Breakaway Posts
Breakaway sign supports should be maintained to assure performance
of the breakaway feature.
On rectangular slip base sign supports, the slip base plate
and fuse plate connection bolts should be examined for proper tightness,
and the fuse plates and post-flanges should be examined for cracking
or failure. (See the
for details.) Over tightening
of the base plates can cause the support not to break away properly.
The bolt keeper plate for bolted breakaway sign posts should
be in place between the stub post base plate and the sign post base
plate to ensure that the sign support system functions properly.
Also all washers should be installed as shown on Traffic Engineering
Standard Sheets.
The foundation should also be checked for erosion of surrounding
soil.