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- A -- B -- C -- D -- E -- F -- G -- H -- I -- J -- K -- L -- M -- N -- O -- P -- Paddleford truss (28)
- Painted International Orange (3)
- Painted Kelly Green (1)
- Painted Seafoam Green (7)
- Painted Surf Green (11)
- Painted black (26)
- Painted blue (76)
- Painted blue (Originally painted green) (1)
- Painted gray (9)
- Painted green (156)
- Painted lavender (1)
- Painted red (67)
- Painted silver (12)
- Painted white (4)
- Painted yellow (15)
- Parker pony truss (383)
- Parker through truss (1,312)
- Parker truss (1,696)
- Partridge truss (9)
- Pedestrian Movable Bridges (34)
- Pedimented portal bracing (60)
- Pegram deck truss (2)
- Pegram truss (25)
- Pennsylvania truss (493)
- Petit (1)
- Philadelphia Rapid Transit (1)
- Phoenix columns (73)
- Pier (1)
- Pier Bents (3)
- Pigtail Bridges (4)
- Pike Bridge (1)
- Pin-and-hanger Plate Girder (4)
- Pin-connected (3,943)
- Pipe Railing (3)
- Pipe Truss (4)
- Plastic deck (1)
- Plate girder (8,042)
- Polygonal Warren pony truss (384)
- Polygonal Warren pony truss with all verticals (65)
- Polygonal Warren pony truss with alternating verticals (177)
- Polygonal Warren pony truss with no verticals (11)
- Polygonal Warren through truss (436)
- Polygonal Warren through truss with all verticals (109)
- Polygonal Warren through truss with alternating verticals (48)
- Polygonal Warren through truss with no verticals (3)
- Polygonal Warren through truss with sub-panels (13)
- Polygonal Warren truss (1,061)
- Pontoon (39)
- Pony Approach (1)
- Pony truss (16,311)
- Post Deck Truss (5)
- Post truss (50)
- Pratt deck truss (360)
- Pratt half-hip pony truss (1)
- Pratt half-through truss (7)
- Pratt pony truss (3,670)
- Pratt through truss (5,457)
- Pratt truss (9,394)
- Pre-fab, modular steel panel truss (14)
- Pre-stressed concrete (13)
- Precast Closed-spandrel arch (4)
- Q -- R -- S -- S Bridge (24)
- San Antonio (1)
- Scherzer-type rolling lift (70)
- Schinke bascule type (2)
- Scissors deck truss (1)
- Segmental box girder (13)
- Self-anchored (7)
- Self-anchored suspension (7)
- Shear Pole Type (18)
- Shortened (2)
- Six Flags Amusement Parks (6)
- Skewed (4,919)
- Skewed Hanover design (1)
- Skywalk/Industrial Bridge (22)
- Slab (2,089)
- Smith truss (46)
- Span Drive Vertical Lift (90)
- Span length 25-50 feet (15,738)
- Span length 50-75 feet (10,126)
- Span length 75-100 feet (6,464)
- Span length 100-125 feet (4,412)
- Span length 125-175 feet (4,242)
- Span length 175-250 feet (1,994)
- Span length 250-500 feet (1,196)
- Span length 500-1000 feet (392)
- Span length over 1000 feet (106)
- Span length under 25 feet (6,918)
- Spindle handrail (1)
- Spiral Bridge (8)
- Springfield Street Railway Co. (1)
- Squire Whipple lift type (32)
- Staircase (2)
- Stearns truss (2)
- Steel Trestle (151)
- Steel arch (386)
- Steel grate deck (451)
- Steel rigid frame (80)
- Steel stringer (6,329)
- Steel through arch (218)
- Stone Abutments (99)
- Stone Box Culvert (1)
- Stone Culvert (22)
- Stone Veneer (7)
- Stone arch (3,098)
- Stone piers (39)
- Stone-and-Brick Arch (48)
- Stop Sign Controlled (6)
- Stoplight Controlled (21)
- Strauss Articulated Overhead Counterweight Bascule (1)
- Strauss Direct Lift (3)
- Strauss Heel Trunnion Bascule (54)
- Strauss Overhead Counterweight Bascule (54)
- Strauss underneath counterweight bascule (48)
- Streamlined Moderne Architectural Style (1)
- Suspended Deck Through Truss (18)
- Suspension (725)
- Swing (1,474)
- T -- T.R.U.S.S. Award (1)
- Tall Bridges (324)
- Tall Wooden Trestle (34)
- Tar Deck (1)
- Tee beam (18)
- Thacher Through Truss (1)
- Thacher pony truss (1)
- Thacher truss (14)
- Thomas Arch (1)
- Through girder (3,874)
- Through truss (15,278)
- Tied arch (51)
- Timber Trestle (67)
- Timber arch (45)
- Timber balustrade (6)
- Timber braced tunnel (6)
- Timber bridge (11)
- Timber columns (1)
- Timber deck (15)
- Timber pony arch (7)
- Timber stringer (4,072)
- Timber through arch (21)
- Timber truss (8)
- Total length 25-50 feet (11,234)
- Total length 50-75 feet (9,325)
- Total length 75-100 feet (6,603)
- Total length 100-125 feet (5,195)
- Total length 125-175 feet (5,948)
- Total length 175-250 feet (4,296)
- Total length 250-500 feet (5,273)
- Total length 500-1000 feet (2,884)
- Total length 1000-2500 feet (1,891)
- Total length over 2500 feet (919)
- Total length under 25 feet (2,509)
- Tower Drive Vertical Lift (64)
- Town lattice portal bracing (17)
- Town lattice truss (268)
- Transporter Bridge (2)
- Triple-barreled (7)
- Triple-intersection lattice through truss (34)
- Troll (2)
- Truesdell through truss (1)
- Truesdell truss (11)
- Truss (33,130)
- Tunnel (1,319)
- Turntable (32)
- Twin-Span (22)
- Two-angle steel (45)
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