Railroad Bridge Walkway: Post-to-Tie Connection
Railroad Bridge Walkway: Post-to-Tie Connection
(OP)
I've been sifting through AREMA and have found no help:
We're using angles as posts, bolted through timber bridge ties, for a walkway railing. I have to evaluate the connection for a 200# transverse load applied at the point of connection for the top rail.
I don't know if the allowable unit stresses in the AREMA "Timber Structures" volume apply to bridge ties. I fear ties are not graded for strength like structural timber, which seems to be the focus of these tables.
See:
Table 7-2-13
Table 7-2-15
Table 7-2-16
We're using angles as posts, bolted through timber bridge ties, for a walkway railing. I have to evaluate the connection for a 200# transverse load applied at the point of connection for the top rail.
I don't know if the allowable unit stresses in the AREMA "Timber Structures" volume apply to bridge ties. I fear ties are not graded for strength like structural timber, which seems to be the focus of these tables.
See:
Table 7-2-13
Table 7-2-15
Table 7-2-16






RE: Railroad Bridge Walkway: Post-to-Tie Connection
About the worst I have seen is an Fb in 500 psi range... but a good dense Pine or Fir can exceed 2000 psi.
RE: Railroad Bridge Walkway: Post-to-Tie Connection
RE: Railroad Bridge Walkway: Post-to-Tie Connection
RE: Railroad Bridge Walkway: Post-to-Tie Connection
RE: Railroad Bridge Walkway: Post-to-Tie Connection
RE: Railroad Bridge Walkway: Post-to-Tie Connection
They are indeed.