I recently heard it said that a footing shear keys (to resist sliding) in wingwall footings are not acceptable for a railroad bridge. The local railroad authority's standard criteria mentions nothing of the sort. I don't have a copy of AREMA manual.
Does anyony know if this is an AREMA...
Situation - 8" (min.) thick continuously reinforced concrete slab used to pave a drainage channel. Channel section is trapezoidal with 12' wide bottom and 7ft. deep. The reinforcing steel (#5 @8" longitudinal, #4@16" transverse) was placed too low in the slab. Bottom cover is thus around 1"...
The LRFD Specifications for Steel Hollow Structural Sections include provisions for determining the strength of the section when there is a concentrated force distributed longitudinally at the center of the HSS face (section 8.2). There is no distinction made for whether this load is assumed to...
If I wish to specify that a 3/4" diameter A307 threaded rod be butt welded to a flat plate or beam flange using a full penetration weld:
1. Is a weld symbol required, or would simply stating with a plan note that a fiull penetration weld be used be adequate?
2. If a weld symbol is not...
