what are trusses?wat are its conditions?
916053
Trusses are structural elements made made up of individual members connected at joints. For determinate trusses, you can set up force and moment equilibrium equations for each joint.  Indeterminate trusses it takes a little more effort to do as well as explain, but there are methods for that, which are mostly computerized now.\n\nI would suggest two things: First, reading the article on Wikipedia about trusses. And Second, if you have more questions of this type, you will probably get better and faster answers by putting your question in the Science and Mathematics category under engineering.
177392
In modern usage, civil engineering is a broad field of engineering that deals with the planning, construction, and maintenance of fixed structures, or public works, as they are related to earth, water, or civilization and their processes. Most civil engineering today deals with roads, structures, water supply, sewer, flood control and traffic. In essence civil engineering is the profession which makes the world a more habitable place to live.\n\nEngineering has developed from observations of the ways natural and constructed systems react and from the development of empirical equations that provide bases for design. Civil engineering is the broadest of the engineering fields. In fact, engineering was once divided into only two fields--military and civil. Civil engineering is still an umbrella field comprised of many related specialties.
282242
that's a real vague question, try to be more specific or at least say what king of structure do u want? (steel, conc, ..?)\nanyways this is an exremely simple example.\n\nlets' say u want to design a tension member -carrying tension force = 100 tons, -between 2 supports and this member is a steel member of yield stress= 1.4\nso to get the area u need :\n100/1.4= 71.43 cm square let's say again u want it to be I-shaped steel then u'll need  I number 400 i.e IPE 400
1045032
We're hiring slowly, but growing. We build many telecommunication spacecraft. Most large structures are Composite while smaller structures and components are aluminum.\n The industry will soon develop a replacement for the Shuttle which only has a few years left of service
1022191
depends. What kind of house? How many stories is it currently? What is the material? What is the foundation? Can the house support another level? Does it need additional support for the weight? How much square footage? Do existing structural supports need to moved? \n\nAnd why is this in the computer section? I could see if you're asking about Autocad, but you're not.
217303
A Truss bridge is of old design, usually of wood or iron. Shifting of the ground can cause the truss to warp requiring costly repair. They do not allow much traffic beneath, such as over rivers. They are not pretty.\n\nA suspension bridge has extreme weight to be held by means of cables. Also, the pilons or towers require great strength and durability in the ground. Over time the towers and cables can give way. Some of the more notorius failures were due to wind causing the bridge to sway and eventually reaching resonant frequency. This has been caught on video tape. Quite a scene to watch.
519463
I guess wat u wanna know if whether a series of point loads on a trussed structure is considered as a UDL.\n\nThe answer is NO. This is because in trusses, the load transfer takes place through the joints and members considering axial loads only. In fact, while designing a truss, the uniformly distributed loads coming on it are converted to point loads so that the analysis and subsequent design of the truss can be accomplished effectively.
846179
Capacity of a material to deform permanently (e.g., stretch, bend, or spread) in response to stress. Most common steels, for example, are quite ductile and hence can accommodate local stress concentrations. Brittle materials, such as glass, cannot accommodate concentrations of stress because they lack ductility, and therefore fracture easily. When a material specimen is stressed, it deforms elastically (see elasticity) at first; above a certain deformation, called the elastic limit, deformation becomes permanent.
525510
The design of a truss can be simplified using vector diagrams where member forces are directed toward or away from a joint represented as a point or pin (compression or tension).  The properly designed truss would work if in fact connected using pins.  Of course, the actual joints (welded or riveted) must be designed in detail with appropriate safety factors including other relavent factors such as wind loads, traffic, dynamic loads, differential thermal loads, metals/alloys used, etc.
207168
Try this:\nhttp://www.accessscience.com/Encyclopedia/3/37/Est_370700_frameset.html?doi
564360
Very high concentrated forces at some point on the girder may cause Web Buckling (bending of web out of its plane) or Web Crippling (localised crushing of web at junction with the flange). Concentrated forces are generally at supports.\n The girder then has to be STIFFENED at such points attaching BEARING STIFFENERS to web running between top and bottom flange. The stiffener may be STEEL FLATS or SINGLE/DOUBLE ANGLES. \n The design of stiffeners is goverened by IS-800:1984.
1180346
Unfortuantely the pictures do not show up, but here is how the math works...\n\nThe following drawing shows 3 views of a Hip Roof. TOP \n\n\nWith the information above we find the information needed to make each of the following: Ridge, Normal Rafters, End Rafters, Hip Rafters, and Jack Rafters. ( see the following figure ) We also find the squares of shingles and # sheets of plywood to cover the roof.
292435
use trusses. basically triangles. if u wanna do it easily, use 45 degree angles. to make it more stable use 30 and 60 degree angles. so basically make each side first and then to connect between them, i have no clue but dont do it straight across. u have to connect the top of the left to the bottom of the right. o rsomethin
443053
Metals are shiny and are good conductors of heat and electric current. They are malleable and ductile.\nNon-metals are dull, and are poor conductors of heat and electric current. They're brittle and unmalleable.
785925
This n terms f civil engineering refers to the views in which objects- from a simple line , a 2-D , a 3-D to combinations of 3-D which form a shape( a building).. Views mean when u look from the top how it looks;, from the front, how it looks, etc.. it s quite interesting if u understand the subject..
206294
Civil engineering is the oldest form of engineering.  It is the design and construction of public structures and facilities.  Civil Engineers typically design bridges, dams, water treatment plants, highways, and power stations.  A civil engineer will analize the forces that will be present in the project area as well as the types of soil, water shed etc.  They will use what they gather to design a system that will both complete the task at hand but also complement the environment around it.  With what they find they use math and complex analysis to see if their designs are safe.
994566
Working for a company that designs timber roof trusses, I am unaware of any freeware. \n\nAs the design of roof trusses is complex, it may not look like it, I would strongly advise going to someone in the know.\n\nFreeware tends to lack the important part of the program, which ultimately means having to subscribe. Then there are no guarantees that it uses all the relevant criteria.