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Topic: Beam (structure)

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In the News (Fri 22 Mar 19)

  Geobarns - specializing in elegant and artistic barns using a modified post and beam structure and timber frame
Geobarns specializes in building artistic barns using modified post and beam structures with diagonal framing to achieve a combination of strength, versatility and beauty at reasonable prices.
Geobarns is dedicated to building quality barn structures for any use the client wishes.
George frequently meets several times with clients to determine what they want in conjunction with their site and budget considerations before suggesting a working design which then goes back and forth for fine tuning.
www.geobarns.com   (143 words)

  BEAM (STRUCTURE) FACTS AND INFORMATION   (Site not responding. Last check: )
A beam is a structural element that carries load primarily in bending (flexure).
Beams are characterized by their profile (the shape of their cross-section), their length, and their material.
Mathematical methods for determining the beam forces (internal forces of the beam and the forces that are imposed on the beam support) include the "moment distribution method," the force or flexibility method, and the matrix stiffness method.
www.livingflowers.com /Beam_(structure)   (477 words)

 Balltape structure for tape automated bonding, multilayer packaging, universal chip interconnection and energy beam ...
Also, the uniformity of the structures formed is relatively insensitive to the linear dimensions of the TAB beams that are to be formed, since the diameter of the ball formed varies as the cube root of any one of the linear dimensions.
The metallic pattern of conductor beams 13 on the substrate 7 is thus fed to a position aligned properly with a machine for TAB (Tape-Automated Bonding) of the soft, copper, ball-shaped ends 9 of conductive beam leads 13 on the tape 10 to aluminum (or coated aluminum) conductor pads 21 on the chip 12.
The one beam lead 13 is terminated at 24 as all of the leads were prior to treatment with a laser beam to form a ball on the end thereof, in accordance with the process of this invention.
www.freepatentsonline.com /4814855.html   (12158 words)

 Beams - theory and practice
The bodies of many animals can be considered as beams between the legs, and their necks can be considered as cantilevers, though of course the internal structure is vastly more complicated than anything made by people Look at a giraffe, for example.
At the centre of the beam, the cross section is at 45 degrees to the horizontal.
To make a beam more stiff, instead of merely using more material to deepen a beam, it is better to split the existing material into several parallel beams which are deep but narrow; this is a better use of the material.
www.brantacan.co.uk /beam.htm   (3541 words)

 Beam (structure) - Wikipedia, the free encyclopedia
Under gravity loads, the top of the beam is under compression while the bottom of the beam is under tension, leaving the middle of the beam relatively stress-free in the middle of the span, with shear stress above the supports.
Beam deflections are also minimised for aesthetic reasons.
The fact that most of the material is placed away from the neutral axis (axis of symmetry in case of I beams) increases the second moment of area of the beam which in turn increases the stiffness.
en.wikipedia.org /wiki/Beam_(structure)   (686 words)

 Lightweight, removable gate seal - Patent 4355000
Inflatable sealing members are mounted on the lightweight beam structure and are operable when the gate is in a locked position to expand between the gate and wall, thereby forming a leak-tight seal.
The beam structure includes connector flanges so that a hoisting apparatus may be attached to the lightweight structure to lift the entire sealing means from the gate for repair, maintenance or replacement.
The beam structure 100 may be supported by the gate 105 or by any other suitable means and the sealing elements 103 are inflatable to form a leak-tight seal between the gate 105 and reactor well wall 106.
www.freepatentsonline.com /4355000.html   (3613 words)

 CNN - TWA Flight 800: One Year Later - 1997
Bolts attaching the KBB upper chords to the CWT at the front spar, spanwise beam #3, spanwise beam #2, and the mid-spar bulkhead remained with the KBB upper chords.
The upper chords of the stub beams that attach to the RBL 98 floor beam are buckled and bent aft.
Outboard of Elevator STA 356 the counter balance weight structure is bent upwards and the stabilizer panels between the hinge line and the rear spar remain with the stabilizer.
www.cnn.com /US/9707/twa.800/reports/structures.html   (19504 words)

 Bridge types - beam structure bridges - beam, cantilever, draw, truss   (Site not responding. Last check: )
A beam bridge is made with large supports on the edges and a heavy beam crossing over water, a ditch, or other open space.
The cantilever bridge is a bridge formed by two projecting beams or trusses that are joined in the center by a connecting member and are supported on piers that are anchored by balancing members.
In other words, there are two beams with a tower that holds them together in the middle, and there are weights on each end to balance it.
www.pennridge.org /works/brbeam.html   (341 words)

 Understanding the PB beam spill structure
Ideally the beam to E831 is extracted uniformly from the accelerator throughout the (approximately) 20 sec duration of the slow spill.
Macro Spill Structure: The large time scale structure of the spill is monitired by displaying the current draw in the PWC's and Straw Chambers on an oscilliscope.
Micro Spill Structure: The micro structure of the beam is determined by the distribution of the beam within the Tevatron and how evenly it is extracted.
www-focus.fnal.gov /spill_structure.html   (1159 words)

 beam & column structures - column, post, & lintel   (Site not responding. Last check: )
Beams are found in many places - in buildings, in homes, and in moving structures.
This small bridge or culvert is actually a beam bridge over three cement pipes used to allow water to pass from the local creek.
This is a strong support when the structure is level and gravity pulls down evenly on the structure.
www.pennridge.org /works/beamstruct.html   (420 words)

 Mine Safety and Health Administration (MSHA) - Coal Mine Fatal Accident Investigation Report: Fatality #14 - June 9, ...
When a rope is wrapped around a load with a sharp edge, such as the beam the rope was attached to during the accident, proper rigging procedures recommend a protective barrier be placed between the rope and sharp edge to protect the rope from being damaged by the sharp corner.
The beam the rope was placed around at the time of the accident was a 5 inch wide flange beam with a weight of approximately 15 pounds per linear foot.
The edge of the flange of the beam was bent upward approximately ¼ inch in the area where the rope was attached to the beam.
www.msha.gov /FATALS/2003/FTL03c14.HTM   (3399 words)

 Replacing A Load-Bearing Beam In A Porch Roof
A previous owner had replaced the load bearing beam with a smaller piece of wood, and the roof was sagging by about 1½" in the middle of the beam span.
These supports bear directly against the beam, so this technique would not apply in our case, but if the corner columns or the ends of the beam had to be repaired, this method would be an excellent choice for temporary support.
In order to have the tallest possible beam, we carefully measured the space between the bottom of the old ceiling joists and the supporting points that the beam had to rest on.
www.hammerzone.com /archives/framecarp/repair/porch/beam13/replace.htm   (4329 words)

 AccSys : FAQ : What is the pulsed structure of a linac beam?
The "macro-structure" of the output beam is determined by the pulsing of the rf power input to the linac and the injected charged particles.
Typical values of the output beam pulse width and beam pulse repetition rate are indicated in figure 1.
In addition to the pulsed structure resulting from the pulsed input power and beam, the output beam during each "macropulse" also has a "microstructure" determined by the operating parameters of the linac.
www.accsys.com /faq/question01.html   (254 words)

As shown in figure 1a, the structure consists of two identical uniform cantilevered beams, a rigid mass fixed to the ends of the beams, and a dashpot attached to the mass.
This single-degree-of-freedom motion is a consequence of the axial rigidity of the beams and the rigidity of the mass.
The structure is mounted to a stiff wooden frame designed to rest on a stable horizontal surface, such as a floor (not a table), so that x(t) is in a horizontal plane, perpendicular to the direction of gravity.
www.aoe.vt.edu /~devenpor/aoe3054/manual/expt6/text.html   (4458 words)

 American Duro Beam . : [ Why I-Beam Style? ] : .   (Site not responding. Last check: )
It is so named because of the profile of the steel beam looks like a capital letter "I", forged out of steel.
Each solid steel "I" beam truss is raised and then bolted (or formed into) to the concrete foundation.
In between each mainframe steel "I" beam truss are steel purlins and girts running horizontally up the wall and roof, usually every 3-6 feet (1-2 meters).
www.americandurobeam.com /whyIbeam.shtml   (317 words)

 S5 3D Beam Structure
Physical Problem: Structural analysis of the bicycle frame made of hollow aluminum tubing shown in the figure.
Material: Assume the structure is made of aluminum with modulus of elasticity E=75 GPa.
Boundary conditions: The structure is constrained in the X, Y and Z directions at the bottom three corners.
www.andrew.cmu.edu /course/24-ansys/htm/s5_beam3d.htm   (841 words)

 CERN Courier - US facility explores wakefie - IOP Publishing - article
While the drive beam is always delivered to the drive-line wakefield device, the path of the witness beam depends on the mode of operation.
Since both beams originate in photoinjectors, the time separation between the beams can easily be varied by adjusting the optical path of one injector's laser input pulse with respect to the other.
Using the high-charge beams available from the AWA drive line, plasma wakefields with gradients as high as 30 MeV/m have been measured and an electron beam has been observed propagating through a self-focused ion channel in a plasma for the first time in a plasma wakefield accelerator.
www.cerncourier.com /main/article/42/5/13/1   (1107 words)

 Structural Analysis of Three-Span Beam Structure
The structure carries three external loads -- a 10 kN point load in the middle of span 1, a uniform load of 2 kN/m across span 2, and a point load of 10 kN point at the tip of span 3.
This problem is complicated by the distributed loadings along the beam structure, and the limitation that Aladdin 2 does not explicitly support distributed element loads as a special type of input.
We will assume that the structure is linear elastic and that "small deflection theory" holds -- that is, the joint displacements are very small compared to the dimensions of the structure, and that equilibrium of the deformed structure can be expressed in terms of the undeformed coordinate system (of course this is is an approximation).
www.isr.umd.edu /~austin/aladdin.d/wjlin-beam.html   (1327 words)

 Deflections - Method of Virtual Work - Vertical Deflection by Cantilever Method
The modulus of elasticity (E) and the moment of inertia (I) are constant for the entire beam.
This method is applicable since the structure is assumed to be elastic and the deflections are small.
The negative sign indicates that the displacement is opposite to the direction of the unit load that was applied at C - therefore the deflection is upward.
www.public.iastate.edu /~fanous/ce332/virtualwork/beamdeflection.html   (788 words)

 Lateral Stability of Beam and Deck Structure   (Site not responding. Last check: )
Because the effects of beam depth and span length on lateral stability are well known, the experiments were designed to study the influence of deck stiffness on stability of a beam-deck structure.
A pair of deep beams, with attached deck, was loaded with end moments to produce pure bending in vertical planes parallel to the longitudinal axis of the beams.
It was found that critical bending moments twice those for unsupported beams could be obtained with a deck of moderate shear stiffness fastened to the compression side of the beams.
www.pubs.asce.org /WWWdisplay.cgi?0103751   (173 words)

 Beam - Wikipedia, the free encyclopedia
Beam (nautical), the most extreme width (or breadth) of a nautical vessel, or a point alongside the ship at the mid-point of its length
Tractor beam, a hypothetical beam that pulls or pushes
BEAM robotics, an automatically moving machine based on analog electronics
en.wikipedia.org /wiki/Beam   (146 words)

 True Integration
The Delphi Steel Hybrid Cross-car Beam is a next-generation innovation, featuring true integration of the cross-car structure, HVAC ducting and case support, airbag system, steering column, and electrical component support.
The beam's basic structure begins with a straight steel tube that is formed using Delphi's patented welding technologies to achieve NVH properties similar to typically a larger and heavier all steel beam.
Elements of the HVAC module, such as primary air and defrost ducts, are incorporated into the beam, reducing clearances and capitalizing on unused space under the instrument panel.
www.delphi.com /news/featureStories/ms74685-03212006   (680 words)

a structural element formed from steel wire bound in strands; the suspending element in a bridge; the supporting element in some dome roofs
characteristic of a structure that is able to carry a realistic load without collapsing or deforming significantly
the vertical structure in a suspension bridge or cable-stayed bridge from which cables are hung; also used loosely as a synonym for the term skyscraper
www.pbs.org /wgbh/buildingbig/glossary.html   (1547 words)

 Instructions - Bending of statically indeterminate (continuous) beams   (Site not responding. Last check: )
The number of intermediate pin supports could be arbitrary, but the beam structure must be statically indeterminate.
Then the user has to enter the length of the beam L, number of pin supports (excluding left one), number of couples (external moments), concentrated and distributed loads, which are applied to the beam and submit these data.
Such representation of deflection is convenient when a beam is not designed yet and its properties are not defined.
www.soft4structures.com /Beam/st_instruction.html   (437 words)

 About the Flextester
It consists of two adjacent beams that are clamped at both ends and rigidly connected to each other at the center.
The wafer is clamped on the wafer holder and the probe head needle is engaged with the structure under test.
The four beam thickness measurements that are taken there show that the beam's cross section is quite reduced around the lower portion which means that the bending stiffness of the overall beam is most likely lower than for a beam that would have a constant thickness of 6.7 microns.
pergatory.mit.edu /flextester/Results/results.htm   (958 words)

 Deflections - Method of Virtual Work - Rotations by the Cantilever Method
Using the same structure as used in the Beam Deflection examples, determine the rotation at A of the beam shown in the figure below using the Cantilever Method.
Using the cantilever method, fix the structure at joint B and draw the resulting moment diagram induced by the applied "real" loads.
The positive sign indicates that the rotation is in the same direction as the unit moment applied at A - therefore the rotation is in the clockwise direction.
www.public.iastate.edu /~fanous/ce332/virtualwork/beamrotation.html   (652 words)

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