Delaware Covered Bridge

The State of Delaware chose Pocopson Industries to build the Town Lattice covered highway bridge to replace one lost to flooding. Ben has helped to build two of these already - one larger and longer, and the other lighter – but this is the first intended to carry vehicular traffic regularly. The bid documents included a schematic design which appeared to fully describe the timber superstructure; but the devil really is in the details – a lesson we seem constantly to learn anew. The effort was not simplified by having the new concrete abutments in place, meaning that our richly detailed structure had to fit within very rigid and established constraints. We included several features, including: portal steel moment frames, full-length glulam chords, added verticals at the supports, lattice plank sorting for quality at the span ends, and tuned Bongazzi bolster beams, that we like to believe old Ithiel Town would have admired and encouraged being added to his 1820 patent on the first generation of this remarkable bridge style.

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