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Bridge Over North Fork Of Roanoke River
Bridge over North Fork of Roanoke River was a historic Pratt truss bridge located near Ironto, Montgomery County, Virginia. It was built by the King Bridge Company in 1892, and was a pin-connected through Pratt truss spanning between cast-in-place concrete abutments. It had ornamental steel lattice portal bracing around the top of the portals. an''Accompanying photo''/ref> The bridge was removed in 1995–1996, and replaced with new bridge. The bridge was listed on the National Register of Historic Places in 1989 and delisted in 2001. See also * List of bridges on the National Register of Historic Places in Virginia References Former National Register of Historic Places in Virginia Road bridges in Virginia Bridges completed in 1892 National Register of Historic Places in Montgomery County, Virginia Pratt truss bridges in the United States 1892 establishments in Virginia 1996 disestablishments in Virginia Transportation in Montgomery County, Virginia King Brid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ironto, Virginia
Ironto is an Unincorporated area, unincorporated community in Montgomery County, Virginia, Montgomery County, Virginia, United States. Ironto is located along a railroad east of Blacksburg, Virginia, Blacksburg. References Unincorporated communities in Montgomery County, Virginia Unincorporated communities in Virginia {{MontgomeryCountyVA-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt Truss
A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements, usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently. Design The nature of a truss allows the analysis of its structure using a few assumptions and the application of Newton's laws of motion according to the branch of physics known as statics. For purposes of analysis, trusses are assumed to be pin jointed where the straight components meet, meaning that taken alone, every joint on the structure is functionally considered to be a flexible joint as opposed to a rigid joint with strength to maintain its own shape, and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montgomery County, Virginia
Montgomery County is a county located in the Valley and Ridge area of the U.S. state of Virginia. As population in the area increased, Montgomery County was formed in 1777 from Fincastle County, which in turn had been taken from Botetourt County. As of the 2020 census, the population was 99,721. Its county seat is Christiansburg, and Blacksburg is the largest town. Montgomery County is part of the Blacksburg-Christiansburg metropolitan area. It is dominated economically by the presence of Virginia Tech, Virginia's third largest public university, which is the county's largest employer. Board of Supervisors The Montgomery County Board of Supervisors sets the annual budget and tax rates, enacts legislation governing the county and its citizens, sets policies and oversees their implementation. There are seven supervisors; one is elected from each of the seven geographic districts. Terms are four years; three or four seats are up for re-election each odd year. History Mont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
King Bridge Company
The King Iron Bridge & Manufacturing Company was a late-19th-century bridge building company located in Cleveland, Ohio. It was founded by Zenas King (1818–1892) in 1858 and subsequently managed by his sons, James A. King and Harry W. King and then his grandson, Norman C. King, until the mid-1920s. Many of the bridges built by the company were used during America's expansion west in the late 19th century and early 20th century, and some of these bridges are still standing today. Remaining examples *Pyeatt's Mill Bridge AKA "Boner Bridge" (1869, Restored 2010), Little Pigeon River in Warrick County, Indiana *Crum Road Bridge (1875), Walkersville, Maryland * Skunk River Bridge (1876), Story County, Iowa. Originally located over the Skunk River in Cambridge, Iowa, moved southeast of Ames, Iowa in 1916. Vacated in 1990, and NRHP-listed in 1998. * Marmaton Bridge (1878), Fort Scott, Kansas, 1 mile NE of Fort Scott, NRHP-listed *Bowstring Truss Bridge (1878), near Ironto, Vir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places
The National Register of Historic Places (NRHP) is the United States federal government's official list of districts, sites, buildings, structures and objects deemed worthy of preservation for their historical significance or "great artistic value". A property listed in the National Register, or located within a National Register Historic District, may qualify for tax incentives derived from the total value of expenses incurred in preserving the property. The passage of the National Historic Preservation Act (NHPA) in 1966 established the National Register and the process for adding properties to it. Of the more than one and a half million properties on the National Register, 95,000 are listed individually. The remainder are contributing resources within historic districts. For most of its history, the National Register has been administered by the National Park Service (NPS), an agency within the U.S. Department of the Interior. Its goals are to help property owners and inte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Bridges On The National Register Of Historic Places In Virginia ...
This is a list of bridges and tunnels on the National Register of Historic Places in the U.S. state of Virginia. References {{NRHP bridges Virginia Bridges Bridges A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Former National Register Of Historic Places In Virginia
A former is an object, such as a template, gauge or cutting die, which is used to form something such as a boat's hull. Typically, a former gives shape to a structure that may have complex curvature. A former may become an integral part of the finished structure, as in an aircraft fuselage, or it may be removable, being using in the construction process and then discarded or re-used. Aircraft formers Formers are used in the construction of aircraft fuselage, of which a typical fuselage has a series from the nose to the empennage, typically perpendicular to the longitudinal axis of the aircraft. The primary purpose of formers is to establish the shape of the fuselage and reduce the column length of stringers to prevent instability. Formers are typically attached to longerons, which support the skin of the aircraft. The "former-and-longeron" technique (also called stations and stringers) was adopted from boat construction, and was typical of light aircraft built until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road Bridges In Virginia
A road is a linear way for the conveyance of traffic that mostly has an improved surface for use by vehicles (motorized and non-motorized) and pedestrians. Unlike streets, the main function of roads is transportation. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, thoroughfares, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base other than rails or air strips open to public traffic, primarily for the use of road motor vehicles running on their own wheels", w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridges Completed In 1892
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Register Of Historic Places In Montgomery County, Virginia
__NOTOC__ This is a list of the National Register of Historic Places listings in Montgomery County, Virginia. This is intended to be a complete list of the properties and districts on the National Register of Historic Places in Montgomery County, Virginia, United States. The locations of National Register properties and districts for which the latitude and longitude coordinates are included below, may be seen in a Google map. There are 70 properties and districts listed on the National Register in the county. Another 4 properties were once listed but have been removed. Current listings Former listings See also * List of National Historic Landmarks in Virginia * National Register of Historic Places listings in Virginia * National Register of Historic Places listings in Radford, Virginia __NOTOC__ This is a list of the National Register of Historic Places listings in Radford, Virginia. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pratt Truss Bridges In The United States
Pratt is an English surname. Notable people with the surname include: A–F * Abner Pratt (1801–1863), American diplomat, jurist, politician, lawyer * Al Pratt (baseball) (1847–1937), American baseball player * Andy Pratt (baseball) (born 1979), American baseball player * Andy Pratt (singer-songwriter) (born 1947), American singer-songwriter and musician * Antwerp Edgar Pratt (1852-1924), British naturalist, explorer, collector of plants and animals * Awadagin Pratt (born 1966), American concert pianist * Babe Pratt (Walter Peter Pratt, 1916–1988), Canadian ice hockey player * Betty Rosenquest Pratt, (1925–2016), American tennis player * Bob Pratt (1912–2001), Australian rules footballer * Caleb S. Pratt (1832–1861), Union Officer * Charles Pratt, 1st Earl Camden (1713–1794), British lawyer * Charles Pratt (1830–1891), American businessman and philanthropist * Chris Pratt (born 1979), American actor * Christopher Pratt (born 1935), Canadian artist * Daniel Pratt (e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
