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.
Beam bridges. The simplest type of bridge was the girder or beam bridge, which stretched from one side of a river to the other. Where the river was too wide, the beams rested on supporting piers in midstream. This style of bridge was common in New Zealand because it was normally the cheapest.