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Topic: Truss


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  NASA - Spread Your Wings, It's Time to Fly
The port three and four (P3/P4) integrated truss segment is the prime payload of the STS-115 mission, scheduled to lift off from Launch Pad 39B at Kennedy Space Center, Fla., in late August or early September.
The new truss segment and solar wings are visible on the right side of the station.
The trusses are part of the 11-segment structure that will eventually span more than 300 feet when the station is completed.
www.nasa.gov /mission_pages/station/behindscenes/truss_segment.html   (663 words)

  
  Truss - Wikipedia, the free encyclopedia
Since this is a symmetrical truss with symmetrical vertical loads, it is clear to see that the reactions at A and B are equal, vertical and half the total load.
The effect of the weight of the individual truss members in a large truss, such as a bridge, is usually insignificant compared to the force of the external loads.
A geodesic dome is a truss in the shape of a sphere.
en.wikipedia.org /wiki/Truss   (1529 words)

  
 Truss bridge - Wikipedia, the free encyclopedia
A truss bridge is a bridge composed of connected elements (typically straight) which may be stressed from tension, compression, or sometimes both in response to dynamic loads.
For purposes of analysis most truss bridges may be considered to be pin jointed where the straight components meet.
Truss bridges were a common type of bridge to see built from the 1870s through the 1930s.
en.wikipedia.org /wiki/Truss_bridge   (867 words)

  
 TRUSS CONCEPTS
In reality, the members in a truss do see a small amount of bending and twisting, however these loads are small and the axial loads (tension or compression) are significant.
Actually, a truss is made by connecting the ends of the members by welding, bolting, etc. The neutral axis of each member may only come close to intersecting at a center point.
Trusses are used because they make very efficient use of the strength of the members.
www.texbrick.com /ideas/truss/theory.html   (689 words)

  
 Truss Terms
Scissors Truss) member that establishes the lower edge of a truss, In a conventional system, this is the ceiling joist.
A truss design where loading requirements, lumber species, sizes, grades and connector plate requirements are detailed and a certified engineer's seal is affixed.
Forces acting on a truss, through its support, that are equal but opposite to the sum of the dead and live loads.
www.razortruss.com /trussterms.htm   (1030 words)

  
 Roof Truss Bracing   (Site not responding. Last check: 2007-10-26)
Truss bracing can be broken down into three categories; temporary bracing, permanent bracing of individual truss members, and permanent bracing for the overall stability of the structure.
Temporary bracing is used during the erection of roof trusses to prevent the trusses from bucking and falling over during the erection process.
This bracing is the responsibility of the builder and the builder should consult the literature described in the code, and available from the truss industry, on the proper use of temporary bracing during the erection of trusses.
www.statefarm.com /consumer/vhouse/articles/rooftrus.htm   (1231 words)

  
 Adjusting Your Guitars Truss Rod - What is it? How do I check relief? How do I adjust the rod properly?
Continuing to tighten a truss rod after the neck is dead flat serves no purpose as the instrument will simply buzz as the strings vibrate against the hump in the center of the board that has been created by backbowing the neck.
A stripped or broken truss rod is the kiss of death for most inexpensive instruments and the repair of such is usually only considered on instruments of value.
Depending on the instrument, some truss rods may be inlayed flush with the top of the neck, easily visible upon the boards removal or buried deeper and covered by a strip of wood.
www.fretnotguitarrepair.com /trussrods.htm   (1878 words)

  
 Truss Bridges - Tennessee Department of Transportation
A truss is a series of individual members, acting in tension or compression and performing together as a unit.
On truss bridges, a tension member is subject to forces that pull outward at its ends.
Most truss types bear the name of the person(s) who developed the pattern, such as the Pratt truss that is named for Caleb and Thomas Pratt who patented it in 1844.
www.tdot.state.tn.us /bridges/trussbridges.htm   (660 words)

  
 Trade Show Exhibit Booth Display Truss
We offer 4 different sizes of truss to fabricate exciting and cost effective exhibit booths and exhibit structures for your trade show display.
We offer a huge range of aluminum truss structures for trade show displays and exhibits by selecting from a wide variety of stock and custom corners and truss lengths to create exciting structures that stand out in a crowd.
The high tech look of our aluminum truss is a popular choice these days but creating a cost effective and versatile display is often a huge effort.
www.exhibitanddisplaytruss.com   (275 words)

  
 Bridge Types - Truss   (Site not responding. Last check: 2007-10-26)
Trusses are comprised of many small beams that together can support a large amount of weight and span great distances.
The small size of individual parts of a truss make it the ideal bridge for places where large parts or sections cannot be shipped or where large cranes and heavy equipment cannot be used during erection.
The Pratt truss (illustration #3) is identified by its diagonal members which, except for the very end ones, all slant down and in toward the center of the span.
www.matsuo-bridge.co.jp /english/bridges/basics/truss.shtm   (357 words)

  
 New York State Covered Bridges - Truss Diagrams
Trusses have been used in bridge building since the middle ages.
Stringers span longitudinally, parallel to the trusses spanning the floorbeams.
A king post truss is the simplest form of a truss bridge.
www.coveredbridgesite.com /ny/truss.html   (482 words)

  
 The Burr Truss
Two kinds of bridges were in common use, the lattice truss and the trussed arch, of which there were as many varieties as there were builders.
The association of a truss with an arch was not mere artistic choice.
It was impossible to make the arch and the truss work together to share the load equally, so unless each of the two elements was alone capable of supporting the load, the bridge was subject to collapse, and many did so.
www.du.edu /~jcalvert/tech/burr.htm   (2080 words)

  
 Space Truss - Civil Engineering Magazine - April 2000   (Site not responding. Last check: 2007-10-26)
The typical bulkhead for a hexagonal truss segment is made from a single 12,000 lb (5,450 kg), 11 by 14 ft (3.4 by 4.3 m) piece of aluminum that is 4.5 in.
The optical coatings minimize the thermal cycling on the truss and also enable astronauts to climb along the truss to construct the station and conduct experiments without their spacesuits freezing to the structure.
The truss segments are not regular hexagons; the sides are not equal in length.
www.pubs.asce.org /ceonline/0400feat.html   (3374 words)

  
 Truss
A truss is a type of framework, usually comprising straight struts and ties, which is designed to be stiff, even if all the joints are considered to be pinned.
Compared with a simple beam, a truss can look very complicated, yet when you come to calculate what happens, the truss can be the simpler case, especially if the joints are pure pins.
Please note that these are not trusses, as they are not based on triangles, and they obtain some stiffness in the plane of the wing by means of the thin membrane, like the stressed skin of many aircraft.
www.brantacan.co.uk /truss.htm   (1412 words)

  
 Truss Design
There was usually some truss arrangment to stiffen the deck and main arches, according to the prejudices of the designer, so it was usually uncertain just what parts of the bridge were effective and which were not.
The loads w are applied to the truss at the panel joints, and the reactions R are applied at the ends.
When trusses were made with as much wood and as little iron as possible, the Howe truss was popular, since only the verticals and the lower chord had to be iron rods.
www.du.edu /~jcalvert/tech/machines/bridges.htm   (2050 words)

  
 Truss
A truss is a type of framework, usually comprising straight struts and ties, which is designed to be stiff, even if all the joints are considered to be pinned.
An impressively massive wooden truss can be seen in the Zygmunt tower of the cathedral of Krakow, where it provides stiffness against the swing of the huge bells.
Please note that these are not trusses, as they are not based on triangles, and they obtain some stiffness in the plane of the wing by means of the thin membrane, like the stressed skin of many aircraft.
brantacan.co.uk /truss.htm   (1421 words)

  
 Science Project
One example of a truss bridge is the Lendenthals Sciotoville Bridge that crosses the Ohio River and has a truss of 1550 feet long with two long spans of 775 feet each.
Another example of a truss bridge is the Astoria Bridge, which was built over the Columbia River, in Oregon and was the longest continuous truss bridge with a 1232-foot span.
Truss bridges are used to span long distances; for example the Astoria Bridge which has a 1232-foot span and is the longest continuous truss bridge has 3 or more supports, or piers.
www.selah.k12.wa.us /SOAR/SciProj2000/AaronJ.html   (1686 words)

  
 SECTION 05410
Truss manufacturer is to inspect the roof and/or floor trusses after the installation is complete and issue a written report indicating whether the trusses were installed per Part 3 ‘Execution’.
Truss member sizes, gauges and connections at truss joints; truss to truss attachment details.
Provide manufacturer's standard steel truss members, bracing, bridging, blocking, reinforcements, fasteners and accessories with each type of steel framing required, as recommended by the manufacturer for the applications indicated and as needed to provide a complete light gauge cold-formed steel truss package.
www.superior-truss.com /Spec05410.htm   (2011 words)

  
 Bridge Basics - A Spotter's Guide to Bridge Design   (Site not responding. Last check: 2007-10-26)
The king post truss is the simplest type; the queen post truss adds a horizontal top chord to achieve a longer span, but the center panel tends to be less rigid due to its lack of diagonal bracing.
His truss design, patented in 1817, is not a true arch as it relies on the interaction of the arch segments with the truss members to carry the load.
The composite cast and wrought iron Bollman truss was common on the Baltimore and Ohio Railroad.
pghbridges.com /basics.htm   (2337 words)

  
 The Bollman Truss
The Baltimore and Ohio and the Bollman Truss
The term suspension truss is used for this kind of bridge, but it must be kept in mind that its action is very different from that of a truss bridge, though it appears very similar to the casual observer.
Although this truss shares the disadvantages of the Bollman Truss as a bridge, it is a very good roof truss, and is still in common use.
www.du.edu /~jcalvert/tech/bolltrus.htm   (3279 words)

  
 truss
truss, in architecture and engineering, a supporting structure or framework composed of beams, girders, or rods commonly of steel or wood lying in a single plane.
A truss usually takes the form of a triangle or combination of triangles, since this design ensures the greatest rigidity.
Trusses are used for large spans and heavy loads, especially in bridges and roofs.
www.factmonster.com /ce6/world/A0849545.html   (212 words)

  
 Notes on Truss Inspection, James Thomas Engineering
All trusses need to be inspected by a competent Testing House or Persons qualified to inspect truss and associated parts.
Should the truss fail any of the standards set in items 1, 2, or 3, it must be stamped "unsafe do not use" and also taken out of service.
If the truss fails on any of the standards set in 4, 5, or 6, then the failing parts must be replaced before approval is given.
www.jthomaseng.com /Inspect.html   (607 words)

  
 Lighting Truss Lighting Display Trusses Aluminum Exhibit Truss System Truss Display System
Are you looking for a portable lightweight modular aluminum exhibit truss system for a trade show booth, trade show display truss, exhibit, or kiosk?
It is ideal for use in trade show booths, exhibits, displays, kiosks, and many lighting design and staging applications.
Due to its modular design, Versatruss is portable and easy to set up.Our lighting truss system is so flexible that almost any custom design can be achieved including curving; the ultimate in lighting display trusses.
www.versatruss.com   (155 words)

  
 STS-92 Payload: Z1 Integrated Truss Segment
The Z1 truss segment is equipped with several spacewalk aids: Two EVA tool stowage devices (ETSDs), 22 worksite interface (WIF) sockets, 1 flight-releasable grapple fixture (FRGF), 11 trusses, 2 tray launch restraints, numerous standard handholds and handrails, and several custom handles.
The Z1 truss structure is designed to maximize component packaging and support load paths during launch and on orbit.
The trunnion and keel pin beam elements are INCO 718, and the Ku-band antenna boom beam elements are steel.
www.shuttlepresskit.com /STS-92/payload76.htm   (2050 words)

  
 LENTICULAR TRUSS BRIDGES IN MASSACHUSETTS
Of the nearly hundred lenticular truss bridges that are estimated to have been built between about 1878 and 1895 in the Commonwealth of Massachusetts, only nine are known to exist.
These bridges are sometimes referred to as "pumpkin-seed bridges", "cats-eyes bridges", "elliptical truss bridges", or "parabolic truss bridges" because of their unique lense shape.
The bridge is a typical example of a Berlin Iron Bridge Co. Lenticular Pony Truss.
www.ecs.umass.edu /cee/cee_web/bridge/1.html   (615 words)

  
 Preprints and Papers
Truss, Elementary properties of cycle-free partial orders and their automorphism groups, Order 18 (2001), 359-379.
M. Droste and J. Truss, On representing words in the automorphism group of the random graph, University of Leeds preprint, 16, 2005, to appear in the Journal of Group Theory.
D. Sawyer and J. Truss, Classification of a class of continuous maps on the unit interval, University of Leeds preprint, 26, 2005.
www.amsta.leeds.ac.uk /Pure/staff/truss/preprints.html   (1318 words)

  
 Covered Bridge's Truss Types
The kingpost that forms the basis for this truss is found in the center two panels.
A three panel truss used for short spans, the queenpost was devised as an extension of the basic kingpost by placing a horizontal member in the center panel.
Connecticut architect Ithiel Town received a patent for a truss of crisscrossed diagonals, or lattice, in 1820.
www.dot.state.oh.us /se/coveredbridges/truss_types.htm   (262 words)

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