A BRIDGE TOO PLAIN TO BE

ORIGINALBy Nicholas Mendoza

MY BRIDGE

Dennis H. Mahan Memorial Bridge Project ID: 00054A-020413 Iteration #65 (Thu, 7 Feb 2013, 10:50:12) Iteration #65 (Thu, 7 Feb 2013, 10:50:12) Type of Cost Item Cost Calculation Cost Material Cost (M) Carbon Steel Solid Bar (537.3 kg) x ($3.78 per kg) x (2 Trusses) = $4,062.11 Carbon Steel Hollow Tube (3511.9 kg) x ($6.30 per kg) x (2 Trusses) = $44,250.17 High-Strength Low-Alloy Steel Solid Bar (452.2 kg) x ($4.62 per kg) x (2 Trusses) = $4,177.96 High-Strength Low-Alloy Steel Hollow Tube (1238.8 kg) x ($7.03 per kg) x (2 Trusses) = $17,418.08 Quenched & Tempered Steel Hollow Tube (85.9 kg) x ($7.95 per kg) x (2 Trusses) = $1,365.98

Connection Cost (C) (20 Joints) x (300.0 per joint) x (2 Trusses) = $12,000.00

Product Cost (P) 1 - 90x90x4 mm High-Strength Low-Alloy Steel Tube (%s per Product) = $1,000.00 1 - 100x100x5 mm Carbon Steel Tube (%s per Product) = $1,000.00 1 - 110x110 mm Carbon Steel Bar (%s per Product) = $1,000.00 1 - 110x110x5 mm Carbon Steel Tube (%s per Product) = $1,000.00 5 - 120x120x6 mm Carbon Steel Tube (%s per Product) = $1,000.00 1 - 120x120 mm High-Strength Low-Alloy Steel Bar (%s per Product) = $1,000.00 1 - 120x120x6 mm Quenched & Tempered Steel Tube (%s per Product) = $1,000.00 12 - 140x140x7 mm Carbon Steel Tube (%s per Product) = $1,000.00 1 - 150x150x7 mm Carbon Steel Tube (%s per Product) = $1,000.00 1 - 160x160x8 mm Carbon Steel Tube (%s per Product) = $1,000.00 7 - 160x160x8 mm High-Strength Low-Alloy Steel Tube (%s per Product) = $1,000.00 3 - 170x170x8 mm Carbon Steel Tube (%s per Product) = $1,000.00 2 - 180x180x9 mm Carbon Steel Tube (%s per Product) = $1,000.00

Site Cost (S) Deck Cost (10 4-meter panels) x ($4,850.00 per panel) = $48,500.00 Excavation Cost (18,000 cubic meters) x ($1.00 per cubic meter) = $18,000.00 Abutment Cost (2 standard abutments) x ($4,000.00 per abutment) = $8,000.00 Pier Cost (1 16-meter pier) = $15,500.00 Cable Anchorage Cost No anchorages = $0.00

Total Cost M + C + P + S$71,274.29 + $12,000.00 + $13,000.00 + $90,000.00 = $186,274.29

DECK TRUSSSOUTH FORK SKYKOMISH RIVER SUNSET FALLS BRIDGE

Design 12 panel Warren deck truss with deck plate girder approach spans

Location: Snohomish County, Washington

Built in 1966 to recross the river and rejoin the original alignment to eliminate a long curved section of line. This is one of the 8 bridges built during the Index-East Gold Bar realignment

WARREN PONY TRUSSALEXANDER BRIDGE

Design Original: Riveted Warren pony trussReplacement: Bolted Warren pony truss Location: Catoosa County, Georgia

Built 1907; stone abutments date to 1897; bridge rehabilitated 1971; closed to vehicular traffic 2009, reopened with new truss structure December 2011

WHIPPLE DECK TRUSSDOS RIOS BRIDGE

Design Whipple (Double-Intersection Pratt) Deck truss with pinned connections and

Phoenix Columns.

Location: Mendocino County, California

Whipple (Double-Intersection Pratt) Deck truss bridge with pinned connections and Phoenix Columns. Rehabilitated with seismic retrofits. Retrofit, 2006. Link to seismic retrofit contractor

SOURCES Deck Truss:http://bridgehunter.com/wa/snohomish/bh51966/

Warren Pony Truss:http://bridgehunter.com/ga/catoosa/5220001P0000000/

Whipple Deck Truss:http://bridgehunter.com/ca/mendocino/bh43905/