Also, in the slope intercept form, y=mx+b, m is equal to the slope. y2-y1/x2-x1 are the coordinates that you use to figure out the slope. B stands for the y-intercept. Y and x in the slope intercept form are only variables that you plug in from your points on the cortesian coordinate plane.
Contraction joint. c. Construction joint. Out of these Expansion joint and Contraction joints are stress relieving ones while the construction joint is not. Joints can be vertical or horizontal. Vertical joint in a building is at the beam bottom of the column and wall junctions. These joints-Expansion and contraction joints separate the structures and pavements Careful preplanning the location is important for minimum crack free structural members.
All bridges have 4 main characteristics: form, span, material, and travel surface in relation to the structure. A truss bridge is one form that a bridge can take and there are at least 30 different kinds of truss bridges, including the Warren, Pratt, and Howe designs among others. Truss bridges can have any of the 3 span types including simple, continuous, or cantilever. They are often made of metal, specifically steel or iron, but can also be made of wood (such as covered bridges). The travel surface of a truss bridge may be called deck, pony, or through truss. A deck truss allows traffic to travel on top of the structure whereas a pony truss allows traffic to travel between two superstructures that do not connect at the top. Finally, a through truss is similar to pony truss, except the superstructures connect overhead. What makes a truss bridge historic?