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Old Posted Apr 28, 2013, 1:49 AM
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scalziand scalziand is offline
Mortaaaaaaaaar!
 
Join Date: Aug 2007
Location: Naugatuck, CT/Worcester,MA
Posts: 3,476
The thing is, these old truss bridges are very maintenance intensive. Although the trusses have very efficient use of material, they have so much surface area that requires painting and are vulnerable to rust. Not to mention the current trend in civil engineering (spurred by the I65W collapse) to remove truss bridges that don't have redundant load paths.
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