ITEM 602 MASONRY
602.01 Description. This work consists of constructing headwalls, pipe cradles, collars, and
other brick and masonry units of the types and sizes specified. Use removed or excavated materials in the Work when the material conforms to the specifications; if not, then recycle or dispose of the material according to 105.16 and 105.17.
602.02 Materials. Furnish materials conforming to:
Backfill .................................................. 203 Concrete, Class QC1 ............... 499 and 511 Water for grout and mortar .............. 499.02 Reinforcing steel .............................. 509.02 Cement for mortar ... 701.01 through 701.07 Sand for mortar ................................ 703.03 Granular base ................ Granular material, ..................................... Type B, 703.16.C Brick and masonry units ..... 704.01, 704.02, 704.03 Nonshrink mortar ............................. 705.22 Lime for mortar. ............................... 712.04
602.03 Construction Requirements. Construct the designated items as shown on the plans.
A.Excavate to dimensions that provide ample room for construction. Remove obstructions as necessary to perform this work. Protect the sides of all excavations from caving by providing suitable sheeting, shoring, and bracing. Use excavation methods that do not disturb the original material below the bottom of footers or below the additional 6 inches (150 mm) required for precast structures. If the material found at the bottom of the headwall or below the additional 6 inches (150 mm) required for precast structures is not suitable for a foundation, excavate to further depth to provide a suitable foundation. Backfill the void left by the additional excavation with granular base. The Department will pay for this additional work according to 109.05. Backfilling shall follow completion of the work as closely as the construction will allow. Backfill with granular base or soil. Place backfill in 6-inch (150 mm) loose lifts.
B.Compaction requirements are according to Item 203 except for the following: Four passes per lift with additional passes as required until 95 percent compaction is reached. Use compaction equipment with a minimum total weight of, or minimum centrifugal force of, 1 ton (0.9 metric ton). Supply the manufacturer’s specifications for this equipment to verify these requirements.
D.Precast structures for half height headwalls are for circular conduits up to a maximum of 78 inches (1980mm) and elliptical and pipe arch conduits up to a maximum 78 inches (1980 mm) round equivalent. The shop drawings are kept on file at the certified pre cast facility per Supplemental 1073. Construct elliptical and pipe arch half height headwalls from templates of the actual conduit being supplied to the project to ensure the opening is outside diameter plus one inch. Ensure the precast structures and their shop drawings conform to the following additional requirements:
1.All manufacturers are pre-approved according to Supplement 1073.
2.All reinforcing steel will be epoxy coated.
3.All HW-2.1 SCD require wire insert details.
4.Attachment detail for metal or plastic conduit conforming to SCD HW-2.1.
5.Non-corrosive lifting devices.
6.Maximum opening is conduit outside diameter plus 1 inch (25 mm) for each conduit material type.
7.All openings to be filled with nonshrink mortar including all lifting device voids.
8.Changes in pre-approved drawings are the same as non pre-approved drawings.
9.Detail how the 6 inch (150 mm) extension is treated if required.
10.Fill the void between the precast half height headwall and the conduit by using nonshrink mortar.
11.Apply marking, either stamped or painted, to the headwall to ensure each headwall size is matched to the proper conduit size and material type.
E.Masonry units structures are headwalls, pipe cradles, collars, and other units. Thoroughly wet masonry units before laying the mortar. Lay masonry units with full mortar joints. Take adequate precautions to prevent the mortar from freezing. Do not set masonry uni ts having a temperature of 40 °F (4 °C) or less with mortar until heated. When required, heat to ensure that a temperature of 50 to 80 °F (10 to 27 °C) is obtained throughout the entire masonry units. Cure the exposed surfaces of the masonry units by covering with wet burlap for 48 hours or by applying curing membrane according to Item 511. Construct the masonry units structures according to the corresponding Standard Construction Drawing. Use one of the following mortars:
1.One part Portland cement to two parts sand by volume. The Contractor may add lime in an amount not to exceed 10 percent of the cement by weight
2.One part masonry cement to two parts sand by volume.
602.04 Method of Measurement. The Department will measure Brick Masonry, Block
Masonry, and Concrete Masonry by the number of cubic yards (cubic meters) calculated from dimensions shown on the plans.
602.05 Basis of Payment. When a precast structure is used, payment is based on the number of
cubic yards (cubic meters) required for the cast in place item and is considered full compensation for construction of the precast structure. The Department will pay for accepted quantities at the contract prices as follows: Item Unit Description 602 Cubic Yard Brick Masonry (Cubic Meter) 602 Cubic Yard Block Masonry (Cubic Meter) 602 Cubic Yard Concrete Masonry (Cubic Meter) ITEM 603 MAILBOX SUPPORTS
603.01 Description. This work consists of furnishing and erecting mailbox supports with
associated mounting hardware, and attaching an owner-supplied mailbox. Coordinate the timing of the movement of any mailbox to a new location with the local postmaster.
603.02 Materials. Furnish materials conforming to:
Galvanizing ...................................... 711.02 Wood Posts ..................................... 711.26 Steel Posts ........................................ 730.01 Furnish suitable natural soil conforming to 203.03 and 703.16.
603.03 Posts and Hardware. Install square wood posts that are a nominal 4” by 4” or round
wood posts with a diameter of 4”. Install steel or aluminum pipe posts that are 1 1/2” to 2” in diameter. Other mailbox support posts that meet MASH 2016 TL-3 criteria may be substituted. Support hardware shall accommodate either a single or double mailbox installation. Set or drive posts plumb in a manner that prevents battering or distorting the posts. Do not encase posts in concrete. Backfill posts with suitable natural soil and compact thoroughly. Galvanize steel posts, bolts, nuts, washers, spacers, plates, fasteners, and any other necessary hardware per 711.02.
603.04 Mailbox. In the absence of a new mailbox supplied by the owner, carefully salvage the
existing mailbox. Furnish all necessary attachment hardware and secure the new or salvaged mailbox to the new support. Exercise due care when handing the mailbox, and repair or r eplace any mailbox that is damaged during the operation, as directed by the Engineer.
603.05 Method of Measurement. The Department will measure Mailbox Support of the type
specified (single or double) by the number of each assembly furnished and erected complete. The Department will measure Mailbox Support, Removed and Reset by the number of each unit removed and reinstalled.
603.06 Basis of Payment.
The Department will pay for accepted quantities at the contract prices as follows: Item Unit Description 603 Each Mailbox Support, Single 603 Each Mailbox Support, Double 603 Each Mailbox Support, Removed and Reset
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Source: Construction and Material Specifications, 2023 (rev. 7/17/2026) Edition. Pages 448–451 of 892. View official source ↗