1089PA BRIDGE BARRIER

1089.1DESCRIPTION—This work is the construction of a PA Bridge Barrier.

1089.2MATERIAL—Unless otherwise specified, galvanize steel materials as specified in Section 1105.02(s).

Before fabrication, submit shop drawings as specified in Section 105.02(d) for review and acceptance.

• Steel Cold Formed Tubes. ASTM A500, Grade B

• Threaded Welded Anchor Studs for Barrier Rail Tube. ASTM A108

• No Thread Welded Anchor Studs for Barrier Rail Splice. ASTM A108

• Sidewalk Rail Tubes. Section 1022.2(a)

• Threaded Welded Anchor Studs for Sidewalk Rail Tube. ASTM A108

• Sidewalk Rail Rod. Section 1105.02(a)2

• Sidewalk Rail Rod Splice. ASTM A513 or A519

• Railing Posts. ASTM A709, Grade 50 or ASTM A992

• Base Plates. ASTM A709, Grade 50

• Test Requirements for Post Welds. All welds on all posts will be visually inspected. In addition, at least 10% of the posts in a lot as defined in AWS D1.5/D1.5M-2008, Section 6.7.1.2(2)(c), will be inspected as follows: Magnetic particle testing will be performed over the full length of the welds on all posts inspected. Ultrasonic testing of the complete joint penetration welds will also be performed. If unacceptable discontinuities are found in more than 20% of the welds tested, an additional 10% of the posts in the same lot will be inspected. If unacceptable discontinuities are found in more than 20% of the welds tested in the second group of posts, all of the remaining posts in the lot will be inspected.

• Welding Material. Section 1105.02(t)

• Miscellaneous. Section 1105.02(a)2

Certify as specified in Section 106.03(b)3.

1089.3CONSTRUCTION—As shown on the Standard Drawings, the Contract Drawings, and as follows:

erection. Use caulking compound to seal openings between metal surfaces and concrete after erection and alignment. Remove blemishes and scratches from exposed surfaces. For areas that have been damaged, exposing base metal, repair galvanizing according to ASTM A780. Place joints, as indicated. At bend area, do not vary the diameter of rail tubes by more than 5% of the outside dimension when rail tubes are bent to the radii indicated. Do not open bridge to traffic until bridge railing is placed.

1089.4MEASUREMENT AND PAYMENT—Linear Foot, measured from end to end of barrier.

Caulking compound as specified in Section 705.7 is incidental.