96M09/22/06

S555-96M.doc

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  When steel structures are required include Section 562 and the
  following:

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**Section 555. -- STEEL STRUCTURES**

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| Note: AISC Quality Certification Program identifies two categories    |
| related to bridge fabrication:                                        |
|                                                                       |
| > • Sbr (Simple Steel Bridges): Includes highway sign structures,     |
| > parts for bridges (such as cross frames), unspliced rolled beam     |
| > bridges.                                                            |
| >                                                                     |
| > • Cbr (Major Steel Bridges): All bridge structures other than       |
| > unspliced rolled beam bridges.                                      |
|                                                                       |
| **Insert category as required.**                                      |
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**555.03 General.** [Delete the text of the first sentence of the first
paragraph and substitute the following]{.underline}:

Fabricate the structural steel in a fabricating plant that is certified
in [\[INSERT CATEGORY: Sbr (Simple Steel Bridges) OR Cbr (Major Steel
Bridges)\]]{.mark}, under the AISC Quality Certification Program.

**555.06 Drawings (Shop Drawings, Erection Drawings, and Transportation
Drawings).**

**(b) Erection drawings.** [Delete the last sentence and substitute the
following:]{.underline}

See Section 562 for additional requirements.

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| Note: AISC Quality Certification Program identifies two categories    |
| related to bridge fabrication:                                        |
|                                                                       |
| > • CSE (Certified Steel Erector): simple non-continuous bridges      |
| >                                                                     |
| > • CASE (Certified Advanced Steel Erector): major bridges,           |
| > continuous girder bridges, railroad bridges, truss bridges.         |
|                                                                       |
| **Insert category as required.**                                      |
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**555.19 Erection.** [Add the following]{.underline}:

Erect steel according to category [\[INSERT CATEGORY: CSE (Certified
Steel Erector) OR CASE (Certified Advanced Steel Erector)\]]{.mark}
under the AISC Quality Certification Program.

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  Include the following when work is required in this Section.

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**555.21.** [Delete the second paragraph and substitute the
following]{.underline}:

Measure structural steel computed according to the AASHTO Standard
Specifications for Highway Bridges. Include all metal items incidental
to the structure and required by the contract such as castings, steel
plates, anchor bolts and nuts, pins and nuts, expansion dams, roadway
drains and scuppers, weld metal, bolts embedded in concrete, cradles and
brackets, posts, conduits and ducts, and structural shapes.