1、Division II CONSTRUCTION INTRODUCTION This Division of the Standard Specjications for High- way Bridges includes the basic technical consruction spec- ifications needed for the construction of bridges and other major transportation structures. They generally represent current practices in the United
2、 States and are consistent with the AASHTO Design Specifications for Bridges which are contained in Division I. They are provided to be used either as part of the specifications for projects or as a guide for agencies in developing their own standards. When so used, uniformity and the efficiencies a
3、ssociated therewith may be realized. These technical specifications do not include the clauses needed for the administration of a contract and were written to be used in conjunction with general pro- visions such as those in the AASHTO Guide Specjica- tions for Highway Construction. Other comparable
4、 sets of general provision clauses currently in use by many States can also be used to cover the administration requirements for construction contracts. The Guide Specifications and these Standard Specifications are intended to be comple- mentary and to provide for the principal and most widely used
5、 items of work required for the construction of major transportation structures. Note that these specifications do not identify the date of specifications, which are included by reference, such as the AASHTO Standard Specjica- tions for Transportation Materials and Methods of Testing and Sampling. A
6、s required by the AASHTO Guide Spec- ification, the edition of such specifications incorporated by reference will be the edition in effect on the date of ad- vertisement for proposals for the project. Sufficient detail may not be included in these specifi- cations to suit local or unusual conditions
7、 or unique de- signs. The many differences in climate, geology, customs, statutes and regulations prevent the writing of a more de- tailed national construction specification. Therefore, the user is expected to supplement or alter the requirements of these specifications, as needed, in the project special provisions. A Commentary is provided to assist the user in developing such special provisions. These specifications were extensively revised under NCHRP 12-34 in 1989 and approved by AASHTO High- way Subcommittee on Bridges and Structures in 1990. 476
