By Mark A. Hurt, Steven D Schrock
Written via a 20-year veteran with the Kansas division Of Transportation Bridge workplace in layout and upkeep, street Bridge upkeep making plans and Scheduling offers Senior Bridge upkeep Engineers useful suggestion for growing a good upkeep application that may not in simple terms to permit for potent, making plans and scheduling but in addition sprucing abilities for making a choice on upkeep priorities and the simplest plan of action had to entire the undertaking on time and shut to funds.
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Additional resources for Highway Bridge Maintenance Planning and Scheduling
44 Various Truss Bridge Configurations. (Adapted from FHWA Bridge Maintenance Manual ). 45 Truss Components. (Adapted from FHWA Bridge Maintenance Manual ). Trusses may also be categorized by whether the deck is supported by secondary framing on top of the trusses (deck truss), above the bottom chord of trusses (through truss), or in between (pony truss). With either the deck or the through trusses, bracing may be placed between the trusses in the plane of the top and bottom chords. Trusses so stiffened are suitable for long spans.
Development of the PONTIS system has continued and it is currently managed by AASHTO and has been renamed BrM (in reference to bridge management). The development of PONTIS led to changes in bridge inspection practices. To model the progression of deterioration effectively required more refined reporting and recording of inspection findings. Bridge owners who implement PONTIS conduct bridge inspections at the element level. For example, in lieu of a single numeric value reporting to the condition state of the deck, the area of the deck in each of five defined states of deterioration is recorded.
21 Concrete Piles. 22 Drilled Shafts. On contemporary highway bridge structures, smaller diameter reinforced concrete shafts may also be found. , but can be up to 42 in. in diameter) or micropile (3–12 in. in diameter) methods. For augercast piles, once the auger reaches its desired depth grout or concrete is pumped through the stem of the auger as it is pulled from the hole. Reinforcing steel is placed afterward. 23). 2 Superstructure Types and Elements The superstructure consists of the elements carrying traffic loads across the spans to bearing on the abutments and piers, and the appurtenances attached to these elements.