Pennsylvania Publication 408 — Specifications — Section 628

677.1 677.4

677.1DESCRIPTION —This work is the furnishing and placing of selected material on a prepared area.

677.2MATERIAL —Section 703.3

677.3CONSTRUCTION —Uniformly spread aggregate upon the prepared areas, in loose layers not

exceeding 5 inches in depth, without segregation of coarse and fine material. Compact with a roller as specified in Section 108.05(c)3.a or 3.b. Satisfactory compaction will be determined by the stability of the material under the specified compaction equipment. If material used does not contain sufficient fines to properly lock under the roller, add additional fines of the same material, or limest one fines, as necessary, to obtain the compaction and stability.

677.4MEASUREMENT AND PAYMENT —Cubic Yard or Ton .

Excavation, grading , and scarifying are incidental.

678.1 678.2(h)

678.1DESCRIPTION —This work is construction of permanent barricades.

678.2MATERIAL —As shown on the Standard Drawings and as follows:

(a)Posts.

1.Wood Posts. No. 1 stress -rated Southern Pine; No. 1 Douglas Fir; Larch; select, structural Hem -Fir;

Mountain Hemlock; Western Hemlock; or sound square edge Red Oaks; seasoned before treatment as required by AWPA or AWPB Standards; and pressure treated according to AWPA and AWPB Standards and as follows:

Treatment (Species except Red Oaks) Retention (pounds per cubic foot) Ammoniacal Copper Arsenite

(ACA)0.60

Pentachlorophenol 0.60 Chromated Copper Arsenate

(CCA)Types A, B, or C 0.60

(Red Oaks) Pentachlorophenol 0.30

Certify as specified in Section 106.03(b)3. A tolerance of 1/2 inch scant from nominal dimensions is required for the size of posts. Do not use posts that, for any reason, prevent attachment of guide rail fittings or alignment with other posts. Throughout the project, use posts treated with the same type of preservative.

2.Steel Posts. Section 1109

(b)Wood Planks. Seasoned No. 1, structural grade, Long Leaf Yellow Pine; or select, structural grade,

Douglas Fir; pressure treated as specified. Certify as specified in Section 106.03(b)3.

(c)Class A Cement Concrete. Section 704

(d)Extruded Aluminum Channel. Section 1103.02(a). The Contractor may use an alternate channel

section, of equal or greater section modulus, with suitable dimensions to utilize the mounting hardware. Certify as specified in Section 106.03(b)3.

(e)Aluminum Blanks (for Wood Barricade Panels). Section 1103.04(a), Alloy 6061 -T6. Certify as

specified in Section 106.03(b)3.

(f)Reflective Sheeting. Section 1103.04(c), Certify as specified in Section 106.03(b)3.

(g)Miscellaneous Material.

• Aluminum Hardware Items . Section 1103.11

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 598–602 of 1,522.

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627 TEMPORARY BARRIER

629 HIGH-TENSION CABLE BARRIER SYSTEM