- 업종: Government; Transportation
- Number of terms: 1862
- Number of blossaries: 0
- Company Profile:
Iowa Department of Transportation (DOT) is the state agency responsible for the organization, construction, and maintenance of the of Iowa's highway system. Located in Ames, Iowa DOT is also responsible for licensing drivers and programming and planning for aviation, rail, and public transit.
A structure whose metal elements are connected by welds.
Industry:Construction
A truss having a curved top chord and straight bottom chord meeting at each end, especially when there are more than one used end to end.
Industry:Construction
The topmost layer of material applied upon a roadway to receive the traffic loads and to resist the resulting disintegrating action; also known as wearing course.
Industry:Construction
A long column driven deep into the ground to form part of a foundation or substructure. Also see column and pier.
Industry:Construction
A group of steel cylinders used to facilitate the longitudinal movements resulting from temperature changes and superimposed loads.
Industry:Construction
The roadway portion of a bridge, including shoulders. Most bridge decks are constructed as reinforced concrete slabs, but timber decks are still seen in rural areas and open-grid steel decks are used in some movable bridge designs.
Industry:Construction
Through periodic safety inspections, data is collected on the condition of the primary components of a structure. Condition ratings, based on a scale of 0-9, are collected for the following components of a bridge. A condition rating of 4 or less on one of the following item classifies a bridge as structurally deficient.
* The bridge deck, including the wearing surface:
* The superstructure, including all primary load-carrying members and connections
* The substructure, considering the abutments and all piers
To be eligible for federal aid the following is necessary (a local match is required):
* Replacement: bridge must have a sufficiency rating of less than 50 and * Repair: bridge must have a sufficiency rating of less than 80 and the jurisdiction is prevented from using any additional federal aid for 10 years.
Industry:Construction
Located at the outermost end, it counterbalances the arm of a span extending in the opposite direction from a major point of support. Often attached to an abutment.
Industry:Construction
A movable deck bridge in which the deck may be raised vertically by synchronized machinery at each end.
Industry:Construction
