I am doing graduation design, but encountered stairs do not understand ah. As shown in the figure, the board staircase, I took two plates to illustrate (platform plate and staircase ramps). The staircase plate as a one-way plate, so the power of the board on the first pass is flattened short edge direction, get two rectangles, it is not the left side of the area of the force transmitted to the left side of the beam, right side of the rectangular area of the force passed to the right beam? Why is the book said to the stairs beam (TL1 and TL2)? Is the unidirectional plate not passing along the short side, and then the beam from the long side to bear this force? Similarly, the platform board should also be by KL2 and TL1 these two long side beams to force, is not it?
Whether it is in the direction of the long side of the force, or along the short side of the force, the calculation method is the same, take 1 meter width for the calculation unit.
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If you are designed to convey the load along the long side of the stairs, that is, the load on the stairs is delivered to TL1, TL2, the staircase is 1.6 meters wide but only 1 meter. Calculated after the distribution of this load through the force of the load and loaded into the TL1, TL2 beam.
Of course, can also be made along the short side of the force of the one-way plate, it must be in the stairs on the side of the side of the addition of a ramp beam, but in most cases, this design problems. On the one hand the cost will increase, on the other hand there may be insufficient clearance to promote the height of the need to increase.
In general, the staircase (swash plate) part of the design of the single-sided plate, along the longitude of the stairs to send the load, with the map you provide is the staircase load to TL1, TL2, and then by TL1, TL2 To the stairs on both sides of the wall (or beam or column), this is because the stairs along the short side of the side of the KL1 and the other side is floating.
