BRIDGE DESIGN MANUAL

 

Criteria

Structural Steel                                                                                                                             Design Considerations  

 

General Guidelines for Steel Bolts 

1.   M 164 (A325)                 High strength, headed structural steel bolts for use in structural joints. Suitable
                                heavy  hex nuts and plain hardened washers are covered by this specification.
                                These bolts may be hot-dip galvanized. Do not specify for anchor bolts. 

2. A449                                   High strength steel bolts and studs for general applications including anchor
bolts, except in seismic applications or cantilever truss and monotube sign
support foundations.  Recommended for use as anchor bolts where strengths
equivalent to A325 bolts are desired. These bolts may be hot-dip galvanized. 

3. M 314 (F1554)                   Anchor bolts in grades 36, 55, and 105, up to 3 diameter.  This anchor bolt
specification shall be used in seismic applications.  Specify supplemental
Charpy V-notch testing with a minimum of 25 ft-lb at 40 degrees F.   Also, use
these bolts for cantilever truss and monotube sign support foundations.  There
are three strength grades so the appropriate grade shall be specified in the plans. 

4. M 253 (A490)                    High strength alloy steel headed bolts for use in structural joints. These
                                                bolts  should not be galvanized, because of the susceptibility to hydrogen
                                                embrittlement. In lieu of galvanizing, the application of two or three coats
                                                of  an approved zinc rich paint may be specified. Suitable heavy hex nuts and
  
                                             plain hardened washers are covered by this specification. Do not specify for
                                               
anchor  bolts. 

5. A354                                   Grade BD high strength alloy steel bolts and studs. These bolts are suitable
                                                for use as anchor bolts where strengths equal to A490 bolts are desired. Nuts
                                                and washers are covered by this specification.  These bolts should be treated
                                                in the same manner as A490 bolts in regard to galvanizing.