 40 40 Where 40SM = Section Modulus of Schedule 40, 2 in [50 mm] steel pipe, 40YS = Yield Strength of Schedule 40, 2 in [50 mm] steel pipe (36,000 psi [250 MPa], NSM = Section Modulus of new post system, and NTYS = Tested Yield Strength of new post syst em. The Department will allow round or square, aluminum or aluminized steel tubing if the section is capable of supporting the mailbox array and withstanding lateral loads caused by mail and paper delivery and retrieval. The Contractor may use commercially available metal post systems integrating a mailbox support arm for one to five mailboxes. Provide patented materials in accordance with Subsection 107.03, “Patented Devices, Materials, and Processes.”
3.Post -to-Box Attachment Provide post -to-box attachment fittings capable of preventing separation of the mailbox from the post if the installation is struck by an automobile or light truck.
4.Basis of Acceptance Provide Type D certification for the basis of acceptance of materials. The Resident Engineer will provide visual inspection.
629.03 Equipment — Vacant
629.04 Construction Methods
A.General Provide mailbox designs capable of withstanding wind loads, lateral loads, or both. If the Resident Engineer approves, u se a concrete footing or a footing of native soil mixed with cementitious material to ensure the posts remain upright. Do not exceed the dimensions or strength criteria for specified posts in accordance with Subsection 629.02, “Materials.” If directed by the Resident Engineer, provide weakened plane joints for posts at the ground surface to guarantee bending or failure during vehicular impact. MAILBOXES 629.05 603 Accepted post designs include use of a concrete footing or installation of the posts through an asphalt or portland cement concrete surface. Embed the posts no deeper than 2 ft [0.6 m], or to the depth recommended by the manufacturer or supplier. If using a metal post system with an anti -twist device, embed no deeper than 10 in [250 mm] into the ground. Mailboxes placed on public right -of-way are privately owned. Coordinate with mailbox owners and USPS to ensure that owners receive mail deliveries during construction. Allow mailbox owners to claim salvageable items from exis ting mailbox installations for the duration of the Contract, not to exceed a maximum of 60 days. Mount no more than two mailboxes on a single -post support system, unless otherwise approved by the Resident Engineer. Mount newspaper receiver tubes below the mailbox, or on the post under the mailbox. If using alternate -design mailbox support system (not included in the Contract or on standard drawings), obtain Department -approval before installing. The Department will not approve (under any circumstances) ri gid, massive, or unyielding mailbox support systems or housings that may cause heavy damage to impacting vehicles, or cause severe injury or death. Install support systems using a cantilever arm to maximize the post offset where terrain allows.
B.Placemen t Place mailboxes at locations where access is allowed by law. Never place mailboxes with access from the through lanes of a freeway or at other prohibited locations. Horizontally space single -post support systems by at least three -quarters of the expose d height of the post, including the mailbox. Place mailboxes on the right -hand side of the road in the direction of the delivery route. On one - way streets, the Department will allow mailboxes installed on the left -hand side of the road. Set the bottom of the box at the elevation specified by USPS, from 3 ft to 4 ft [0.9 m to 1.2 m] above the roadway. Offset the face of the mailbox from the edge of the traveled way as shown on the Plans. On residential streets and rural roads, adjust the lateral placemen t and clearance of mailbox systems as directed by the Resident Engineer. Place mailboxes at driveways on the near side in the direction of the delivery route. Place mailboxes located at intersecting and through roads as shown on the Plans.
629.05 Method of Measurement
The Resident Engineer will measure mailbox installations as single (one mailbox per support system) or multiple (two or more mailboxes per support system). The Resident Engineer will measure each existing mailbox within the Project limits affe cted by the construction as Removal of a Mailbox Installation or Remove and Reset Mailbox .
640.02 Field Office Or Laboratory
604 629.06 BASIS OF PAYMENT The Department will pay for each pay item at the contract unit price per the specified pay unit as follows: Pay Item: Pay Unit:
A.MAILBO X INSTALLATION -SINGLE Each
B.MAILBOX INSTALLATION -MULTIPLE Each
C.REMOVAL OF MAILBOX INSTALLATION Each
D.REMOVE AND RESET MAILBOX Each Include the cost of removing, storing, and reconstructing the mailbox installation, including the serviceable, crashworthy support system and the mailbox in the contract unit price for Remove and Reset Mailbox . Include the cost of installing owner -provide d newspaper tubes to be included in the contract unit price for the relevant pay items. The Department will pay for base and surfacing for all -weather turnouts in accordance with the appropriate sections of Chapter 300, "Base s," and Chapter 400, "General Requirements for Surfaces." SECTION 640 FIELD OFFICE OR LABORATORY
640.01 Description
This work consists of providing a field office on the proj ect and a laboratory building at asphalt or ready -mixed concrete plants, for the independent and exclusive use of Department personnel for the duration of the Project.
640.02 Materials
The Resident Engineer will direct a time and location for the installa tion of the field office or laboratory. Provide a mobile unit or a permanent structure for the field office or laboratory building. Weatherproof and maintain the buildings as approved by the Resident Engineer. Provide buildings with the following characte ristics: Outside dimensions of at least 8 ft × 16 ft [2.4 m × 4.8 m]; Inside ceiling height of at least 7 ft [2.1 m]; Floors; At least four windows that can be opened, closed, and locked; and Two doors near opposite ends of the building that can be locked.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 615–617 of 935.