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.