|
Blue Bridge (Reed College)
The Blue Bridge, also known as the Cross Canyon Bridge, is a curved pedestrian and bicycle bridge connecting the north and south halves of the Reed College campus in Portland, Oregon, in the United States. The bridge crosses Reed Lake, located within the 28-acre watershed on campus known as the "canyon"; this includes part of the course of Crystal Springs Creek, a tributary of Johnson Creek. The Blue Bridge, completed in 1992, marks the third in a series of bridges that have been commonly referred to as the "cross canyon bridges", signifying their function on campus. The Blue Bridge replaced the Arthur M. Churchill Memorial Bridge, completed in 1959 as a replacement for a flat wooden bridge constructed in the 1930s. The unique design of the Churchill Memorial Bridge, which was supported by two cantilevers of pre-stressed plywood and covered with a thin canvas membrane, made it the only one of its kind in the world. The canvas membrane was later determined to be too slippery. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reed College
Reed College is a private liberal arts college in Portland, Oregon. Founded in 1908, Reed is a residential college with a campus in the Eastmoreland neighborhood, with Tudor-Gothic style architecture, and a forested canyon nature preserve at its center. Referred to as one of "the most intellectual colleges in the country", Reed is known for its mandatory first-year humanities program, senior thesis, progressive politics, de-emphasis on grades, academic rigor, grade deflation, and unusually high proportion of graduates who go on to earn doctorates and other postgraduate degrees. The college has many prominent alumni, including over a hundred Fulbright Scholars, 67 Watson Fellows, and three Churchill Scholars; its 32 Rhodes Scholars are the second-highest count for a liberal arts college. Reed is ranked fourth in the United States for all postsecondary institutions for the percentage of its graduates who go on to earn a Ph.D., after Caltech, Harvey Mudd, and Swarthmore Colleg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Architectural Firm
In the United States, an architectural firm or architecture firm is a business that employs one or more licensed architects and practices the profession of architecture; while in South Africa, the United Kingdom, Ireland, Denmark and other countries, an architectural firm is a company that offers architectural services. History Architects (or master builders) have existed since early in recorded history. The earliest recorded architects include Imhotep (c. 2600 BCE) and Senemut (c. 1470 BCE). No writings exist to describe how these architects performed their work. However, as nobles it is reasonable to assume they had staffs of assistants and retainers to help refine and implement their work. The oldest surviving book on architecture, ''De architectura'' by the Roman architect Vitruvius describes the design and construction of towns, buildings, clocks, and machines, but provides no information about the organisation of the architect's assistants. It is generally accepted that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Bridge At Reed College 2012
Blue is one of the three primary colours A set of primary colors or primary colours (see spelling differences) consists of colorants or colored lights that can be mixed in varying amounts to produce a gamut of colors. This is the essential method used to create the perception of a b ... in the RYB color model, RYB colour model (traditional colour theory), as well as in the RGB color model, RGB (additive) colour model. It lies between Violet (color), violet and cyan on the optical spectrum, spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; Azure (color), azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering#Cause of the blue colour of the sky, Rayleigh scattering. An optical effect called Tyndall effect e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grading (engineering)
Grading in civil engineering and landscape architectural construction is the work of ensuring a level base, or one with a specified slope, for a construction work such as a foundation, the base course for a road or a railway, or landscape and garden improvements, or surface drainage. The earthworks created for such a purpose are often called the sub-grade or finished contouring (see diagram). Regrading Regrading is the process of grading for raising and/or lowering the levels of land. Such a project can also be referred to as a regrade. Regrading may be done on a small scale (as in preparation of a house site)Trees and Home Construction: Minimizing the impact of construction activity on trees University of Ohio Extension Bulletin 870-99. Accessed online 16 October ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete Sealers
Concrete sealers are applied to concrete to protect it from surface damage, corrosion, and staining. They either block the pores in the concrete to reduce absorption of water and salts or form an impermeable layer which prevents such materials from passing. Research from major concrete authorities, including the American Concrete Institute, Portland Cement Association, and the National Ready Mixed Concrete Association confirm that most concrete damage is attributable to surface moisture intrusion. The most pervasive form of concrete damage is surface scaling from freeze/thaw. Other forms of damage include alkali-silica reaction (ASR), chemical intrusion, and corrosion of steel reinforcements. Types In past decades attempts to protect concrete have included sealers ranging from wax to linseed oil. Today, high quality concrete sealers can block up to 99% of surface moisture. There are two main sealer categories: topical sealers (coatings) and penetrating sealers (reactive). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inspection
An inspection is, most generally, an organized examination or formal evaluation exercise. In engineering activities inspection involves the measurements, tests, and gauges applied to certain characteristics in regard to an object or activity. The results are usually compared to specified requirements and standards for determining whether the item or activity is in line with these targets, often with a Standard Inspection Procedure in place to ensure consistent checking. Inspections are usually non-destructive. Inspections may be a visual inspection or involve sensing technologies such as ultrasonic testing, accomplished with a direct physical presence or remotely such as a remote visual inspection, and manually or automatically such as an automated optical inspection. Non-contact optical measurement and photogrammetry have become common NDT methods for inspection of manufactured components and design optimisation. A 2007 Scottish Government review of scrutiny of public ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handrail
A handrail is a rail that is designed to be grasped by the hand so as to provide safety or support. In Britain, handrails are referred to as banisters. Handrails are usually used to provide support for body or to hold clothings in a bathroom or similar areas. Handrails are commonly used while ascending or descending stairways and escalators in order to prevent injurious falls or to hold necessities. Handrails are typically supported by balusters or attached to walls. Similar items not covered in this article include bathroom handrails—which help to prevent falls on slippery, wet floors—other grab bars, used, for instance, in ships' galleys, and barres, which serve as training aids for ballet dancers. Guard rails and balustrades line drop-offs and other dangerous areas, keeping people and vehicles out. British specifications British Standard and British Standard Code of Practice are harmonized to European Normal (EN) series. Handrail height is set between . US speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guard Rail
Guard rail, guardrails, or protective guarding, in general, are a boundary feature and may be a means to prevent or deter access to dangerous or off-limits areas while allowing light and visibility in a greater way than a fence. Common shapes are flat, rounded edge, and tubular in horizontal railings, whereas tetraform spear-headed or ball-finialled are most common in vertical railings around homes. Park and garden railings commonly in metalworking feature swirls, leaves, plate metal areas and/or motifs particularly on and beside gates. High security railings (particularly if in flat metal then a type of palisade) may instead feature jagged points and most metals are well-suited to anti-climb paint. A handrail is less restrictive on its own than a guard rail and provides support. Guardrails also apply in a technology context. Public safety Many public spaces are fitted with guard rails as a means of protection against accidental falls. Any abrupt change in elevatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Column
A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member. The term ''column'' applies especially to a large round support (the shaft of the column) with a capital and a base or pedestal, which is made of stone, or appearing to be so. A small wooden or metal support is typically called a ''post''. Supports with a rectangular or other non-round section are usually called ''piers''. For the purpose of wind or earthquake engineering, columns may be designed to resist lateral forces. Other compression members are often termed "columns" because of the similar stress conditions. Columns are frequently used to support beams or arches on which the upper parts of walls or ceilings rest. In architecture, "column" refers to such a structural element that also has certain proportional and decorative featur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Bridge, Reed College, 2016
Blue is one of the three primary colours in the RYB colour model (traditional colour theory), as well as in the RGB (additive) colour model. It lies between violet and cyan on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering. An optical effect called Tyndall effect explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments. In the eigh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Contractor
A general contractor, main contractor or prime contractor is responsible for the day-to-day oversight of a construction site, management of vendors and trades, and the communication of information to all involved parties throughout the course of a building project. Description A general contractor is a construction manager employed by a client, usually upon the advice of the project's architect or engineer. Responsible for the overall coordination of a project, general contractors may also act as building designer and foreman (a tradesman in charge of a crew). A general contractor must first assess the project-specific documents (referred to as a bid, proposal, or tender documents). In the case of renovations, a site visit is required to get a better understanding of the project. Depending on the project delivery method, the contractor will submit a fixed price proposal or bid, cost-plus price or an estimate. The general contractor considers the cost of home office overhead, gen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Environmental Restoration
Environmental restoration is closely allied with (or perhaps sometimes used interchangeably with) ecological restoration or environmental remediation. In the U.S., remediation is the term used more in the realms of industry, public policy, and civil services. Environmental restoration is a term common in the citizens’ environmental movement. In the 1987 edition of his book ''Restoring the Earth: How Americans are Working to Renew our Damaged Environment'', scientific editor and writer John J. Berger defined environmental restoration (or “natural resource restoration”) as follows: ''"… A process in which a damaged resource is renewed. Biologically. Structurally. Functionally."'' Natural environment The ongoing growth of the human population in the world and its associated impacts, mean that the need for ecological restoration has become increasingly clear. The old adage "an ounce of prevention is worth a pound of cure" points to the fact that ecological restoration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
