The following guidelines should be followed for fastening sign panels to supports:
• Bolts smaller than %s in (8 mm) should not be used to fasten sign panels to the support. The bolts must be long enough to provide for bolt extension beyond the fastening nut.
• Carriage bolts, or hex bolts with washers between the hex head and sign face, should be used to reduce the possibility that the sign might separate from the support upon impact. Flat washers and lock washers should be used at the nut end of the bolt.
• The bolts must be tightened sufficiently to prevent loosening, but not so tight as to distort the sign face.
LOCK WASHER HEX NUT
RECTANQULAR HEAD BOLT
