AASHTO S2.1 pdf free download

AASHTO S2.1 pdf free download.Steel Bridge Fabrication Guide Specification.
2.1 FABRICATOR CERTIFICATION
2.1.1
Certification from the AISC Quality Certification Program is required for Fabricators to the standard appropriate for the type of work to be performed. The standards include:
• Al SC 205. A ISC certiflcaiioii Program fr Structural Steel Fabricators—Standard for Steel Bridges —requ i red for vehicular steel bridge superstructures
• AISC 420/SSPC-QP 3, certi/ication Standard for Shop Application of complex Protective coating Svstems—required for any shop painting perlbrmed on steel bridges
The base level of certification to AISC 205 is for simple bridges, which consist of unspliced rolled sections. The following supplements to AISC 205 are also required:
• Fracture Critical Endorsement—required for any fabrication conducted on fracture-critical members (FC M s)
• Intermediate Bridges—required for bridges in the following categories:
I) rolled beam bridges with field or shop splices. either straight or with a radius over 500 if;
2) built-up 1-shaped plate girder bridges with constant web depth (except for dapped ends), with or without splices, either straight or with a radius over 500 if;
3) a built-up 1-shaped plate girder with variable web depth (e.g., haunched), either straight or with a radius over 1000 II; or
4) other bridges determined by the Owner to require a similar level of skill as categories (I)—(3).
• Adi’anced Bridges—bridges that do not fall under the definition of simple or intermediate bridges.
Certification is intended to help ensure that the Fabricator has the needed expertise and commitment to quality to achieve a successful project.
Coating certification is addressed in S8.l, the Collaboration’s guide specification for coatings. The requirements of Collaboration standards S2.l and S4.I are intended to work in conjunction with quality control requirements in the A1SC Quality Certification Program.
The Owner is advised not to require certification endorsements for categories of a higher complexity than the structure warrants. The AISC endorsement requirements have been written to be pertinent to specific structure types and may not be relevant for simpler bridges.
An example of what might he designated an intermediate bridge that does not meet the typical categories (l)-(3) listed in Section 2.1.1 would be a prcfahricated” truss bridge, which would he entirely or substantially pre-assembled at the certified facility and shipped in only a few sub-assemblies. Because most of the connections are made in the shop and not the field. the geometric control required to ensure fit of field connections is not as rigorous as a truss bridge fully assembled in the field. Furthermore, most fabricators of prefiibricated” truss bridges produce only this sort of bridge, and thus would not be able to qualify for the advanced bridge endorsement by fulfilling the prerequisite of producing an intermediate bridge.
Examples of typical advanced bridges include tub or trapezoidal box girders, closed box girders. large or nonprcassernblcd trusses, arches. bascule bridges, cablesupported bridges. moveahie bridges, and bridges with particularly tight curve radius.
The Owner should also consider accepting the Certification Program for Bridge and Highway Metal Component Manufacturers for the fabrication of non- main-member components such as cross frames for straight non-skewed bridges or other bracing subassemblies.
More infbrmation, including a list of all AISCcertified fabricators, is available from the AISC website at http://www.aisc.org.
Information about the SSPC certitication program is available from the SSPC website, http://www.sspc.org.AASHTO S2.1 pdf download.